In short

  • A knock down rebuild replaces the existing house on your Sydney block with a brand-new home, so you keep your address, your street and your neighbourhood.

  • It suits families who love where they live but have outgrown an older or awkward home.

  • Mojo guides the approval pathway (CDC or DA), coordinates around your demolition, and builds your new home.

  • Demolition itself is arranged with a licensed contractor, not by Mojo.

  • It starts with a free site assessment of your block.


Life changes, and so do your needs. A home that fitted you perfectly ten years ago might not suit you now. Rather than compromise with a renovation, or move away from the part of Sydney your family is settled in, a knock down rebuild lets you stay put and start fresh. You keep the view you love, the address you know and the community you have grown into. That is More Joy in the place you already call home.

Charisma 37 house design with provincial facade

What is a knock down rebuild?

A knock down rebuild means demolishing the existing house on your block and building a new home in its place. You start from one of our existing designs and personalise it around your block, your style and how your family actually lives.

It is a good fit for Sydney owners who bought well but have outgrown the house, and for anyone facing a renovation big enough that a new build makes more sense. For the full picture across our regions, see our knockdown rebuild page.

Why Sydney families choose to rebuild

  • Keep your location. Stay near the schools, work and family you have built your life around, without re-entering the Sydney property market.
  • Design freedom. Start from a blank floorplan rather than working around walls, wiring and rooms that were laid out for somebody else.

  • A home built to current standards. Natural light, open plan living, better insulation and energy performance, and storage designed around a family.

  • Make the most of your block. Whether your block suits a single storey, a double storey or a duplex, the design can be matched to the land you already own.

  • Local know-how. Our Sydney home builders work with Sydney councils, Sydney block types and Sydney site conditions every week.

Not sure whether your block suits a rebuild? Book a free site assessment and we will tell you.

Newport 28 One house design Ensuite

Rebuild or renovate?

Both can work. It depends on your home, your block and your goals.

A knock down rebuild gives you a brand-new home built to current standards, with your inclusions and design locked in before work starts. That means the budget is clear from the outset, the whole home is designed for energy efficiency rather than working around what's already there, and the disruption is contained to one planned build period. It's usually the better path when the existing home is dated or poorly laid out.

Renovating keeps the house you have, which is the right call when it's structurally sound and you love it. The trade-off is less certainty. Hidden issues can appear once work begins, efficiency gains are limited by the existing structure, and you'll likely be living through staged works. If the bones are good and the layout suits how you live, a renovation may be all you need.

More detail: knock down rebuild vs renovating.

Knock Down Get the Home You've Always Dreamed Of

What does it cost?

Your investment comes down to three things:

  • Demolition of the existing house

  • Site costs such as excavation, retaining, tree removal or services

  • Your new home: the design, size and inclusions you choose

Site costs vary from block to block, so the clearest figure is the tender we prepare after assessing your block. That is why we start with a free site assessment, so you can plan with confidence.

Helpful reading: cost to build a house.

Brampton 44 House design Stairwell

Built to last

  • Quality inclusions such as steel frames, 20mm stone benchtops and COLORBOND roofing, within the relevant M-series inclusion series

  • A 25-year structural guarantee

  • Backed by NEX Building Group and 35+ years of group experience

That is the Mojo Factor: quality you can count on, and a team that keeps the journey clear and easy to navigate. Explore our home designs to picture what is possible.

Explore our Home Designs

Do you need council approval?

  • CDC (Complying Development Certificate): a fast-tracked approval for projects that meet set standards. Usually quicker.

  • DA (Development Application): a full assessment by your local council, such as Cessnock, Maitland or Singleton, used when a project does not meet CDC criteria.

Which one applies depends on your block, zoning and design. We assess it early and arrange the right pathway for you.


See our designs in person

The easiest way to picture your rebuild is to walk through one. Visit our display homes across the Newcastle, Hunter and Central Coast region to explore layouts, inclusions and finishes in person.

Ready to start?

Book a free site assessment and one of our specialists will guide you through your options, designs and a simple path forward.

