Laundry Renovations: Scope, Costs and What Gets Specified Wrong Before Work Starts
Pick the cabinetry before the drainage fall is confirmed, and the floor won’t drain. Lock in the tile spec before waterproofing is on the programme, and the renovation that looks correct on completion starts failing quietly behind the substrate. These are not edge cases. They are the predictable outcome when a laundry renovation brief starts at the finish layer and works backwards.
Most laundry briefs have the sequence inverted. Finishes are chosen — tiles, tapware, cabinetry — before anyone has confirmed what the substrate looks like, where the drainage fall needs to go, or whether the wet area triggers AS 3740 waterproofing requirements. The tradesperson who arrives last discovers the gap. The homeowner funds the fix.
This is not a criticism. Renovation sequencing is not intuitive, and the people selling tapware are not obligated to explain wet area compliance. But the cost of getting it right at the brief stage is substantially lower than the cost of finding it out during demolition.
Here is what to know before the brief goes to a specialist.
What a Laundry Renovation Actually Covers
Most laundry renovation conversations start in the wrong place. Finishes — tiles, tapware, cabinetry handles — are visible and easy to discuss. The decisions underneath them are not visible and rarely get asked about at the quoting stage. Those decisions determine whether the renovation holds up or whether it starts producing problems in the first year of use.
A laundry renovation has four scope layers, and most quotes that come in too low are missing at least one of them.
Services: Plumbing rough-in — hot and cold supply, waste connection, drainage rough-in. These go in first and determine where everything else is positioned. Relocating plumbing after cabinetry is installed is one of the more expensive mid-project corrections a brief can produce.
Substrate and waterproofing: Where the laundry floor is a wet area, AS 3740 waterproofing applies. The substrate — compressed fibre cement sheet in a wet area, not standard plasterboard — needs to be correct before any tile or flooring goes down.
Fixtures and cabinetry: Tub, benchtop, cabinetry run, tapware. The visible layer most briefs start with — but one that needs the two layers above confirmed before it can be specified correctly.
Finishes: Splashback, flooring, painting. Decided last, because they follow from everything above them.
A renovation brief that starts at layer three and works backwards is how scope gaps get built in from the start. The fix for a drainage fall problem discovered during tiling is not cheap. The fix for a waterproofing membrane that was not installed correctly is more expensive still — and harder to access. Neither is difficult to prevent at the brief stage.
Related: Before specifying tiles or flooring in a laundry wet area, confirm your waterproofing requirements. See our AS 3740 waterproofing compliance guide ›
The Six Scope Layers of a Laundry Renovation
The six cards below are the scope layers any complete laundry renovation brief should address. A quote that compresses all six into a single line item has made assumptions about at least one of them — usually the ones that require licensed tradespeople and compliance sign-off.
Hot and cold supply, waste connection, drainage rough-in. Plumbing goes in first and determines where everything else is positioned. Relocating plumbing after cabinetry is installed is one of the more expensive mid-project corrections. If the brief does not confirm supply and waste locations before the cabinet run is specified, it is assuming they will line up. They often do not.
The floor needs to fall toward the waste at the correct gradient. In a wet area laundry, the fall is typically 60mm minimum. This is a plumbing specification confirmed before tiling, not during it. A tiler who sets floor tiles without a confirmed fall specification from the plumber is making a decision that belongs to a different trade.
Where the laundry floor receives direct water contact — from the machine drain, the tub, or floor washing — AS 3740 waterproofing requirements apply. Most laundry floors qualify. A sealed surface finish does not substitute for a compliant waterproofing membrane underneath it. The membrane goes on before the tiles and before the flooring. If it is not in the original quote, it is either missing or bundled into another line item without identification. Both situations are worth resolving before site start, not after.
The cabinetry run determines benchtop depth, overhead storage clearance, and appliance housing. Standard laundry cabinetry sits at 900mm height — though front-loaders under a benchtop often push the finished height to 950mm or above. The layout needs to be confirmed and dimensioned before joinery is ordered, not adjusted after fabrication.
The tub position is fixed by the plumbing rough-in. Tapware specification follows from the tub. Hot and cold supply height and hose length to the appliances should be confirmed at planning stage — a hose that does not reach is a common and entirely avoidable site problem.
