Realistic renovation budgets for Australian homes — from cosmetic updates to full structural renovations, with cost drivers and budgeting advice.
Last updated: 14 July 2026 · 940 words
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As of 14 July 2026, 57,692 — Development applications indexed from the NSW Planning Portal public register (NSW Planning Portal)
As of 14 July 2026, 128 — Every NSW council's development applications, updated daily (NSW Planning Portal)
As of 14 July 2026, 18 — Construction material prices benchmarked against ABS producer price movements (ABS PPI 6427.0)
Renovation costs in Australia vary enormously depending on scope, location, materials, and site conditions — a cosmetic refresh of a tired kitchen can cost under $20,000, while a full structural renovation of a Federation home in Sydney can push well past $500,000. Understanding how budgets break down by project type is the most reliable way to set realistic expectations before you engage a builder or apply for approvals.
How Renovation Projects Are Categorised
Australian builders, quantity surveyors, and councils broadly group residential renovations into three tiers: cosmetic, mid-range, and structural. Each tier carries different regulatory obligations, trades requirements, and cost profiles. Knowing which tier your project sits in shapes everything from your Development Application (DA) process to your choice of contract.
- Cosmetic renovations — painting, flooring, fixtures, fittings, and joinery replacement with no structural or waterproofing work
- Mid-range renovations — kitchen and bathroom remodels, deck additions, internal reconfiguration involving non-load-bearing walls
- Structural renovations — extensions, second-storey additions, load-bearing wall removal, re-stumping, and heritage restorations
Cosmetic Renovation Costs
Cosmetic work is the fastest way to lift a property's presentation without triggering council approvals in most jurisdictions. In many states, purely cosmetic work falls under exempt development, meaning no DA or Complying Development Certificate (CDC) is required. Always verify with your local council, as definitions vary.
Indicative cost ranges for common cosmetic projects:
- Interior repaint (whole house, 3–4 bedrooms): $8,000–$18,000 indicative
- Flooring replacement (timber or hybrid, per room): $2,500–$6,000 indicative
- Bathroom fixture upgrade (no tiling or waterproofing): $3,000–$9,000 indicative
- Kitchen cabinet and benchtop replacement (same layout): $12,000–$28,000 indicative
Labour costs in Sydney and Melbourne typically run 15–30% higher than regional Queensland or South Australia for equivalent trades, so location is a consistent cost driver even at the cosmetic tier.
Kitchen and Bathroom Renovation Costs
Kitchens and bathrooms carry the highest cost-per-square-metre of any room in the house because they concentrate wet trades, electrical, cabinetry, and waterproofing into a compact space. In NSW, any waterproofing work must be carried out by a licensed contractor and comply with AS 3740.
Indicative cost ranges:
- Budget bathroom renovation (retile, new fixtures, new waterproofing): $15,000–$28,000 indicative
- Mid-range bathroom renovation (layout change, freestanding bath, full refit): $28,000–$55,000 indicative
- Budget kitchen renovation (standard cabinets, laminate benchtop, new appliances): $18,000–$35,000 indicative
- Mid-to-high kitchen renovation (stone benchtop, custom joinery, island): $40,000–$90,000 indicative
BASIX requirements in NSW apply to alterations that affect energy or water performance — a full bathroom remodel may trigger obligations around fixtures and insulation. Victoria's equivalent is the NCC Section J and local planning overlays.
Extensions and Additions
Ground-floor extensions — whether a rear living room, a garage conversion, or an additional bedroom — require a DA or CDC in most Australian states. CDC pathways are faster but apply only where the project complies with the Complying Development Code and sits outside flood, bushfire, or heritage overlays.
Indicative cost ranges:
- Single-storey rear extension (30–50 m²): $120,000–$220,000 indicative
- Garage conversion to living space: $40,000–$90,000 indicative
- Second-storey addition (full floor, 3 bedrooms + bathroom): $280,000–$500,000+ indicative
Second-storey additions in particular are subject to close structural scrutiny. Engineers must assess whether existing footings, wall frames, and connection points can carry the additional load — remediation of substandard existing structure is a frequent hidden cost.
Full Home Structural Renovation Costs
A full renovation — where the home is stripped to its frame and rebuilt internally, or where major structural changes occur throughout — is the most complex and expensive category. These projects almost always require a DA, a principal contractor holding a relevant builder's licence, and in most states a Home Building Compensation Fund (HBCF) policy (formerly known as Home Warranty Insurance).
Indicative ranges for full renovations:
- Full internal renovation, no extension (3-bedroom home): $180,000–$380,000 indicative
- Full renovation with single-storey extension: $350,000–$650,000 indicative
- Heritage home full renovation (Federation, Queenslander, Art Deco): $450,000–$900,000+ indicative
Heritage properties carry additional costs due to Council heritage overlay conditions, requirements to retain or replicate original materials, and the slower pace of sympathetic construction.
