By Blue Horizon Projects · · 7 min read
Contents
Most people arrive at this decision emotionally attached to the existing house and financially attached to the idea that keeping it must be cheaper. Both instincts deserve testing.
The real question
It isn't 'can this house be renovated' - almost any house can. It's whether the money spent keeping it buys you a better outcome than the money spent replacing it.
When renovating wins
- The structure, roof and slab are sound and well positioned on the block
- The floor plan works with modest change rather than wholesale reconfiguration
- The home has genuine character worth keeping
- Planning controls would give you a smaller or more restricted new dwelling
When rebuilding wins
- Widespread asbestos, failing waterproofing or unsafe wiring
- Poor orientation that no renovation can fix
- Low ceilings and a plan that fights every proposed change
- You want current thermal performance across the whole home
Comparing the numbers
| Factor | Major renovation | Knock down rebuild |
|---|---|---|
| Cost certainty | Lower - hidden conditions emerge | Higher - known site, known scope |
| Timeline | Often similar or longer | Predictable once approved |
| Thermal performance | Partial improvement | Full current standard |
| Warranty coverage | New work only | Whole home |
Once a renovation touches structure, wiring, plumbing and waterproofing, you are paying new-build rates for a compromised result.
Making the call
Get both paths costed at feasibility level before committing to either. A few thousand dollars of honest assessment routinely saves six figures of regret.
Frequently asked
- Do I need council approval to demolish?
- Yes. Demolition requires approval, and service disconnections plus asbestos clearance must be arranged before machines arrive.
- Can I stay in the house during a rebuild?
- No. Budget for rental accommodation for the full construction period.
