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Restumping in SA

Restumping is the foundation work that addresses settlement, rot, termite damage, and progressive movement under older timber-framed homes. The work concentrates in inner-Adelaide suburbs and regional centres where homes built before the 1960s typically sit on timber, concrete, or steel stumps rather than the modern engineered slabs that dominate post-1980 construction. The category combines structural engineering, hydraulic jacking and lifting, excavation, careful materials handling, and the technical skill required to lift a home back to level without damaging the structure that has spent decades adapting to its current position. Quality restumping work corrects floor levels, addresses cracking in walls and ceilings, eliminates squeaks and movement in floorboards, and extends the structural life of the home by another 50 to 100 years.

SA presents some specific local conditions that make restumping particularly relevant. Reactive clay soils through the Adelaide foothills, Mt Barker, the eastern suburbs (Burnside, Beaumont, Toorak Gardens, parts of Kensington and Norwood), and parts of the south-east cause seasonal house movement of 10 to 30 mm between summer dry conditions and winter wet conditions. Older homes on shallow stumps amplify this movement, with the cumulative settlement over decades producing the characteristic sloping floors, jamming doors, cracking cornices, and squeaking floorboards that homeowners typically associate with old-house character but that often signal foundation issues that restumping can address.

Salt damp combined with stump rot is a particular concern in inner-suburb cottages around Bowden, Hindmarsh, Brompton, Mile End, Goodwood, Port Adelaide, Semaphore, and the historic Port River area. The combination of high water tables, salt-laden groundwater, and pre-1960 untreated timber stumps produces accelerated stump deterioration that can affect dozens of stumps simultaneously. Heritage cottage restumping in these zones often combines restumping with damp-proof course remediation, ventilation improvements, and timber repair work to address the underlying conditions. Engaging a restumping specialist with experience in salt damp environments is essential for these projects.

Heritage zones in inner-Adelaide suburbs add aesthetic and approval considerations to the technical scope. Suburbs including North Adelaide, Walkerville, Norwood, Kensington, Unley, Goodwood, Mile End, Hyde Park, Glenelg North, Port Adelaide, Burnside, Hahndorf, Strathalbyn, Burra, and Gawler all contain significant heritage stock where restumping work must consider visible aspects (perimeter stumps, sub-floor ventilation grilles, garden levels) alongside the structural work. Council heritage controls under the City of Adelaide, City of Burnside, City of Norwood Payneham and St Peters, City of Unley, City of Charles Sturt, and the Adelaide Hills Council may extend to visible foundation elements on listed properties.

What follows is a complete guide to restumping in SA: the major scope categories, realistic 2026 pricing for Adelaide and the regions, the licensing context administered by Consumer and Business Services SA, and a practical checklist for evaluating quotes. Restumping is typically the first major scope in any heritage renovation; the work commonly precedes timber wall framing repairs, roof framing reinstatement, and substantial trim work including door installation, skirting and architraves, and cornice installation as the home is brought back to level and finish. For broader carpentry context see the carpentry services SA hub and for current restumping work the tradie jobs Australia board.

Restumping Scope Selection

Restumping scope selection is the first major decision homeowners make when planning foundation remediation work. The category breaks roughly into five scopes that each carry different cost, lead time, and disruption implications. Single stump replacement addresses isolated stumps where damage is localised. Releveling work jacks the home back to level and shims the existing stumps without full replacement. Partial restumping replaces stumps in a specific area where damage is concentrated. Full restumping replaces every stump under the home. Underpinning is the engineered foundation reinforcement work for sites with substantial settlement requiring more substantial intervention than standard restumping.

The right scope depends on the underlying problem. A home with isolated rot in 2 or 3 stumps but otherwise sound foundations typically needs single stump replacement, total cost $600 to $2,100. A home where the floor has gone out of level but the stumps are still structurally sound typically needs releveling, total cost $3,500 to $9,000. A home where one corner has settled significantly while the rest remains stable typically needs partial restumping in that corner, total cost $4,500 to $12,000. A home where the stumps are widely deteriorated (typical of older homes never restumped) typically needs full restumping, total cost $15,000 to $40,000. A home with deep-seated soil or settlement issues that stumps alone cannot address typically needs engineered underpinning, total cost $25,000 to $80,000.

Diagnosing the right scope requires inspection by an experienced restumping specialist or structural engineer. Visual inspection of the sub-floor space identifies the visibly damaged stumps; level surveys across the floor identify the settlement pattern; tap-and-probe testing of stumps identifies the structurally compromised stumps that may not be visibly damaged; soil testing identifies the underlying soil class. A quality diagnosis combines all these inputs to recommend the appropriate scope; cheap operators sometimes default to full restumping regardless of the actual condition because it produces the largest invoice.

