Home Renovation Cost per Square Metre in Australia 2026

Home renovation costs roughly $800 to $4,000 per square metre in Australia in 2026, depending on how deep you go. A cosmetic refresh — paint, flooring, fixtures, nothing structural — sits near $800/m². A multi-room renovation runs about $2,500/m², a major single-room job around $3,000/m², and a new extension about $4,000/m² of added floor area.

That spread is the whole reason renovation quotes confuse people. Two Sydney homeowners can both say "we're renovating 120 square metres" and be $250,000 apart, because one is repainting and re-carpeting while the other is moving walls, rewiring and replumbing.

Per-square-metre pricing is still the fastest way to sanity-check a builder's number before you sign anything. This guide breaks down the rate for each renovation type, what a full house renovation costs by floor area, how the cost splits room by room, and which multipliers quietly add tens of thousands to the bottom line. Start with the free home renovation quote calculator if you want a number for your own floor area first.

Last updated: September 2026.

Key takeaways

• Renovation cost per square metre in Australia ranges from about $800/m² (cosmetic) to $4,000/m² (extension) before GST, finish upgrades and site conditions.
• A 180 m² multi-room renovation at a mid-range finish works out around $473,000 excluding GST, or roughly $520,000 including GST.
• The same 180 m² home given a cosmetic refresh only lands near $151,000 excluding GST — the structural line is where budgets triple.
• Finish tier is the single biggest multiplier: a premium finish adds 40% and a luxury, architect-designed finish doubles the base rate.
• A pre-1980 home adds about 25% to the rate before anything else, because asbestos, lead paint and original wiring are near certain.
• Living in the home during the works adds around 17.5%, and a council Development Application typically needs a $5,500 allowance on top.
• These are price indications only. Your tradie will confirm the final price after assessing the job.

Table of contents

1. How much does renovation cost per square metre in Australia?
2. What does a full house renovation cost in Australia?
3. Cosmetic vs structural renovation cost — where's the line?
4. What do renovation costs by room look like?
5. What pushes your per-square-metre rate up?
6. What isn't included in the per-square-metre rate?
7. How do you get an accurate renovation quote?
8. Renovation cost per square metre FAQs

How much does renovation cost per square metre in Australia? {#cost-table}

Renovation costs $800/m² for a cosmetic refresh, $2,500/m² for a multi-room renovation, $3,000/m² for a major single-room renovation, $3,200/m² for a knockdown rebuild and $4,000/m² for an extension in Australia in 2026. Those are mid-range finish rates excluding GST. Drop to a builder's standard finish and the rate falls about 15%; go premium and it climbs 40%.

Add 10% GST to every figure above. A luxury, architect-designed finish sits outside the range entirely — it doubles the base rate, so a $4,000/m² extension becomes $8,000/m².

How we worked this out: these rates come straight from the rate card behind Leadkit's builder renovation quote calculator, which Australian builders configure and run on their own websites. Leadkit is a lead-capture platform, not an independent cost authority — the calculator is our own tool, and each builder can edit every rate in it. Cross-check any number against the industry cost guidance published by Master Builders Australia and the Housing Industry Association. This is a price indication only. Your tradie will confirm the final price after assessing the job.

Here's the part homeowners tend to miss: the per-square-metre rate is only the starting line. In the renovation calculators our builders set up, the base rate is one of nine settings — the other eight are multipliers and allowances, and together they move the total far more than the headline rate does.

What does a full house renovation cost in Australia? {#full-house}

A full house renovation in Australia costs roughly $2,600/m² for a standard 10–30 year old single-storey home at a mid-range finish — about $315,000 for 120 m² or $473,000 for 180 m², excluding GST. The same home refreshed cosmetically costs about a third of that.

Those figures assume a single-storey home aged 10–30 years, easy street access, standard scheduling and no council approval — the most common combination Australian homeowners start with. Change any of those and the number moves, sometimes sharply.

Two practical notes. Most builders won't take on a full renovation under about $15,000 — below that the setup, insurance and supervision cost more than the job earns. And a whole-house renovation almost always trips the threshold where a Development Application is required, which is a separate cost line covered further down.

