Hire a Plumber Sydney NSW 2026 - Costs and Jobs Explained

Hiring a Plumber in Sydney, Task by Task

Plumbing in Sydney in 2026 runs from about $140 for a tap washer through to $14,000 for a full supply repipe, and the spread inside that range comes down to the site. The same symptom in two houses four suburbs apart can be two completely different jobs, because the pipe in the wall is a different material and the drain in the yard is a different age. Everything below sets out what each task costs, what the plumber is actually doing for the money, and which questions change the answer.

The tasks divide into four groups. There is reactive work, which is the blocked drain, the burst pipe and the failed hot water unit, and it accounts for most calls. There is planned work, which is renovation rough-in and fit-off, appliance connection and fixture replacement. There is compliance work, which is backflow testing, tempering valve servicing and certificates. And there is diagnostic work, which is leak detection and camera inspection, and which is the cheapest money you will spend if the fault is hidden.

What Plumbing Costs in Sydney

Sydney plumbing prices divide into two groups that behave nothing alike, and the statewide picture in our NSW plumbing services guide flattens that difference out. Work inside the house is largely predictable, because the plumber can see what they are dealing with before quoting. Work in the ground is not, because the fault is hidden until something is dug up or a camera goes down the line. Almost every Sydney plumbing dispute traces back to a quote given for the first category when the job turned out to belong to the second.

For inside work the figures hold reasonably steady across the city. A leaking tap reseated or a cartridge replaced runs $140 to $320 including the call-out. A toilet suite removed and replaced sits at $420 to $980 depending on whether the floor flange and the pan connector are still sound. A mixer swapped on an existing bathroom vanity is $220 to $480. These are an hour or two of labour plus the fitting, and a plumber who has seen a photograph can price them over the phone within a narrow band.

Work in the ground is where the spread opens up. Clearing a blocked drain with an electric eel is $280 to $480. The same blockage cleared with a high pressure water jetter and then camera inspected is $420 to $750, and the camera is the part worth paying for, because it tells you whether you have just bought a clear drain or a six month reprieve. If the camera finds a collapsed section, you have moved into pipe relining at $390 to $850 a metre or open excavation at $240 to $520 a metre, and the quote that cleared the drain tells you nothing about either.

Hot water is the single largest unplanned plumbing expense most Sydney households meet. A failed thermostat or element on an electric storage unit is $280 to $620. A full replacement runs $1,450 to $2,400 for like for like electric storage, $1,900 to $3,400 for gas, and $3,200 to $4,900 for a heat pump before any rebate. The gap between repair and replacement is wide enough that a plumber who reaches for replacement without testing the cheap components first is worth questioning.

The two figures that catch people out are the after-hours loading and the parking problem. A call-out that costs $180 at two in the afternoon on a Wednesday costs $220 to $480 at nine on a Saturday night, and some firms bill a minimum two hours on top. Across the inner ring, where metered parking and permit zones are the norm, the first thirty to forty minutes of a job can be spent finding somewhere legal to leave a van full of tools. Neither is a rort, and both belong in the quote, where you can see them before the work starts.

How Sydney Plumbers Actually Charge

There are three charging models in use across Sydney and they are not interchangeable. Understanding which one you are being quoted under is the difference between comparing two prices and comparing two unrelated numbers. The traditional model is a call-out fee that includes the first hour, then an hourly rate after that. This suits diagnostic work and small repairs, and it is the fairest structure when nobody yet knows what is wrong. The risk sits with you, because an hour that becomes four is an invoice that quadruples. Ask for the hourly rate in writing and ask to be told when the job passes two hours.

The fixed price model quotes the whole job up front, often from a published price book. Larger firms with branded vans and dispatch centres work this way. The risk sits with the plumber, which is why the figure sits higher than the hourly equivalent would have been on a straightforward job and lower on a difficult one. It is the better structure for defined work such as a hot water changeover or a toilet replacement, where there are few surprises. The third model is quote after inspection, where a nominal attendance fee buys a diagnosis and a written price, and the fee is credited against the work if you proceed. For anything underground this is the only honest approach, and a plumber offering it for a drainage problem is telling you they intend to find out what is wrong before pricing the fix.

