Keep the street.
Replace the house.
A knockdown rebuild replaces a tired home on land you already own with a brand-new one. In Perth, plan for demolition of about $30,000 to $70,000 plus a home from $309,218 and siteworks. The Property Plug brokers the whole rebuild across a verified builder panel, free to you.
Indicative ranges only, current June 2026. Not a quote. Your figure depends on your block, council and selections.
Independent and on your side. We are paid by the builder, never by you.
A knockdown rebuild is simpler than most owners expect, because the hard part, the land, is already yours. The Property Plug runs the process end to end and keeps you to one decision at a time.
- 01
Check feasibility
We confirm your block can take a fresh build, check frontage, orientation, council overlays and any heritage or character controls, and pressure-test whether a rebuild genuinely beats renovating for your goals.
- 02
Match a design to your lot
Established Perth lots vary from narrow infill blocks to wide quarter-acre survivors. We match a design from the panel to your retained lot width, setbacks and the way you want the home to sit on the block.
- 03
Price it as one number
We bring demolition, siteworks and the home together into a single indicative figure, then a fixed builder quote, so you are never surprised by a cost that lived outside the brochure price.
- 04
Approvals and demolition
Your builder secures the demolition and building permits, disconnects services, removes any asbestos to regulation, then demolishes and clears the block ready for the new slab.
- 05
Build the new home
Construction runs in stages over around 12 months from site start. You move back into the same street in a brand-new, warranted, energy-efficient home.
A knockdown rebuild gives you a fully new home with current energy ratings, a fresh structural warranty and a layout designed around how you live. A renovation is usually faster and cheaper up front, but you keep the old slab, footings, wiring and plumbing. The right call depends on the bones of your existing home and your budget.
| Factor | Knockdown rebuild | Major renovation |
|---|---|---|
| Typical Perth spend | From $309,218 home, plus $30,000-$70,000 demolition and siteworks | Roughly $250,000-$450,000 for a full structural reno |
| What you keep | Nothing, fully new build | Old slab, footings, wiring, plumbing, roof frame |
| Energy efficiency | Built to current NCC standard | Limited by the retained structure |
| Structural warranty | New home warranty on the whole house | Covers new work only |
| Layout freedom | Designed from scratch around your block | Constrained by existing walls and services |
| Disruption | Move out, demolish, rebuild | Often live on site through the works |
| Best when | Home is tired, dated or unsalvageable but the location is gold | Good bones, you only need to update part of the home |
Renovation figures are indicative market ranges for a full structural renovation in Perth, current June 2026, not a quote.
The Property Plug prices a knockdown rebuild as three honest parts: demolition, the new home and siteworks. As an indicative 2026 guide, expect demolition around $30,000 to $70,000, a home from $309,218, and siteworks of roughly $15,000 to $40,000. Total Perth budgets commonly fall between $400,000 and $800,000.
| Cost band | Indicative range (Perth, June 2026) | What drives it |
|---|---|---|
| Demolition and site clear | $30,000 - $70,000 | House size, double storey, material separation, access, asbestos |
| New home (base) | From $309,218 | Design, size, storeys, frontage, inclusions level |
| Siteworks | $15,000 - $40,000 | Earthworks, retaining, drainage, service connections, slope |
| Council and approvals | $3,000 - $8,000 | Demolition permit, building permit, compliance certificates |
| Indicative total | $400,000 - $800,000+ | All of the above, plus finishes and any subdivision |
These are indicative ranges, not a quote, current June 2026. Construction costs in WA continued rising through 2026. The full breakdown, drivers and worked example are on the Perth knockdown rebuild cost guide.
Knockdown rebuilds make the most sense in established Perth suburbs where the land already holds value and the location cannot be matched by a new estate. Older western, riverside and inner-south pockets are the classic candidates. We price the rebuild against the real siteworks for your suburb, so the figure reflects your actual block.
A sample of established corridors where owners commonly rebuild. We confirm feasibility, frontage and council controls against your specific lot before you commit.
The design that suits a knockdown rebuild depends on your retained lot. Narrow infill blocks suit single-storey and double-storey designs built for frontages of 10.5 metres or less. Wider established lots open up the larger family designs. Every design below carries a real from-price and full inclusions.
For narrow established lots (10.5m and under)
14 designs in the catalogue fit a tighter infill block after demolition.
WA · Perth 6m lot 
WA · Perth 7.5m lot For standard and wide lots (12.5m and over)
24 designs suit a wider retained block where you can spread out.
Because you already own the land, a knockdown rebuild is usually funded with a construction loan secured against the property and drawn down in stages as the build progresses. Owning the block outright can lift your borrowing position. Our in-house finance arm models the numbers alongside the build, so funding and construction stay in step.
- Existing equity in the land can reduce or remove the cash deposit you need for the build.
- Construction loans release funds in stages, so you only pay interest on what has been drawn.
- We coordinate finance and build timing together, so demolition does not start before funding is locked.
- If you are also subdividing, we factor the land and finance structure in early.
This is general information only and does not take into account your objectives, financial situation or needs. It is not credit advice. See our finance hub for the full disclosure.
What is a knockdown rebuild and how does it work in Perth?
A knockdown rebuild means demolishing the existing house on a block you already own and building a brand-new home in its place. In Perth it suits owners who love their location but have an older, tired or poorly laid-out home. The Property Plug brokers the rebuild across a curated panel of verified builders, matching a design to your retained lot at no cost to you.
Is a knockdown rebuild cheaper than renovating?
Not always cheaper, but often better value. A major renovation of a 1970s or 1980s Perth home frequently runs $250,000 to $450,000 and you still keep old slab, wiring, plumbing and footings. A knockdown rebuild starts from $309,218 for the home plus demolition of roughly $30,000 to $70,000 and siteworks, and delivers a fully new, warranted, energy-efficient home. The full cost breakdown is on our Perth knockdown rebuild cost guide.
How much does a knockdown rebuild cost in Perth in 2026?
As an indicative 2026 guide, demolition runs about $30,000 to $70,000, the new home starts from $309,218, and siteworks add roughly $15,000 to $40,000 depending on the block. Total knockdown rebuild budgets in Perth commonly land between $400,000 and $800,000 or more. These are indicative ranges, not a quote. See the full cost guide.
Which Perth suburbs are best for a knockdown rebuild?
Established, well-located suburbs with older housing stock are the strongest candidates, because the land already holds value and the location cannot be replicated in a new estate. Western suburbs, riverside pockets and inner-south corridors are popular. We confirm feasibility against your specific block, council and frontage before you commit.
How long does a knockdown rebuild take?
Plan for demolition and approvals first, then around 12 months for the build itself from site start, subject to your block, council approvals and selections. We give you a firm program once your design and builder are matched.
Can I finance a knockdown rebuild if I already own the land?
Yes. Because you already own the land, most owners use a construction loan against the property, drawn down in stages as the build progresses. Our in-house finance arm can model the numbers for you. This is general information only, not credit advice.
Price your knockdown rebuild
One request gets your block assessed, a design matched and demolition, siteworks and the home costed as one number. Free to you, no obligation.