Cost guide
How much does it cost to build a house in Australia?
By Struqt’s architects · Updated June 2026
In 2026, building a new house in Australia typically costs from about $1,800/m² with a volume (project) builder up to $5,000/m² or more for a custom-designed home. Your block, design, specification and builder type move the final figure most — so the same floor plan can cost very different amounts on two different sites.
Key takeaway: Rates vary most by city and builder type — Sydney sits at the top of the range and Adelaide at the lower end.
Volume vs custom builder
Volume (project) builders build hundreds of homes a year from standard floor plans and inclusions. That streamlines the pre-construction phase and keeps pricing competitive — common in newly developed estates. They often limit, or charge a premium for, changes to plans.
Custom-designed homes start at a higher price point but offer design flexibility, are tailored to your site, and give you freedom of selections. A custom build suits knock-down rebuilds, extensions, or restrictive, sloping or heritage sites that need careful design.
What it costs in each city
What moves the price on your block
Sloping or difficult land
$20,000–$100,000+Retaining walls, earthworks (cut & fill) and split-level designs all add cost on a sloping block.
Soil type
$10,000–$80,000+Your soil classification drives footing cost. Reactive clay needs more extensive footings and reinforcement; rocky ground costs more to excavate.
Planning overlays
$15,000–$60,000+Heritage, flooding and bushfire overlays under the planning scheme can add significant cost to a build.
What is overlay? →Service connections
$10,000–$30,000Sites without access to sewer, water or other services can need on-site solutions such as septic tanks or large rainwater tanks.
Internal fitout
Tens of thousandsFlooring, joinery, tiling heights, air conditioning and plumbing fixtures vary greatly in cost. Higher specifications can add tens of thousands of dollars.
External works
Often excluded from contractFootpaths, driveways, fencing and landscaping are commonly left out of contract pricing but are important to budget for.
What’s included — and what’s not
A builder’s contract price usually covers the house itself — slab, frame, roof, lock-up and the internal fit-out to your agreed specification. It often excludes the “site costs” of building on your particular block, and external works like driveways, fencing and landscaping. Always budget a 10–20% contingency on top of the headline build cost.
Frequently asked questions
What's the difference between a volume builder and a custom build?
Volume (project) builders work from standard plans and inclusions, which keeps prices competitive but limits changes. A custom build is designed around you and your site, with more flexibility — at a higher starting price. Volume rates start lower per m²; custom rates run higher and are open-ended.
Does the build cost include everything?
No. Contract pricing usually excludes external works like driveways, fencing and landscaping, and can exclude site costs on a difficult block (slope, reactive soil, service connections). Always budget a 10–20% contingency on top of the headline build cost.
How much does it cost to build a house per square metre in 2026?
Across our focus cities, volume builders run roughly $1,800–$3,200/m² and custom builds roughly $2,600–$6,000+/m², depending on the city and your site. Sydney sits at the top of these ranges and Adelaide at the lower end.
Disclaimer. The figures in this guide are estimates intended as a planning guide only. Actual costs vary significantly depending on your site, design, specification and current market conditions. Always seek detailed quotes from licensed builders, and factor in a contingency of 10–20% before committing to a budget.
Get the exact cost for your block
These are typical ranges. Run any Australian address through Struqt to see what’s actually possible on your specific property — architect-authored, government-data-backed.