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Renovation vs. Knockdown Rebuild: A Detailed Cost Analysis
Many homeowners in established suburbs like Berwick or Narre Warren love their current block address but outgrow their aging single-storey brick veneer home. This triggers a crucial question: Do we renovate and extend, or do we execute a complete knockdown rebuild? Here is an honest cost audit based on current building conditions.
1. Renovation & Extension Costs
Renovations involve stripping out old plasterboards, modifying framing structures, or lifting roof lines for second-storey additions. While it saves you from demolishing structural brick outer walls, old homes often reveal hidden problems: dry-rotted studs, outdated wiring, or non-compliant plumbing. Renovations average higher per-square-meter trade rates due to manual structural splicing constraints.
2. Knockdown Rebuild Costs
Demolishing a single-storey timber/brick dwelling and removing the slab costs roughly $22,000 to $35,000. Once the site is cleared and leveled, construction of a brand-new custom home is highly organized. Carpenters and plumbers work with straight walls and level boundaries, achieving lower per-square-meter installation rates compared to complex structural retrofitting.
3. Decision Framework
- Renovate if: Your existing home has historical heritage value, your block has significant slope access limits, or you only need to upgrade isolated zones like the kitchen and master bedroom.
- Rebuild if: Your existing home slab is cracked, the internal layout is poorly oriented, or you want to expand your layout significantly while bringing building insulation up to modern 7-star compliance.