Blocked Drains and Why Sydney Blocks So Often

Blocked drains are the most common plumbing call in Sydney and the most commonly mispriced. The symptom is identical whatever the cause, which is a gurgling floor waste or a toilet that will not clear, and the cause determines whether you are spending three hundred dollars or thirteen thousand. In suburbs built before about 1960, the house drain is almost always earthenware, which is fired clay pipe laid in short lengths and jointed with cement mortar. Every joint is a weak point, because tree roots find moisture there and grow into the pipe, and the root mass then catches everything that passes. This is the classic inner west, inner south and north shore blockage, and it recurs on a cycle of months to a couple of years because cutting the roots out does not stop them regrowing. The permanent fix is relining or replacing the damaged length.

In suburbs built from the 1970s onward the drain is PVC with solvent welded joints, which roots cannot penetrate. A blockage there is nearly always something introduced, and the usual suspects are wet wipes, cooking fat, sanitary products and in older western suburbs the occasional collapsed section where the pipe was laid over fill that has since settled. These clear properly and stay clear, which is why a plumber who tells you a 1990s drain needs relining should be asked to show you the camera footage.

Price follows method and access, so an electric eel at $280 to $480 cuts through a soft blockage and is enough for a fat or paper obstruction. A high pressure jetter at $420 to $750 scours the pipe wall and is what roots require. A drain camera inspection adds $180 to $420 and is the only way to know which you needed. If your property has no accessible boundary trap or inspection opening, the plumber has to work through a floor waste or lift a gully, and that adds an hour.

One Sydney specific complication is worth knowing before you call. Where the blockage is in the Sydney Water main rather than your house drain, it is their responsibility and their cost, not yours. The dividing line is normally the boundary trap or the connection point at the property line. Establishing which side the fault sits on before digging can save you the entire bill, and reporting a main sewer blockage to Sydney Water costs nothing.

Hot Water Repair and Replacement in Sydney

Hot water units fail on a schedule that is reasonably predictable, and knowing roughly where yours sits in its life changes whether repair or replacement is the better spend. An electric storage cylinder lasts eight to fifteen years in Sydney water, gas storage ten to fifteen, continuous flow gas fifteen to twenty, and a heat pump is still establishing its record but is generally rated to fifteen. A unit at year four is worth repairing. The same fault at year thirteen is not.

Four components account for most repair calls, and on electric storage they are the element and the thermostat, at $280 to $620 fitted, and the sacrificial anode, at $340 to $680, being the rod that corrodes so the cylinder does not. On gas it is the thermocouple or the gas control valve, at $320 to $780. A tempering valve, which limits bathroom outlets to fifty degrees and is mandatory on new installations, is $280 to $520 to replace and is a common cause of lukewarm water that gets blamed on the whole unit. A leaking cylinder is not repairable, because once the inner tank has corroded through, water appearing at the base or a relief drain running constantly means the unit is finished, and any plumber who offers to patch it should be declined. Replacement runs $1,450 to $2,400 for like for like electric storage, $1,900 to $3,400 for gas storage or continuous flow, and $3,200 to $4,900 for a heat pump before rebates.

Relocation is the cost nobody budgets for, and where the old unit sat inside a cupboard or under the house and the replacement has to move outside for ventilation or clearance, you are paying for new water lines, a new gas run or a new circuit, a slab or bracket, and a new relief drain to a lawful discharge point. That adds $600 to $2,200 on top, which is why a straight swap of the same type in the same position is nearly always the cheapest compliant option, even when a different technology looks better on paper. New South Wales rebates and the federal small scale certificate scheme can take a meaningful amount off a heat pump or solar installation, and the discount is normally applied by the installer at the point of sale. Eligibility and amounts change, so confirm the current position through the NSW Government and ask the plumber to show the rebate as a separate line on the quote, because a single discounted figure is one you cannot verify.

Reading Your Pipework From the Age of the House

Sydney housing stock spans roughly a hundred and sixty years, and the water supply pipe inside the walls changed material three times across that span. The era of your house tells a plumber what they will find before they cut anything, and it tells you which problems are coming. Houses built before about 1960 were plumbed in galvanised steel. The zinc coating protects the steel for decades and then stops, after which the inside of the pipe grows a layer of iron oxide that narrows the bore. The symptoms are falling pressure at the furthest outlet, brown water on the first draw in the morning, and pinhole leaks that appear at threaded joints. Galvanised pipe cannot be rehabilitated, so replacing the supply pipework in a three bedroom Sydney house runs $4,800 to $14,000 depending on wall type and how much of it has to be chased into brick.

