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Knockdown rebuild cost estimator

Estimate the combined cost of demolishing your existing house and rebuilding on the same block in Perth.

Estimated total project cost
A$ 461,000 - 589,000

This adds estimated demolition/site costs to the new build cost; the range covers typical variation in access and finishes.

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Local price context: based on 160 price points from reviews and provider websites across this directory. Recorded prices span jobs of very different sizes, so compare quotes for your exact project.

This is a rough estimate only; an on-site assessment from a builder or demolisher will confirm actual costs.

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Your calculator details and the estimate go with your enquiry so builders can quote your actual project. Just add your area, timeline, and contact details.

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Get quotes from top-rated home builders

Ranked by our published rubric from recent Google reviews, weighted by relevance to this service (the same order as the category page).

  1. Locale Homes
    5.0(333) 94
    Get a quote
  2. Get a quote
  3. Get a quote
  4. Get a quote
  5. First Homebuilders
    4.6(194) 87
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Last updated 2026-09-05