The economic case for full versus partial restumping deserves attention. Full restumping is more expensive in absolute terms but cheaper per stump because the crew can work efficiently across the whole home rather than mobilising separately for each section. Partial restumping at $200 to $300 per stump (counting only the replaced stumps) typically converts to $300 to $500 per stump (counting only those replaced) when delivered as a partial scope, because the overhead per stump is higher. For homes where 60 percent or more of the stumps need replacement, full restumping is usually the more economic choice; for homes where only 20 percent or less need replacement, partial work is usually the more economic choice; the middle band warrants careful comparison.

Disruption to the homeowner is a major practical consideration. Full restumping typically requires the homeowner to vacate the home for 1 to 4 weeks because the floor levels are progressively adjusted during the work and access is constrained. Releveling work typically allows the homeowner to remain in the home with some restrictions on movement during the active jacking phases. Single stump replacement and partial restumping in a specific area typically do not require the homeowner to vacate. Confirming the disruption expectation at quote stage avoids the unwelcome surprise of needing to arrange short-term accommodation mid-project.

Insurance coverage for restumping work depends on the cause of the underlying damage. Damage caused by a covered event (escape of water from a burst pipe, storm damage, vehicle impact) is typically covered by home and contents insurance. Damage from progressive settlement, soil movement, or termite activity is typically excluded. Confirming the insurance position with the insurer at the planning stage is sensible due diligence; some homeowners discover after starting work that their insurance does not cover what they assumed it would. Termite damage to subfloor framing is commonly discovered during restumping diagnosis; the termite treatment guide covers the related framing repair scope.

Full Restumping Replacement

Full restumping is the most substantial restumping scope and the appropriate choice where the existing stumps are widely deteriorated, where settlement has affected the home throughout, or where the homeowner is undertaking major renovation that warrants comprehensive foundation remediation as a precursor to other work. The work involves replacing every stump under the home with new concrete, steel, or treated timber stumps, jacking the home progressively to correct floor levels, and reconnecting the floor framing to the new stumps with appropriate brackets and fixings.

Pricing for full restumping typically runs $15,000 to $40,000 fitted for a standard 3-bedroom home depending on the stump count, the soil classification, the stump material, and the access conditions. Smaller homes (1 to 2 bedroom cottages) at the lower end of the range run $10,000 to $22,000. Larger 4 to 6 bedroom homes run $30,000 to $70,000. Heritage cottages with specific structural complexities run $18,000 to $55,000. Underpinning combined with restumping (where soil conditions warrant) adds $15,000 to $50,000-plus to the base restumping scope.

The standard full restumping sequence begins with a comprehensive site survey including stump count, condition assessment, level survey of the existing floor, and soil testing. Engineering design follows, specifying the stump positions, stump sizes, footing depths, and any structural reinforcement required. Council development approval is typically required and takes 2 to 8 weeks depending on the local government area. Site preparation involves clearing the sub-floor space, isolating any services running through the sub-floor, and arranging access for excavation equipment.

The active restumping work proceeds methodically. Each stump location is excavated to the required footing depth, the existing stump is removed, the new footing pad is placed and cured (typically 24 to 48 hours for in-situ concrete), and the new stump is installed and connected to the floor framing above. The crew typically works on 4 to 8 stumps at a time, allowing the floor framing to remain supported by the surrounding stumps while individual stumps are being replaced. The entire process typically takes 3 to 6 weeks for a standard 3-bedroom home, with the homeowner typically vacating during the most active phases.

Floor releveling is performed progressively during the restumping work as new stumps are installed at the correct heights. The releveling process is delicate; lifting a settled home back to original level can stress the original construction in ways that produce cracks in walls, ceilings, and external cladding. Quality operators perform the releveling slowly (typically 5 to 10 mm per week of lift) to allow the structure to adapt without distress; cheap operators sometimes lift quickly to save labour, with the consequence being visible cracking that requires extensive cosmetic remediation.

Cosmetic remediation following full restumping is a separate scope that the homeowner should plan for. Lifting a home back to level typically opens cracks at cornices and skirting joins, may cause door and window misalignment, and may produce small cracks in plasterboard linings. The remediation work typically runs $3,000 to $12,000 depending on the home and the extent of the lift. Quality restumping operators discuss the expected cosmetic remediation at quote stage and may offer to coordinate the remediation work as part of the broader scope. Licensed builders specialising in foundation work and restumping can find current opportunities through the builder jobs Australia board.

Partial Restumping Work

Partial restumping addresses localised damage or settlement in a specific area of the home rather than across the entire footprint. The category typically applies where one corner of the home has settled significantly, where rot or termite damage affects a specific zone (often near a leaky bathroom or laundry, or where ground-level water has accumulated), or where settlement affects a particular wing or extension while the original home remains stable.

