A knockdown rebuild means demolishing your existing house and building a brand-new home on the same block — keeping the land and location you already love, without the cost and stamp duty of buying elsewhere. It’s become one of the most popular ways to get a modern, efficient home in an established suburb. This guide covers what a knockdown rebuild typically costs and how the finance works.
Why choose a knockdown rebuild?
You keep your street, block and orientation, avoid stamp duty on a new land purchase, and end up with a home built to current standards — better energy efficiency, layout and lower maintenance than renovating an ageing house. It often works out more cost-effective than a major renovation once you factor in what a full reno really costs.
What a knockdown rebuild costs
Total cost = demolition + the new build + the “in-between” costs people forget. Indicative bands only — your figures depend on your block, council, home size and inclusions.
| Cost component | What’s involved | Indicative range* |
|---|---|---|
| Demolition | Disconnecting services, asbestos check/removal, demolition and site clearing | $20,000–$40,000+ |
| The new build | Volume-builder or custom home, by size and inclusions | From ~$300,000+ |
| Site & prep costs | Site survey, soil test, slab/piering for the block conditions | Varies by site |
| Approvals & fees | Council/planning, building permits, service connections | Varies by council |
| Temporary accommodation | Where to live during demolition and build | Ongoing during build |
*Indicative only, 2026, and not a quote — confirm current costs with your builder and council.
Rebuilding as a dual occupancy changes the numbers again — if you are weighing that option, see our guide to the cost to build a duplex.
How knockdown rebuild finance works
Most knockdown rebuilds are funded with a construction loan, which releases money in stages as the build progresses rather than all at once. A typical structure:
- Land already owned — your existing block (and any equity in it) usually forms the security, which can reduce or remove the deposit you’d need for a land-plus-build purchase.
- Progressive drawdowns — funds release at set stages (demolition/slab, frame, lock-up, fixing, completion), and you generally pay interest only on what’s drawn during construction.
- Converts to a normal home loan — once the build is finished, the loan rolls into standard principal-and-interest repayments.
Because you already own the land, a knockdown rebuild can be one of the more finance-friendly ways to build — lenders like the existing equity. Rates and structure vary; see construction loan interest rates.
The knockdown rebuild process
- Check your block is suitable (council overlays, easements, slope, access).
- Choose a builder and design that fits the site.
- Arrange finance and pre-approval based on land equity + build cost.
- Demolition and site prep.
- Progressive build with staged drawdowns.
- Completion, final inspection, and the loan converts to a standard home loan.
Talk to us about financing your rebuild
Little Home Loans helps owner-occupiers and owner-builders finance new and non-standard builds across Australia. Enquire online, call 1300 391 390, or get in touch to talk through your options.
Related guides
How do construction loans work? · Construction loan interest rates · Owner-builder finance · Modular & prefab home finance.
Knockdown rebuild — FAQs
Is a knockdown rebuild cheaper than renovating?
It often is once a renovation becomes structural. A full reno of an old home can approach rebuild cost while leaving you with old bones; a rebuild gives you a new home to current standards. Compare quotes for both on your specific house.
Do I need a big deposit for a knockdown rebuild?
Not always. Because you already own the land, the equity in your block can serve as security, which may reduce the cash deposit you’d otherwise need. Your borrowing capacity and the build cost still apply.
How long does a knockdown rebuild take?
Allow time for design, approvals and demolition before the build even starts. From knockdown to completion is commonly several months to around a year, depending on the home, builder and council.
What loan do I use for a knockdown rebuild?
A construction loan, which releases funds in stages as the build progresses and charges interest only on the drawn amount during construction, then converts to a standard home loan on completion.
Can I do a knockdown rebuild as an owner-builder?
Yes, subject to your state’s owner-builder rules and lender criteria. See our owner-builder finance guide for how the finance differs.
Written and reviewed by the Finance Director at Little Home Loans.
This article is general information only and does not constitute credit or financial advice. Little Home Loans operates under Australian Credit Licence 506065 (Five Tees Pty Ltd). Lending is subject to approval, lending criteria, terms, conditions and fees.