Want a number for your actual floor area? Use the free home renovation quote calculator — it takes about 30 seconds, and the result is an indication only until a builder inspects the site.

Cosmetic vs structural renovation cost — where's the line? {#cosmetic-vs-structural}

The difference between cosmetic and structural renovation cost is roughly three times per square metre: about $800/m² versus $2,500/m² and up. The line isn't about how good it looks at the end — it's about whether a trade has to open a wall, a floor or a roof.

A cosmetic refresh stays on the surface: repainting, replacing flooring, swapping tapware and light fittings, new wardrobe doors, maybe a new benchtop on existing cabinetry. No walls move, no wet areas are re-waterproofed, no circuits change. Interior wall painting alone runs about $26/m² and ceilings about $30/m², which is why paint is the cheapest way to change how a house feels.

A structural renovation touches the bones: removing or adding walls, re-waterproofing wet areas, rewiring, relocating plumbing, changing rooflines. Once you're there, the cost stops being about materials and starts being about sequencing — the plasterer can't start until the electrician's finished, the tiler can't start until the waterproofing has cured.

The scope items builders add on top of the base build cost show the gap clearly. On a $315,000 base build (120 m² multi-room), each one adds:

Tick five of those — a common scope for a tired 1970s home — and you've added 30% to the build before touching the finish tier.

One planning point worth knowing: in NSW, a lot of straightforward work can go through as complying development (a CDC) rather than a full Development Application (DA). A CDC is a fast-tracked approval issued by a certifier against a fixed set of rules, usually in weeks instead of months. Structural changes that alter the building envelope generally push you back to a DA. Check the current rules with NSW Fair Trading or your state equivalent — VBA in Victoria, QBCC in Queensland — before you assume either way.

What do renovation costs by room look like? {#by-room}

Renovation costs by room in Australia run about $16,000–$25,000 for a bathroom, $32,000–$47,000 for a kitchen and $10,000–$13,000 for a cosmetically refreshed bedroom. Wet areas cost the most per square metre because they carry waterproofing, fixtures and both plumbing and electrical trades in a very small footprint.

The bathroom figure holds up when you build it from the bottom instead of the top. A 6 m² bathroom carries roughly $1,800 of demolition and prep at $300/m², about $2,750 of tiling at $110/m² supply-and-lay, a $2,500 shower, a $2,200 bath, an $1,800 vanity, a $900 toilet, $2,500 of base plumbing, $1,500 of electrical and $1,500 of waterproofing — around $17,500 before the builder's 15% project management margin, landing near $20,000. That's the middle of the range from the per-square-metre method, which is a good sign both are sensible.

Wet areas also have hard floors. A bathroom renovation rarely starts below $6,500 and a kitchen below $3,500, no matter how small the room — the trades still have to turn up. If you're pricing a single room, the bathroom renovation quote calculator and the kitchen renovation quote calculator break the cost into line items rather than one lump. Our guide to small bathroom renovation costs goes deeper on the wet-area side.

A word on fixtures. The gap between a Caroma toilet suite from a Reece trade counter and a designer imported equivalent can be $2,000 on one item. Fixture selection is where "mid-range" quietly becomes "premium" without anyone announcing it.

What pushes your per-square-metre rate up? {#cost-drivers}

Five multipliers do most of the damage to a renovation budget: finish tier, property age, property type, site access and urgency. They compound — they don't add — so two or three together can lift a quote 50% above the base rate.

Property age is the one people underestimate. A pre-1980 home carries a 25% loading before a single fixture is chosen, because bonded asbestos in eaves, sheeting and vinyl backing is close to a given, along with lead paint and original wiring. Asbestos removal is licensed work with mandatory controls — Safe Work Australia and your state SafeWork regulator set the rules, and it is never a line you should let a builder absorb informally.

Access is the sleeper. A terrace in Paddington or a fourth-floor apartment in South Yarra can add 25–30% purely because every sheet of plasterboard and every bag of waste is carried by hand, and lift bookings and strata approvals eat days. If you're in a strata building, budget time as well as money for the owners corporation approval.

