How Much Does It Cost to Renovate a Kitchen and Bathroom?
Renovating a kitchen and bathroom together is the most common large-scope home project Australians take on — and the one most likely to run over budget. Not because the trades are expensive. Because most homeowners accept a lump-sum figure early in the process and only find out what it excluded when the variation orders start arriving. The cost ranges in this guide are real. So are the reasons they move.
This guide covers what a combined kitchen and bathroom renovation actually costs in Australia, what drives the difference between a $25,000 project and a $75,000 one, what compliance obligations apply in each room under NSW law, and how to read a quote before you sign it — not after. If you’re working out whether this is financially viable and what to check before you get quotes, you’re in the right place.
What a Combined Kitchen and Bathroom Renovation Costs in Australia
The figures below are what licensed, compliant renovation work costs in practice — waterproofing inspections, compliance certificates, and all trade sign-offs included. They’re directional estimates, not quotes. Scope, substrate condition, and site access are the three variables that actually move costs — sometimes significantly. A quote built on a phone call and a few photos will rarely hold once a tiler pulls the first tile off the wall.
One thing worth stating before the table: a quote that doesn’t include the waterproofing certificate, the substrate preparation allowance, or the compliance inspections isn’t a cheaper renovation. It’s an incomplete one. The gap between the headline number and the final invoice almost always traces back to what the original quote left out.
When you’re comparing quotes for a combined project, ask for the kitchen and bathroom to be itemised separately within the same document. A single lump sum covering both rooms makes it almost impossible to compare contractors on the same basis — or to identify which room is carrying the variation when costs move.
Related: Full line-item cost breakdown for bathroom renovations in NSW — what each trade line should include and what a properly itemised quote looks like. See our bathroom renovation cost guide ›
The Case For — and Against — Renovating Both at Once
Combining kitchen and bathroom renovations makes genuine financial sense in some situations. In others, it adds complexity and budget exposure without a proportionate return. The honest answer to “should I do them together?” depends on your specific circumstances — not a general rule.
The argument for doing both at once rests on three things. Trade overlap is the most concrete: a licensed plumber and electrician mobilised for one room can absorb the second in the same visit. That saving is more meaningful in regional NSW and rural markets, where trade availability is tighter and call-out costs add up. Disruption consolidation is the second — one period of upheaval instead of two, which matters if you’re living in the property. There’s also a modest advantage in offering a contractor both rooms of scope rather than one small job.
The case against is simpler: two rooms means two substrates, two compliance obligations, and two potential sources of scope variation. More variables, more exposure. If your contingency budget is limited, a single-room renovation is a more controllable project. Worth noting too — combined contracts at mid-range or above will generally exceed $20,000, which triggers the HBCF insurance requirement before any work starts. That’s not a reason not to combine. It’s a reason to verify the certificate is in place before you sign.
You’re living in the property and want one disruption period, not two.
Trade availability in your area is limited — mobilising once for both rooms cuts scheduling friction.
Both rooms genuinely need work — doing one now and finding the other needs it shortly after is an expensive lesson.
The combined scope exceeds $20,000 regardless — the HBCF requirement applies either way, so you may as well capture the overlap saving.
Budget is constrained — two rooms at once commits a larger sum upfront than a single-room project.
One room is structurally sound; the other isn’t — prioritise the compromised room, reassess the other once that work is done.
The scope of one room is unclear until demolition — getting one room done gives you real cost data before committing to the second.
The property is tenanted — staging minimises vacancy, and a single-room scope is easier to manage around an occupied tenancy.
What Actually Drives Cost in a Combined Renovation
The figure in any cost guide — including this one — is a midpoint. Real jobs land above or below it based on the variables below. Some of them you can assess before the quote. Others don’t surface until the tiles come off.
Substrate condition in both rooms
The single largest cost variable in either room, and the hardest to assess without a physical inspection. In bathrooms, deteriorated substrate under existing tiles — compressed fibre cement, failed chipboard, early-generation waterproofing membrane past end of life — is common in homes built before the 1990s. Kitchens have the same issue behind splashbacks, under flooring, and beneath bench tiles. A thorough quote includes a substrate assessment allowance. One that doesn’t is betting nothing bad is hiding underneath.