Pricing for partial restumping typically runs $4,500 to $12,000 fitted depending on the section size, the stump count in the affected zone, and the access conditions. A single corner section with 10 to 15 stumps typically runs $4,500 to $7,500. A larger section covering one full side of the home with 20 to 30 stumps typically runs $7,000 to $12,000. The cost-per-stump in partial work typically runs 30 to 60 percent above full restumping equivalent because the crew overhead is higher per stump on smaller jobs.

Partial restumping involves the same technical work as full restumping but on a contained scale. The affected section is excavated, the stumps are replaced, and the local floor levels are adjusted. The interface between the restumped section and the unchanged adjacent section requires careful attention; the new section must be brought to the same level as the adjacent section, with smooth transitions in the floor framing to avoid visible step changes. Quality operators take a level survey across the whole home before partial work to establish the target levels; budget operators sometimes lift the partial section to original level without checking the rest of the home, producing visible mismatches.

Partial restumping is often the right scope where the underlying problem is localised. A laundry that was added as an extension 30 years ago and has settled while the original home remains stable typically needs only the laundry footprint restumped. A back corner of the home where ground water has accumulated and rotted the local stumps typically needs only that corner addressed. A side bedroom that was built with shallower stumps than the rest of the home and has settled differentially typically needs only that section restumped.

Partial restumping carries some risks worth understanding. The boundary between the restumped section and the adjacent unchanged section can become a stress concentration point where the home structure must accommodate the differential conditions. Cracks may develop along the boundary line over time as the unchanged section continues to settle while the restumped section remains stable. Quality engineers consider this in the partial restumping design and may recommend extending the scope to include adjacent stumps as a precaution. The decision between strict partial and slightly expanded scope is best made with engineering input rather than purely on cost grounds.

Partial restumping disruption is materially less than full restumping. Most homeowners can remain in the home during partial work, with some restrictions on movement near the active work area. Services typically remain operational throughout partial work because the work zone is contained and services in other areas of the home are not affected. The project duration typically runs 2 to 4 weeks depending on the section size, with the active work taking 1 to 2 weeks within that timeframe.

Releveling and Jacking

Releveling work jacks the home back to level and shims the existing stumps without replacing them. The category applies where the existing stumps are still structurally sound but the cumulative settlement has produced unacceptable floor slopes, sticking doors and windows, or visible cracking in walls and ceilings. Releveling is the lightest restumping intervention and the appropriate choice where the underlying foundation is intact but the floor has gone out of level.

Pricing for releveling typically runs $3,500 to $9,000 fitted depending on the home size, the stump count, the extent of lift required, and the access conditions. A small home with 25 to 40 stumps and modest lift requirements (typically 10 to 25 mm) runs $3,500 to $5,500. A larger home with 60 to 100 stumps and significant lift requirements (25 to 50 mm) runs $5,500 to $9,000. Very large homes or homes with substantial differential settlement may run higher.

The releveling sequence involves placing hydraulic jacks at strategic points under the floor framing, lifting the floor in a coordinated pattern to bring the levels back to specification, shimming the gaps between the floor framing and the existing stumps with engineered packing, and securing the shims to maintain the corrected levels. The work is delicate because the lift forces can stress the original construction; quality operators monitor the structure during lift for any signs of distress and adjust the lift pattern accordingly.

The lift pattern is critical to a successful releveling. Lifting one corner alone can cause the home to twist; lifting too quickly can crack walls and ceilings; lifting unevenly across the floor can introduce new misalignments while correcting existing ones. Quality operators plan the lift pattern based on the existing floor levels and the desired final levels, working in small increments (typically 2 to 5 mm per cycle) and verifying the levels at each cycle before proceeding. The complete releveling typically requires 3 to 8 lift cycles depending on the total lift required.

Shimming materials and quality matter for the long-term reliability of the releveled floor. Quality shims are made from engineered packing materials (high-density structural plastic, treated hardwood, or steel) that resist compression and weather over decades of service. Cheap shims (untreated softwood, generic builders' plywood) may compress or rot over years of use, allowing the floor to settle back toward its pre-releveling position. Asking the operator about the shim material at quote stage is reasonable due diligence on releveling work.

Releveling has limits. Where the underlying stumps are deteriorated or where the soil conditions continue to cause settlement, releveling provides only temporary correction; the floor will progressively return toward its pre-lift position over months or years. Quality operators identify these limits at the diagnosis stage and recommend full or partial restumping rather than releveling alone. The releveling cost is wasted if the underlying conditions are not addressed; for sites with reactive clay or progressive stump deterioration, restumping is usually the right scope rather than releveling alone. After releveling work, floor sanding to address minor surface variations is a common follow-on scope; the floor sanding guide covers the related work.

