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Knockdown Rebuilds

Knockdown Rebuild Sydney: The Complete 2026 Cost & Process Guide

A complete 2026 guide to knockdown rebuilds in Sydney. Real costs, council approvals, timelines, finance and the mistakes to avoid before you rebuild.

TL;DR A knockdown rebuild lets you keep your land and replace the house on it with a brand-new home. In Sydney it often costs less than buying again in the same suburb, and it removes stamp duty and agent fees. A realistic all-in budget for a standard single-storey demolition and a mid-spec new home usually sits between $900,000 and $1.4 million, with site conditions deciding where you land. Most Sydney knockdown rebuilds take 12 to 24 months start to finish. What is a knockdown rebuild? A knockdown rebuild (KDR) means demolishing your existing home and building a new one on the same block. You keep your street, school catchment and suburb, and get a modern layout, better energy efficiency and a fresh warranty. It is different from a renovation. A renovation keeps and works around old stru…