Adelaide has quietly stopped being Australia’s cheap capital. Median dwelling values have pushed past $900,000, growth has run ahead of most of the eastern seaboard for several years running, and the trades market has tightened with it. The renovation costs people quote from memory — the ones anchored to what a friend paid in 2019 — are now roughly 40 to 60 per cent below what the same job costs today.
This guide sets out what renovation work actually costs in Adelaide in 2026, broken down by project type and scope, with the local factors that push a job above or below the range. Adelaide has two cost drivers that most national price guides ignore entirely: extremely reactive clay soils across the plains, and salt damp in the stone and solid-masonry housing stock that makes up much of the inner ring. Either one can add five figures to a project that looked straightforward on paper.
For more detail on this part of the project, see Kitchen Renovation Costs in Adelaide: What You Actually Pay in 2026.
The Short Answer: Adelaide Renovation Costs by Scope
Most Adelaide renovations fall into one of four bands. These are all-in figures including labour, materials, waste removal and a builder’s margin, but excluding design fees, council fees and furniture.
- Cosmetic refresh — $30,000 to $70,000. Paint, flooring, lighting, new kitchen benchtops and doors, a bathroom refit, some landscaping. Nothing structural, no plumbing relocated, no walls moved.
- Standard full renovation — $120,000 to $280,000. New kitchen, one or two bathrooms, laundry, rewire, replumb, new flooring throughout, some wall removal, external painting and a modest deck.
- Renovation plus extension — $300,000 to $650,000. The above plus a rear addition of 40 to 70 square metres, usually open-plan living and a new main suite.
- High-end whole-house renovation — $700,000 to $1.8 million plus. Full structural work, architect-designed, premium finishes, often on a heritage or character property in the inner east or the seaside suburbs.
Per square metre rates
Builders in Adelaide quote renovation work on a rate per square metre when they need to give an early figure. The current bands are roughly:
For more detail on this part of the project, see Home Extensions in Adelaide: Costs, Approvals and What Works.
- $1,600 to $2,400 per square metre for cosmetic and light renovation work in existing rooms.
- $2,600 to $3,800 per square metre for a standard renovation involving new wet areas, some structural change and services replacement.
- $3,800 to $5,500 per square metre for a ground-floor extension built to a good standard on a reasonably flat site.
- $5,500 to $9,000 per square metre for second-storey additions, high-end finishes, or work on constrained sites in the inner suburbs where access is difficult.
Treat these as a sanity check rather than a quote. A 50 square metre extension at $4,000 per square metre is $200,000, and if a builder comes back at $135,000 you should be asking what has been left out rather than congratulating yourself.
Kitchen Renovation Costs in Adelaide
The kitchen is where most renovation budgets first go sideways, because the visible components — doors, benchtop, splashback — are a smaller share of the total than people expect.
What the tiers actually buy
- $18,000 to $28,000. Flat-pack or entry-level custom cabinetry, laminate or entry engineered stone benchtop, tiled splashback, mid-range Australian-brand appliances, keeping the existing layout and plumbing positions.
- $30,000 to $55,000. Custom cabinetry from a local joiner, 20mm engineered stone with a mitred edge, integrated dishwasher, induction cooktop, quality soft-close hardware, some layout change, new lighting and power circuits.
- $60,000 to $110,000. Full custom joinery including a butler’s pantry, thick stone with waterfall ends, imported appliances, integrated fridge, feature veneers or two-pack in a specified colour, and structural changes to open the space.
- $120,000 and above. Designer involvement, stone slab splashbacks, European appliance suite, bespoke metalwork, and the sort of detailing that requires the joiner on site for a week of fitting.
Two Adelaide-specific notes. First, engineered stone containing crystalline silica has been prohibited nationally, which has pushed the market toward porcelain, sintered stone and natural stone; expect to pay 15 to 30 per cent more for a benchtop than the equivalent product cost three years ago, and expect longer lead times on porcelain slabs coming through Adelaide’s smaller supply chain. Second, if the kitchen sits against an external wall in a solid stone or double brick villa, moving the sink or adding a rangehood duct means coring through 300 to 450 millimetres of masonry, which is a specialist job rather than a quick afternoon.