Splashback, flooring, wall paint. The most visible layer and the last to be decided — because everything below it has to be right first. Flooring in a wet area laundry should be specified to the same compliance standard as a bathroom floor. Slip rating and water absorption matter here, not just appearance.
What Laundry Renovations Cost in NSW and ACT
Laundry renovation costs vary more than most homeowners expect before they start getting quotes. The range between a finishes-only refresh and a full structural renovation with plumbing relocation and waterproofing is wide enough that a single number does not communicate much. What matters is understanding which scope items the quote includes and which ones it is assuming away.
The ranges below are directional industry estimates. They are not quotes. Scope, site conditions, and what is actually itemised in the quote move these numbers significantly in either direction.
A quote that sits significantly below the standard scope range without itemising waterproofing, drainage, and substrate preparation as separate line items is either excluding those items or pricing them in a way that warrants a question before signing. Both outcomes are worth understanding before work starts, not after the first trade is on site.
Not sure what your laundry renovation brief should include? An under-scoped brief tends to produce one of two outcomes: a quote that looks competitive until the missing items surface on site, or a renovation that completes correctly on paper but starts failing behind the substrate within a year. We connect homeowners and property investors in NSW and ACT with vetted renovation specialists who can review the scope before the quote goes out — not after it comes back short.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. Request a free consultation ›
Waterproofing and Compliance in Laundry Renovations
Most homeowners do not expect their laundry to carry the same compliance obligations as their bathroom. In many cases, it does. Where a laundry floor receives direct water contact — from the machine drain, the tub, or floor cleaning — AS 3740 waterproofing requirements apply. The same standard that governs wet area waterproofing in bathrooms and ensuites applies here.
A compliant laundry wet area has a continuous waterproofing membrane applied to the floor and wall upstands before any tile or flooring goes down. The substrate underneath needs to be appropriate — compressed fibre cement sheet in a wet area, not standard plasterboard regardless of what is installed on top of it. The membrane is the invisible layer that prevents water from reaching the structure. Most failures in laundry waterproofing are not product failures. They are installation sequence failures: tiles applied before waterproofing, or a membrane installed over the wrong substrate type.
A floor waste is required in a laundry wet area under the NCC. The position of the waste is a plumbing decision, not a tiling decision. The drainage fall — typically 60mm minimum — needs to be confirmed before the tiler sets the floor. A tiler working from a supply-only brief who assumes the fall will sort itself out during the pour is the origin of most laundry floor drainage failures.
In NSW and ACT, licensed waterproofers and plumbers are the tradespeople responsible for compliant wet area installation. The compliance obligation sits with the licensed tradesperson on site — but the homeowner who understands what the scope requires at the brief stage is the one who asks the right question before work starts, not after it finishes.
Related: Wet area compliance requirements in laundry renovations are governed by AS 3740. See our AS 3740 waterproofing compliance guide ›
Layout and Design Decisions That Determine How the Laundry Functions
The design decisions in a laundry renovation have downstream consequences that most bathroom renovation decisions do not. In a bathroom, layout is largely constrained by existing plumbing positions. In a laundry, the appliance configuration — stacked vs side-by-side, left-to-right service order — determines the cabinet run, benchtop, and plumbing rough-in position. That decision happens at the brief stage. Changing it after joinery is ordered costs the full cabinetry fabrication.
Single-wall layouts suit narrow laundries and maximise floor clearance. L-shape layouts work where plumbing and power are on adjacent walls. Galley layouts allow storage on both sides but require a minimum 900mm clearance between faces for usable working space — fewer laundries meet this than homeowners assume when reviewing the floor plan rather than standing in the built space.
Standard benchtop height is 900mm. Front-loaders under a benchtop often push the finished height to 950mm or above, depending on appliance height and whether a plinth is used. The correct height is the one that suits the appliance spec and the people using the space. Confirm appliance dimensions and door clearance before cabinetry is fabricated — not during delivery.
Overhead cabinetry clearance from the benchtop needs to accommodate appliance door swing and reasonable working height. A standard 600mm clearance between benchtop and wall cabinet soffit allows most appliance doors to open fully. Reducing this for storage gain is a trade-off worth making deliberately rather than discovering on delivery day.
