Renovate or rebuild?
How to make the call.
Most people ask this question about money and get answered with sentiment. Here is the test we use standing on the block, including the cases where renovating is clearly right.
Rebuild when the house needs new roof, wiring, plumbing and layout, since renovations at that scale routinely blow out 20 to 40 per cent. Renovate when the structure is sound and the work is contained.
The test
Four questions that settle it.
The renovate-or-rebuild decision is usually made emotionally and justified financially. It works better the other way around. Four questions get you most of the way there.
How much of the house survives?
Count what you are keeping. If the answer is the slab, the external walls and nothing else, you are paying to work around a shell rather than to keep a house. That is the clearest rebuild signal there is.
How old are the services?
Wiring, plumbing, drainage, roof and insulation all have a life. If three of the five need replacing, you are building a new house inside an old one, at a premium and with worse access.
Does the layout work?
Renovations design around what is already there. If the living areas face south and the bedrooms are off the entry, no renovation budget fixes the fundamentals.
What does the block want?
Sometimes the existing house sits in the worst position on the land. If the right home for that block is somewhere else on it, a renovation locks in the mistake permanently.
Two or more rebuild signals and the numbers usually follow. One signal, and a well-scoped renovation is often smarter money. Zero, and you want an extension rather than either.
The honest comparison
What each path actually buys.
These are the trade-offs as they show up on real jobs. Neither column is wrong. They suit different houses.
Major renovation
- ✗Open-ended cost, with blowouts of 20 to 40 per cent routine once walls open
- ✗New money wrapped around old structure, wiring and plumbing
- ✗Compromised layout, because you design around what is already standing
- ✗Old energy performance in the parts you keep, and old bills with it
- ✗Warranty covers the new work, not the existing house it joins onto
Knockdown rebuild
- ✓Priced up front, with site conditions assessed before contract
- ✓A whole new home engineered to current standards
- ✓Designed for how you live, and for where the sun actually is
- ✓No stamp duty, no agent fees, same street and same school zone
- ✓10-year structural guarantee across the entire home
The part builders skip
When renovating is clearly the right call.
We build new homes for a living, so take this as it is meant. Plenty of houses should not be knocked down, and we say so at the site assessment often enough that it surprises people.
Renovate when the bones are genuinely good. A solid double brick home with decent ceilings, sound drainage, a roof with life left and a floorplan that only needs the back opened up is a renovation. Replacing it buys little and costs a lot.
Renovate when the problem is contained. A tired bathroom, a kitchen from three decades ago or a dark rear living area are specific problems with specific fixes. You do not demolish a house to solve a bathroom, and you can live elsewhere for weeks rather than the year-plus a rebuild needs.
Renovate when demolition is not really available. Heritage controls, a character overlay or a covenant can rule a rebuild out, or make it slow and expensive enough to stop making sense. Answer that planning question early.
Where renovation money goes
Why renovations blow the budget.
Renovation blowouts of 20 to 40 per cent are routine, and it is not because builders are careless. It is because a renovation is priced against what can be seen, and the expensive things are behind plaster.
- ✓Asbestos in sheeting, eaves or vinyl that only shows up once work starts
- ✓Wiring and plumbing that cannot be left as found once you touch it
- ✓Rotted or undersized stumps, bearers and joists found at floor level
- ✓Existing work that must be brought to current standards where the new work joins
- ✓Temporary propping, staged access and trades working around a part-demolished house
- ✓Levels, junctions and roof lines that never quite line up between old and new
None of that can be priced honestly in advance, which is why renovation quotes carry allowances where rebuild quotes carry fixed sums. The per square metre cost is not really higher. The uncertainty is, and uncertainty breaks budgets.
Cost and time
What each path costs in money and months.
These are the figures we use for early feasibility. They are ranges because your block, your house and your council all move them.
- ✓Demolition of an average Melbourne home: typically $20,000 to $40,000, depending on size, asbestos and access
- ✓Permits: planning $200 to $1,500 and 4 to 8 weeks; building permit $1,000 to $5,000 and 2 to 4 weeks; demolition permit $100 to $500
- ✓A new custom home: from $500,000 for the build, with site costs, design and approvals outside that
- ✓Typical build time for a new home: 9 to 12 months on site
- ✓A full knockdown rebuild program, demolition to handover: typically 12 to 16 months
- ✓A major renovation: harder to fix, and priced with allowances for what cannot be seen yet
Note what rarely gets counted. A rebuild means renting for the whole program, because once demolition starts the site is closed for safety and insurance. A renovation often means living in the house while it happens, which saves rent and costs patience.
If your answers land in the rebuild column, the knockdown rebuild page sets out that program. If it is renovation, start at extensions and renovations. Our custom home builder Pakenham page covers both sides on established blocks, and what a custom home costs covers the build number.
Straight answers
Renovate or rebuild questions.
Is it cheaper to renovate or rebuild? +
For cosmetic or contained work, renovating is cheaper. For whole-house work, a rebuild is usually better value, because renovations at that scale routinely blow out 20 to 40 per cent once walls open and problems appear.
How do I know if my house is worth renovating? +
Count what you are keeping. If the structure, roof, wiring, plumbing and layout all need work, you are paying a premium to build a new house inside an old shell. If two or three are sound, renovate.
Do I pay stamp duty on a knockdown rebuild? +
No. You already own the land, so there is no stamp duty and no agent fees, and you keep the street, the neighbours and the school zone. That saving is often the deciding factor.
Can we live in the house during a rebuild? +
No. Once demolition starts the site is closed for safety and insurance. Most clients rent nearby or stay with family for a program that typically runs 12 to 16 months from demolition to handover.
What does demolition cost in Melbourne? +
Typically $20,000 to $40,000 for an average home, depending on size, asbestos and site access. We arrange the contractor, asbestos assessment, service disconnections and the demolition permit under one contract.
What if my house is heritage listed or in an overlay? +
Demolition may be restricted or refused, which usually makes renovation the practical path. It is a planning question worth answering before you spend on design, and we check it at the site assessment.
Will you tell me if renovating is the better option? +
Yes. Jarrod gives a straight read at the free site assessment, including when a renovation genuinely beats a rebuild for your house and budget. We would rather lose the job than start the wrong one.
Not sure which way your block goes?
A free site assessment with Jarrod: feasibility, honest costs and a straight renovate-or-rebuild answer.