Underpinning

Underpinning is the engineered foundation reinforcement work for sites where standard restumping is inadequate to address the underlying conditions. The category applies where deep-seated soil movement, problematic soil conditions, or substantial settlement has produced foundation issues that cannot be corrected through stump replacement alone. Underpinning typically involves engineered piers extending to deeper, more stable soil layers, structural foundation beams transferring loads to the new piers, and substantial structural integration with the existing home structure.

Pricing for underpinning typically runs $1,500 to $4,500 per pier installed, with major underpinning projects involving 10 to 30 piers running $25,000 to $80,000-plus total. The pier depth is typically 1.5 to 4 metres for residential applications, with deeper piers (4 to 8 metres) used for problematic soil conditions. The pier method (screw piles, bored piers, mass concrete piers, mini-piles) is selected by the structural engineer based on the soil conditions and access constraints.

Site investigation is the critical first step on any underpinning project. The investigation typically includes soil testing (cone penetration tests, boreholes, soil samples) to characterise the soil profile, level surveys to map the existing settlement pattern, structural inspection of the home to identify the load paths, and historical research on the site (previous use, fill materials, water table behaviour). The investigation typically costs $3,500 to $12,000 depending on the project complexity and provides the engineering data needed for the underpinning design.

The structural engineering for underpinning is substantially more demanding than standard restumping. The engineer must design the pier configuration, the load transfer path, the foundation beam arrangement, and the construction sequence. The engineering fee typically runs $4,500 to $15,000 for a standard residential underpinning project and is non-negotiable; underpinning without engineering is unsafe and not lawful in most jurisdictions. Standards Australia AS 2870 (Residential slabs and footings) provides the framework for residential foundation design.

Council development approval is typically required for underpinning work because of the structural alterations involved. The approval process typically takes 6 to 12 weeks depending on the local government area; for heritage zone properties, the approval timeframe may be longer and may impose specific construction constraints. Engaging with the council early in the project planning is sensible due diligence and can identify any approval issues before substantial design work is committed.

Underpinning disruption is substantial because the work involves excavation around the perimeter of the home and load transfer operations that affect the structural stability during construction. Most homeowners must vacate during the active underpinning phases (typically 4 to 8 weeks). Services typically need to be temporarily disconnected and reconnected as the work progresses around the home. The total project timeline including engineering, approval, and construction typically runs 4 to 9 months from initial planning to completion. Concreters working on foundation and underpinning projects can find related work through the concreter jobs Australia board.

Stump Materials and Engineering

Restumping materials in SA are dominated by concrete and steel options, with treated timber occasionally used for budget projects and heritage-matching applications. Each material has its own service life, cost profile, and structural characteristics that affect the appropriate selection.

Concrete stumps are the dominant choice in current SA restumping work. Standard concrete stumps are precast in 1,000 mm to 1,500 mm lengths with a square or rectangular cross-section (typically 100 mm to 150 mm). The stumps are placed on engineered footing pads and connected to the floor framing above with steel brackets or threaded rod connections. Service life typically runs 75 to 100-plus years depending on soil conditions and quality of installation. Pricing typically runs $80 to $180 per stump supply, with installation labour adding $150 to $400 per stump depending on access and complexity.

Steel stumps offer some advantages over concrete in specific applications. Steel stumps (typically galvanised hollow sections, 90 mm to 100 mm square or round) are lighter than concrete equivalents, easier to install in tight access conditions, and offer adjustable heights through threaded connections. Service life typically runs 50 to 75 years for galvanised steel, with longer service available for hot-dipped or epoxy-coated alternatives. Pricing typically runs $120 to $280 per stump supply, with installation labour adding $180 to $450 per stump.

Adjustable steel stumps are a specialist category used for sites with continuing settlement risk. The stumps include threaded screw mechanisms that allow the homeowner or maintenance contractor to adjust the height as settlement continues over years. The category is most useful for reactive clay sites where some ongoing movement is expected; the adjustable stumps allow correction without further restumping work. Pricing typically runs $200 to $500 per stump for adjustable steel options, with the higher cost justified by the long-term flexibility.

Treated timber stumps are now uncommon in new restumping work because of the maintenance burden compared with concrete and steel alternatives. The treatment grades required for in-ground service (H4 or H5 under AS 1604) provide reasonable rot resistance but the service life is typically 25 to 40 years compared with 75-plus years for concrete. Treated timber may still be specified for heritage-matching applications where the visible aesthetic matters and the homeowner accepts the maintenance schedule. Pricing typically runs $60 to $140 per stump supply.

Footing pad design varies by soil class and stump material. Standard footing pads under concrete stumps are typically 400 mm x 400 mm x 200 mm thick reinforced concrete, sized to distribute the load to the underlying soil. Larger pads (600 mm x 600 mm or larger) are required for high-load applications, soft soil conditions, or wide-spaced stumps. Engineering design for the footing pads is mandatory under AS 2870 for any structural restumping; quality operators include the engineering in their quote rather than treating it as an extra.

