Knockdown Rebuild in Melbourne: The Complete Process, Costs and Timeline
10 July 2026 · 4 min read
In established Melbourne suburbs, land is tightly held and renovation approvals can be just as complex as a full rebuild. That's why more homeowners are choosing to knock down their existing house and start again on the same block. A knockdown rebuild lets you keep the location you love, the school zone, the established garden, the street you've raised your kids on, while getting a home designed entirely around how you actually live. It's one of the most common conversations we have with clients across Melbourne's established suburbs, and it comes with its own process, costs and timeline worth understanding before you commit.
Why Homeowners Choose to Knock Down and Rebuild
For most of our clients, the decision comes down to one of three things. The land is worth more than the existing house, and the block itself is the asset worth keeping. The current layout no longer suits how the family lives day to day, whether that's an outdated floor plan or a lack of natural light. Or a renovation quote came back nearly as expensive as a full rebuild, without delivering anywhere near the same result. Starting from a clean slate also means you can build in smart home technology and a higher energy rating from the first sketch, rather than retrofitting it into an existing structure later.
Step 1: Site Assessment and Feasibility
Before anything is demolished, we check the title for easements and covenants, confirm what overlays apply (heritage, vegetation protection, neighbourhood character), and carry out a soil test. Overlay zones are especially common in Bayside and the inner suburbs, and they can add real time to a project if they aren't identified early. If your block sits within one, our guide to Bayside's overlay zones is a useful starting point.
Step 2: Demolition Permits and Asbestos Checks
Any home built before the early 1990s should be assessed for asbestos before demolition begins. Services (power, gas, water and telecommunications) need to be formally disconnected, and your demolition contractor will need council notification and a permit before work starts. This stage typically takes one to two weeks once approvals are in place.
Step 3: Design and Planning Permit
With the site cleared, our design team works with you to plan a home that suits the block's orientation, size and any overlay constraints. Depending on your suburb, you may need a planning permit (issued by council, addressing land use and built form) as well as a building permit (issued by a registered building surveyor, confirming compliance with the National Construction Code). Heritage or vegetation overlays usually mean the planning stage takes longer, so it pays to build extra time into your schedule if your block is affected.
Step 4: Fixed-Price Contract and Construction
At Saleh Homes, we move to a fixed-price contract once the design is locked in, so there are no surprises once construction begins. If you'd like to understand exactly what that involves, our guide to fixed-price contracts covers what's included, what's excluded, and how variations work. From there, construction follows the same staged process as any custom build: site works, frame, lock-up, fit-out and final inspections.
Step 5: Handover
Once your new home passes final inspection, we hand over keys along with your structural warranty documentation and a full set of as-built plans for future reference.
How Long Does a Knockdown Rebuild Actually Take?
As a rough guide: demolition takes one to two weeks, design and planning approval usually runs two to four months (longer if overlays trigger a heritage or vegetation assessment), and construction of a custom luxury home typically takes eight to twelve months. All up, most of our clients are looking at twelve to eighteen months from the decision to rebuild through to moving in.
What Does It Cost?
Costs vary significantly depending on block size, site access, and the specification level you're building to, so it's worth treating any online estimate with caution. Demolition and disconnection fees are only the first line item; the real cost driver is the build itself. The most reliable way to know what your project will cost is a proper site assessment and a fixed-price quote, rather than a rule-of-thumb figure that may not reflect your block.
If you're weighing up a knockdown rebuild against buying elsewhere, we're happy to talk through the feasibility of your specific site with no obligation.
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