From the 1960s to the late 1990s the standard was copper, which is a far better outcome. Copper lasts fifty years and often longer, and when it does fail it goes at one discrete point. The exception worth knowing is where copper was run in direct contact with concrete or with dissimilar metals, because that produces localised corrosion that a leak detection job will find under a slab. Current practice is cross linked polyethylene, usually called PEX, run in continuous lengths with crimped fittings and far fewer joints. It is flexible, it tolerates freezing better than copper, and it is quick to install, which is why a repipe in PEX costs less than the same job in copper. On the sewer side the eras matter just as much, with earthenware before roughly 1960, a transitional period of earthenware and cast iron stacks, and PVC from the 1970s.

Sewer Repairs, Relining and Open Excavation

Once a camera has shown the drain to be damaged and not merely blocked, the decision is between relining the existing pipe and digging it up. Both are legitimate, and the cheaper choice depends on how much pipe is affected, how deep it is and what is sitting on top of it. Relining installs a resin saturated liner inside the existing pipe and cures it in place, forming a new pipe within the old one. It is done through an existing access point, so nothing is excavated, and it is the obvious answer where the damaged length runs under a driveway, a slab, a paved courtyard or a mature tree you want to keep. Sydney pricing runs $390 to $850 a metre with a typical minimum charge of around $2,400, and junction reinstatement adds $380 to $750 for each branch that has to be cut back open.

Open excavation is the answer where the pipe has fully collapsed, where sections have offset so badly that a liner cannot pass, or where the run is shallow and in open lawn. At $240 to $520 a metre it is cheaper per metre than relining, but that figure assumes a machine can reach the trench. In an inner city back yard reached only through the house, the same work is dug by hand and the labour component triples.

There is a third option that gets overlooked. Where the fault is a single cracked or root invaded joint within a couple of metres of an access point, a short patch liner or a spot repair at $1,200 to $2,800 fixes the actual defect without relining the whole run. If forty metres of relining is quoted for a problem the camera located at the four metre mark, ask for the scope to be justified on the footage. Before any excavation on a Sydney property, the service locations have to be obtained, because gas, electricity, water and telecommunications all share the same verge and front yard. The free referral service at Before You Dig Australia is the starting point and a contractor who skips it is gambling with your money and their licence. Where the work is near a Sydney Water sewer main, their own asset information and approval process applies on top.

Gas Fitting, Appliance Work and Leak Repairs

Gas work is a separate licence from plumbing and the two do not automatically travel together. A plumber may hold a plumbing licence without gasfitting, which means the tradesperson who can replace your hot water cylinder is not necessarily permitted to connect the gas to it. Asking which licences someone holds before they attend avoids a wasted call-out fee.

Appliance connection is the most common job, and connecting a cooktop, an oven, a gas heater or a gas hot water unit to an existing point runs $320 to $890, and the price depends far more on pipe sizing than on the appliance. Every gas installation has a total load, and adding an appliance to a system already running at capacity means upsizing the run back towards the meter, and not simply teeing off the nearest line. New gas points cost $480 to $1,600 depending on distance from the meter and what the pipe has to pass through. Running a line from a front meter box to a rear alfresco kitchen in an established Sydney house means either going under the floor, through a roof space or around the outside in a sleeve, and in a slab on ground house the options narrow sharply. Anyone quoting a rear gas point without looking at the subfloor has not priced the job.

Gas leaks are an emergency and the sequence matters. Turn the gas off at the meter, open doors and windows, do not operate switches, and leave the building if the smell is strong. For a leak you can smell outside near the meter or in the street, the gas distributor attends free of charge, because the network up to and including the meter is theirs. Past the meter it is your installation and your gasfitter, and a leak test with a manometer plus repair runs $280 to $880.

Bathroom, Kitchen and Laundry Plumbing

Renovation plumbing splits into two visits that are priced separately, and understanding the split prevents the most common renovation billing surprise. The rough-in happens after demolition and before waterproofing, when the pipework is set into the walls and floor. The fit-off happens at the end, when the tapware, the pan and the vanity go on. Between them sit the tiler and the waterproofer, and a plumber cannot control that timetable.

A full bathroom rough-in and fit-off in Sydney runs $3,800 to $9,500. The lower end is a like for like replacement in a timber framed house where the fixtures stay in the same positions. The upper end is a reconfigured layout in a brick or slab on ground house, where moving a toilet means a new floor penetration, a new connection to the stack and a core hole through a suspended slab at $320 to $680 each. Kitchens are cheaper because the fixture count is lower. A kitchen rough-in and fit-off is $1,200 to $3,400, with the variables being whether the sink moves, whether a dishwasher point is being added, and whether a filtered or boiling water tap needs a dedicated supply and a power point coordinated with the electrician. Laundries are $900 to $2,600 and the common extra is relocating a floor waste.

