← All Insights

Contracts & Costs

Knock Down Rebuild vs. Renovating: Which is Cheaper?

A real cost comparison for Sydney homeowners in 2026. Where renovating wins, where a knock down rebuild wins, the hidden costs of each, and the numbers that should drive your decision.

TL;DR For light to moderate work on a structurally sound home, renovating is almost always cheaper. For deep, whole-home change — or a home with bad bones — a knock down rebuild often costs the same or less per square metre while delivering far more. The decision usually turns on one number: how much of your renovation spend goes into work you can't see or sell. In 2026 Sydney, a quality renovation runs roughly $2,500–$5,500 per square metre, and a new build runs roughly $2,500–$4,500 per square metre. Renovations cost more per metre than people expect because old structures fight back. This article shows you where each option wins and how to find your own break-even point. Why "cheaper" is the wrong first question Cost per dollar is easy to compare; cost per outcome is what matters. A $30…