Stormwater Drainage Plumbing ACT 2026 - Costs, Blocked Drains, and ACT Regulations

Stormwater Drainage Plumbing in the ACT: The Complete 2026 Guide

Stormwater drainage in the ACT manages the rainfall runoff from roofs, driveways, paths, and garden areas on private property and directs it to either the ACT Government's reticulated stormwater network or to an approved on-site disposal system. The ACT's rainfall pattern is dominated by high-intensity convective storm events in summer and early autumn, with rainfall totals that can reach 50 to 100 millimetres in a matter of hours from a single storm cell. A private stormwater drainage system that is adequate for moderate steady rainfall may be overwhelmed by an intense ACT summer storm, and the resulting overland flow that enters buildings, saturates foundations, or ponds in low areas of the garden is both a structural risk and a property damage risk. Understanding how a property's stormwater drainage system is designed to handle the ACT's peak storm intensities, and what its current condition actually delivers, is important information for every ACT property owner and buyer. For properties where a failed underground stormwater drain has allowed water to saturate a subfloor void and cause a burst pipe from frost expansion in the damp subfloor environment, or where elevated surface moisture has contributed to a concealed water leak or shower leak, the stormwater drainage system condition is a contributing factor in the broader plumbing condition of the property.

The ACT's stormwater drainage context differs from coastal Australian cities in several significant ways. The territory's clay-heavy red soil, derived from the granite and metamorphic basement geology underlying much of the Canberra basin, has a low permeability that limits natural infiltration of rainfall into the ground. On a sloping block in an established suburb, this low-permeability clay soil means that most rainfall becomes overland surface flow within seconds of the soil surface becoming saturated, and the stormwater drainage system must collect and convey this flow before it reaches the building or the adjacent property boundary. On a flat or gently sloping block, the same low-permeability soil creates pooling conditions in any low area of the garden or hard surface, and a stormwater drainage system that is not graded and connected correctly will produce a series of persistent wet areas that damage lawns, garden plants, fencing, and any timber structure in contact with the ground. Our roof and gutter plumbing guide for the ACT covers the first section of the stormwater chain, from the roof catchment surface through the gutters and downpipes to the connection point with the underground stormwater drain system.

ACT Clay Soils and Drainage Behaviour

The red clay soils that dominate the ACT's residential areas, particularly in the inner south suburbs of Griffith, Narrabundah, Red Hill, and Garran, and in the outer suburbs of Kambah, Macgregor, and Calwell in Tuggeranong, have hydraulic characteristics that create specific stormwater management challenges. Clay soils expand when wet and contract when dry, a process called shrink-swell behaviour, and this seasonal volumetric change applies movement forces to any drainage pipe embedded in the clay that, over the course of years, progressively displace the pipe joints, reduce the pipe gradient, and in severe cases crack the pipe wall. The stormwater drainage pipe running through shrink-swell clay beneath a residential property is subject to the same joint displacement forces that affect sewer pipes in the same soil type, and the combination of root infiltration from garden trees and seasonal soil movement creates an underground stormwater system that deteriorates progressively regardless of whether it is being maintained above ground. In the most severely affected inner-south properties, the stormwater pipe condition after 50 to 70 years of service in shrink-swell clay is comparable to the sewer pipe condition documented in our sewer line repairs guide for the ACT, and a CCTV inspection of both systems in the same site visit is an efficient way to assess the full underground drainage condition of an older ACT property in a single assessment.

The shrink-swell behaviour of ACT clay soils also affects surface drainage by changing the micro-topography of garden areas seasonally. A lawn area in a Griffith or Narrabundah property that drains adequately in summer when the clay has contracted and is relatively firm may pool in winter when the clay has expanded and swollen upward, changing the surface gradient and trapping water in areas that previously drained freely. This seasonal variability in surface drainage behaviour means that a drainage assessment conducted in one season may not accurately reflect the drainage performance in the other season, and a property that receives complaints about pooling in winter should be assessed during or after heavy winter rainfall rather than during the summer dry period. The ACT's established inner-south suburb gardens, many of which have mature deciduous trees with aggressive root systems and uneven ground surfaces from years of root movement, present the most complex surface drainage scenarios in the territory. Our blocked drains guide for the ACT covers the root infiltration problem in underground drain systems in these suburbs in detail.

