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Home extension and renovation cost estimator

Work out a rough budget for extending or renovating your home in Perth based on the area affected and scope of work.

Estimated renovation cost
A$ 153,000 - 216,000

Multiplies the affected floor area by a typical per-square-metre rate for the type of work chosen.

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Local price context: based on 275 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; a detailed quote after an on-site assessment will confirm actual cost.

Compare actual quotes for this project

Your calculator inputs and the estimate are included with your enquiry, so builders can quote your actual project. Just add your location, timing, and how to reach you.

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Enquiries submitted through our forms may be shared with partner providers, and we may receive a referral fee. Our rankings and scores are based only on our published method and are never affected by referral fees.

Get quotes from top-rated custom 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. Get a quote
  2. Avia Homes
    4.9(259) 90
    Get a quote
  3. Get a quote
  4. Dare Homes
    5.0(61) 88
    Get a quote
  5. Leneeva Homes
    5.0(56) 88
    Get a quote

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Last updated 2026-08-18