Two Sydney specifics add cost in older housing. Where the existing stack is cast iron, connecting new PVC to it needs a proper transition coupling in place of an adapted fitting, and the cast iron itself is often too corroded at the connection point to take a joint, which means replacing a section of the stack. Where the bathroom is on a suspended timber floor over a shallow subfloor, the plumber may be working on their back in a space with under half a metre of clearance, and that is an hourly rate job. The item most often left out of a renovation plumbing quote is the temporary disconnection and reconnection work between trades, along with the compliance certificate at the end. Ask whether the quote covers capping off during demolition, attending twice, commissioning the fixtures and lodging the certificate, because four separate line items turning up as variations is how a $4,000 quote becomes a $5,500 invoice.

Strata and Apartment Plumbing in Sydney

Roughly a third of Sydney households live in strata, and in strata the question of who pays comes before the question of what it costs. Getting that order wrong is how residents end up personally funding repairs to common property that the owners corporation was always liable for. The general division is that pipework serving more than one lot is common property, and pipework serving only your lot is yours. In practice that means the vertical stacks, the main water riser, the common sewer line and the pipework within the structural walls and slab belong to the owners corporation. Your tapware, your toilet suite, your flexible connections, your hot water unit if it sits inside your lot, and the branch pipework from the stack to your fixtures are generally yours.

This matters financially because the two routes have different costs and different timetables. A common property repair is commissioned by the strata manager, often from a contractor already on a maintenance schedule, and you do not pay directly. A lot owner repair is yours to organise and fund. Where a leak in common property has damaged your lot, the owners corporation ordinarily repairs the source and the building insurance may cover the resulting damage.

The emergency case is the one worth planning for. A burst flexible hose under a vanity at two in the morning floods your unit and the ones below it, and in that moment nobody is reading the strata plan. Shut the water off at your own isolation valve if you have one, call the after-hours number on the strata notice board, not the first result in a search, and photograph everything before anything is removed. Flexible connection hoses have a service life of around five years and replacing a pair at $180 to $420 is the cheapest insurance in a Sydney apartment.

Access is the other strata cost, and where the fault is in a stack the plumber may need entry to the units above and below yours, which takes days to arrange through a strata manager. Where the building has a concierge, a loading dock booking and a lift protection requirement, the plumber is billing for the time that process takes. A contractor who works in strata regularly prices that in, while one who does not will add it later.

Sydney Water Assets, Approvals and Backflow

Sydney Water owns the mains, the sewers and the connection points, and a number of its sewer mains run through private back yards instead of down the street. If one crosses your property, it changes what you can build, where you can dig and which approvals a plumber needs before starting.

The first step on any project involving excavation, a new structure or work near a drainage line is to obtain the asset information for the property, which shows the location and depth of the sewer and water mains. Where work is proposed over or near an asset, an approval is required and may bring conditions such as a specific footing design, a minimum clearance or supervision during excavation. These are routine when identified at design stage and expensive when discovered by a machine. Connection work is separate again, because a new water or sewer connection, a disconnection, a meter installation or a tapping into the main is Sydney Water work carried out by accredited providers, with the cost set by their schedule and not by your plumber. For a development that creates new lots or substantially increases demand, a section 73 certificate is required and that process runs on its own timetable, which is frequently the longest lead item in a small Sydney development.

Backflow prevention is the recurring compliance cost most property owners meet. A backflow device stops contaminated water being drawn back into the drinking water supply, so where a property presents a medium or high backflow hazard rating, which covers most commercial premises and some residential situations with irrigation, fire services or rainwater connections, a testable device is required and must be tested every twelve months by a plumber holding backflow accreditation, at $145 to $320 a device. Water usage disputes and complaints about the utility itself have their own avenue. Where a bill, a meter reading or a service issue cannot be resolved with Sydney Water directly, the Energy and Water Ombudsman NSW handles complaints for customers of participating water providers at no cost. Plumbing workmanship disputes are a different matter and go elsewhere, which the compliance section below sets out.

Emergency and After-Hours Plumbing

The after-hours premium is real, it is large, and a surprising proportion of calls made at midnight could have waited until morning for a fraction of the emergency call-out price. Knowing which category your problem falls into is worth several hundred dollars.