Blocked Stormwater Drains in the ACT

Blocked stormwater drains in ACT properties are most commonly caused by the accumulation of leaf debris, particularly from the deciduous trees that are a defining feature of the ACT's inner-suburb streetscape and private gardens. The plane trees, elms, poplars, liquid ambars, and ornamental cherries that provide the ACT's celebrated autumn canopy deposit enormous volumes of leaf litter in autumn and early winter, and any stormwater drain with a grated inlet that is not regularly cleared will accumulate a debris mat that progressively reduces its flow capacity. A drain inlet that is 80 percent occluded by leaf debris has almost no capacity to accept the flow from an intense summer storm, and the overland flow that backs up behind the blocked inlet spreads across the hard surface or garden area, finding the lowest available outlet which is frequently the building entry or subfloor vent. The seasonal maintenance rhythm for ACT stormwater drain inlets is straightforward: clear all inlets of leaf debris at the end of autumn after the major deciduous leaf fall, and again in spring after the flowering tree petal fall that clogs smaller grated inlets. A property owner who establishes this twice-yearly routine will maintain stormwater inlet capacity year-round at zero cost, preventing the blocked drain emergency that a single heavy ACT summer storm produces when inlets have not been cleared since the previous autumn.

Sediment accumulation in the underground sections of ACT stormwater drains is the second most common blockage cause, and unlike leaf debris at the inlet which is visible and accessible, sediment blockages occur in the underground pipe where they are not accessible without a drain clearing tool or a CCTV camera. The fine silt that washes off clay soil surfaces in ACT storm events is heavier than water once it settles, and any section of underground stormwater pipe where the gradient has reduced below the self-cleansing velocity threshold, either due to original installation at inadequate grade or due to subsequent joint displacement from soil movement, will accumulate a silt deposit over time. A stormwater drain that has not been cleared for five years in an ACT property with clay soil and significant hard surface area typically has silt deposits that reduce the effective pipe bore by 30 to 60 percent, producing a drain that functions adequately in light rainfall but surcharges in any storm of moderate intensity. Our hydro jetting guide for the ACT covers the high-pressure water jetting methods used to clear sediment and debris from ACT stormwater drains without excavation.

Underground Stormwater Drain Repair and Relining

Underground stormwater drains in older ACT properties are typically constructed from concrete spigot-and-socket pipe in 225mm to 375mm diameter, or from earthenware pipe in smaller residential connections. These materials have provided long service in many ACT properties, but the combination of ACT clay soil movement, tree root infiltration, and the significant hydraulic pressure that a large storm event generates in a fully charged stormwater pipe creates failure modes that require either pipe repair or replacement over the life of the system. CCTV inspection of the underground stormwater drain is the diagnostic tool that reveals the actual condition of the pipe interior, identifying joint displacement, cracking, root infiltration, and silt accumulation that cannot be assessed from surface observation alone. For ACT properties in the inner suburbs where the stormwater and sewer underground pipe systems run parallel through the same clay soil and were installed in the same construction period, a combined CCTV assessment of both systems on the same day is a practical and cost-effective approach to understanding the full underground drainage condition, and the results of both inspections inform a coordinated repair or rehabilitation scope rather than separate, sequential project approaches.

Cured-in-place pipe relining is available for ACT stormwater drains in the same way that it is used for sewer pipe rehabilitation, and represents a significant cost saving over excavation and replacement for pipes that have structural integrity despite joint or surface defects. The relining process for a stormwater drain involves hydro jetting to clear the pipe of all debris and silt, CCTV verification of the clean pipe condition, and installation of a resin-impregnated liner that cures against the existing pipe wall to create a new structural pipe inside the old one. The ACT stormwater pipe diameter range of 225mm to 375mm is within the working range of the relining equipment used by established ACT contractors including Interflow and NuPipe, and a competently relined stormwater drain has a design service life of 50 years from the relining date. For pipes that have suffered joint displacement severe enough to prevent the relining equipment from navigating the pipe run, or where the pipe wall has collapsed to the point where there is no host pipe to line against, excavation and replacement is the required intervention. Our pipe relining guide for the ACT covers the relining assessment and process in detail, including the WSA 05 condition grading that determines whether relining or replacement is the appropriate response to a given level of pipe deterioration.

