Pool Leak Repair Service Cost WA 2026 - Complete Pricing Guide

Pool Leak Repair Costs in Western Australia for 2026

Two separate bills sit behind every leaking pool and the order they come in decides how much you spend in total. Detection comes first. A dye test with a visual inspection of the shell, the fittings and the waterline is $180 to $400 and suits a pool where the loss is obvious and the suspect list is short. A full detection visit with each line pressure tested, the skimmer and returns isolated and acoustic listening across the surround runs $350 to $750. Either way you finish with a located fault in writing.

Repair pricing then follows directly from the fault that was found. Skimmer boxes, which crack more often than anything else in a Perth pool, come in at $450 to $1,400. A pool light or the conduit behind it is $380 to $1,100. One underground pipe break is $650 to $2,200. A crack through a fibreglass shell is $900 to $3,500 once grinding, laminating and a colour coat are counted, and injecting a structural crack in a concrete shell reaches $1,800 to $6,500. Specialist detection services sit alongside general water leak detection for the house plumbing.

What sets this job apart in Western Australia is the ground. Perth sits on deep sand across most of the metropolitan area, and sand drains. A leak that would raise a soggy patch in a Melbourne back yard within a fortnight will run quietly into the profile here for a year. WA pools are therefore usually found leaking by the water bill and the top-up habit, never by anything visible.

The other local detail worth knowing about is a financial one. The Water Corporation operates a leak allowance that credits up to half the water estimated lost through a concealed leak, but swimming pools, spas, ponds, water features and their fittings are expressly excluded from eligibility. Pool water is therefore paid for in full at the usual tiered rates, with no rebate at the end of it. For the trade itself there is plumbing services, while shell and interior work sits under pool renovation.

How Much Water Loss Is Normal

Every uncovered pool loses water to the air, so the first question is never whether the level drops but whether it drops faster than evaporation alone would explain. Through a Perth summer an uncovered pool typically gives up somewhere between 4 and 8 millimetres a day to evaporation, and a hot dry easterly can push a single day past 10 millimetres. Over a week that is 30 to 55 millimetres off the level, which looks alarming written down and is entirely normal. Wind matters more than temperature here, so a pool on an exposed block in a suburb that catches the afternoon sea breeze loses more than a sheltered courtyard pool at the same air temperature. Through winter the same pool might lose only 1 to 2 millimetres a day.

Splash-out, backwashing and people getting in and out all take water too, and none of it is a fault. A cartridge filter loses nothing to backwashing because it is hosed out instead, whereas a sand or glass media filter sends 200 to 600 litres down the drain each time it is backwashed, which on a 50,000 litre pool is close to a centimetre of level.

A loss that calls for investigation is one that runs beyond about 15 millimetres a day, or one that keeps going through winter when evaporation has all but stopped, or one that suddenly changes. Winter is the honest test month in Western Australia. If the level still falls noticeably in July the water is going somewhere other than the sky. Before paying anybody at all, run a bucket test on the pool. It takes two days, costs nothing, and the result is the single most useful thing you can hand a leak technician, because it converts a vague worry into a measured rate.

What the Lost Water Costs in WA

Topping up a leaking pool is not free, and the Western Australian billing structure makes a sustained leak more expensive than owners expect. Scheme water in Perth is charged on a rising block tariff, so each extra kilolitre a household uses is billed at a higher rate than the one before it. A pool leak adds its volume to the top of your annual consumption, which means it is charged at your highest step, not your average. A pool losing 15 millimetres a day beyond evaporation on a typical 8 by 4 metre pool is giving up roughly 480 litres a day, or around 175 kilolitres a year, and at upper-block rates that is a serious number on top of a bill that already includes a garden.

The Water Corporation reported in 2025 that close to 15 per cent of Perth homes have a leak on any given day, with the average leak losing just over 9 litres an hour, and that nearly 19 billion litres of scheme water is lost from residential properties across the region each year. Taps, toilets, hot water systems, air conditioners and garden reticulation were the common sources. A leaking pool sits outside that list and is usually larger than any of them.

