Variation
By George Giannakakis · M.Arch · RLA300580 · HIA Industry Judge
Last reviewed: · How we research
Variation explained in detail
A change to the original building contract scope, whether adding, removing, or modifying work. Variations usually incur additional costs (including builder's margin) and must be agreed in writing. Too many variations can significantly blow out your budget and extend your build time.
Related Terms
Frequently Asked Questions
Common questions about variation
Variations typically cost the actual work plus the builder's margin (usually 15-30%). Even small changes can be expensive once you add margin, administration, and any flow-on effects. A seemingly minor change like moving a door can cost $500-$2,000. To avoid variation blowouts, finalise your selections before signing contracts.
Contract and legal information
Building contracts, dispute resolution, and consumer law are complex and vary by state and contract type. The information here is general in nature and may not apply to your situation. For advice about your specific contract, rights, or dispute, speak with a building lawyer, your state’s consumer protection body, or a licensed building consultant.
More Terms in Contract Terms
Verify against the binding rules in your state
BuildPilot is an independent home-build CoPilot - we publish guidance, we don't hold a building licence. Every Australian residential build must comply with the National Construction Code plus state-specific Acts and consumer-protection law. The authorities below are the primary sources of truth for the rules that actually apply to your project.
National
The primary national set of technical building standards that every Australian build must comply with. Volume 2 covers Class 1 & 10 buildings (most homes).
Specific material, product and method standards (e.g. AS 3700 masonry, AS 1684 timber framing) referenced by the NCC.
National peak body for residential builders. Publishes the most widely used home-building contracts and consumer guidance.
National peak body for general builders. Publishes commercial and residential contracts and industry guidance.
By state & territory
Links above open the public website of each authority. BuildPilot is not affiliated with these bodies and does not act on their behalf. Information on this page is general - check the current edition of the NCC and the relevant state Act for binding requirements.
We use cookies to improve your experience. Cookies on. Learn more