Surface Drainage Solutions for ACT Properties

Surface drainage solutions for ACT residential properties address the water that does not reach the underground drain system because it pools on impermeable hard surfaces or in low areas of the garden before an inlet is reached. The most common surface drainage installation for ACT properties is the linear channel drain, a narrow surface grate set into a concrete or paved surface at a low point, connected to the underground stormwater system via a connection pipe. ACT-specific considerations for channel drain installation include selecting a drain body and grate from a recognised manufacturer such as Stormtech, Humes, or Enviropipes, specifying a stainless steel or heavy-duty polymer grate with a load class appropriate for the application (pedestrian, vehicle, or heavy vehicle), and confirming that the connection pipe to the underground system has adequate capacity for the catchment area it serves. For ACT properties where surface drainage pooling has already caused water damage to the building fabric, our emergency water damage guide covers the immediate and longer-term remediation process, and the combination of surface drainage installation and structural drying represents the complete response to a stormwater-related building inundation event.

For ACT garden areas where the pooling problem is on an unpaved surface, the installation of a catch basin at the low point connected to the underground stormwater system, or the reshaping of the garden surface to create a positive fall toward an existing inlet, addresses the pooling without the need for a hard surface channel drain installation. The surface reshaping approach requires a competent understanding of the existing surface gradients and the drainage network connection points, and should only be undertaken with the involvement of a licensed plumber who can confirm that the proposed drainage path connects to an approved stormwater outlet rather than discharging to the neighbouring property or overland to the street in a way that creates a nuisance. The ACT's residential development code under the planning framework administered by ACT Planning requires that stormwater be managed within the property boundary or directed to the approved network connection point, and creating surface drainage that directs water to an adjacent property is a breach of the development code that the property owner is liable to correct at their own cost. A pre-purchase plumbing inspection that includes an assessment of the surface drainage gradients and the condition of the underground stormwater drain gives the buyer of an established ACT property specific information about the drainage performance, and any drainage defect identified before settlement is a legitimate basis for a price negotiation or a vendor repair requirement.

Soakage Pits in the ACT

A soakage pit is an underground excavation filled with aggregate or fitted with a proprietary soakage cell system, designed to receive stormwater from roof drains and surface drains and allow it to infiltrate gradually into the surrounding soil rather than connecting it to the reticulated stormwater network. Soakage pits are permitted in the ACT under the plumbing and drainage regulations as an alternative to a reticulated network connection, subject to confirmation that the soil conditions at the installation depth are capable of accepting the design infiltration rate and that the soakage pit is located with adequate setback from the building foundation, the boundary, and any underground services. The ACT's clay-heavy soil creates a fundamental challenge for soakage pit performance: clay soil infiltration rates are low, and a soakage pit in clay soil will fill more quickly during a storm than it can drain, producing a temporary storage effect rather than the rapid infiltration that sandy or loam soil provides. The setback requirement from the building foundation is particularly important in ACT clay soil conditions because a saturated soakage pit adjacent to a building foundation exposes the foundation to the same prolonged soil moisture that causes structural movement in ACT clay-founded buildings, and the required setback of 1.5 to 3 metres from the foundation ensures that the soakage pit drainage does not saturate the soil directly in contact with the building structure.

The practical performance of a soakage pit in ACT clay soil depends on the depth of the installation, the presence of any more permeable soil horizons below the clay layer, and the total volume of the pit relative to the catchment area it serves. A licensed ACT plumber designing a soakage pit for a property in Kambah or Calwell where the clay soil extends to considerable depth will calculate the required pit volume based on the roof and paved catchment area, the ACT design storm intensity for the location, and the measured or estimated infiltration rate of the local soil. For properties where the soil conditions do not support an effective soakage pit, the alternative of connecting to the reticulated stormwater network at the nearest connection point is the appropriate design solution, even if it requires a longer connection pipe run to the network entry point. The ACT Environment, Energy and Water Directorate administers the stormwater management policy framework for the ACT, and the ACT Government's guidelines for on-site stormwater disposal provide the design criteria that a licensed plumber must follow when specifying a soakage pit or any other on-site stormwater management system.

