Hire a Plumber Blue Mountains NSW 2026 - Costs and Jobs Explained

Hiring a Plumber in the Blue Mountains, Task by Task

Plumbing in the Blue Mountains in 2026 runs from about $160 for a tap repair through to $32,000 for a replacement onsite wastewater system in the valley, and the spread is explained by site conditions alone. How deep the sandstone sits, whether the house is above or below the street, how high up the mountain you are, and whether a machine can reach the work are the four questions that move a mountains quote. Everything below sets out what each task costs and what the plumber is doing for the money.

The tasks sort into four groups up here. Reactive work covers the blocked drain, the burst pipe and the failed hot water unit, with a winter peak the coast does not see. Ground work covers trenching, drainage and anything buried, and it is the category rock makes expensive. Asset work is particular to the mountains, meaning the pumped sewer unit, the static water supply tank and the frost protection you own and maintain. And diagnostic work covers leak detection and camera inspection, which on a rock shelf is the difference between cutting stone once and cutting it twice.

What Plumbing Costs in the Blue Mountains

Work inside a mountains house costs much what the statewide NSW plumbing rates suggest, because a tap is a tap and a toilet suite is a toilet suite. Everything that goes into the ground or onto an exposed wall costs noticeably more, and the reasons for it are geological.

The indoor figures are familiar enough, with a business hours call-out including the first hour at $150 to $300 and $95 to $175 an hour after that. A leaking tap is $160 to $340, a toilet suite replaced is $450 to $1,020, and a mixer swapped on an existing vanity is $240 to $510. The slightly higher call-out against the city reflects travel along a region strung sixty kilometres end to end on a single highway. Ground work is where the mountains assert themselves. Trenching through sandstone runs $320 to $780 a metre against $180 to $340 on the coastal plain, and the variable is not the plumber but whether the rock takes a bucket, a rock hammer or a saw, and whether a machine can get to the line at all. Where a block has no side access at all, the trench is cut by hand with a jackhammer, and that is a day per few metres of trench.

Two cost categories here have no Sydney equivalent. If your house drains through a pressure sewer or pump-out unit instead of falling to the main, you own a pump, and replacement runs $3,200 to $7,400 including the electrical work. If you are on bush fire prone land with a static water supply requirement, you own a tank and a brigade fitting, at $3,400 to $11,000 installed. Neither is optional once it applies, and neither appears on a Sydney price list. Winter adds its own line to the list, since a frost split pipe repaired is $420 to $1,600 depending on whether the break is in an exposed run, inside a wall or under an unenclosed floor, and the preventive work is substantially cheaper. Lagging exposed pipework properly costs $280 to $1,100 depending on the length of the run, and in the upper mountains it counts as ordinary maintenance.

Sandstone and What Trenching Really Costs

Depth to rock is the single most important number in any Blue Mountains plumbing quote that involves digging, and it is the number most often assumed when it should have been established. The mountains are a sandstone plateau, and across much of the built area the rock is within half a metre of the surface, with the soil above it thin and often little more than a sandy veneer over the shelf. That changes the tool and therefore the rate, because soil is dug with a bucket while weathered sandstone has to be ripped or broken with a hammer on a small machine. Solid rock needs a hydraulic breaker, and where the trench has to be neat, deep or close to a structure it needs a rock saw to cut the sides before the middle is broken out. The progression from bucket to saw is roughly a fourfold increase in cost per metre, and nobody can tell which applies from the kerb.

Access multiplies all of that again, because a block where a machine can reach the line means mechanical breaking. A rear courtyard on a tight site, a gully side garden reached by steps, or a trench running between a house and a boundary fence means a jackhammer and a wheelbarrow, and the rock still has to leave the property. Spoil from rock is heavy, bulky and does not compact back into the trench, so most of it is carted away and clean fill is brought in. The practical consequence for a householder is that you should pay for the answer before you pay for the work. A test hole or two at $380 to $900 establishes the depth and condition of the rock along the proposed line, and it converts a quote with a thousand dollar range per metre into one with a defensible figure. On a long run it is the cheapest money in the project, and a contractor who proposes it is telling you they intend to quote properly.

