Roof replacement cost

Roof replacement cost per square metre in Sydney

We couldn’t find a Northern Beaches roofer that publishes re-roofing rates, so these are a Sydney contractor’s. It quotes per square metre of roof surface, not floor area, and a roof is bigger than the house’s floor plan once you add the pitch and the eaves.

Published Sydney re-roofing rates

One Sydney contractor’s published rates, checked 1 October 2026. The page is undated and doesn’t say whether GST is included. It says the rates include “stripping the old roof, new sarking and standard flashings”, and that two-storey access, a pitch over 30° and complex roofs cost extra. By our arithmetic its typical totals work out at $187.50 to $225 per m² for Colorbond ($37,500 ÷ 200 and $45,000 ÷ 200), above its own “from” rate.

The same contractor publishes two more figures that help with budgeting: the range most single-storey jobs land in, and a price for replacing one section of a tile roof rather than all of it.

More from the same Sydney contractor

One Sydney contractor’s roof replacement page, checked 1 October 2026. The page is undated and doesn’t say whether GST is included. Its Colorbond page says its “from $170” rate includes “removal of the old roof, new sarking, standard flashings and a corrugated profile”, with Klip-Lok or Trimdek profiles, two storeys and a pitch over 30° costing extra.

Colorbond roof replacement cost: tile to Colorbond

Changing a concrete tile roof to Colorbond is a full re-roof: the tiles come off, the battens change to suit steel, and new sarking, sheets, flashings and capping go on. These are the published prices for the cost to replace a roof with Colorbond, with a full new tile roof for comparison:

Published per-job and national prices

Checked 1 October 2026; neither page says whether GST is included. The first two rows are a Sydney-wide contractor’s Mona Vale page, which is undated and uses the same wording as its pages for other suburbs. The last two are a national marketplace’s guides (20 and 6 January 2026). These bands sit well below the Sydney per-m² rates above; roof size, pitch, access and whether the old roof is asbestos explain much of the gap.

The Sydney contractor’s Colorbond rate of from $170 per m² covers “removal of the old roof, new sarking, standard flashings and a corrugated profile”. Concealed-fix Klip-Lok and Trimdek profiles cost more on its page, as do two storeys and a pitch over 30°. By our arithmetic, a 150 m² roof at that “from” rate is 150 × $170 = $25,500 before any of those extras.

Near the surf, ask which steel each quote is for. BlueScope recommends standard Colorbond only more than 200 m from breaking surf and Colorbond Ultra more than 100 m away, and Lysaght calls for Class 4 screws in severe exposure. None of the prices above says which grade it assumes. See Colorbond, Ultra or Zincalume near the coast.

Why the published prices are so far apart

At its “from” rate, the Sydney contractor’s 200 m² Colorbond roof would be 200 × $170 = $34,000 by our arithmetic, and its own typical figure is higher again. The Mona Vale page’s band starts at $15,000, and hipages’ national band tops out at $20,000. Several things explain much of that gap:

• Roof size. The Mona Vale page says its band depends on “roof size, pitch and complexity” but doesn’t give a size. A small cottage roof and a 250 m² hip roof can both be “a re-roof”.
• What’s included. The Sydney per-m² rate includes stripping the old roof, new sarking and standard flashings. A lower price may not, so check each quote lists them.
• Sydney versus national. hipages’ figures are national averages, and its own guide says prices are higher in major cities like Sydney.
• Asbestos. If the old roof is asbestos cement, a licensed removalist takes it off first, and that’s priced separately.

What pushes the price up

Pitch and storeys

The Sydney contractor prices two-storey access and a pitch over 30° as extras. Higher and steeper roofs need more edge protection and scaffold: SafeWork NSW treats work with a risk of a fall of more than 2 metres as high-risk construction work.

Access to the roof

Sheets, tiles, bins and scaffold all have to get to the roof. A steep block, a long set of stairs or no room for a bin on the street means more handling and more time, so mention it when you ask for a quote.

Asbestos removal

Removing more than 10 m² of bonded asbestos needs a licensed asbestos removalist in NSW, which covers any whole fibro roof. See the prices below.

The roof frame and battens

Rotten battens or timbers found once the old roof is off add to the job. Ask how the roofer will price anything they find, and to agree it with you before they fix it.

Coastal-grade steel and screws

Colorbond Ultra, stainless steel and Class 4 screws suit homes close to the surf. None of the published prices we found says what the upgrade adds, so ask for the steel grade and screw class in writing.

Gutters, downpipes and extras

The Sydney rates include standard flashings but don’t mention gutters, downpipes, fascia, skylights or whirlybirds. If those are being replaced too, they’re extra. See gutters and downpipes.

Asbestos roof removal cost

The NSW EPA says: “If your house was built before 1990, it probably has asbestos-containing materials.” Northern Beaches Council’s cut-off is homes “built or renovated before 1987”. If your roof is corrugated fibro from that era, budget for removal before the new roof:

Published asbestos removal prices

Removal only, not the new roof. The first two rows are a Sydney asbestos removal contractor’s cost page (first published 17 September 2025), which also lists testing at $200 to $600 and a clearance at $300 to $800. The last two are a national marketplace’s guide (updated 27 November 2025), which doesn’t say what size of roof its total assumes. Checked 1 October 2026; neither says whether GST is included.

SafeWork NSW requires a licensed removalist for more than 10 m² of bonded asbestos and recommends one for any amount. It also says never to use high-pressure water on asbestos roofs, and warns they can be brittle enough to fall through. Ask for the removal, disposal and any clearance as their own lines on the quote.

Contracts, HBCF insurance and deposits

Many re-roofs cost more than $20,000, which brings in the strongest NSW protections:

• Deposit: “The maximum amount of a deposit for residential building work is 10% of the contract price.”
• HBCF insurance over $20,000 including GST. icare says the roofer needs Home Building Compensation Fund cover before they “Start work, or take any payment for the project, including a deposit”. Ask for the certificate.
• Cooling-off over $20,000: you can withdraw within five clear business days of being given the contract.
• Written contract over $5,000 including GST, naming the licence holder and their contractor licence number. Between $5,000 and $20,000 it’s a small works contract; over $20,000, a full home building contract.

What needs a licensed roofer

NSW Fair Trading says you must hold a contractor licence to “carry out, advertise or contract for” work over $5,000 in labour and materials, including GST, and every re-roof price above is over that. The category depends on the new roof: roof plumbing for Colorbond and other metal roofs, gutters and flashings; roof tiling for concrete and terracotta tiles, sarking and battens; and roof slating for slate. Asbestos removal needs a SafeWork NSW licence. Check any licence on the Service NSW licence register.

Comparing re-roofing quotes

Two quotes for “a new Colorbond roof” can include very different things. Ask each roofer:

• Is stripping and disposing of the old roof included?
• Is it new sarking and battens, and are the flashings, ridge capping and valleys new?
• Which profile, which steel (standard Colorbond, Ultra or stainless) and which screw class?
• Is scaffold or edge protection in the price?
• Is asbestos removal needed, and is it priced as its own line?
• Are gutters, downpipes and fascia included?
• Does the price include GST?
• What’s the licence number and category, and will you see the HBCF certificate before paying a deposit?
• Does the job need council approval, or is it exempt development?

Common questions