Flooring in a wet area laundry is a compliance decision as much as a design one. Vinyl plank is frequently used in laundries — durable, warm underfoot, easy to cut around service penetrations. In a wet area laundry, the vinyl product needs to be rated for wet area use and correctly installed at the wall perimeter. A vinyl floor that terminates without a sealed upstand at the wall is not a compliant wet area installation. Tiles remain the most common compliant specification for laundry wet area floors, and the only one that is unambiguously appropriate where direct water contact is sustained.
The layout decision locks in the plumbing rough-in, the cabinetry fabrication, and the electrical positioning. Everything downstream follows from it. Getting it on paper — and to scale — before a single trade is briefed is the lowest-cost action available at the planning stage.
Laundry Renovation Failures That Show Up After the Trades Have Left
The same pattern appears across most laundry renovation failures: the conditions that caused them were present from the first day on site. They did not become visible until later — often much later, and always more expensive than the prevention would have been.
Drainage fall omitted — the floor does not drain
The laundry floor looks correct on completion. The issue surfaces the first time the machine drains heavily, or the tub overflows, or the floor gets wet-mopped. Water pools at the waste or away from it. The cause is almost always a drainage fall that was never specified — or was specified but not confirmed before the tiler set the floor. Removing and re-setting a tiled floor to correct the fall is not a quick or inexpensive fix. It is the full tiling cost again, plus the cost of diagnosing the problem after it has become visible.
Waterproofing not installed — or not installed correctly
This is the failure that costs the most to fix and takes the longest to become visible. A laundry floor tiled over a substrate without a compliant waterproofing membrane looks identical to one done correctly — until the first water penetration event reaches the structure.
By that point the tiles have to come up, the substrate has to be assessed, and the membrane has to be installed retrospectively. The scope excluded to reduce the quote cost has become mandatory remediation at multiples of what it would have cost in the original scope. And the damage it failed to prevent is a separate cost on top.
Cabinetry installed before services access is confirmed
The plumber arrives on site to find the cabinetry installed against the wall where the rough-in needs to go. The cabinet has to come out. In a best case, it comes out undamaged and goes back in after the plumbing is done. In a typical case, at least one panel is damaged during removal and the cabinet maker has to return. In a worst case, the cabinet run has to be redesigned because the plumbing position is incompatible with the original layout.
This is a trades sequencing failure. It is entirely preventable with a pre-site coordination call between the plumber and the cabinet installer before either arrives on site.
Appliance clearances not checked before joinery is fabricated
The washing machine door opens into the benchtop overhang. The dryer door swing is blocked by the adjacent cabinet. The front-loader drum height means the benchtop is 40mm too low to accommodate it under the cabinetry run. These measurements are on the appliance spec sheet. They are known before fabrication. The failure is not checking them at the brief stage — not a manufacturing defect discovered on installation day.
Important: A laundry renovation quote that bundles waterproofing, drainage, and substrate into a single unitemised allowance has made assumptions about at least one of them. Those assumptions tend to surface during demolition, not before. Ask for those items to be separately identified before you sign. See renovator red flags ›
Before You Commission a Laundry Renovation
Eight questions worth answering before work starts. Not an exhaustive specification — a checklist for the items most commonly missing from laundry renovation briefs, and most commonly responsible for cost surprises when they surface on site.
Layout confirmed on paper before trades are briefed
Appliance configuration, tub position, cabinet run direction — confirmed and dimensioned. Changes after joinery is ordered cost the full fabrication.
Drainage fall specified and confirmed with plumber before tiling
60mm minimum fall to waste in a wet area laundry. The tiler should not be setting floor tiles without a confirmed fall specification from the plumber.
Waterproofing scope confirmed — wet area or dry area treatment
If the floor receives direct water contact, AS 3740 applies. Confirm which treatment the quote includes and whether the substrate type is specified correctly.
Services access confirmed before cabinetry is ordered
Plumbing rough-in position and electrical outlet locations confirmed before the cabinet maker fabricates. A cabinet that blocks wall access is a significant site cost.
Appliance dimensions checked against cabinetry and benchtop spec
Door swing clearance, drum height, hose length to supply — all on the appliance spec sheet and all knowable before the joinery quote is signed.
Flooring specified to wet area requirements where applicable
Slip rating and water absorption — same compliance standards as a bathroom floor. Vinyl must be rated for wet area use and sealed correctly at the wall perimeter.