Steep Blocks, Pumped Sewer and Long Service Runs

A large share of Blue Mountains housing sits on blocks that fall away from the street toward a gully, and a meaningful number of those houses sit lower than the sewer they have to discharge into. Gravity cannot solve that, so the solution is mechanical, and a mechanical solution is an asset you own and maintain. Pressure sewer and pump-out systems work by collecting wastewater in a sealed tank on your property and pumping it up to the sewer main. The components are a tank, a pump, a control panel and an alarm, and the whole arrangement depends on a power supply. A pump unit replacement runs $3,200 to $7,400 including the electrical work, and the pump itself has a service life of roughly eight to fifteen years depending on duty and on what has been flushed into it.

The operating discipline matters more than the hardware. These systems are intolerant of wet wipes, fat, sanitary products and anything fibrous, because all of it binds the impeller in a way an ordinary blocked drain never would. They also have a limited holding capacity, which means a power failure gives you hours of capacity and no more before the tank is full. The alarm exists to tell you that, and the single most expensive mistake available to a mountains householder is ignoring a pressure sewer alarm light for a day.

Long service runs are the other slope cost. Where the house sits fifty or eighty metres back and down from the street, the water supply, the sewer connection and the stormwater line all have to travel that distance, much of it through rock. A burst or a blockage halfway along a run like that is a locating exercise before it is a repair, and that is why leak detection on a long steep driveway is worth paying for in place of digging to find it. Access for plant is the constraint nobody thinks about until a pump needs replacing. A tank and pump assembly has to be delivered and lifted into position, and on a steep block reached by steps that may mean a crane, a tracked carrier or a great deal of manual handling. Ask how the unit is getting to the position when you are quoted, because that belongs in the quote as its own line.

Frost, Freezing Pipes and Winter Bursts

The upper Blue Mountains get genuine frosts, and water expands when it freezes. That single piece of physics produces a category of plumbing failure that Sydney plumbers rarely see and mountains plumbers deal with every winter, and it is almost entirely preventable for a fraction of the repair cost. The pipes that split are the ones with air around them. An outdoor tap and its riser, an exposed run on a southern or western wall, a relief line from a hot water unit, pipework in an unenclosed subfloor, and anything in a roof space above an unheated room are the usual casualties. Pipe buried at proper depth or run inside a heated building envelope is generally fine. Copper splits along a seam and plastic tends to balloon and then fail at a fitting.

The cruel part of it is the timing, because a pipe that freezes does not leak while it is frozen, since the ice is blocking its own escape route. It leaks when the thaw arrives, often while nobody is home and sometimes days after the cold night that caused it. That is why the symptom people report is a sudden unexplained leak on a mild morning as opposed to during the freeze, and why a weekender in Blackheath can lose a floor to a frost that happened the previous week.

Prevention is cheap and specific, and lagging exposed pipework with closed cell insulation and weatherproof wrap costs $280 to $1,100 depending on the run. Fitting insulated covers to outdoor taps is a few dollars each, and a seized outdoor tap replaced afterwards is not. Draining and isolating an outside tap for winter costs nothing. For a holiday property, turning the main stop tap off and draining the exposed sections when you leave in May removes the entire failure mode until spring. There is one trap worth naming here, which is that lagging a pipe slows heat loss and does not add heat, so on a long unheated run in sustained sub zero conditions lagging alone can delay a freeze without preventing it. Where a run genuinely cannot be relocated or buried, trace heating with a thermostatic cable is the engineered answer, and it needs an electrician as well as a plumber.

Bush Fire Prone Land and Static Water Supply

Almost the entire built area of the Blue Mountains sits on mapped bush fire prone land, and that has plumbing consequences which are easy to miss until a development application or an insurance review raises them. The requirements attach to the property itself, though a plumber is who satisfies them, and the work falls to a plumber. Where a development or an alteration triggers the bush fire planning provisions, a property may need a static water supply dedicated to firefighting, which is a tank of specified capacity with a fitting the brigade can couple to and a hardstand or access point they can reach. The capacity, the fitting type and the siting are set by the requirement, not chosen, and the guidance sits with the NSW Rural Fire Service. Installed cost runs $3,400 to $11,000 depending on tank size, position and how far the plumbing has to run.

Material selection above ground also changes, because polyethylene and PVC pipework exposed to radiant heat softens and fails, which is a problem if the pipe in question is the one feeding a sprinkler system or a firefighting outlet. In bush fire prone areas exposed pipework serving a fire protection function is metal rather than plastic, and fittings and valves are specified to match. This is the detail most often got wrong on a retrofit done cheaply. Pumps are the other consideration entirely, since a static water supply that relies on mains power is useless in the conditions it exists for, because power commonly fails during a fire. A petrol or diesel pump, or a tank outlet that gravity feeds to a coupling, is what makes the supply actually available. Ask the question while it is being specified, because finding out afterwards is unwelcome.