Knockdown Rebuild FAQs

Will Mojo complete the demolition of existing home?

Mojo won’t complete the demolition of an existing home. We highly recommend you engage and reputable and experienced contractor to conduct your demolition.

How to find a reputable demolition contractor for my knockdown rebuild?

The most important thing is ensuring the contractor is appropriately licensed and qualified to complete the works. You should ensure they have a demolition plan, demolition licence and demolition supervisor license. As well as ensuring a qualified professional has inspected your home for asbestos.

What questions would you be asking the demolition companies when deciding who to choose for your demolition?

Some questions you can ask the demolition companies are:

Have you done any demolitions in this area? If so, can I speak with those customers?
Within the demolition price are you removing all the footings and underground services, including storm water, gas, electrical?
My builder requires a clearance certificate – can you provide this?
If we’re required to import fill, we will need a VENM or ENM certificate - can you provide this?
We also recommend you speak to the Department of Fair Trading to see if they’re a reputable demolition contractor as every demolition must be registered with the Department of Fair Trading.

When you decide to do a knock down rebuild with Mojo we’ll be there with you throughout the entire process, giving you advice and access to our complete range of resources. Find out more here about the resources we can offer you and start your knock down rebuild journey today. 

How much will the demolition cost?

The average demolition can cost anywhere between $30,000 and $40,000 but this can vary depending on your unique site conditions.

Can I finance the demolition?

Yes! Our MyChoice Home Loans team are construction loan specialists and can talk you through financing both your demolition and build. For more information, visit: mojohomes.com.au/mychoice-home-loans

Why is a knockdown rebuild better than renovating?

Renovating can often actually end up more expensive per square metre than building a new home. It can also throw up a load of surprise costs, particularly if structural changes are needed.

A new home offers a blank canvas for both your inclusions AND floorplan, meaning you can be sure your home will suit your needs for many years to come. 

What can I expect from my knockdown rebuild quote?

The purpose of the initial quote is to identify compliance and determine the best planning pathway (local council or CDC). It helps identify or confirm that your preferred design is suitable for your block of land, and gives a great expectation on the overall cost to construct your new home.

How long does a knockdown rebuild take?

The time it takes to complete a knock down rebuild project can vary depending on a number of factors, including:

  • The size of the build: A larger build will obviously take longer to complete than a smaller one.
  • Local planning approval: The time it takes to obtain planning approval can vary depending on the local council and the complexity of the project.
  • Council permits: In addition to planning approval, you may also need to obtain other permits, such as a building permit or a demolition permit.
  • Soil conditions and site conditions: The condition of the soil and the site itself can also impact the time it takes to complete the project. For example, if the soil is unstable or there are large rocks on the site, it will take longer to prepare the site for construction.
  • Tree removal: If there are any trees on the site that need to be removed, this can add to the overall project time.
  • Demolition and site preparation: Demolition and site preparation can also add to the overall project time. This includes disconnecting and removing any existing services, such as water, gas, and electricity.
  • Weather and supply chain impacts: Weather conditions and supply chain disruptions can also impact the time it takes to complete the project. For example, if there is a prolonged period of wet weather, construction may be delayed. Similarly, if there are supply chain disruptions, it may be difficult to obtain the necessary materials, which can also delay construction.

In general the knock down rebuild pre-construction process can take around 12 months, while construction can take on average 30 weeks. However, it is important to note that this is just an estimate and the actual time it takes to complete your project may vary. Visit a display and talk to a specialist to begin planning for your particular requirements.

How to get approval for a knockdown rebuild?

You will need permission for both the demolition of your existing home and construction of your new home, this can be done via local council or CDC. Once you have received your demolition approval, Mojo will then submit your construction approval.

Knockdown Rebuild Enquiry

Get in touch with one of our Knockdown Rebuild experts, they make it simple and guide you throughout the process.

Please complete the enquiry form and someone from our team will be in contact within 24 hours to talk to you about your knock down rebuild enquiry.

Alternatively you can see more contact details on the contact page or give a design consultant a call.

1300 006 656