How much does roof replacement cost in Perth? (2026 guide)
The honest answer is a range, and anyone who gives you a single number over the phone is guessing. But "it depends" is a useless answer when you're trying to plan, so here's how the cost actually works, with indicative ranges you can sanity-check quotes against.
Indicative ranges for Perth homes
| Job | Indicative range |
|---|---|
| Single storey 3x2, tiles to Colorbond | $30,000 to $45,000 |
| Single storey 4x2, tiles to Colorbond | $45,000 to $65,000 |
| Double storey, tiles to Colorbond | add roughly 15 to 25 percent |
| Metal to metal re-roof (same size home) | typically 10 to 20 percent less than tile removal jobs |
| Asbestos removal component | adds several thousand to $15,000+ depending on size and condition |
The six things that drive the price
1. Roof area and pitch
Bigger roof, more material and labour. Steeper pitch, slower and more careful work. Note that roof area is bigger than floor area: a 180m² house might carry a 220m²+ roof once you account for pitch, eaves and verandahs.
2. What's coming off
Stripping concrete tiles is heavy, slow work and the disposal weight is enormous. Old metal sheeting comes off faster. Asbestos is its own category with a licensed removal process and strict disposal rules. What's on your roof now matters as much as what's going on.
3. What's going on
Colorbond comes in different grades and profiles, and coastal suburbs need higher corrosion protection. Then there's what goes underneath: sarking (the insulating blanket or membrane under the sheets), new battens, and insulation upgrades. This is where cheap quotes hide their savings.
4. Storeys and access
Double-storey homes need more scaffolding, more safety setup, and more time moving material. A tight site with no side access does too.
5. Structural condition
Roof timbers and battens are only fully visible once the old roof comes off. A good quote tells you what timber allowance is included and what happens if more is needed. A bad quote stays silent and surprises you mid-job.
6. The extras
Solar panels off and back on. Skylights. Whirlybirds. New gutters and downpipes (usually worth doing at the same time). Satellite dishes and aerials. Each is small, together they add up.
Why quotes for the same roof differ by $15,000
When you get three quotes and they're wildly different, it's almost never because one company has magic prices. It's because they're quoting different jobs:
- One includes sarking, one doesn't.
- One includes a realistic timber allowance, one includes none and will charge you per metre mid-job.
- One includes new gutters, one is reusing your old ones.
- One is using a thicker grade of steel or a coastal-rated coating.
- One includes full disposal and site clean, one leaves a skip bill with your name on it.
Before comparing bottom lines, line up what's actually included. Ask every quoter the same question: "What happens if you find rotten timber?" The answer tells you a lot about the company.
How to budget sensibly
Take the realistic range for your home, then hold back a contingency of around 10 percent for what's found when the old roof comes off. If the quote already includes a written timber allowance and a fixed price for extras, your contingency can be smaller.