Why Your Renovation Quote Shouldn't Change Once Work Starts

"Your renovation quote will always balloon once work starts" is one of the most common things we hear from first-time clients, usually from a friend's bad experience. It isn't really a myth about renovations in general. It describes what happens when a quote is vague enough to leave room for it. A lump-sum number with no breakdown makes it easy for costs to creep once work is underway, because nobody agreed in writing what was actually included.

The fix is straightforward: every cost is itemised before the contract is signed, not estimated afterward. Carpentry, flooring, electrical, plumbing: each has its own line and its own number, agreed before any work begins. If a client wants to add scope partway through, that's a written variation, not a verbal understanding that shows up as a surprise on the final invoice.

Because the scope is fixed in writing, the payment schedule can be fixed too: 10% to confirm the project, 40% before works start on site, 45% at the midway point, and 5% at handover. Each milestone ties to a real, visible stage of the work, which is also why it's a useful gut-check when you're comparing quotes from different firms. Ask what triggers each payment, not just what the total is.

Ask for the breakdown, not just the bottom line. Ask what happens if you want to change something midway. Ask what the payment schedule is tied to. A firm that can answer all three clearly, in writing, is the one whose quote won't move once the work starts.