ACT Planning and Approval Requirements for Stormwater Works

Stormwater drainage works in the ACT that constitute development, including new connections to the reticulated stormwater network, significant changes to the stormwater management system of an existing property, and any works within a drainage easement, require approval from ACT Planning before construction commences. The approval requirement applies to works that affect the public stormwater infrastructure or that have the potential to increase the peak stormwater discharge from a property to the public network, since increased peak discharge from an individual property contributes to capacity pressures in the downstream network. The licensed plumber engaged for stormwater drainage work that may require approval should advise the property owner on the approval pathway and assist with the technical information required to support the application. For larger-scale works including new estate drainage systems and commercial stormwater management installations, the Standards Australia AS 3500 plumbing and drainage standard and the ACT-specific design requirements published by ACT Planning are the technical framework against which the design is assessed, and the licensed plumber or drainage engineer preparing the design must demonstrate compliance with these requirements as part of the approval submission.

For straightforward maintenance and repair works that do not alter the drainage system's capacity or connection point, such as replacing a blocked underground pipe in-kind or installing a surface drain in a residential garden area that connects to an existing inlet, the approval requirement is typically limited to the licensed plumber's compliance certification under the ACT plumbing code. The distinction between works that require development approval and works that require only plumbing compliance certification is not always immediately obvious, and the property owner should confirm with their licensed plumber before commencing any stormwater work that the scope has been assessed for the appropriate approval pathway. Works within a registered drainage easement on the property's title require written consent from the ACT Government asset manager regardless of the scale of the works, and commencing works in a drainage easement without consent is an offence under the relevant ACT legislation. The Access Canberra construction occupations framework governs the licensing requirements for all ACT stormwater plumbing work, confirming that only licensed plumbers may perform connections and installations in the stormwater drainage system.

Drainage Easements in the ACT

Drainage easements are registered interests on ACT property titles that give the ACT Government the right to access the property to inspect, maintain, repair, and upgrade the drainage infrastructure that passes through the easement area. Many ACT residential properties, particularly in established suburbs where the public stormwater network was designed with easement drainage rather than street-kerb-and-gutter drainage, have easements running through the rear garden area or along one side of the property, typically indicated by a concrete-lined channel, a buried pipe, or a surface depression following the easement alignment. Property owners are not permitted to build structures, plant trees, or place permanent landscaping within the easement area without written consent from the ACT Government, because these encroachments would prevent or obstruct the ACT Government's access rights. Tree plantings within or adjacent to drainage easements that have allowed root infiltration into the easement drain pipe create a situation where the property owner's encroachment has contributed to the damage of ACT Government infrastructure, and the ACT Government may pursue cost recovery from the property owner for the drain repair costs where this can be demonstrated. Our blocked drains guide covers the root infiltration mechanisms and the cost of clearing and repairing root-infiltrated drain systems in established ACT suburb conditions.

The maintenance of drainage easements in the ACT is the ACT Government's responsibility for the public infrastructure within the easement, but the property owner is responsible for ensuring the easement area is free of encroachments and that the access path to the easement is not obstructed. Private stormwater connections that connect to the easement drain are the property owner's responsibility from the connection point back to the property, and a blockage in the private connection pipe that causes surcharge in the easement drain is the property owner's cost to clear and repair. ACT property owners who are unsure of the location and extent of drainage easements on their title should review the property's survey plan and the Certificate of Title, which record all easements affecting the land. When a drainage easement drain surcharges during a storm event and floods the garden or subfloor of an adjoining property, the situation requires an emergency plumber to assess whether the surcharge is caused by a blockage in the private connection pipe or in the public easement drain, since the responsibility and cost allocation depends entirely on where the blockage is located. Our plumbing inspections guide for the ACT covers the importance of identifying drainage easements as part of the pre-purchase due diligence process, since an easement that restricts building or landscaping opportunities has a material effect on how the property can be used and developed.

Roof Drainage Connection to the Stormwater System

The connection of roof drainage to the underground stormwater system in an ACT property is a critical interface between the above-ground roof plumbing and the below-ground drainage infrastructure. The downpipes from gutters discharge to an underground connection point, typically a trapped gully pit or a direct pipe connection to the underground drain, and the condition of this connection determines whether the roof drainage flows freely to the stormwater outlet or backs up and overflows at the connection point during a heavy rain event. A trapped gully pit that is silted to 60 percent of its depth has dramatically reduced surge capacity, and the peak flow from a roof catchment during an ACT summer storm exceeds the gully pit capacity, causing overflow at the gully grate and overland flow across the adjacent hard surface area. Clearing the gully pit of accumulated silt as part of a spring stormwater maintenance visit costs $180 to $280 and restores the surge capacity that heavy ACT summer storms demand, a straightforward investment relative to the cost of building damage from the overland flow that a silted gully produces. Our roof and gutter plumbing guide for the ACT covers the full above-ground stormwater path from roof surface to gutter to downpipe and the gutter sizing and fall requirements that determine whether the above-ground roof drainage system can keep pace with ACT storm rainfall intensities before the flow even reaches the underground connection point.

