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Blog Article

How Much Does a Knock Down Rebuild Cost in NSW?

 

What's the Cost?

Analysing Knock Down Rebuilds in 2026?

 

One of the first questions people ask when exploring a Knock Down Rebuild is: what is this actually going to cost me?
It's a fair question, and the honest answer is that the total depends on a number of factors specific to your block,  your design, and  your location.

But having a clear breakdown of each cost component means you can budget accurately and avoid surprises.
Here's what to plan for.

1. Demolition

Before anything can be built, the existing home has to come down. Demolition of a typical single-storey home in NSW generally costs between $15,000 and $40,000. The key variables are:

  • Size and materials — larger or brick homes cost more to demolish
  • Asbestos — older homes (pre-1990) may contain asbestos, which requires licensed removal and disposal, adding to cost
  • Access — tight blocks or difficult site access can increase demolition complexity
  • Waste disposal — all materials need to be removed and disposed of or recycled

Your builder will typically coordinate the demolition or connect you with a licensed demolition contractor.

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2. Council Approvals and Fees

Building a new home in NSW requires council approval. Depending on your project, this will be either a Development Application (DA) or a Complying Development Certificate (CDC) — the latter being a faster approval pathway for homes that meet set standards.

Approval fees vary by council and project size, but you should budget between $3,000 and $10,000+ for application fees, certifier costs, and associated reports (such as survey, soil test, and BASIX energy efficiency assessment). Your Hunter Homes consultant will advise on the most appropriate pathway for your block.

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3. Site Preparation

Once approvals are in place and demolition is complete, the site needs to be prepared for building. This includes:

  • Soil testing — to understand ground conditions and determine the right slab type
  • Site levelling — sloped or uneven blocks may require cut and fill work
  • Service connections — water, sewage, electricity, and NBN disconnection and reconnection
  • Temporary fencing and site setup
Site preparation costs vary significantly depending on your block. A flat, standard block in a serviced area will cost considerably less to prepare than a sloped or difficult site.
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4. The Build

The build itself is typically the largest single cost.

In NSW, new home build costs generally start from $300,000 to $600,000+ depending on the size, design, and inclusions. Factors that influence build cost include:

  • Floor plan size — more square metres means higher cost
  • Storeys — double-storey homes cost more per square metre than single
  • Design complexity — custom designs, high ceilings, and premium facades add cost
  • Inclusions — kitchen, bathrooms, flooring, and fittings vary widely
  • Site-specific requirements — steel slab vs. concrete, specific engineering requirements

Hunter Homes offers fixed-price build contracts, which means your quoted price is your build price — no surprise variations.

HH-Kenneth-276-port-mac-owens-facade
 

What's the Total?

As a general guide, a complete Knock Down Rebuild in NSW, covering demolition, approvals, site preparation, and a standard-size new home,
typically falls in the $400,000 to $700,000+ range in total.
 
This varies considerably based on location, design, and site conditions.

The best way to get an accurate figure is to speak directly with a KDR builder who can assess your specific block.

 

Talk to the Hunter Homes team to find out what's possible on your block.
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