Living on site sounds free and isn't. That 17.5% pays for dust protection, staged partial scopes, daily make-good so the house stays liveable, and slower progress. Moving out for eight weeks often costs less than the premium — worth pricing both ways.

Materials pricing sits on top of all this. Building input costs have moved every year since 2021, and the Australian Bureau of Statistics publishes the producer price indexes for house construction inputs — the neutral reference if you want to check whether a builder's escalation clause is reasonable.

What isn't included in the per-square-metre rate? {#exclusions}

The per-square-metre rate covers the build. It doesn't cover approvals, design fees, GST or the contingency you'll almost certainly spend. These four lines routinely add 20–30% to a renovation total.

Council approvals — allow about $5,500. That covers the Development Application, building permit and planning consultant fees for a typical residential job. Most extensions and structural work need it; a straight cosmetic refresh usually doesn't.

Architect or building designer — 5% to 15% of build cost. A mid-range engagement sits around 8%, which on a $315,000 build is roughly $25,200. You're paying for documentation good enough to get comparable quotes, which often pays for itself. Our breakdown of architect fees in Australia covers the fee structures in detail.

GST at 10%. Residential building work for a homeowner is quoted GST-inclusive in most contracts, but per-square-metre rates circulating online are usually ex GST. Always ask which one you're looking at.

Contingency — 10% to 15%. Every renovation of an existing building finds something. Rotten bearers, a slab that isn't level, a wall that turns out to be load-bearing.

Two contract terms worth knowing before you read a quote. A prime cost (PC) item is an allowance for something not yet chosen — tapware, tiles, appliances — and you pay the difference if your selection costs more. A provisional sum is an allowance for work whose full extent isn't known yet, like underpinning or termite repair. Preliminaries (or "prelims") is the builder's line for site setup: fencing, scaffold, skips, site toilet, insurance and supervision. A quote with vague PC items and thin prelims isn't cheaper — it's just less finished.

If your project is closer to adding space than reworking it, compare the numbers in our house extension cost guide — per square metre, a granny flat frequently beats an extension.

How do you get an accurate renovation quote? {#get-quotes}

Get three written quotes from licensed builders working from the same scope document, and compare the inclusions before the totals. A quote is only comparable if all three are pricing the same job.

Do these five things and you'll avoid most renovation blowouts:

1. Write the scope down before you call anyone — room by room, what's staying, what's going, what's being moved.
2. Check the licence. Residential building work over the state threshold must be done by a licensed builder, and in NSW the job must carry Home Building Compensation Fund cover above $20,000. Verify the licence number on the state regulator's public register, not the business card.
3. Insist on itemised quotes. One number for "renovation" tells you nothing. You want trades, materials, prelims, PC items and provisional sums separated.
4. Get the payment schedule in writing. Progress payments tied to completed stages, not to dates.
5. Ballpark it first. Walking into quotes already knowing the realistic range means you can tell a sharp price from a job that's been underquoted to win the work — and underquoted jobs are where variations come from.

Want an instant price indication? Use the free home renovation quote calculator — 30 seconds, no signup. This is a price indication only. Your tradie will confirm the final price after assessing the job.

Renovation cost per square metre FAQs {#faqs}

Q: What is the average renovation cost per square metre in Australia in 2026?

A: The average sits around $2,500/m² for a multi-room renovation at a mid-range finish, excluding GST. That's the middle of a range that runs from about $800/m² for a purely cosmetic refresh to $4,000/m² for a new extension. "Average" is genuinely misleading here, because the number depends far more on the depth of the work than on the size of the home — a 200 m² repaint and a 60 m² structural job can cost the same. Pick the renovation type that matches your scope first, then apply the multipliers for your property's age, type and access.

Q: How much does a full house renovation cost in Australia?

A: A full house renovation costs roughly $236,000 for a 90 m² home and $473,000 for a 180 m² home, excluding GST, at a mid-range finish on a standard single-storey property. Add 10% GST, then add approvals, design fees and contingency on top. If the home is pre-1980 or you're staying in it during the works, expect another 25% and 17.5% respectively. Leadkit's renovation cost calculator runs those multipliers automatically against your own floor area.