Connection brackets between the stumps and the floor framing are the engineered hardware that transfers the floor load to the stump and resists wind uplift. Standard brackets are typically galvanised steel L-brackets or U-brackets with through-bolt connections. Premium brackets include hot-dipped galvanised or stainless steel for additional corrosion resistance, and engineered seismic-rated brackets for high-load applications. Connection bracket cost typically adds $20 to $80 per stump to the materials cost.

Diagnosing Settlement and Rot

Accurate diagnosis of foundation issues is the basis of any quality restumping recommendation. Visible symptoms in the home (sloping floors, sticking doors, cracking walls, squeaking floorboards) can have multiple underlying causes, and the right remediation depends on identifying the actual cause rather than treating symptoms with the wrong scope.

Sub-floor inspection is the starting point for any restumping diagnosis. The inspector enters the sub-floor space through an access hatch or external access, visually inspects each stump for rot, termite damage, mechanical damage, or settlement, and probes suspect stumps with a metal rod to assess timber soundness. The inspection identifies the visibly damaged stumps but may not detect early-stage damage that has not yet manifested visibly. Quality inspectors document the findings with photographs, sketches, or digital records that the homeowner can review.

Level surveys quantify the existing floor level pattern. The survey typically uses a self-levelling laser or digital theodolite to measure the floor height at a grid of points across the home, producing a contour map of the existing floor levels. The survey identifies the high and low points, the direction and magnitude of any slope, and the locations where releveling work is most needed. Survey data is essential for any restumping engineering and provides the baseline against which the post-work levels can be measured.

Soil testing characterises the underlying soil conditions. Standard residential soil testing (typically a single borehole or cone penetration test to 1.5 to 3 metres depth) costs $400 to $1,500 and provides the soil classification under AS 2870. The classification (Class A, S, M, H1, H2, E, P) determines the engineering requirements and influences the footing pad sizing. For complex sites, more extensive testing may be warranted, with multiple boreholes and laboratory testing of soil samples adding $1,500 to $5,000 to the investigation scope.

Termite inspection is a related diagnostic step that identifies any active or historical termite activity affecting the foundation. Termite activity is a common cause of stump deterioration in older SA homes, particularly where the foundation has had decades of exposure to moderate or high termite hazard. Annual termite inspections by a licensed pest controller are recommended for any home over 10 years old; restumping work provides an opportunity to upgrade termite management at the same time as the foundation reinforcement.

Salt damp diagnosis matters specifically in inner-suburb cottages where high water tables and salt-laden groundwater accelerate stump and damp-proof course deterioration. The diagnosis typically combines visual inspection (efflorescence on internal walls, paint peeling, plaster crumbling at low levels), moisture meter readings, and salt content testing of wall and floor materials. Where salt damp is present, the restumping work should typically include damp-proof course remediation and improved sub-floor ventilation as integrated scopes; addressing the stumps without addressing the damp causes the new stumps to deteriorate prematurely.

Historical research can identify factors affecting the current foundation condition. Previous use of the site (filled gully, former orchard, demolished previous structure), history of major water events (broken water mains, flood damage, leaking sewer connections), and history of previous building work (extensions, alterations, previous restumping) all affect the appropriate scope. Older homes may have experienced multiple previous restumping events with varying quality; understanding this history helps the diagnosis identify the appropriate scope. Where the existing floor cannot be retained through restumping work, new floor installation is a related scope; the timber flooring guide covers replacement floor options.

Heritage Cottage Restumping

Heritage cottage restumping is a specialist scope concentrated in inner-Adelaide suburbs and regional heritage townships. The work combines technical restumping with the constraints of heritage approval, the practical challenges of working under structures with limited clearance, and the integration with surrounding heritage fabric (bluestone walls, timber floors, original joinery) that contemporary techniques may not handle sympathetically.

SA heritage cottages typically date from 1840 to 1900 and feature stone-and-rubble walls, timber floors on shallow stumps or bluestone footings, and decades of subsequent renovation that has often complicated the original foundation conditions. The bluestone, sandstone, and Adelaide-type freestone construction characteristic of these cottages predates modern building codes and was built to standards of the era. Restumping these cottages requires understanding the original construction methods and adapting the modern intervention to suit.

Suburbs and townships where heritage cottage restumping is concentrated include Norwood, Walkerville, Goodwood, Mile End, Bowden, Hindmarsh, Brompton, Port Adelaide, North Adelaide, Unley, Hyde Park, Glenelg North, Hahndorf, Strathalbyn, Burra, Mintaro, and the inner Hills towns. Each suburb has its own heritage character and council heritage controls that affect the visible aspects of restumping work. Engaging with the council heritage adviser at the planning stage is reasonable due diligence on any heritage cottage restumping project.