Only three situations are genuine emergencies, the first being a burst pipe or a failed flexible hose actively flooding the building, because every minute adds to the damage bill and the water has to be stopped. A gas leak you can smell inside, for obvious reasons. And a sewage overflow inside the building or into a living area, because that is a health hazard and not an inconvenience, while everything else on the list is urgent at worst. A blocked drain that still partially drains, no hot water, a dripping tap, a running toilet or a slow leak into a drip tray are all next morning jobs. The after-hours call-out at $220 to $480 plus a minimum billing period, against a daytime call-out at $130 to $280, is a difference of several hundred dollars for work that will be done no better at two in the morning. If you can isolate the fixture and live without it overnight, do that.

The single most valuable thing a Sydney householder can do is find the main stop tap before they need it. It is usually at the water meter near the front boundary, sometimes in a garden bed, occasionally under a cover that has been paved over. Turn it to check it actually works, because a seized stop tap discovered during a flood is its own emergency. In an apartment, find your in-lot isolation valve instead, which is normally in the laundry or a service cupboard.

When you do call out of hours, ask three questions before agreeing to attendance. What is the call-out fee, what is the minimum billing period, and will the work be a permanent repair or a temporary make safe. A legitimate answer to the third is frequently make safe tonight and return in business hours, and that is the cheaper and better outcome, because a permanent repair done properly in daylight beats one improvised by torchlight.

Finding a Leak Without Demolishing the House

A leak you cannot see is the most anxiety inducing plumbing problem and the one where the diagnostic spend most clearly pays for itself. The alternative to paying for detection is paying for exploratory demolition, and tiles removed on a guess are tiles you buy twice.

The first test costs nothing at all, so turn off every tap and appliance in the house and then watch the water meter. If the dial is still moving you have a leak on your side of the meter, and the rate of movement gives a rough sense of scale. Then close the stop tap to the hot water unit and watch again, because that single step separates a hot water side leak from a cold water one and halves the search area. Professional detection uses acoustic equipment to listen for the sound of escaping water through slab and soil, thermal imaging to find temperature differences where warm water is tracking, and tracer gas introduced into the line and detected at the surface where it escapes. A detection job runs $380 to $920 and should produce a marked location, not a general area. The repair is separate and depends entirely on what the detection finds.

Under slab leaks are the Sydney worst case and the most common in houses built from the 1970s onward where copper was run in the slab. Repair options are breaking through the slab at the located point, at $1,400 to $3,800 including making good, or abandoning the in-slab run and rerouting the pipe through the roof space or around the perimeter at $1,200 to $3,200. Rerouting is often the better value because it removes the failure mode instead of patching one instance of it. Shower leaks are the most frequent false alarm, because water appearing in an adjoining room beside a shower is far more often failed waterproofing or perished grout and silicone than a broken pipe, and that is a waterproofer and tiler problem in place of a plumbing one. A regrout and reseal at $380 to $1,100 is the first thing to try, and any plumber who proposes opening a wall before testing the shower base has skipped a step.

Certificates, Warranties and Insurance

The paperwork attached to plumbing work in New South Wales is what you rely on if something goes wrong years later, and it costs nothing extra at the time if you ask for it while the plumber is still on site. Chasing the same paperwork once the job is closed and paid is considerably harder. Plumbing and drainage work in New South Wales is regulated under the Plumbing and Drainage Act 2011, and notifiable work requires a certificate of compliance to be lodged by the licensed plumber who did it. That certificate is the record that the work was done by someone entitled to do it and that it complies with the standards, so ask for your copy before the plumber leaves. The legislation and the current regulation are available through the NSW legislation website if you want to read the obligation itself.

The technical standard the work is measured against is the Plumbing Code of Australia, which forms Volume Three of the National Construction Code published by the Australian Building Codes Board, and it calls up the AS/NZS 3500 series of plumbing and drainage standards maintained by Standards Australia. You will not need to read either, but a plumber citing a clause when explaining why something has to be done a particular way is generally telling you the truth. Residential building work carries statutory warranties under the Home Building Act 1989, which run for six years for major defects and two years for everything else from completion. Written contracts are required above a 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. A contractor who will not provide that certificate on a job above the threshold is a contractor to decline.

When workmanship goes wrong the escalation path is defined. Raise it in writing with the contractor first and give them the opportunity to rectify. If that fails, NSW Fair Trading provides a complaints and dispute resolution service, and unresolved home building disputes are heard by the NSW Civil and Administrative Tribunal. For problems with a payment, a finance arrangement or an insurance claim connected to the work, the Australian Financial Complaints Authority is the relevant body, and consumer guarantee rights under the Australian Consumer Law are explained by the ACCC.