Layout change versus in-place renovation
Moving where a sink, shower, or toilet sits in either room resets the cost floor for that trade. Every fixture relocation requires a licensed plumber to rough-in new drainage and supply lines from scratch. Kitchen bench relocations that move the sink do the same. Each relocation typically adds $2,000–$6,000+ depending on how far the new position sits from the existing stack. An in-place renovation — same footprint, everything replaced — avoids this entirely and is almost always the more cost-efficient brief where the layout works.
Fixture and material specification
Stone benchtop versus laminate. Large-format tile versus standard 300×600 porcelain. Freestanding bath versus alcove. Custom joinery versus flat-pack. These decisions drive a significant portion of total cost — materials at premium specification can double the cost of a mid-range scope job. Establish specification before you get quotes, not after. A quote built on “standard fixtures” is not a quote you can hold anyone to when the specifics change.
Trade availability and regional logistics
In regional NSW, specific licensed trades — waterproofing, electrical, and specialist tiling — can carry a small availability premium or require longer scheduling windows than metro. For properties well outside a major regional centre, mobilisation cost may appear as a separate line item. These are real factors that belong in the quote. They are not, under any circumstances, a reason to use an unlicensed tradesperson.
Compliance scope per room
Bathroom: licensed waterproofer, AS 3740 inspection, certificate of compliance before tiling, licensed plumber and electrician for their respective scope. Kitchen: licensed electrician for new circuits, oven connection, and rangehood; licensed plumber if the sink or dishwasher moves, or if any gas connection is involved. These costs are fixed. They are not a line item to negotiate out of the quote. A quote that omits them is not a cheaper renovation — it’s an incomplete one.
Asbestos and hazardous materials
In homes built before 1990 — which covers most of Australia’s suburban and regional housing stock — tiling adhesives, wall sheeting, and flooring materials may contain asbestos. Licensed identification and removal adds cost and lead time. It is not a discretionary line item. An honest quote for an older home either includes an asbestos assessment or explicitly states it has been excluded, and on what basis. A quote that mentions neither is worth asking about directly.
Budget a 10–15% contingency on a combined kitchen and bathroom renovation. Not optional padding — it covers the substrate findings that only appear after demolition, asbestos testing in pre-1990 homes, and waterproofing scope that’s impossible to quantify until tiles are removed. A quote that leaves no room for contingency is a quote that assumes no surprises. In older housing stock, that assumption is rarely correct.
Compliance Obligations: What Applies in Each Room in NSW
The compliance framework for a bathroom renovation and a kitchen renovation overlap in some areas and diverge in others. A combined project doesn’t consolidate the obligations — it carries both sets. Each room has its own inspection requirements, its own certificate, and its own licensed trade obligations. Both need to be accounted for in any honest quote.
Licensed waterproofer required. Wet area waterproofing must comply with AS 3740 and the National Construction Code.
Waterproofing inspected and certificate of compliance issued before tiling proceeds. Mandatory — not a step that can be skipped to save time or cost.
Licensed plumber for any drainage, fixture relocation, or rough-in work.
Licensed electrician for exhaust fan, heated towel rail, or any lighting changes.
Statutory warranty under the Home Building Act 1989 applies to all licensed work: 6 years for major structural defects, 2 years for other defects.
Licensed electrician for new circuits, dedicated oven connection, and rangehood installation. Ducted rangehood penetrations may need council notification depending on the LGA.
Licensed plumber if the sink or dishwasher location changes, or if any gas appliance connection is involved.
DA or CDC approval required if structural changes, wall removal, or external penetrations form part of the scope.
AS 3740 waterproofing requirements apply to kitchen wet areas — commonly overlooked, but required where applicable under the NCC.
Heritage-listed properties and strata titles carry additional approval requirements before any renovation work can begin.
For combined projects above $20,000 — which covers most mid-range kitchen and bathroom renovations done together — the licensed contractor must take out Home Building Compensation Fund (HBCF) insurance before work commences. This protects you if the contractor becomes insolvent, dies, or disappears before the job is finished. Ask for the certificate before signing anything. A contractor who can’t produce it, or who hedges when you ask, is giving you more information than they intend to.