Pricing for heritage cottage restumping typically runs $18,000 to $55,000 depending on the cottage size, the structural complexity, the heritage approval requirements, and any combined scopes (salt damp remediation, sub-floor ventilation, services upgrades). The pricing typically reflects 30 to 60 percent premium over standard suburban restumping for the equivalent stump count, reflecting the additional care, approval coordination, and specialist skills required.

Salt damp combined with restumping is a specific heritage scope that warrants attention. Many inner-Adelaide cottages built before 1900 lack effective damp-proof courses, with the result that ground water rises through the wall fabric carrying salts that crystallise within the masonry and cause progressive deterioration. Restumping work provides an opportunity to install or repair the damp-proof course at the same time, typically using injection damp-proof course methods or physical membrane installation. The combined scope typically runs $25,000 to $80,000 for a substantial cottage.

Sub-floor ventilation upgrades typically accompany heritage cottage restumping. Original cottage construction often had inadequate ventilation grilles in the perimeter walls, with the result that the sub-floor space remained damp year-round, accelerating stump deterioration. Modern sub-floor ventilation with adequate grille area and sometimes mechanical ventilation reduces the moisture levels and extends the life of the new stumps. Pricing typically runs $1,500 to $4,500 added to the restumping scope. Coordinating ventilation upgrades with the restumping work is materially more efficient than performing them as separate later scopes. Where the underlying foundation work is for a substantial new dwelling rather than restoration, the granny flat builders guide covers new secondary dwelling foundation scope.

SA Standards and Licensing

Restumping work in SA falls within the broader building licensing framework administered by Consumer and Business Services SA under the Building Work Contractors Act 1995. Building work valued at $12,000 or more in any one job (or any work requiring development approval) must be performed by a licensed Building Work Contractor. Most full restumping, partial restumping, and underpinning work exceeds this threshold and must be performed by a licensed builder. Single stump replacement may sit below the threshold but typically benefits from licensed builder involvement for the consumer protection and warranty cover.

Trade qualifications relevant to restumping work include the Certificate III in Construction (CPC30220), the Certificate III in Carpentry, and the post-trade Certificate IV qualifications for building and construction. Some specialist restumping operators hold additional qualifications in concrete construction, structural engineering, or heritage building. For underpinning work, the structural engineer is typically a Chartered Professional Engineer (CPEng) registered with Engineers Australia; the engineering certification is mandatory and not negotiable.

Workplace safety on residential restumping sites in SA is regulated by SafeWork SA under the Work Health and Safety Act 2012 (SA). Specific safety considerations include working in confined sub-floor spaces (where ventilation, dust, and noise hazards apply), manual handling of concrete stumps and footing pads (workplace exposure limits apply for solo lifts above 25 kg), safe operation of hydraulic jacks and lifting equipment, electrical safety where temporary services are connected during work, and structural safety during the load transfer phases of restumping and underpinning.

Australian Standards relevant to restumping work include AS 2870 (Residential slabs and footings, the primary standard governing residential foundation design), AS 1684 (Residential timber-framed construction, governing the floor framing connections), AS 1170 (Structural design actions, providing the load case framework), AS 1604 (Specification for preservative treatment, relevant for any timber stump applications), and AS 3660 (Termite management, relevant for the termite barrier and treatment requirements). Standards published by Standards Australia are referenced throughout the design and inspection documentation.

Council development approval requirements for restumping work vary by scope. Single stump replacement and minor releveling work typically do not require approval. Full restumping, partial restumping in significant scopes, and any underpinning work typically require approval through the relevant local government area. The approval process typically takes 4 to 12 weeks depending on the council and the project complexity. For heritage zone properties, the approval timeframe may be longer and may impose specific construction constraints. The SA government planning portal provides general guidance.

Consumer protection in SA for residential restumping work runs through three layers. The Building Work Contractors Act provides statutory warranty (5 years structural, 1 year non-structural) on contracts above $12,000. The Australian Consumer Law (administered nationally by the Australian Competition and Consumer Commission) provides consumer guarantees on goods and services regardless of contract value. The South Australian Civil and Administrative Tribunal handles consumer-builder disputes where direct resolution fails, with small-claims jurisdiction up to $25,000 for minor work disputes. Most major restumping projects exceed the small-claims threshold.

Adelaide Metro Pricing

Adelaide metro pricing for restumping shows a moderate gradient between outer suburbs and inner-suburb premium zones, with the heritage character of inner suburbs adding complexity that the pricing reflects. The outer northern and southern suburbs (Salisbury, Elizabeth, Mawson Lakes, Munno Para, Onkaparinga, Aldinga, Seaford, Sellicks Beach) have relatively few homes requiring restumping because most stock is post-1980 slab construction; where restumping is required (older stock, project home additions on stumps), pricing typically runs at competitive metro rates. Standard full restumping in this zone runs $14,000 to $30,000.