High Rainfall and Nowhere Level to Discharge It

Katoomba and Blackheath receive substantially more rain than Sydney, and they receive it onto a plateau cut by gullies with houses perched on the slopes between. Getting water off a property here is a design problem, never a plumbing formality, and getting it wrong creates a dispute with a downhill neighbour instead of merely a wet garden. Every property needs a lawful point of discharge for its stormwater, meaning somewhere the water is legally entitled to go. Where the land falls to the street that is straightforward. On a block that falls away from the street toward a gully or toward another property, it is not, and the options are an inter allotment drainage easement where one exists, a charged or pumped system back to the street, or an absorption or dispersal arrangement where the ground and the controls permit it.

Discharging concentrated stormwater onto a neighbour without an easement is the recurring mountains dispute. Roof water collected by gutters and downpipes and then released at a boundary in a single stream is a different thing from rain falling naturally across a slope, and the consequences range from an argument to a civil claim. A stormwater design that identifies the lawful discharge point first is the cheapest insurance available.

Subsoil and seepage work is the mountains speciality that follows from rock. Water moving through the thin soil above the sandstone shelf travels laterally until something stops it, and that something is frequently a retaining wall, a subfloor or a lower level slab. The fix is subsoil drainage at the rock interface, which runs $160 to $420 a metre depending on depth and whether rock has to be cut to achieve a fall. Attempting to waterproof the inside of a wall instead treats the symptom.

Gutters and downpipes carry a larger share of the load here than on the plain, both because of the rainfall and because of the leaf litter from surrounding bushland. Undersized downpipes and blocked gutters put water over the fascia and against the wall, and that presents as a mystery damp patch that gets blamed on plumbing. Roof plumbing sized for mountains rainfall is a different calculation from the suburban default.

Water Pressure, Altitude and Water Hammer

Mains water pressure in the Blue Mountains is not uniform, and the reason is the terrain. A reticulated system holds pressure by elevation, so a property sitting well below the reservoir serving it can see considerably higher pressure than one near the top of the same zone. Across a region with hundreds of metres of relief between villages, that produces real variation street to street. High pressure is not a benefit at all, because it shortens the life of flexible hoses, tap washers and cartridges, stresses appliance inlet valves, wastes water through every outlet and makes water hammer worse on every tap and valve in the house. The remedy is a pressure limiting valve at the meter, which reduces incoming pressure to a controlled figure, and installation runs $280 to $680. Where appliances are repeatedly failing at the inlet or hoses are letting go early, pressure is the first thing to measure.

Measuring it is simple and cheap, since a plumber fits a gauge at an outside tap and reads static and running pressure, which takes minutes and costs very little as part of another visit. A limiting valve already fitted is not a guarantee, because they fail gradually and stop limiting, so a house with a valve installed fifteen years ago and symptoms of high pressure probably has a valve that has quietly stopped limiting. Water hammer is the audible consequence and it has two common causes. The first is high pressure, fixed by limiting it. The second is pipework that is inadequately clipped, so a pipe free to move slams against a joist or a stud, meaning the timber framing behind the lining, when a valve closes quickly. Reclipping accessible pipework runs $180 to $640, and in an older mountains cottage with pipe run through a subfloor it is very often the real answer when pressure had nothing to do with it.

Hot Water Above the Frost Line

Hot water in the mountains has two local constraints that change the sensible choice before cost is considered. The first is that reticulated natural gas does not reach every village, and the second is that an outdoor unit in Katoomba or Blackheath is operating in genuinely cold conditions for part of the year. Where natural gas is not available the practical options are electric storage, a heat pump, solar with a boost, or bottled liquefied petroleum gas, known as LPG, with the ongoing cylinder cost that implies. Replacement runs $1,550 to $2,550 for like for like electric storage, $3,400 to $5,200 for a heat pump before rebates, and $4,300 to $8,000 for solar with electric boost. Gas where it is connected is $2,000 to $3,600.

Heat pumps deserve a careful conversation at altitude. They extract heat from the ambient air, and their efficiency falls as the air gets colder, so a unit rated on a mild climate test will not deliver the same figures through a Blackheath winter. Better units include defrost cycles and cold climate ratings, and the specification worth asking for is performance at low ambient temperature as opposed to the headline efficiency number. A unit that cannot keep up in July means an electric element carrying the load at full cost.