NSW Fair Trading licence verification takes about two minutes at service.nsw.gov.au. Check the licence number and the licence class — the class has to match the work. A plumbing licence doesn’t cover structural or tiling work. A builder’s licence doesn’t cover plumbing. Two minutes before you commit is a worthwhile investment.
Related: NSW Fair Trading licensing requirements for bathroom and kitchen renovation contractors — what licence class applies, how to verify it, and what happens when work is done without one. See our NSW Fair Trading licensing guide ›
Related: Waterproofing compliance for wet areas under AS 3740 — inspection requirements, certificate of compliance, and why skipping the inspection creates a problem that shows up years later. See our AS 3740 waterproofing compliance guide ›
What an Honest Combined Renovation Quote Should Include
A properly structured quote for a combined kitchen and bathroom renovation itemises each room separately — and within each room, separates the trade lines. A single lump sum covering both rooms is nearly impossible to compare against another quote on the same basis. And when variations arrive, a lump-sum quote gives you nowhere to start the conversation.
Any line item not on this list should prompt a direct question before signing: “Is this included?” It’s a faster and cheaper conversation before work starts than a variation order mid-project.
The items most commonly missing from low quotes. Substrate preparation and levelling compound — frequently required, rarely quoted upfront. The waterproofing membrane AND the certificate of compliance — two separate items, both mandatory; low quotes often omit one or both. Back-buttering for large-format tiles — required under installation standards, time-consuming, easy to leave out under cost pressure. Movement joints at internal corners in tiled areas — silicone, not grout, a structural requirement that matters. Waste removal for both rooms. A quote that bundles all of this into a single labour figure is not a quote you can compare accurately against others on the same basis.
The Combined Renovation Scopes We See Most
The six project types below reflect what actually comes through in combined renovation enquiries. Not categories from a brochure — the scopes that come up repeatedly across different property types, budgets, and locations. The housing stock shapes the brief more than most homeowners expect.
The brief is always the same — clean, neutral, durable, done quickly. Not personal taste, not premium specification. The aim is presentation value for sale, not a renovation the vendor gets to enjoy. Typical combined range: $28,000–$52,000.
Both rooms renovated while the property is vacant between tenants. Standard porcelain tiling, flat-pack or semi-custom joinery, reliable fixtures. Fast turnaround, durable finishes that hold up under tenancy. Typical combined range: $22,000–$40,000.
Higher specification: stone benchtops, large-format tile, custom joinery, quality tapware. Longer consultation phase. The homeowner is living with the result for years, so personal preference carries more weight than it does on a sale or rental project. Typical combined range: $50,000–$90,000+.
Benchtop, tapware, splashback, vanity, toilet suite — no structural work, no tiling. Only viable where both rooms’ substrates are confirmed sound and waterproofing is intact. Worth investigating before assuming either way. Typical combined range: $12,000–$22,000.
The kitchen is the scope driver — new layout, plumbing relocation, new island or bench position. The bathroom is renovated in-place while licensed trades are on site. Common in homes where the kitchen layout is the main bottleneck. Typical combined range: $32,000–$58,000.
The bathroom requires wet area investigation and re-membrane following waterproofing failure. The kitchen is refreshed at the same time to avoid a second round of disruption. An opportunistic combination that makes practical sense when both rooms need attention. Typical combined range: $20,000–$36,000.
If You Can’t Do Both at Once: How to Stage the Work
If budget or timing means one room has to come first, do the bathroom first. A waterproofing failure in a bathroom doesn’t stay in the bathroom — it migrates into the subfloor, the wall cavity, and sometimes the room next to it. The cost of deferring a compromised bathroom compounds over time in a way that deferring a dated kitchen simply doesn’t.
If both rooms are cosmetically dated but structurally sound — substrate in good condition, waterproofing intact, no evidence of moisture ingress — then kitchen first is defensible. Kitchens tend to carry more weight in resale appraisals at the mid-market level. But get a substrate assessment done on the bathroom before you commit to that sequence. A waterproofing failure identified after the kitchen is finished means a second round of disruption at the worst possible time.