Here is the part of it that catches people out. The Water Corporation leak allowance will credit up to 50 per cent of the water estimated lost through a genuinely concealed leak, provided the repair is done within 60 days by a licensed plumber or an approved Waterwise Garden Irrigator and the claim is lodged within six months of the repair. The policy then specifically excludes leaks in a swimming pool, spa, pond, water feature and their related fittings. A pool leak is not claimable, full stop.

That exclusion changes the maths on paying for a detection visit. Spending $350 to $750 to find a leak you cannot claim a rebate on is not an optional luxury, it is the cheapest part of the job, because every month of delay is water you will never get credited back. A leak on the house side of the meter is a different story and worth claiming, so if a technician finds the loss is actually in a reticulation line rather than the pool, say so on the application.

Why Perth Sand Hides a Pool Leak

Soil is the reason pool leaks behave differently in Western Australia, and it works against the owner at every stage. Most of the Perth metropolitan area sits on the Swan Coastal Plain, which is deep sand over limestone. Sand has high permeability, so water leaving a pipe or a shell crack travels downward and sideways through the profile. The visual cue that gives away a leak in reactive clay, namely a permanently damp patch of lawn or a paver that never dries, simply does not appear. Owners in the eastern suburbs on heavier soils sometimes do get the wet patch, and those suburbs are one of the few places in the state where the classic symptom shows up.

The absence of a wet patch has a second consequence that is worse than the water bill. Water running through sand carries fines with it, and over months that creates voids under paving, under pool surrounds and occasionally under footings. The first sign for many owners is a paver that rocks underfoot or a section of surround that has dropped a few millimetres, by which stage the leak has been running long enough to move soil. Surround repairs then get added to the bill, which is where pool surround repairs and concrete crack repair come into it.

The limestone sitting under that sand adds a further wrinkle. Where water reaches a limestone layer it can follow natural fissures a long way laterally, so the place a leak surfaces, if it surfaces at all, may be nowhere near the pool. Technicians working Perth pools rely on pressure testing and acoustic listening instead of looking for damp ground, precisely because the ground will not tell them anything. There is one upside to all this sand. Excavating to a pipe is quick and cheap in it, so the labour half of a pipe repair in Perth is often lower than the same job interstate. The expensive part here is almost always the hard surface on top rather than the digging underneath.

Leak Detection Methods and Prices

Detection is a sequence, not a single test, and knowing the sequence tells you whether a quote is thorough or hopeful. The cheap end is a dye test with a careful visual inspection, at $180 to $400. The technician drops a concentrated dye near a suspected point with the pump off and the water still, then watches whether the dye is drawn in. It works well on shell cracks, skimmer throats, light niches and around returns, and it is honest about its limits: a dye test cannot see into buried pipework and it cannot find anything while water is moving.

A full detection visit at $350 to $750 adds pressure testing. Each line is isolated at the equipment pad, plugged at the pool wall and charged with air or water to a set pressure, and a line that will not hold pressure has a break in it. The technician then narrows the position along that line acoustically, listening through the surround for the hiss of escaping air. On a pool with suction, return, cleaner and solar or heater lines, that is five or six separate tests, which is why the visit takes half a day.

Two further tools turn up on harder jobs. Thermal imaging across a surround can pick the temperature anomaly where water is moving under a slab, which is most useful on a heated pool in winter. A pressure sensor left on a line overnight will catch an intermittent leak that holds up under a twenty minute test but weeps for hours, and these are the ones owners find most frustrating because the pool only loses water some weeks. What you should get at the end is a written location, a description of the fault and a repair recommendation, not a verbal "it is probably the skimmer". Ask whether the detection fee is credited against the repair if the same contractor does both, because many will credit part of it and some will credit all of it.