Siting matters for frost as much as for efficiency. An outdoor unit needs its condensate drain run so it cannot freeze and block, and its relief line discharging to a point where ice will not build up across a path. Solar collectors on a mountains roof need frost protection, which is either a drain back arrangement or a glycol loop, because a collector full of water on a minus three morning is a collector about to split. Rebates are worth checking and worth itemising separately, because New South Wales programs and the federal small scale certificate scheme can take a substantial amount off a heat pump or solar installation, and the discount is normally applied by an accredited installer. Confirm the current position through the NSW Government, and insist the rebate shows as its own line, because a single folded figure is one you cannot verify.

Heritage Cottages and What Is Behind the Walls

Katoomba, Leura, Blackheath and Mount Victoria hold a great deal of late nineteenth and early twentieth century housing, and the plumbing inside it reflects every decade since. A mountains cottage that looks original has typically been modified four or five times, and the weak points sit at the junctions between those campaigns of work. Galvanised steel supply pipe is common in anything from before about 1960, and once the zinc has gone the inside of the pipe narrows with iron oxide until pressure at the furthest outlet collapses. It cannot be rehabilitated, so replacement is the only route, and in a cottage with lath and plaster walls, pressed metal ceilings and no cavity to work in, a full repipe runs $5,200 to $15,000. The cost is in the making good, not in the pipe itself.

Cast iron waste stacks turn up in the larger houses and the former guest houses. Cast iron fails from the inside at the invert, so a stack can look sound and be paper thin where it matters, and connecting new PVC to a corroded stack needs a proper transition coupling into material that will hold a joint. Where it will not, a section of stack is replaced at $700 to $2,500. Two heritage specifics are worth naming as well. Lead was used historically for small waste traps and for jointing, and while it is uncommon in supply pipework in Australian housing of this period, any lead component found in a potable water line should be removed and never reused. And where a cottage is individually listed or sits in a heritage conservation area, external work such as a new tank, an outdoor unit or a visible pipe run may need approval, which is a planning question to settle before the plumber starts.

Unsewered Pockets and the Megalong Valley

Most of the Blue Mountains townships along the highway are sewered, but not all of the region is. The Megalong Valley, parts of the Kanimbla and Hartley country beyond the escarpment, and scattered rural residential blocks run their own onsite wastewater treatment, and that is a different set of obligations and costs from a connected property. The system types are the same as anywhere. A septic tank discharging to an absorption trench relies on the soil to finish the job. An aerated wastewater treatment system aerates and disinfects so the effluent can be irrigated to a dedicated area. Each operates under an approval from the local council with conditions attached, and an aerated system generally requires quarterly servicing by a competent person with a report.

Mountains conditions make siting harder than usual, because thin soil over sandstone gives very little depth for an absorption trench to work in, steep ground limits where an irrigation area can go, and high rainfall means the soil is wet for longer, which reduces its capacity to accept effluent. The practical consequence is that a site and soil assessment here, at $1,000 to $2,600, carries more weight than it does on a flat sandy block, and it sometimes concludes that a more expensive system type is the only one that will work. Failure presents the same way everywhere, which is soggy ground, odour or effluent surfacing, and it cannot be cleared like a blocked drain. Replacement runs $14,000 to $32,000 here, at the upper end of the state range, because the excavation is in rock and the application area has to be engineered around slope and shallow soil. Environmental obligations sit with the NSW EPA and public health guidance with NSW Health.

Blocked Drains, Eucalypts and Garden Exotics

Blocked drains in the mountains are overwhelmingly a root problem, and the mountains have two root sources where most suburbs have one. The native canopy supplies eucalypts, angophoras and turpentines with aggressive root systems, and the famous cool climate gardens of Leura, Blackheath and Mount Victoria supply mature exotic deciduous trees planted a century ago directly over the drainage. The mechanism is the same in both cases. Earthenware pipe laid in short lengths with cement joints offers a moisture source at every joint, and roots enter and then thicken until the pipe is choked. Clearing removes the mass without removing the cause, so the cycle repeats on a scale of months to a couple of years. The permanent answer is relining or replacing the affected length so there is no joint for a root to find.

