What a knockdown
rebuild costs in Perth.
A knockdown rebuild in Perth costs from roughly $400,000 to $800,000 or more in 2026. That splits into demolition of about $30,000 to $70,000, a new home from $309,218, siteworks of $15,000 to $40,000 and council fees of $3,000 to $8,000. The Property Plug prices all four as one honest figure.
All figures on this page are indicative ranges for Perth, current June 2026. They are not a quote. Your actual cost depends on your block, design, council and selections.
Independent and on your side. We are paid by the builder, never by you.
A Perth knockdown rebuild has five cost components: demolition, the new home, siteworks, council approvals and any asbestos works. The table below shows the indicative 2026 range for each and what pushes it up or down, so you can see where your money actually goes before you commit to a builder.
| Component | Indicative range (Perth, June 2026) | Confidence | What drives it |
|---|---|---|---|
| Demolition and site clear | $30,000 - $70,000 | High | House size, double storey, council material separation, access |
| Asbestos removal (if present) | $1,500 - $15,000+ | Medium | Amount and location of asbestos, licensed removal |
| New home (base) | $309,218 - $535,929 | High | Design, size, storeys, frontage, inclusions |
| Build cost per m2 | $2,500 - $3,500 / m2 | Medium | Specification, size, design complexity |
| Siteworks | $15,000 - $40,000 | Medium | Earthworks, retaining, drainage, service connections, slope |
| Council and approvals | $3,000 - $8,000 | Medium | Demolition permit, building permit, compliance certificates |
| Indicative total | $400,000 - $800,000+ | High (as a range) | All of the above plus finishes and any subdivision |
Confidence reflects how tightly the market data clusters as of June 2026. High means consistent across multiple Perth sources. Medium means a wider spread driven by block and specification. All are indicative, not a quote.
Demolition is the cost most owners underestimate. In Perth in 2026, clearing a standard single-storey home runs about $30,000 to $70,000. Perth councils now require material separation, which means concrete, brick, metal and timber are sorted rather than mixed, and that adds labour. Double-storey homes, tight access and asbestos all push the figure toward the top of the band.
- House size and storeys. Demolition is broadly priced by floor area, so a larger or double-storey home costs more to bring down and cart away.
- Material separation. Sorting waste into concrete, brick, metal and timber streams is now standard in Perth and adds labour versus a single mixed skip.
- Asbestos. Common in pre-1990 Perth homes, licensed asbestos removal typically costs two to three times more than standard demolition for the affected material.
- Access. Narrow streets, tight side access or overhead power can force smaller machinery and slower work.
- Service disconnections. Power, gas, water and sewer must be safely disconnected before any machine touches the house.
After demolition, siteworks are the second biggest variable. They cover everything to make your cleared block ready for a new slab: earthworks, retaining, drainage and service connections. A flat, square block with good fall might land near $15,000, while a sloping or reactive-soil block can push siteworks to $40,000 or beyond before a single wall goes up.
| Driver | Effect on cost |
|---|---|
| Slope and fall | A sloping block needs cut-and-fill and retaining, lifting siteworks materially |
| Soil type | Reactive clay or sand needs deeper or engineered footings |
| Retaining walls | Required where levels change at boundaries, priced per metre and height |
| Drainage | Stormwater and soakwells sized to the block and council rules |
| Service connections | New power, water, sewer and gas connections to the rebuilt home |
| Frontage and access | Narrow lots can limit machinery and crane access, adding time |
Here is how the numbers stack up for a typical single-storey Perth rebuild. This is an illustration of the method, not a quote for your block. It demolishes a standard home, builds a mid-band single-storey design and applies typical flat-block siteworks and council fees.
| Item | Indicative figure |
|---|---|
| Demolition, single-storey home with material separation | $45,000 |
| New home, mid-band single-storey design (base) | $360,000 |
| Siteworks, flat block with standard connections | $28,000 |
| Council and approvals | $5,500 |
| Indicative total (excludes land, you own it) | $438,500 |
Worked example only, current June 2026. Excludes furnishings, landscaping beyond the contract, any asbestos and any subdivision. Your figure will differ. Build time is around 12 months from site start.
Two rebuilds on the same street can differ by six figures. The biggest levers are the home you choose, the condition of your block and the level of finishes. Understanding these before you sign means the price you are quoted is the price you pay.
- 01The home itself. Size, storeys, frontage and inclusions level set the base. Designs in the catalogue run from $309,218 to $535,929.
- 02Block condition. Slope, soil, retaining and access drive siteworks anywhere from $15,000 to $40,000 or more.
- 03Asbestos. Present in many older Perth homes, it lifts demolition cost and must be removed under licence.
- 04Finishes and selections. Stone benchtops, higher ceilings, extra power points and premium tapware all add at prestart.
- 05Subdivision. Splitting the lot adds survey, approval and servicing costs but can unlock a second dwelling.
The Property Plug is a broker, not a builder, so we have no reason to bury demolition or siteworks in the fine print. We price the rebuild as one figure across a verified panel, show real from-prices on every design, and we are paid by the builder, never by you. That is how the brochure number and the landed number finally line up.
- Every design shows a real from-price, not a per-square-metre teaser.
- Demolition, siteworks and approvals are costed in, not discovered later.
- We use real per-suburb siteworks data, so your figure reflects your block.
- Independent and on your side. We are paid by the builder, never by you.
How much does it cost to demolish a house in Perth in 2026?
As an indicative 2026 guide, demolishing a standard single-storey Perth home runs about $30,000 to $70,000. The figure climbs with house size, double-storey structures, the material separation Perth councils now require, difficult access and any asbestos. Asbestos removal alone can add roughly $1,500 to $15,000 or more depending on how much is present. These are indicative ranges, not a quote.
What is the total cost of a knockdown rebuild in Perth?
Total knockdown rebuild budgets in Perth commonly fall between $400,000 and $800,000 or more in 2026. That combines demolition of roughly $30,000 to $70,000, a new home from $309,218, siteworks of about $15,000 to $40,000 and council fees of $3,000 to $8,000. Your number depends on your block, design and finishes. These are indicative ranges only.
How much does it cost to build a new home per square metre in Perth?
Quality volume-builder construction in Perth runs roughly $2,500 to $3,500 per square metre in 2026, with custom and high-specification builds reaching well above that. The Property Plug shows a real from-price on every design instead of a per-square-metre teaser, so you can see the actual base before siteworks. These figures are indicative, not a quote.
Does asbestos make a knockdown rebuild more expensive in Perth?
Yes. Many pre-1990 Perth homes contain asbestos in eaves, fencing or cladding, and licensed removal typically costs two to three times more than standard demolition work for the affected material. We flag it early during feasibility so it is costed in, not discovered later.
What changes the price of a knockdown rebuild the most?
The biggest movers are the size and storeys of the home you build, the slope and access of your block which drive siteworks and retaining, whether asbestos is present, and the level of finishes you choose. Subdividing the lot also changes the maths. We price all of these honestly up front.
Is the new home cost the same as a knockdown rebuild cost?
No. The advertised home price is only one part. A knockdown rebuild also carries demolition, siteworks, council approvals and any asbestos works. The Property Plug brings them together into one indicative figure so the brochure price never hides the real landed cost. See our knockdown rebuild guide for the full process.
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