ACT plumbing regulations under AS 3500 require that all roof drainage from a residential building be connected to an approved stormwater disposal system before the building is occupied, and any modification to the roof area, gutter layout, or downpipe arrangement that materially changes the stormwater discharge point or volume must be assessed for compliance with the existing stormwater system capacity. An extension that adds a new roof section and creates a new drainage catchment area must have its stormwater discharge connected to the stormwater system in a way that does not exceed the capacity of the existing pipes. For ACT properties in Gungahlin and Molonglo Valley where the block gradients and stormwater system were designed as part of a comprehensive estate-level drainage plan, modifications to individual allotment stormwater connections must be compatible with the estate drainage design. Our roof and gutter plumbing guide for the ACT covers the roof plumbing design requirements and the gutter and downpipe sizing that determines the peak flow delivered to the stormwater connection point.

Stormwater Drainage Costs Across ACT Suburbs in 2026

Stormwater drainage costs in the ACT are influenced by soil conditions, access, and the age of the underground infrastructure. Inner-north and inner-south properties with older concrete or earthenware drain systems in clay soil have higher inspection and repair costs than newer properties in Gungahlin or Molonglo Valley with modern uPVC stormwater infrastructure. The suburb pricing table below reflects the ACT trades labour rates across the eight standard suburb groups for the most common stormwater drainage tasks. For comparison with other ACT trade work, our leaking tap guide and water pressure guide publish comparable suburb-by-suburb pricing tables that reflect the same ACT trades labour rate structure. For properties requiring full underground drain excavation and replacement rather than CCTV inspection and relining, the cost range of $1,800 to $4,500 or more reflects the machine excavation cost for ACT clay soil, the shoring requirement for any trench exceeding 1.5 metres in depth under the WorkSafe ACT confined space and excavation safety requirements, the pipe supply and installation, and the trench reinstatement including compaction and surface restoration.

Stormwater Drainage in New ACT Developments

New residential developments in Gungahlin, Molonglo Valley, and the continuing Tuggeranong estate releases are built under ACT Planning development approvals that specify the stormwater management system for the estate, including the reticulated stormwater pipe network, the water sensitive urban design measures, and the connection requirements for individual allotments. The estate stormwater network is designed to manage the peak runoff from the entire estate catchment area at the design storm intensity, and individual allotment connections must be made at the designated connection point and at the approved discharge rate for that allotment. An individual property owner who installs additional impervious surface areas such as a new shed, driveway extension, or paved outdoor area is increasing the stormwater discharge from the allotment beyond the design assumption, and this additional discharge contributes to peak flow increases in the estate drainage network that compound across all properties. The cumulative effect of multiple properties in a new ACT estate adding impervious area beyond the design assumptions can cause the estate stormwater network to reach capacity at storm intensities that were originally designed to be managed without surcharge, creating overland flow and potential building inundation that was not present when the estate was first developed, a condition that requires a catchment-level drainage assessment and potentially coordinated infrastructure upgrades by the ACT Government rather than individual property-level solutions.

Water sensitive urban design measures, including raingardens, bioretention swales, and permeable paving, are increasingly specified in new ACT estate designs as a condition of the development approval, and these measures are part of the stormwater infrastructure that the property owner is responsible for maintaining in functional condition. A raingarden or bioretention swale that has become compacted, weed-infested, or blocked at its outlet pipe ceases to perform its design infiltration and treatment function and simply becomes a ponding area that may discharge more polluted runoff than a conventional paved and drained surface. The ACT Government's water sensitive urban design guidelines, administered through ACT Environment, Energy and Water Directorate, provide the maintenance requirements for these measures, and the licensed plumber engaged for stormwater maintenance work at a property with water sensitive urban design measures should be familiar with the outlet pipe maintenance requirements for these systems. Our commercial plumbing guide for the ACT covers stormwater management for ACT commercial and mixed-use developments where the water sensitive urban design requirements and the drainage network capacity obligations are substantially more complex than for residential allotments.