There is a mountains specific complication, and it lies in the repair. Where a drain was laid in rock, it was often bedded in a chiselled channel with minimal cover, and in places the pipe sits directly on sandstone. That makes open excavation to replace it expensive, because the trench has to be cut in rock again, and it makes relining the clearly better option on cost even before the reinstatement of a garden is counted.

The other local cause is displacement. On sloping ground with seasonal wetting and drying, and particularly where fill has been placed to level a building platform, a drain can settle unevenly and develop a belly or an offset joint. Water then stands in the low point and solids accumulate. A camera shows standing water in a pipe that is otherwise intact, and the fix is reinstating the fall in place of clearing anything. Where the blockage sits in the Sydney Water main and not in your house drain, it is their cost and reporting it is free. The mountains are within the Sydney Water area of operations despite the distance from the city, which surprises some people, and the dividing line is generally the boundary trap or the connection point at the property line.

Finding Leaks on a Rock Shelf

A hidden leak in the mountains behaves in a way that misleads people, and the cause is the rock. Water escaping from a pipe above a sandstone shelf cannot soak downward, so it travels sideways along the top of the rock until it finds somewhere to emerge. That means the wet patch can appear a long way from the actual break, and frequently downhill of it.

Start with the meter, because it costs nothing and it answers the only question that matters first. Turn off every tap and appliance and watch the dial. A dial that keeps creeping means water is escaping past the meter and therefore at your expense. Shut the hot water unit off at its own stop tap and read the dial again, because a dial that stops moving has just told you the fault is on the hot side. On a long driveway run this test is what tells you whether to look at the house or at the eighty metres of pipe leading to it.

Professional detection runs $420 to $980 and uses acoustic listening, thermal imaging and tracer gas. Acoustic methods work well on rock, because sandstone carries the sound of escaping water where loose sand would damp it, which makes the mountains one of the easier environments to listen in. The trap is interpreting where the surface water is coming out as where the pipe has failed.

That distinction is worth insisting on in writing. A detection job should produce a marked point on the pipe run, not a marked wet patch, and on a rock shelf those two can be metres apart with a fall between them. Excavating at the wet patch means cutting rock in the wrong place, and rock cut in the wrong place is the most expensive mistake available on a mountains leak. For an unoccupied or weekender property, the meter reading routine does the work no detection equipment can. Read it on arrival and again on departure and write the figures down. A slow leak that would take months to show at the surface through thin soil over rock shows up immediately as a meter that has moved while the house was locked.

Certificates, Warranties and Insurance

The paperwork is the same across New South Wales and it costs nothing if you ask for it while the plumber is still on site. In the mountains there are two additions worth collecting, which relate to bush fire requirements and to pumped sewer systems, because both are assets with obligations attached. Plumbing and drainage work is regulated under the Plumbing and Drainage Act 2011, and notifiable work requires a certificate of compliance lodged by the licensed plumber who carried it out. That document records that the work was done by someone entitled to do it and that it meets the standards, so ask for your copy before the van leaves. If you want to read the duty itself, both the Act and the regulation made under it sit on the NSW legislation website.

The technical benchmark is the Plumbing Code of Australia, Volume Three of the National Construction Code published by the Australian Building Codes Board, which calls up the joint Australian and New Zealand plumbing and drainage standards, the AS/NZS 3500 series, maintained by Standards Australia. Where a static water supply has been installed to meet a bush fire requirement, keep the documentation showing the capacity, the fitting and the siting, because that is what an insurer or a certifier will ask to see. Statutory warranties attach to residential building work under the Home Building Act 1989, running six years from completion for major defects and two years for the rest. A written contract is required above the contract threshold, and home building compensation cover must be taken out by the contractor for residential work above the insurance threshold, with the certificate given to you before you pay a deposit. On a repipe, a pumped sewer installation or a wastewater system replacement, all of which readily exceed the threshold up here, that certificate is not optional.

If the workmanship is wrong, put it in writing and give the contractor a fair chance to come back. Where that gets nowhere, NSW Fair Trading offers conciliation before anything formal, and a home building dispute that still will not settle is decided by the NSW Civil and Administrative Tribunal. Where the argument is instead about a payment, a finance arrangement or an insurance claim connected to the job, the Australian Financial Complaints Authority is the right body, and your consumer guarantee rights under the Australian Consumer Law are explained by the ACCC.