The right sequence depends on the actual condition of both rooms — not a general rule. A quote conversation that starts with “which room is more urgent?” is the right starting point. A contractor who goes straight to scope and specification without asking that question is sequencing for their schedule, not yours.
Not sure which room to prioritise? Lifestyle Bathrooms connects homeowners with licensed renovation specialists across NSW. A consultation covers both rooms — including which to prioritise and why — at no obligation. Request a free consultation ›
Ready to Get a Quote for Your Kitchen and Bathroom?
Submit a quote request and a specialist covering your area will be in touch within 48 hours to discuss scope across both rooms. No obligation. Just a direct conversation about your brief, your timeline, and what a properly itemised combined quote should include.
Lifestyle Bathrooms is a referral and connector service, not a licensed contractor. We connect homeowners across NSW with vetted, licensed kitchen and bathroom renovation specialists.
Common Questions About Kitchen and Bathroom Renovation Costs
Often, yes — but not automatically. The saving comes from trade overlap: a licensed plumber and electrician mobilised for one room can absorb the second in the same visit, which cuts call-out costs and reduces scheduling gaps. In regional NSW, where trade availability is tighter, that saving is more meaningful than in metro areas.
The risk is scope creep. Two rooms, two substrates, two sets of compliance obligations — more variables means more exposure to budget movement. Combined contracts at mid-range or above also tend to exceed $20,000, which triggers the HBCF insurance requirement before work starts. The saving is real. It just requires both rooms to be scoped and quoted rigorously — not bundled into a single lump sum that’s hard to audit when costs move.
Active on-site work for a standard combined renovation — both rooms, mid-range specification, no major structural changes — typically runs 3 to 7 weeks. That’s time with trades on site, not the full project duration.
It doesn’t include the lead time before the first tradie arrives, which in regional NSW commonly runs 4 to 10 weeks from quote acceptance depending on current workload. The bathroom waterproofing cure time — a minimum of 48 to 72 hours before tiling can proceed — is a fixed point on the critical path that can’t be compressed. If you need both rooms finished by a specific date, work backwards from that date and factor in the scheduling window, not just the on-site duration.
Generally no, for internal renovations that don’t involve structural changes or external penetrations. There are exceptions. A ducted rangehood requiring a new external wall penetration may need council notification in some LGAs. Removing a structural wall requires a building approval regardless. Renovations on heritage-listed properties or within strata schemes carry additional requirements — from the heritage office or the owners corporation respectively.
If any part of your scope involves external works, structural change, or the property falls into a special category, check with your local council before committing to a contractor. The cost of getting this wrong is larger than the cost of asking first.
At mid-range — roughly $28,000 to $55,000 combined — you’re looking at a full gut and rebuild of both rooms. Kitchen: flat-pack or semi-custom joinery, engineered stone benchtop, standard-grade tapware, porcelain tiling, and all licensed electrical and plumbing work. Bathroom: full substrate preparation, waterproofing to AS 3740 with certificate, porcelain tiling, standard vanity, toilet suite and tapware, and all licensed trade sign-offs.
What mid-range doesn’t include: layout changes that require plumbing or structural relocation, premium stone surfaces, custom cabinetry, high-specification appliances, or any scope that surfaces after tile removal. Budget a 10–15% contingency on top of the quoted figure — particularly for homes built before 1990, where substrate surprises are common.
The clearest sign is a lump-sum figure that doesn’t separate the trade lines. A quote that presents kitchen and bathroom as a single number — or that lists trades without itemising each one by location and scope — makes it impossible to verify what’s included or to compare it accurately against another quote.
The items that disappear most often from low quotes: substrate preparation and levelling compound; the waterproofing membrane and the certificate of compliance (two separate items, both mandatory); back-buttering for large-format tiles; movement joints at internal corners in tiled areas (silicone, not grout — a structural requirement); and waste removal for both rooms. Ask for a line-by-line breakdown before you sign. A contractor who resists that request is telling you something worth knowing.