Skimmer Boxes, the Usual Culprit

More Western Australian pool leaks start at the skimmer box than at any other single point, and the reason is structural rather than careless. A skimmer box is a plastic or fibreglass moulding set into the pool wall at water level, with the shell on one side and the surround concrete on the other. Those two things move independently of one another. The shell flexes slightly with water load and temperature, the surround moves with the ground beneath it, and the skimmer is bonded to both. In sand that settles unevenly, that joint is the first thing to open. The crack usually appears where the skimmer throat meets the shell, right at the waterline, which also happens to be the hardest place to see.

The tell is a pool that drops to just below the skimmer mouth and then stops. Water escaping through a cracked skimmer throat can only go while the level is high enough to reach the crack, so the pool self-levels at the fault and holds there. Owners often describe this as the pool fixing itself in winter, when really the level has just found the leak.

Repair cost depends on whether the box can be patched or has to come out. A crack in the throat or a failed joint between the box and the shell can often be ground back and relaminated or filled with a pool-grade epoxy such as a Selleys or Sika two-part product, at $450 to $900. A split body or a box that has pulled away from the surround means cutting out the surrounding concrete, removing the old box, fitting a new one and reinstating the paving or coping, at $900 to $1,400 and sometimes more if the coping is a discontinued tile. One warning belongs here about cheap fixes. Silicone smeared into a skimmer crack from inside the pool will hold for a season at best, because the joint is still moving and silicone has no structural strength across a flexing crack. If somebody offers that as a repair while you wait for a proper booking, ask what they expect it to last.

Pool Lights and Conduit Leaks

A pool light is a hole deliberately cut in the shell with a sealed fitting in it, so it is a leak waiting for its seal to age. The light sits in a niche moulded or cut into the wall, and the cable leaves the niche through a conduit that runs up to a junction point above water level. Water escapes at one of three places: the gasket between the lens and the body, the joint between the niche and the shell, or the conduit entry itself. The third is the one owners never guess, because water travels up the conduit and leaves at the far end, often into the garden bed beyond the coping with nothing visible at the light at all.

Diagnosis follows the same self-levelling logic as the skimmer. A pool that falls to the top of the light and stops has told you where the fault is. Dye testing around the niche with the pump off confirms it in minutes.

Pricing for this work runs $380 to $1,100. Replacing a lens gasket on an accessible fitting is the bottom of that range. Resealing the niche to shell joint sits in the middle. Repairing or replacing a leaking conduit run is the top, because it may mean lifting coping or paving to reach the conduit. Older halogen fittings are increasingly being changed to LED while the pool is open, since it is already drained to the light and a Spa Electrics or Aqua-Quip LED replacement cuts running cost substantially.

This is work with an electrical component and it is not a job for an unlicensed handyman. Electrical work in Western Australia requires a licensed electrical contractor, and pool and spa wiring has its own clearance and equipotential bonding requirements under the wiring rules. Building and Energy administers that licensing, at the Government of Western Australia. Dedicated pool lighting repairs cover the fitting itself and electrical services cover the circuit behind it.

Underground Pipework and Valves

Quotes for a buried pipe leak vary more widely than for anything else on a pool, and the variation is almost entirely about what has been built over the pipe. A typical Perth pool has a suction line from the skimmer and main drain, two or more return lines, often a dedicated cleaner line, and sometimes solar or heater flow and return. All of it is PVC pressure pipe, usually 40 or 50 millimetre, glued at every joint and buried a few hundred millimetres down. Failures happen at glued joints that were dry-fitted or under-primed on installation day, at points where the pipe has been loaded by something built over it later, and at tree root pressure points.

The signature a pipe leak leaves behind is useful. A pool that loses more water with the pump running points at the pressure side, which is the returns, because those lines are only pressurised when the pump is on. A pool that loses more with the pump off points at the suction side or the shell, since the suction line holds a static head when the pump is idle. That one observation from the owner can halve the testing time.