Middle-ring suburbs (Marion, Brighton, Glenelg, Henley Beach, West Lakes, Modbury, Tea Tree Gully, Golden Grove, Holden Hill) include a mix of post-1960 slab homes and older stumped homes. Pricing for full restumping typically runs $16,000 to $35,000. Releveling typically runs $4,000 to $7,500. Partial restumping typically runs $5,500 to $11,000.

Inner-eastern and inner-southern suburbs (Norwood, Kent Town, Stepney, Maylands, Hackney, Walkerville, College Park, Unley, Hyde Park, Goodwood, Malvern, Toorak Gardens, Beaumont, Kingswood) carry premium pricing reflecting the heritage character of the housing stock and the higher proportion of older stumped homes. Full restumping typically runs $22,000 to $50,000. Heritage cottage restumping runs $25,000 to $65,000. Releveling runs $5,500 to $9,500. Underpinning runs $30,000 to $80,000-plus reflecting the additional engineering and approval complexity.

Inner-western and Port suburbs (Bowden, Hindmarsh, Brompton, Mile End, Thebarton, Torrensville, Port Adelaide, Semaphore, Largs Bay) carry the additional complexity of salt damp combined with stump rot in many older cottages. Pricing typically runs at the upper end of the inner-eastern band, with combined salt damp and restumping scopes running $28,000 to $80,000-plus depending on the cottage size and the extent of remediation required.

Hills suburbs (Stirling, Aldgate, Bridgewater, Crafers, Mt Barker, Lobethal, Hahndorf, Strathalbyn, Mylor) contain substantial stock of older stumped homes including German colonial cottages, mining-era homes, and Victorian and Edwardian residences. Pricing typically reflects the access premium of 10 to 25 percent, with reactive clay soil conditions adding 15 to 30 percent for the Class M, H1, and H2 site classifications common in the foothills. Full restumping in the Hills typically runs $20,000 to $55,000 for standard work and $35,000 to $80,000-plus for heritage replica.

Regional SA Pricing

Regional SA pricing for restumping reflects the smaller local trades market, the additional travel time, and the local mix of older housing stock. The table below summarises typical pricing across the main regional centres.

The Barossa Valley, Clare Valley, and Burra heritage corridor warrant specific mention because of the substantial heritage cottage stock requiring restumping work. Tanunda, Angaston, Nuriootpa, Lyndoch, Clare, Auburn, Mintaro, and Burra all contain significant clusters of 1840s to 1900s German colonial, Cornish mining, and pastoral homesteads where heritage restumping work fits the original architectural character. Specialist heritage restumping operators in these regions typically charge premium rates ($90 to $150 per hour) reflecting the specific skills, the council heritage approval coordination, and the integration with related heritage trades.

Eyre Peninsula and the Far North carry travel premiums on restumping work because most engineering and specialist materials are concentrated in Adelaide. Some regional centres (Mt Gambier, Murray Bridge, Port Lincoln) maintain local restumping specialists with reasonable capacity for residential work. For very remote sites, the freight cost on concrete stumps and engineering services can become a significant proportion of the total project cost; some homeowners in remote regions find that engaging a metro-based specialist with accommodation costs is more economic than waiting for limited regional capacity.

What to Look For in a Quote

A quality restumping quote in SA itemises the inspection findings (stump count, condition, recommended scope), the proposed scope (full restumping, partial, releveling, underpinning), the stump material and engineering specification, the footing pad design, the connection bracket specification, the lift schedule and target floor levels, the inclusion or exclusion of structural engineering and council approval costs, the disruption expectation including any vacate requirement, and the warranty period on the work. Quotes that are vague about these elements should be sent back with a request for itemised assumptions.

Engineering and approvals are the most common point where quotes differ in scope. Quality builders typically include the structural engineering fee and council approval coordination in their quote (or specify these as separate items priced explicitly). For underpinning work, the engineering is non-negotiable; an operator who proposes to proceed without engineering is creating immediate safety risk and exposing the homeowner to enforcement action. Asking specifically about the engineering and approvals scope at quote stage flushes out the position; quality operators name the engineer they will use and provide example documentation from previous projects.

Stump material and quality specification matters for the long-term reliability of the restumping work. A quote that specifies "concrete stumps" without confirming the supply source, the stump size, or the engineering rating allows the operator to substitute lower-grade stumps where the engineering requires premium specification. Asking for the specific stump supply and the engineering rating in writing is reasonable; quality operators specify "150 mm reinforced concrete stumps with 400 mm x 400 mm x 200 mm reinforced footing pads to AS 2870" and similar precise descriptions.