Key Cost Drivers Across All Project Types
- Site access and conditions — sloping blocks, poor soil, limited vehicle access, and asbestos removal all add measurable cost
- Material selection — the gap between builder-grade and architect-specified finishes can double the cost of wet areas alone
- Trade availability — in regional areas or post-disaster rebuild zones, lead times and rates for licensed tradespeople increase significantly
- Council and approval fees — DA lodgement fees, planning levies, and Section 7.11 contributions (NSW) or equivalent state charges can add $5,000–$30,000+ to a project budget
- Contingency — the HIA and most quantity surveyors recommend a minimum 10–15% contingency on renovation projects; older homes should allow 20%
Renovation Cost Comparison by Project Type
| Project Type | Typical Scope | Indicative Cost Range | Approval Usually Required |
|---|---|---|---|
| Cosmetic refresh | Paint, floors, fixtures | $10,000–$30,000 | Generally no |
| Kitchen or bathroom remodel | Wet areas, cabinetry, tiling | $15,000–$90,000 | Sometimes (waterproofing, electrical) |
| Ground-floor extension | New rooms, structural work | $120,000–$220,000 | Yes — DA or CDC |
| Second-storey addition | Full upper level | $280,000–$500,000+ | Yes — DA |
| Full structural renovation | Whole-home remodel ± extension | $180,000–$900,000+ | Yes — DA, licensed builder |
Budgeting and Contract Advice
Before approaching builders, commission a preliminary quantity surveyor estimate or use a fixed-price feasibility service — this gives you a defensible budget figure before you invest in detailed design. For projects above the relevant threshold in your state (commonly $20,000 in NSW and Victoria), a written HIA or Master Builders contract is required by law for residential work. Ensure your contract specifies a fixed price or a clearly defined cost-plus structure, and that variations require written approval before work proceeds.
Use our renovation cost calculator or builder directory to get suburb-specific estimates and connect with licensed contractors in your area.
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FREQUENTLY ASKED
How much does a full home renovation cost in Australia in 2026?
A full home renovation in Australia ranges from $80,000 for a cosmetic-only update (paint, flooring, kitchen and bathroom refreshes) to $500,000+ for a comprehensive structural renovation including extensions, new roof, replumbing, and rewiring. The median scope — a full kitchen, two bathrooms, and internal reconfiguration — typically costs $150,000–$280,000. Source: DBS Real Cost Database, April 2026.
What is the most expensive part of a home renovation?
Structural work — removing load-bearing walls, relevelling floors, replacing structural timber, or adding a second storey — is typically the most expensive per-square-metre component of a renovation. Kitchen renovations average $25,000–$65,000. Bathroom renovations average $15,000–$40,000. Extensions (new rooms added to the building envelope) cost $2,000–$4,500/m² including approval. Asbestos removal adds $5,000–$30,000 if present.
Do I need council approval to renovate in NSW?
In NSW, internal renovations that do not affect the structure, external appearance, or building envelope generally do not require council approval. Structural changes (removal of load-bearing walls, new openings), external alterations, additions to the building envelope, and works costing over $50,000 typically require either a CDC or DA. Always check your council LEP and seek advice from a certifier before committing to a scope.
What is a realistic renovation contingency budget?
Budget a minimum 20% contingency above the quoted renovation price. Renovation scopes expand once walls are opened — water damage, outdated wiring, substandard previous workmanship, and unlisted asbestos are common discoveries. On a $200,000 renovation, hold $40,000 in reserve. For older homes (pre-1990), increase the contingency to 25% due to higher probability of legacy issues.
Should I renovate my home or sell and buy a renovated property?
The decision turns on stamp duty, renovation uplift, and time horizon. Buying a renovated equivalent incurs 4–5% stamp duty on the purchase price. Renovating your existing home attracts no stamp duty on works completed. However, renovation carries execution risk (cost overruns, defects, disruption) that buying does not. If your expected renovation uplift exceeds stamp duty savings by a comfortable margin, renovating typically wins.
How do I find a licensed renovation builder in NSW?
In NSW, any building work valued at over $5,000 must be performed by a holder of a contractor licence issued by NSW Fair Trading under the Home Building Act 1989. Verify any builder's licence at the NSW Fair Trading register (onlineservices.fairtrading.nsw.gov.au). Design Build Source lists verified renovation builders with current licence numbers, professional indemnity, and public liability insurance confirmed.
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Design Build Source — Australia's construction intelligence platform. Data sourced from ABS, council DA registers, and verified professional quotes.
This guide is for general information only and does not constitute professional advice. Cost figures are indicative estimates based on the DBS Real Cost Database and ABS Producer Price Indexes. Always obtain independent advice from a licensed builder, quantity surveyor, or financial adviser before making construction or financial decisions. Build costs vary significantly by site, design, finish level, and location.