Cost is $650 to $2,200 for a single break and the spread is the surface. In an open garden bed or lawn, excavating in Perth sand, cutting out the damaged section, fitting a repair coupling and backfilling is a morning and sits at the bottom of the range. Under a liquid limestone or exposed aggregate surround it means saw cutting, breaking out, repairing, compacting and then reinstating a decorative finish that will show where it was patched. Under a slab, a patio or a retaining wall, rerouting the line around the obstacle is often cheaper than reaching the break.

Where the pipe run is old and has given trouble more than once, ask about rerouting the whole line. A new line laid in an accessible route costs more today and removes the next three callouts. Related work sits under emergency plumbing when a break is flooding, and concreting services handle the reinstatement.

Leaks at the Equipment Pad

The cheapest leak to fix is the one you can see, and the equipment pad is the one place on a pool where water shows itself honestly. Pumps, filters, chlorinators, heaters and valves all sit on a slab somewhere near the pool, usually in a pump enclosure. Every one of them has threaded joints, unions, lid seals and O-rings that wear. A pump lid O-ring that has gone hard will leak air in while the pump runs and water out while it is off. A multiport valve with a worn spider gasket sends a steady trickle down the backwash line, which many owners run to a soakwell where nobody ever looks at it.

Check the pad first, every time, before paying for detection. Run the pump and look for spray or a weep at every union. Switch it off and look again, since some leaks only appear under static pressure. Feel the underside of the filter housing and the heater connections. Then watch the backwash outlet for a minute, because a continuous trickle there is a gasket and not a pool fault at all.

Repairs here are inexpensive at $150 to $600. O-rings, lid seals, union seals and valve gaskets are consumables, and genuine parts for the common Australian brands such as Astral Pool, Onga, Waterco, Davey and Pentair are readily available in Perth. A seized or weeping pump seal is $220 to $480 fitted. A cracked filter housing or a split multiport body is a replacement job. The cost steps up at that point, and pool pump and filter repairs take over.

Heated pools deserve an extra look at this stage. Gas heaters and heat pumps add a flow and return pair plus a heat exchanger, and a pinholed exchanger will lose water steadily while the heater runs and nowhere else. If the loss tracks your heating schedule rather than your pump schedule, the heater is the suspect, and pool heater repairs are the right call.

Fibreglass Shells and Flex Cracks

Fibreglass dominates Western Australian pool building because sand excavates easily and a one-piece shell can be craned in and backfilled in days, so most leak work in this state happens on a fibreglass pool. A fibreglass shell is a laminate with a gelcoat surface, and a small amount of flex is built into it. Problems start when it flexes more than it was meant to, which in Perth usually traces back to backfill. Sand that was placed without compaction settles, the shell loses support in one area, and the laminate takes bending stress it was never laid up for. Cracks then appear at the stress concentrations, so they turn up at step corners, at the bench, around fittings and along the join between the floor and the wall.

Not every crack in a fibreglass pool leaks. Gelcoat crazing is a shallow pattern of fine lines in the surface coat only, caused by age, heat cycling and chemistry, and it is cosmetic. A structural crack goes through the laminate, tends to be a single line or a star, not a pattern, and will take dye. Distinguishing the two is the first thing a competent technician does, because resurfacing crazing on a sound shell is a large bill for no water saving.

A genuine laminate repair runs $900 to $3,500. The pool is drained to below the damage, the crack is ground out to a vee, new glass is laminated in with a vinylester or polyester resin, then it is faired, sanded and finished with a colour-matched flowcoat. Matching a twenty year old shell colour exactly is not realistic, so expect a visible repair unless the whole surface is being redone. Where several cracks are present or the gelcoat has failed broadly, a full interior reline at $6,500 to $18,000 becomes the better value option and that is pool resurfacing and renovation territory.