Bathroom Renovation Costs in Adelaide
A full bathroom strip-out and rebuild in Adelaide runs $20,000 to $32,000 for a standard main bathroom in 2026, which is the tier most homeowners land in. The bands look like this:
- $10,000 to $15,000. Cosmetic — vanity, tapware, mirror, toilet, sometimes a shower screen, with existing tiles and waterproofing left in place. One to two weeks.
- $16,000 to $22,000. Partial rebuild, wet zones stripped and re-waterproofed, stock fixtures and off-the-shelf tiles. Three to four weeks.
- $22,000 to $32,000. Full strip to studs or masonry, re-waterproofed, mid-tier vanity with stone top, quality tapware, floor-to-ceiling tiling, new exhaust and lighting. Four to six weeks.
- $35,000 to $60,000. Large-format porcelain, freestanding bath, frameless walk-in shower, designer tapware, heated towel rail, underfloor heating, niches and shadow-line detailing. Six to ten weeks.
- $65,000 and above. Stone slab wall linings, imported European fixtures, joinery-grade vanities, and a designer specifying every millimetre.
The line items that move the number
- Relocating the soil stack: $2,500 to $4,500. Moving a toilet more than a metre from its existing position almost always triggers this.
- Asbestos in a pre-1987 bathroom: $2,500 to $6,500 for testing and licensed removal. Adelaide’s post-war housing stock is full of asbestos sheet wall linings behind tiles.
- Room size: Small bathrooms cost more per square metre — roughly $2,800 to $3,800 per square metre for a compact room versus $2,200 to $2,800 for a large one — because the fixed costs of waterproofing, plumbing and trade attendance do not shrink with the floor area.
- Tiles: $35 to $65 per square metre for stock ceramic against $120 to $250 for imported porcelain, plus higher laying rates for large-format and any pattern that requires cutting.
Extension Costs in Adelaide
A ground-floor rear extension is the most common structural project in Adelaide, particularly on the deep allotments of the inner and middle-ring suburbs. Budget $3,800 to $5,500 per square metre for a well-built extension with a reasonable specification. A typical 45 square metre open-plan living and dining addition therefore lands somewhere between $170,000 and $250,000 before you touch the existing house.
Second-storey additions are a different proposition. Adelaide’s older housing stock was not built with future upward extension in mind, and the existing footings almost never carry the load. Expect $6,000 to $9,000 per square metre once you include underpinning, structural steel, a new staircase eating floor area from the ground level, and the fact that the entire roof comes off and the house needs weather protection for months.
Why footings cost more in Adelaide than almost anywhere
Adelaide sits on some of the most reactive clay soils in the country. Under AS 2870 site classification, large parts of the metropolitan plains classify as H1, H2 or E — high to extremely reactive — meaning surface movement of 40 to 75 millimetres or more between a wet winter and a dry summer. This has direct consequences for renovation work:
- Extension footings must be designed for the site class, which typically means deep bored piers or a heavily reinforced stiffened raft rather than a simple strip footing. The difference between a Class M and a Class E footing design on a 45 square metre extension is commonly $15,000 to $35,000.
- The new structure and the old one move at different rates. A properly designed extension is either fully articulated from the original house with a movement joint, or founded deep enough that both are stable. Getting this wrong produces the diagonal cracking at the junction that you see on half the failed extensions in Adelaide.
- A soil test and engineer’s footing design is a non-negotiable early cost — usually $1,200 to $3,000 combined — and it should be done before you finalise the budget, not after.
- Trees matter. Large eucalypts, especially within a distance equal to their mature height, dry the clay profile and drive differential movement. Removing one can be as destabilising as leaving it, because the soil rehydrates and heaves.