Licence Classes and Checking a Mountains Operator

Plumbing is licensed work and the categories are separate. Plumbing, draining and gasfitting are distinct, and specialist accreditations for backflow prevention testing and thermostatic mixing valve servicing sit on top of them. The question that matters is whether the person holds the category your particular job needs rather than whether they are licensed at all. Verification takes a minute and costs nothing, and the public register maintained by NSW Fair Trading shows the licence number, the categories, the expiry and any conditions, and it is reachable through Service NSW. Confirm the name on the licence matches the name on the quote, because a licensed individual trading under an unlicensed business name creates a problem with your statutory warranty if you later need to rely on it.

The mountains add a second question, which is about capability. Rock work, pumped sewer systems, frost protection and static water supply are all things a competent suburban plumber may simply not have done. Asking how many pressure sewer units someone has replaced, or how they intend to cut a trench through sandstone, is not rudeness. It is the difference between a quote built on experience and one built on optimism.

Safety obligations matter more than usual on this terrain. Trench work in rock still carries collapse and fall risk, pits and sewer chambers are confined spaces, work on steep ground brings fall from height considerations, and cutting or removing asbestos cement pipe or fibro sheeting needs the appropriate asbestos licence. That sits with SafeWork NSW, while disposal of contaminated waste falls to the NSW EPA. Before any excavation, service locations should be obtained through Before You Dig Australia.

What to Look Out For When Hiring a Blue Mountains Plumber

Mountains plumbing disputes have a consistent shape, which is a quote written on coastal plain assumptions meeting a sandstone shelf. The warning signs sit in the assumptions a tradesperson makes silently, not in the figure they quote. Watch first for a trenching price with no stated assumption about rock. Depth to sandstone is the single largest variable in any mountains excavation, and a per metre rate given without saying whether it assumes soil, weathered rock or solid rock is a rate that will move. Ask what the quote assumes and what happens if the rock is shallower than that, and get the answer in writing.

The second is silence about the pumped sewer. If your house sits below the street and discharges through a pressure sewer or pump-out unit, that is central to almost any drainage conversation, and a plumber who has not asked is about to diagnose a gravity system you do not have. The same applies in reverse, where a quote proposes a pumped solution for a block that has adequate fall to the sewer already. The third is a winter repair with no conversation about prevention. A plumber who repairs a frost split pipe in an exposed run and leaves without mentioning lagging, tap covers or isolation has fixed this year and left next year intact. The preventive work is a fraction of the repair cost, and an operator who works up here year round knows that as well as anyone.

Beyond those three, the checks are the usual ones. Quotes with no exclusions listed, since exclusions are where variations come from. A recommendation to excavate and replace drainage bedded in rock when relining would be cheaper and less destructive. Hot water replacement proposed before the element and thermostat have been tested on a unit under eight years old. A heat pump sold on headline efficiency with no figure given for performance at low ambient temperature. And no written answer on who lodges the compliance certificate, which is the cheapest item in the job and the one proving it was lawful.

Getting Quotes You Can Actually Compare

Two mountains plumbing quotes are comparable only when they are pricing the same ground, and the ground here varies more than the work does. Half an hour spent establishing the site conditions before anyone attends is what turns three unrelated numbers into a genuine comparison. Describe the symptom and not your diagnosis, which means what is happening, where, since when, and what makes it better or worse, including whether it started after a cold snap or after heavy rain, because both are diagnostic up here. A plumber told that a wet patch appeared beside the driveway on a mild morning in July has been handed a strong clue about a frost split on a long run. A plumber told you need the driveway dug up has been handed an instruction.

Hand each plumber the same five facts when you call. The village, because travel along the highway is real. Whether the house drains by gravity or through a pump. The decade the house went up, because a mountains cottage and a 1990s brick home hold entirely different pipe. Whether a machine can reach the work area or whether it is barrow and jackhammer. And whether anyone has ever established the depth to rock on the property.

Ask for the quote structured so the assumptions are visible, with labour separated from materials, the rock assumption stated explicitly, the hourly rate named for work beyond scope, the exclusions listed, and the compliance certificate shown as included or excluded. For drainage, ask for the camera inspection and the written report as their own line, since that is the item telling you whether the rest of the quote rests on evidence. Finally, treat the lowest figure with suspicion on anything involving excavation. On a sandstone shelf the cheapest quote is routinely the one that assumed soil, and it will converge on the others the morning the hammer comes out. The quote worth having is the one whose assumptions are written down, because it is the only one anyone can be held to. Collect three, read the exclusions before the totals, and ask the cheaper two to explain whatever the dearest one allowed for that they did not.