A sequencing trap sits in this work and it catches people. Repairing the laminate without addressing the void that caused it means the shell keeps flexing and the repair cracks again, often within a year. A proper quote on a settled pool includes stabilising the backfill, usually by pressure grouting the void behind the shell, and a repairer who does not mention the cause is quoting the symptom. Brands commonly installed across WA include Barrier Reef, Leisure Pools, Aqua Technics and Narellan, and most will advise on the laminate schedule for their own shells.

Concrete Shells and Structural Cracks

Concrete pools are the minority in Perth but they dominate the premium and the older end of the market, and their leaks are structural problems rather than maintenance ones. A concrete pool is sprayed or poured reinforced concrete with a waterproof render, pebble or tile interior. The concrete itself is not watertight; the interior finish and the waterproofing behind it are. So a leak in a concrete pool means either the interior finish has failed or the shell has cracked through. Hairline shrinkage cracks from the original cure are common and often harmless. A crack that runs corner to corner, steps across the floor to wall junction, or has opened wide enough to see into is a different matter.

Ground movement is the usual cause and in Western Australia it comes from two directions. Where there are clay bands beneath the sand, seasonal shrink and swell loads one end of the shell. On limestone, dissolution features and uneven rock can leave a shell partly on rock and partly on sand, which is the worst support condition there is. Engage an engineer before repairing any crack wider than about a millimetre or any crack that has moved since it was first noticed.

Repair at $1,800 to $6,500 normally means injection. The crack is cleaned and ported, then a polyurethane or epoxy resin is injected under pressure to fill the full depth, and the interior finish is made good over the top. Polyurethane stays flexible and suits a crack that is still moving. Epoxy is rigid and structural and suits a crack that has stabilised. Choosing the wrong one is why some injected cracks reopen, so ask which resin is proposed and why.

Interior finish failure is a separate and larger job. Where render has debonded or pebble interior has lost its matrix across large areas, the water is passing through the finish and not through a crack, and the answer is a full interior resurface at $8,500 to $24,000 depending on size and finish. Products from Baumit, Mapei and Ardex are common in the Perth market for pool render and waterproofing systems. Tile and waterline work falls under pool tile and surface repairs, and waterproofing services cover the membrane behind it.

Groundwater, Hydrostatic Pressure and Popping

Hydrostatic pressure, meaning the upward push of ground water against the underside of a pool, matters more in Western Australia than in any other state, and ignoring it has destroyed pools. Large parts of coastal Perth sit over a shallow superficial aquifer, and in some suburbs the water table is within a metre or two of the surface, rising further after a wet winter. A pool is a buoyant box sitting in that ground. Full of water it is heavy enough to stay put. Drained, the water pressure beneath it can lift it, which is called popping or floating the shell, and it ruins a fibreglass pool and cracks a concrete one.

That is why the single most important question on any repair that needs the pool emptied is whether this site can be emptied at all. A pool builder who proposes draining a pool in Scarborough, City Beach, Rockingham or anywhere else on a low coastal block in August without first checking groundwater is proposing to risk the shell. The checks are not exotic: a test hole beside the pool, an inspection of the hydrostatic relief valve in the floor if one was fitted, which is the one-way valve meant to let ground water in rather than let the shell lift, and a look at the bore and reticulation behaviour on the property.

Where groundwater is high the work is done differently. Dewatering with a wellpoint or spear pump holds the table down while the pool is empty, and that adds $600 to $2,500 to a job depending on how long the pool must stay dry. Alternatively the repair is staged with the pool only partly lowered, an approach that works for skimmer, light and waterline work but not for a floor crack. Some repairs are deliberately done in summer purely because the table is lower.

Hydrostatic relief valves deserve a mention because they are what protects a concrete pool during draining and they are also a known leak source. The valve sits in the pool floor and is meant to open inward if outside pressure exceeds inside pressure. When the seat corrodes or grit holds it open, it leaks continuously, and because it is on the floor under the main drain cover, nobody ever looks at it. Any detection visit on an older concrete pool should include checking it.

