The Builder’s Right to Claim Variations

Some building contracts allow the builder to claim additional costs where something turns out to be more complicated than quoted. The question is whether your contract defines when that right applies and what notice you receive.

Not every variation starts with the owner

A builder may be entitled to raise a variation for regulatory requirements, documentation discrepancies or conditions discovered during construction.

The contractual power matters

Check whether the contract actually gives the builder that right, and in what circumstances.

Notice and pricing should be defined

Understand whether you must be notified before being charged and how the additional cost is calculated.

A label is not the last word

Work described as a variation may in fact be within the original scope, or may be correcting defective work. Ask which it is.

Keep a variation register

Track every variation - owner and builder initiated - so you can see the cumulative effect on the price.

Questions to ask before signing

Can the builder claim a variation I did not request? What triggers that right? What notice must I receive? How is the additional cost priced?

The key lesson

Builder-initiated variations can move the price. Know when the contract allows them and what notice you are entitled to before you sign.

Before You Sign

This guide provides general educational information for South Australian homeowners. It is not personalised legal advice. The effect of any issue depends on the wording of your own contract, schedules, Special Conditions, plans, specifications and the facts of the project. A good builder and a well-understood contract should work together. Before committing to one of the largest financial transactions you may ever undertake, consider having the actual contract reviewed so you understand the obligations, notice requirements and consequences before they are tested on site.

Before You Build. One Signature. One Chance.