Substrate confirmed — compressed fibre cement in wet area zones
Standard plasterboard is not a compliant substrate in a laundry wet area regardless of what is installed over it. Confirm substrate type before waterproofing is scheduled.
Quote itemises waterproofing and drainage separately from finishes
If those items are bundled into a single line, ask for them to be broken out. A quote that cannot separate them has either excluded them or priced them in a way that warrants a conversation before site start.
Common Questions
That depends on scope in a way that most quoted timelines do not make clear. A laundry refresh with no structural work — new cabinetry, tapware, flooring applied over an existing substrate — typically takes two to four days. A full renovation involving plumbing relocation, waterproofing, new substrate, and tiling runs closer to five to ten working days once all trades are properly sequenced.
The sequencing is where most project timelines stretch. Plumbing needs to precede waterproofing. Waterproofing needs to cure before tiling. Tiling needs to set before cabinetry is installed. When those dependencies cannot be coordinated across trades without gaps, the calendar extends well beyond what the individual task durations would suggest. Before accepting a timeline, ask the specialist how they manage trades sequencing for a renovation of your specific scope — not just how long each trade takes in isolation.
Not automatically — but in most cases, it does. AS 3740 requires waterproofing wherever a floor or wall surface receives direct water contact. In a laundry, that typically means the floor area around the machine drain and tub. If those surfaces get wet regularly, the wet area classification applies and AS 3740 waterproofing is required.
The practical issue: most laundry renovation quotes do not clearly distinguish between wet area and non-wet-area treatment. The waterproofing is either included correctly, included cursorily, or absent. Worth identifying which applies to your quote before signing — specifically whether the waterproofing scope names AS 3740 compliance and identifies the substrate type.
A laundry renovated without required waterproofing is not compliant, regardless of what the finished floor looks like. The problem surfaces later, when water reaches the substrate. By that point, the floor has to come up.
For a finishes-only refresh that does not touch the floor or the walls behind the cabinetry, sometimes. For a full renovation involving plumbing, waterproofing, substrate, and tiling, the machines need to come out. Every trade in the structural scope sequence needs access to the floor and wall.
The question that follows from this is where the machines go during the renovation period. For most households, that means organising temporary laundry access elsewhere — a communal laundry, a family member’s home, or a laundromat for the duration. Worth factoring into the project timeline before site start, not discovering it on day one when the plumber needs the machines moved and there is no plan for where they go.
A laundry refresh replaces what is visible without touching what is behind it: new cabinetry fronts or a complete cabinet replacement, new tapware and tub, new flooring over an existing substrate, a paint job. Most of the work does not require licensed trades. Timeline is short, cost is lower, and it is appropriate when the underlying structure is sound and compliant.
A laundry renovation goes to the substrate. Plumbing is re-roughed or relocated. Waterproofing is installed or reinstalled to current standard. Substrate is assessed and replaced where required. Tiling, cabinetry, and finishes are all new. Licensed trades are involved throughout. Longer, more expensive, and necessary when the underlying structure has compliance gaps or is in poor condition.
The distinction matters most for quoting. A refresh price and a renovation price are not comparable — they are not quoting the same scope. A quote that sits well below the renovation range for a project that clearly requires structural work is usually a refresh price applied to renovation scope. The difference tends to surface on site.
At minimum: itemised plumbing — rough-in and drainage — waterproofing with the AS 3740 scope identified, substrate preparation with the type and method specified, cabinetry and benchtop with dimensions, fixtures and tapware as supply-and-install, and finishes — tiling or flooring, splashback, painting — as separate line items. Not bundled into a single ‘laundry renovation’ total.
A quote that bundles those items is not automatically dishonest. It may be priced correctly and presented as a total for simplicity. But a quote that cannot break those items out on request has not priced them individually. That distinction matters when something unexpected surfaces on site and there is a conversation about whose scope it falls into — a conversation that goes better when the quote answers it in advance.
The items most commonly omitted from low quotes are waterproofing, substrate preparation, and drainage. These require licensed tradesperson involvement and compliance sign-off. They are also the items most likely to be quietly excluded when a quote is being sharpened to win a job. If they are not in the quote, ask where they are.