What to Check Before You Pay Anybody

A weekend of patient observation will often narrow a pool leak to one of three areas, and that narrowing saves real money when you ring a technician. Start with the bucket test to establish the rate, because everything else is interpretation without it. Then run the comparison test: measure the drop over 24 hours with the pump on its normal cycle, then over another 24 hours with the pump switched off completely. More loss with the pump running points to the pressure side pipework. More loss with it off points to the suction line or the shell. Equal loss either way points to the shell or a fitting at a fixed height.

Next, let the pool find its own level. Stop topping up and note where the fall stops. A level that settles just under the skimmer mouth, at the top of a light, at a step nose or at a return fitting has identified the height of the leak for you, and height narrows the suspect list faster than anything else. A pool that keeps dropping past every fitting is losing water through the floor or a buried line.

Then walk the perimeter and look at the ground rather than the water. Even in sand, a long-running leak sometimes leaves a clue: a paver that rocks, a slight dish in a liquid limestone surround, a garden bed that stays greener than the rest, or a section of coping that has dropped against its neighbour. Photograph anything you find with something in frame for scale.

What not to do is add a leak sealing product to the water as a first move. Those products work by being drawn into a small void and setting there, and on a genuine hairline they occasionally succeed. On anything larger they fail, and in the meantime they can partly block a cartridge filter, foul a chlorinator cell and make dye testing unreliable for weeks afterwards. If you want to try one, do it after a detection visit has ruled out pipework, not before. Routine chemistry and servicing is pool cleaning and maintenance work.

Licensing, Contracts and WA Thresholds

Western Australia regulates building and trade work differently from the eastern states, and pool repair sits across several licence types. Building work is regulated by Building and Energy, which operates under the Department of Local Government, Industry Regulation and Safety and has a Building Commissioner and a Director of Energy Safety as its statutory officers. Many owners and even some trades still refer to the old Building Commission or to the department that preceded the current one, so if a contractor quotes you a registration under a body that no longer exists, check the number against the current register rather than taking the paperwork at face value.

Three thresholds govern the paperwork on a pool repair in this state. Fixed-price residential building work from $7,500 to $500,000 needs a written home building contract. Work that requires a building permit and exceeds $20,000 triggers home indemnity insurance, whose deposit-loss cover stops at $40,000. A builder may take no more than 6.5 per cent of the contract price as a deposit. Those figures differ from New South Wales and Victoria, so do not rely on advice written for another state.

In practice most pool leak repairs fall below $7,500 and therefore below the written contract requirement, which does not mean you should accept a verbal agreement. Get the scope, the price, the reinstatement and the warranty in writing anyway. A full interior resurface or a major structural repair will cross $7,500 and sometimes $20,000, at which point the contract and insurance obligations bite and the contractor must be registered.

Trade licensing runs alongside building registration and is separate from it. Plumbing work on the pressure side and any connection to scheme water requires a licensed plumbing contractor. Electrical work on lights, pumps and bonding requires a licensed electrical contractor. Neither licence is a building registration and a contractor may hold one without the other. Consumer rights on the work itself, including the statutory guarantees that apply regardless of what a warranty document says, are enforced by the Australian Competition and Consumer Commission. The regulations behind all of this are published at Western Australian Legislation.

Perth Metropolitan Pricing

Perth has the deepest pool trade in the state by a wide margin, and the competition shows up in detection pricing more than in repair pricing. Within roughly 30 kilometres of the city centre there are enough dedicated leak detection operators that a detection visit is competitively priced, and several will credit the fee against the repair. Repair rates are steadier because they are driven by materials and by the hard surface over the fault more than by competition. A pool with a generous grassed surround in Canning Vale costs less to repair than an identical fault under a travertine surround in Cottesloe, and the difference is reinstatement, not labour.

Three sub-markets behave differently inside the metro area. The western coastal suburbs combine high groundwater with expensive hard landscaping, so drained repairs there carry dewatering costs and careful reinstatement. The eastern suburbs sit on clay bands and see proportionally more structural cracking and more genuine wet-patch symptoms. Pools in the northern and southern corridors are mostly under twenty years old, where the common faults are skimmer joints and settled backfill rather than aged interiors.