Lift schedule and target levels should be specified at quote stage rather than determined ad hoc during the work. The quote should reference the existing floor level survey, the target final levels, and the planned lift increments. Quality operators discuss the lift approach with the homeowner before the work begins, allowing the homeowner to understand what will happen and to identify any specific concerns (existing artwork or fixtures that may be affected by structural movement during the lift). Vague language about "bringing the floor back to level" without specifying the target levels and lift schedule is a warning sign.

Cosmetic remediation expectations should be discussed at quote stage. Lifting a settled home back to level typically opens cracks at cornices and skirting joins, may cause door and window misalignment, and may produce small cracks in plasterboard linings. Quality operators discuss the expected cosmetic remediation at quote stage and may include the remediation scope in the quote or recommend a separate trade for the work. Unexpected cosmetic damage following restumping is a common dispute trigger; addressing the expectations upfront avoids the dispute.

Warranty terms vary by operator and matter for the long-term reliability of the restumping work. Statutory warranty under the Building Work Contractors Act 1995 in SA covers structural work for 5 years and non-structural work for 1 year on contracts above $12,000. Most major restumping projects exceed this threshold. Reputable restumping operators typically offer extended structural warranties (typically 10 to 25 years on the stump installation) reflecting the long service life of quality work. Asking for the warranty terms in writing before booking is reasonable due diligence. The Consumer and Business Services SA licence search is a free way to verify the operator's licence status, and the South Australian Civil and Administrative Tribunal handles consumer-builder disputes where direct resolution fails.

What to Look Out For

Restumping has its share of common red flags worth recognising before committing to a quote. Cash-only operators offering substantial discounts are the most obvious; the cash discount typically reflects the absence of GST registration, public liability insurance, or building work contractor licensing. Reputable restumping operators in SA quote in writing with a GST line, an ABN, and a CBS licence number where applicable.

Quotes substantially below the market range for the specified work are a second warning sign. A "$8,000 fitted full restumping" quote when the typical range is $15,000 to $40,000 generally signals either a missing scope (the operator plans to skip stumps that need replacement, or the engineering is excluded), substituted lower-spec materials, or a deliberate underquote with extras to be added during construction. The cheaper quote often costs more in the end because the inadequate restumping fails within 5 to 10 years and requires complete redoing.

Diagnosing every home as needing full restumping is a category-specific red flag. Some operators default to recommending the largest possible scope regardless of the actual condition because it produces the largest invoice. Quality operators perform genuine diagnosis and recommend the appropriate scope; cheap operators sometimes recommend full restumping when partial work or releveling would be appropriate. Asking for the inspection findings in writing with photographs flushes out the position; a genuine diagnosis identifies specific issues, while a sales-driven quote uses generic language.

Skipping engineering on substantial work is a fourth warning sign. Underpinning, major restumping on reactive clay sites, and any work involving structural alterations require engineering certification. An operator who proposes to proceed without engineering or who waves away the engineering as unnecessary is creating immediate safety risk. Asking specifically about the structural engineer involvement at quote stage is essential due diligence on any restumping project above $20,000 in value.

Pressure to commit immediately on the day of the inspection is a fifth warning sign. Reputable operators provide written quotes that the homeowner can take time to consider and compare; pressure to commit before the homeowner has seen alternatives is rarely about scheduling and usually about avoiding scrutiny. For substantial restumping work, taking 2 to 4 weeks to compare quotes from two or three operators is reasonable due diligence and often surfaces material differences in scope and approach.

Lack of insurance documentation is a final red flag. Quality restumping operators carry $20 million Public Liability insurance and Domestic Building Insurance (Builders Warranty Insurance) covering the homeowner against builder default and defective work. Asking for both insurance certificates before booking is reasonable, and reputable operators provide them on request without hesitation. Domestic Building Insurance is a statutory requirement in SA on residential building work above the indemnity insurance threshold; the absence of this cover on a substantial restumping project is a serious red flag.

Where restumping forms part of a broader major renovation including timber wall framing, roof framing, staircase construction, and finish carpentry alongside door installation, skirting and architraves, cornice repair, and built-in wardrobes, packaging the restumping alongside the broader carpentry typically delivers materially better project outcomes than treating each scope independently. Quality SA builders coordinate these scopes as part of an integrated project plan; restumping is typically the first major structural scope, with the cosmetic remediation and finish work following in sequence. For external structural scopes alongside restumping, see the related guides for deck building, pergola construction, and verandah builders. Post your restumping job on The Quote Yard to connect with SA-licensed restumping operators, builders, and residential carpenters across Adelaide metro and regional SA, or see the general carpentry services guide for broader carpentry context.