Licence Classes and How to Check One

Plumbing is licensed work in New South Wales and the licence is not a single undifferentiated thing. There are separate categories, and holding one does not confer the others. The practical consequence is that the right question is not whether someone is licensed but whether they are licensed for this particular job. The main categories are plumbing, draining and gasfitting, and they can be held individually or together. Specialist accreditations sit on top, including backflow prevention testing, thermostatic mixing valve servicing and in some cases work on fire services. A tradesperson may also hold a contractor licence, which permits them to contract directly with you, or a qualified supervisor certificate or tradesperson certificate, which permits them to do the work under someone else holding the contractor licence.

Checking a licence takes about a minute and is free. The public register maintained by NSW Fair Trading shows the licence number, the categories held, the expiry date and any conditions or disciplinary history, and it is reachable through Service NSW. Check the name on the licence matches the name on the quote, because a licensed individual working under an unlicensed business name creates a problem with your statutory warranty. Safety obligations run alongside the licensing, since work in a sewer pit or a deep trench is confined space and excavation work with its own requirements, and cutting or removing asbestos cement pipe or sheeting requires the appropriate asbestos licence depending on the material. Both sit under the workplace safety regime administered by SafeWork NSW, and waste disposal obligations for contaminated material fall to the NSW EPA. A contractor proposing to cut old fibro or AC pipe without raising any of this is cutting corners you will not see.

What to Look Out For When Hiring a Sydney Plumber

Most plumbing complaints in Sydney are not about dishonesty. They are about a vague scope meeting an unpredictable site, and the warning signs show up in how someone quotes, not in what they charge. The first warning sign is a drainage price given over the phone with no camera and no inspection. Nobody can see a buried fault from a description of a gurgling floor waste, so a confident fixed figure for a blocked drain is either padded to cover the worst case or destined to become a variation. The honest version of that conversation is a clearing price plus a camera, then a quote for whatever the footage shows.

The second is the full reline recommended immediately after a clear. If the drain is now flowing and the pitch is for forty metres of relining, ask to see where the defect sits on the footage and how many metres are actually affected. Spot repairs exist and they are a fraction of the cost. Anyone who cannot point at the defect on screen has not justified the scope.

The third is replacement proposed before the cheap components have been tested. A hot water unit that has stopped heating has a thermostat and an element worth a few hundred dollars, and on a unit under about eight years old those should be tested first. Replacement is the right answer on a leaking cylinder or an old unit and the wrong answer on a four year old one with a failed element.

Beyond those three, the practical checks are mundane ones. Quotes with no exclusions listed, because the exclusions are where the variations come from. Deposits above a modest proportion of the job for ordinary repair work, since a plumber does not need half the money up front to buy a tap cartridge. No written scope at all for work running into thousands. Pressure to decide while the tradesperson is standing in your hallway. And nobody willing to say in writing who lodges the compliance certificate, which is the cheapest item in the job and the one that proves it was done lawfully.

Getting Quotes You Can Actually Compare

Two plumbing quotes are only comparable if they describe the same work, and in Sydney they frequently do not. The effort that makes comparison possible happens before anyone attends, and it costs you nothing but twenty minutes. Write down the symptom and not your diagnosis. What is happening, where, since when, and what makes it better or worse. A plumber told that the rear toilet gurgles when the washing machine drains and that it started three weeks ago has been given a genuine clue about a partially blocked main drain. A plumber told you need your drain relined has been given an instruction, and will price the instruction as given.

Then give every quoting plumber the same four facts. The age of the house, because that determines pipe material. Whether there is vehicle access to the work area, because that determines whether it is machine or hand labour. Whether the property is strata or freestanding, because that determines who commissions the work. And whether you have found a boundary trap or inspection opening, because that determines how the plumber gets into the drain.

Ask for the quote in a structured form, with labour separated from materials, the hourly rate stated for any work beyond the quoted scope, the exclusions listed explicitly and the compliance certificate named as either included or excluded. For drainage, ask for the camera inspection and the written report priced as their own line. Quotes set out that way are easy to compare and difficult to argue with later, and that is precisely the point.

Finally, resist judging on the lowest figure alone. On an inner Sydney drainage job the cheapest quote is often the one that has assumed the easiest possible cause, and it will converge on the others once the camera goes down. The quote worth taking is the one whose assumptions are written down, because that is the only one you can hold someone to. Collect three, read the exclusions first, and ask the two cheaper ones to explain anything the dearest one included that they left out.