Callout structure varies between operators, so ask about it. Some operators quote a flat detection fee that covers the metro area, others add a travel component past a radius, and a few charge an hourly rate with a minimum. For a straightforward job the flat fee is usually better value, and for an awkward intermittent leak the hourly operator may actually be cheaper because they stop when they find it. For broader pool work across the metro area, pool installation covers new builds and swimming pool construction the structural side.

Regional Western Australia Pricing

Distance changes pool repair pricing in this state more than any technical factor, because the detection specialists are concentrated in Perth and most of them travel. The South West from Bunbury through Busselton to Margaret River has its own pool trade and reasonable competition, so expect only a modest loading. Albany and the Great Southern are thinner and a detection visit may be bundled with other jobs in the same week, so booking flexibility there can save real money. Geraldton supports local pool servicing but specialist detection often travels from Perth.

Further out the structure changes rather than just the price. In the Pilbara, the Kimberley, the Goldfields and the remote Wheatbelt, a specialist visit usually means travel time, accommodation and a day rate, and the sensible approach is to batch the work. Get the detection, the repair and anything else the pool needs done in one mobilisation, because a second trip costs nearly as much as the first. Expect 40 to 100 per cent above metropolitan rates once travel is in.

Materials behave differently in the heat as well. Resins, gelcoats and flowcoats have working temperature ranges, and a Pilbara summer is outside the comfortable range for laminating work, which pushes drained repairs in the north towards the cooler months. That is the opposite of the Perth preference for summer work on groundwater grounds, so the right season depends entirely on where the pool is. Owners a long way from a town should consider what maintenance can be handled locally between specialist visits. A local handyman or pool servicer who can replace an O-ring, check the backwash valve and read a pressure gauge will catch the cheap faults before they need anybody to fly in, and handyman services cover that level of work.

What to Look Out For in a Pool Leak Quote

Pool leak repair attracts a particular kind of vague quoting, and the warning signs are consistent enough to list. The first red flag is a repair quoted without a detection result behind it. If nobody has pressure tested the lines and somebody is offering to replace the skimmer box, they are selling you their best guess. It may even be the right guess, but you are paying for a repair with no evidence and no recourse if the pool keeps losing water afterwards. Insist on a located fault in writing before authorising excavation.

The second is a quote that does not separate reinstatement. Lifting and relaying pavers, patching liquid limestone, matching exposed aggregate or replacing coping can be half the invoice on a pipe repair, and a single lump sum hides whether you are being charged fairly for either part. Ask for excavation, repair and reinstatement as three lines, and ask plainly whether the patch will be visible, because on a decorative surround the honest answer is yes.

The third warning sign concerns repairs that need the pool drained. Any quote that involves emptying the pool should say what the groundwater situation on your block is and what happens if the table is higher than expected. A contractor who has not raised this in coastal Perth has not thought about the job. Likewise a quote for a fibreglass laminate repair that says nothing about the void or settlement that caused the crack is quoting the symptom, and you will see the same crack again.

The fourth warning sign covers cause and warranty together. Ask what the contractor believes caused the fault, and ask what warranty covers the repair and whether it covers recurrence at the same point. A repair warranty that excludes recurrence is close to worthless on a leak. Also ask whether the detection fee is credited, since that is often negotiable and rarely offered unprompted.

The last is registration. Check the number on the Building and Energy register, not a business card or a website, remember that a plumbing or electrical licence is not a building registration, and keep any deposit at or below the 6.5 per cent maximum that applies in Western Australia. Technical standards referenced in pool work are published through Standards Australia and the national construction provisions through the Australian Building Codes Board. Where the surround itself needs rebuilding, that is pool surround repair work, and glass barriers around the pool sit under glass pool balustrade repairs.