Q: What's the difference between cosmetic and structural renovation cost?

A: Cosmetic renovation costs about $800/m² and structural renovation starts around $2,500/m² — roughly a threefold difference. Cosmetic work stays on the surface: paint, flooring, fixtures, tapware. Structural work opens walls, floors or roofs, which brings in licensed trades, engineering, waterproofing and usually council approval. The moment a wall moves or a wet area is rebuilt, you've crossed the line, and the cost follows immediately. If your budget is tight, a well-executed cosmetic refresh delivers a surprising amount of the visual change for a third of the money.

Q: Is it cheaper to renovate or knock down and rebuild?

A: A knockdown rebuild costs about $3,200/m² and a multi-room renovation about $2,500/m², so renovating is usually cheaper per square metre — but not always cheaper overall. A rebuild gives you a new home with a new build warranty, current energy standards and no surprises behind the walls. A renovation of a pre-1980 home carries a 25% age loading, plus asbestos and rewiring risk, and can quickly close the gap. As a rough rule: if you're touching more than about 70% of the house, price both. Our house demolition cost guide covers the demolition side.

Q: Does renovation cost per square metre include GST?

A: Usually not. Per-square-metre rates quoted in the industry and in most online guides are excluding GST, and 10% gets added at the end. Residential building contracts with homeowners, however, are generally presented GST-inclusive — which is exactly how a $2,500/m² estimate turns into a $2,750/m² contract without anything changing. Always ask a builder to confirm which basis their number is on, and make sure you're comparing all three quotes on the same basis before choosing.

Q: How much should I budget for unexpected renovation costs?

A: Allow 10–15% of the build cost as contingency, and more if the home is older than 30 years. Renovating an existing building means working with what previous trades left behind — out-of-level floors, undersized bearers, plumbing that isn't where the plans say, and walls that turn out to be load-bearing. A pre-1980 home should carry 15% minimum. This is separate from provisional sums in the contract, which cover known-unknowns the builder has already flagged; contingency covers the things nobody has thought of yet.

Q: Do I need council approval to renovate?

A: Cosmetic renovations generally don't need council approval, but structural changes and extensions almost always do. Many straightforward jobs can be approved as complying development through a private certifier rather than through a full Development Application, which is considerably faster. Budget around $5,500 for DA, permit and planning consultant fees on a typical residential project. Rules differ by state and by council, so check with your local council and your state regulator — NSW Fair Trading, the VBA in Victoria, or the QBCC in Queensland — before you commit to a start date.

Q: Why do renovation quotes vary so much between builders?

A: Quotes vary because builders price different scopes, different finish assumptions and different risk. One might allow $150/m² for tiles and another $60/m²; one might carry a proper prelims line and another might have left scaffold out entirely. Underquoting to win work is common, and the shortfall reappears later as variations. The fix is a written scope every builder prices identically, and a line-by-line comparison of inclusions before you look at the totals. If one quote is 30% below the others, the question isn't why it's cheap — it's what's missing.

Getting your renovation budget right

Start with the renovation type, not the total. Work out whether you're doing a cosmetic refresh, a multi-room renovation or an extension, multiply by your floor area, then apply the multipliers for your home's age, type and access. That gets you to a realistic range in five minutes.

Then add the lines the rate doesn't cover: approvals, design, GST and a 10–15% contingency. A budget that includes all four is a budget that survives contact with a real building site.

And get three quotes on one written scope. It's the single highest-value hour you'll spend on the whole project.

Want an instant price indication for your renovation? Use the free builder renovation quote calculator — takes 30 seconds, no signup. This is a price indication only. Your tradie will confirm the final price after assessing the job.

Are you a builder or renovator? If homeowners are landing on your website and leaving without calling, an instant quote calculator captures them with their name, email, phone and full job details while they're still interested. Embed a free Leadkit calculator on your site in 60 seconds — no credit card needed.