The Adelaide Cost Multipliers Nobody Quotes For
Salt damp
Adelaide’s stone and solid masonry housing stock — bluestone villas, sandstone-fronted cottages, limestone in the west — was mostly built with a slate or bituminous damp-proof course that has since failed, or with none at all. Salt damp shows as bubbling paint, crumbling mortar, white efflorescence and spalling stone in the bottom 600 to 900 millimetres of wall.
Remediation is priced per linear metre of wall treated:
- Single brick walls: roughly $90 to $100 per metre for siloxane cream injection.
- Double brick or block: roughly $100 to $120 per metre.
- Stone walls up to 450mm thick: roughly $120 to $150 per metre.
- Stone walls over 450mm: quoted on inspection, and usually higher again.
Injection stops future moisture rising. It does not repair the damage already done, and the repair is the larger cost: replacing decayed mortar, replacing spalled stone, removing the cement render that trapped the moisture in the first place, replastering internally with a breathable lime-based system, and replacing skirtings and floor timbers. A villa with salt damp across two external walls and one internal wall commonly costs $20,000 to $45,000 to properly resolve. Budget for it explicitly if you are buying anything solid masonry built before about 1930.
Asbestos
Adelaide built extensively in asbestos cement sheet from the 1940s through to the mid-1980s — eaves, bathroom and laundry linings, fences, garage walls, and the ubiquitous “super six” roofing. Licensed removal runs $60 to $120 per square metre for bonded sheet, with higher rates for friable material and roofing. A full eaves replacement on a 1960s home is commonly $6,000 to $12,000.
Services in solid masonry
Rewiring and replumbing a timber-framed house is straightforward. Doing it in a solid stone or double brick villa is not, because there is no wall cavity to run services through. The options are surface conduit, chasing the masonry, or furring out and lining the internal face of the wall — which is often the best answer because it also creates a place for insulation, but it costs $180 to $280 per square metre of wall and reduces room dimensions. Add 25 to 40 per cent to a services budget for solid masonry construction.
Professional Fees, Approvals and the Rest of the Budget
- Building designer: $4,000 to $15,000 for a renovation and extension package.
- Architect: 8 to 15 per cent of construction cost for full service.
- Structural engineer: $1,500 to $5,000 depending on the complexity of the structural work.
- Soil test and site classification: $600 to $1,200.
- Development application fees: lodgement, planning consent and building consent fees are calculated on development cost; budget $1,500 to $6,000 for a typical renovation and extension.
- Building Indemnity Insurance: paid by the builder and passed through, typically 0.5 to 1 per cent of contract value. Mandatory for domestic building work above $20,000.
- Energy assessment: $400 to $900 where the work triggers NatHERS compliance.
- Contingency: 10 per cent for a new-ish home, 15 to 20 per cent for anything pre-1960 or solid masonry.
How to Build a Budget That Survives Contact With a Builder
The single most useful thing you can do before you start ringing builders is to write down three numbers: what you want to spend, what you could spend if you had to, and what the property is likely to be worth finished. If the middle number is above the third number minus the cost of buying and selling, the project does not work financially no matter how much you like the design.
A workable sequence
- Get a building inspection focused on the things that cost money here — salt damp, footing movement, asbestos, roof structure, wiring age.
- Get the soil test and site classification before finalising any extension design, because it changes the footing budget materially.
- Have a designer produce a scheme you are happy with, then get a quantity surveyor or an experienced builder to price it in outline before you spend money on full documentation.
- Document properly. Vague drawings produce vague quotes, and vague quotes become variations at build-time rates.
- Get three quotes from builders who have done comparable work on comparable housing stock, and compare the inclusions line by line rather than comparing the headline figures.
- Set the contingency and do not treat it as a scope budget.
Adelaide’s renovation market rewards people who do their investigation before they commit. The city’s housing stock is older and more structurally particular than most, the ground it sits on moves more than most, and both of those things are far cheaper to design around than to discover halfway through a build.
For the detail on individual parts of a project, see the specific guides on kitchen renovation costs in Adelaide, bathroom renovation costs, home extensions and whether your project needs council approval. If you are still deciding whether to renovate at all, the comparison in knockdown rebuild versus renovate is worth reading before you commission a design.