How the satellite estimate works
Aerial survey data
Your roof has already been mapped by high-resolution aerial imagery and elevation scanning. We read that data for your address: no drone, no site visit, no waiting.
True surface area
Flat "bird's eye" measurements under-measure pitched roofs. We use each roof plane's real pitch, so a 22° roof is priced on its true surface area, not the smaller footprint you see from above.
Every aspect counted
Hips, valleys and multiple facets add cutting, flashing and labour. The estimate sees each roof plane and its orientation, so complex roofs are priced like complex roofs.
What moves a Sydney re-roof price
Material is the headline, Colorbond and concrete tile sit at the accessible end, and terracotta costs more, but the same roof can vary thousands of dollars either way on the details. Pitch above about 30° slows every trade on the roof. Two-storey access adds scaffolding. Old roofs can hide broken battens, missing sarking or, in pre-1990 homes, asbestos that must be handled by licensed removalists. And any honest replacement quote should tell you whether you actually need one: restoration or repair is often the better-value call, and ours always states it in writing.
Roof replacement cost in Australia: what to budget in 2026 (Sydney benchmark)
Every roof is different, that's the point of measuring yours, but these are realistic Sydney budget ranges by roof size, at standard pitch on a single-storey home, including removal of the old roof, sarking and standard flashings. Two-storey access, pitch over 30° and complex hip-and-valley roofs add to these figures, and the calculator above applies those loadings automatically to your measured roof.
| Roof surface area | Colorbond / metal | Concrete tile | Terracotta tile |
|---|---|---|---|
| 150 m² (smaller 3-bed) | $28,000 to $34,000 | $31,000 to $37,000 | $34,500 to $41,500 |
| 200 m² (typical 3 to 4 bed) | $37,500 to $45,000 | $41,500 to $49,500 | $46,000 to $55,000 |
| 250 m² (larger 4-bed) | $47,000 to $56,500 | $52,000 to $62,000 | $57,500 to $69,000 |
| 300 m² (large family home) | $56,000 to $67,500 | $62,000 to $74,000 | $69,000 to $83,000 |
Ranges include cutting waste (10% metal, 15% tile) at our current supply-and-install rates. Indicative only: measure your actual roof above for your address, and book a free inspection for a fixed written quote.
Roof replacement cost per square metre in Sydney
As a rule of thumb from our current pricing: Colorbond and metal re-roofs start from about $170 per m² of roof surface, concrete tile from about $180 per m² and terracotta from about $200 per m², supply and install, including stripping and disposing of the old roof. Watch out for per-square-metre figures quoted on the footprint of the house: a pitched roof's true surface is larger than its footprint (about 8% larger at 22°, 15% at 30°), which is exactly why underquoted jobs grow on inspection. The calculator above measures true surface area from the start: use it as a roof replacement cost estimator for your exact address instead of a rule of thumb.
Colorbond vs tile: which replacement makes sense?
Colorbond is lighter, faster to install, and the usual pick when a tile roof's battens are tired: the structural load drops when you switch. Concrete tile is the cost-effective like-for-like swap on most Sydney homes, while terracotta holds its colour for decades and suits period streetscapes. If the roof is structurally sound and the issue is cosmetic, a restoration can cost a quarter of a replacement: our quotes always state whether that's the smarter option, with the price included.
Calculator questions
How accurate is a satellite roof measurement?
Typically within a few percent on area, pitch and orientation for most Sydney homes: plenty for a realistic budget range. The free inspection confirms exact scope and a fixed written price.
How much does a roof replacement cost in Sydney?
Most single-storey Sydney homes fall between roughly $28,000 and $55,000 depending on roof size, pitch, access and material, with larger and two-storey homes running higher (see the ranges by roof size above). That's why a measured estimate beats a rule of thumb: this tool prices your actual roof.
Is the estimate an obligation?
No. No contact details are needed to see your price. If you want a fixed quote, book the free inspection.
Do you offer finance for roof replacements?
Yes. Finance options are available, so a replacement can be paid off over time instead of up front. Ask what's currently on offer when you book your free inspection.
What if there's no satellite data for my address?
Trace your roof outline on the map instead: click the corners, pick your pitch, and the calculator prices it the same way.
How long does a roof replacement take?
Most single-storey Sydney homes take 3 to 5 working days from strip to finished flashings, weather permitting; larger or two-storey homes can run to a week or more. The roof is never left open overnight.
Do I need council approval to replace my roof in Sydney?
Like-for-like re-roofing is generally exempt development in NSW. Changing material, for example tile to Colorbond, usually remains exempt but can involve structural checks, and heritage areas have extra rules. We confirm what applies to your property as part of the free inspection and quote.
Choosing a Colorbond colour? Colour does not change the price, but it changes heat and BASIX. See our guide to all 22 Colorbond roof colours. Want the pitch in degrees, ratio and rafter length? Use the roof pitch calculator.