Commercial Stormwater Drainage in the ACT

Commercial and institutional properties in the ACT have stormwater management obligations that extend beyond the residential framework, including the requirement to treat stormwater before it enters the public network to remove hydrocarbons, gross pollutants, and suspended solids from large car parking and hardstand areas. The ACT Environment Protection Authority administers the environmental licence conditions for commercial operations that have the potential to discharge polluted stormwater, and a licensed commercial plumber working on an ACT commercial property's stormwater system must be aware of the trade waste and environmental licence obligations that apply to that site. Gross pollutant traps and hydrocarbon interceptors in commercial stormwater systems require regular maintenance, and a blocked or full pollutant trap that allows gross pollutants or hydrocarbons to bypass into the public stormwater network is a licence breach with enforcement consequences under the ACT Environment, Energy and Water Directorate regulatory framework. The Fyshwick, Mitchell, Hume, and Beard industrial precincts in the ACT have a high concentration of commercial operations with stormwater treatment obligations, and the licensed plumbers and drainage contractors operating in these areas are typically experienced in the inspection, maintenance, and replacement of gross pollutant traps and coalescing plate hydrocarbon interceptors that form the treatment chain between the property hardstand and the public stormwater network connection point.

The stormwater drainage infrastructure for ACT commercial properties including retail centres, office buildings, and industrial estates in Fyshwick, Mitchell, Hume, and Beard is typically larger diameter than residential infrastructure, serving larger catchment areas and discharging to the public network at flow rates that require ACT Government approval. Licensed commercial plumbers engaged for stormwater work on these sites should be familiar with the ACT Government's network protection requirements, the capacity and condition assessment obligations for large-diameter stormwater drains, and the spill containment requirements that apply to sites with fuel storage, chemical handling, or food processing operations. Our sewer line repairs guide for the ACT covers the complementary wastewater infrastructure that parallels the stormwater system on commercial ACT sites, including the trade waste approval requirements that apply when commercial process water enters the sanitary sewer rather than the stormwater network. For commercial properties where a comprehensive plumbing inspection is required, including the stormwater drainage system condition assessment, the inspection report provides the documented baseline for the maintenance programme and supports asset management planning for the building's infrastructure.

Getting Stormwater Drainage Quotes in the ACT

When seeking quotes for stormwater drainage work in the ACT, confirm that the licensed plumber has assessed the complete drainage system rather than quoting only for the visible or accessible symptom. A blocked stormwater drain that is cleared without a CCTV inspection of the downstream pipe will recur if the underlying cause is root infiltration, pipe collapse, or silt accumulation in the underground section beyond the clearance point. Requesting a CCTV inspection as part of the initial quote scope, or as a follow-on quote after the initial clearance, provides the information needed to assess whether a maintenance-only response is appropriate or whether a structural repair is indicated. A quote that arrives as a lump sum without specifying the extent of the pipe to be inspected, the diameter and material of the drain to be relined, or the connection point details for a new drain installation gives the property owner no basis for comparison against a second quote, and the lowest lump sum figure is not necessarily the most economical outcome if the scope is more limited than the competing quotes. The Australian Competition and Consumer Commission consumer guarantee provisions confirm that all licensed stormwater plumbing services in the ACT must be performed with due care and skill, and the ACT Civil and Administrative Tribunal provides the dispute resolution pathway for stormwater work disputes that cannot be resolved directly with the contractor.

Confirm that the stormwater drainage plumber is familiar with the ACT drainage easement consent requirements and can advise on whether the proposed work requires ACT Planning approval before commencing. A plumber who begins drainage easement work without the required consent exposes the property owner to enforcement action and the cost of reinstating the easement to its pre-works condition. For new drainage connections, ask the plumber to confirm the connection point location and the approved discharge point before any excavation is authorised, as connecting to the wrong outlet or to a pipe of inadequate capacity can create stormwater surcharge problems that are expensive to correct after the fact. The WorkSafe ACT framework applies to all drainage excavation work, particularly for trenches exceeding 1.5 metres in depth which require engineered shoring. The Australian Competition and Consumer Commission consumer guarantee provisions apply to all licensed stormwater plumbing services in the ACT, confirming that work must be performed with due care and skill. For properties where water damage has already occurred from a failed stormwater system, our emergency water damage response guide for the ACT covers the immediate response and insurance claim process that follows a stormwater-related inundation event.