New Construction Roofing in Toronto & the GTA

Roofing a new structure is a different job from reroofing an old one, and quoting it works differently too. There's no tear-off and no surprises hiding under old shingles — the deck is fresh, the lines are straight, and the roof can be built right from the first nail. Whether it's a full custom home, an addition roofing tie-in, or a garage roof installation, what you're buying is a clean install and details that will still be dry in 2050.

The technical part that separates good new build roofing from adequate: the tie-ins and transitions. An addition has to marry into the existing roof — matching or deliberately contrasting materials, weaving or step-flashing the junction, and handling the valley where two rooflines meet, which is exactly where lazy work leaks first. New structures and additions are permit work under the Ontario Building Code, and the roof gets inspected as part of the build, so underlayment, ice and water shield coverage and ventilation all have to meet spec, not just look finished.

We quote new construction roofing for homeowners and builders alike: material and system options, the full dry-in and finish scope, and coordination with your framer and building inspector's schedule. One honest note for addition projects — if your existing roof is within a few years of replacement, doing both at once gets you one continuous roof and one mobilization instead of a visible patchwork and two bills.

• Review of plans or the framed structure, with material and system recommendations
• Dry-in stage: ice and water shield at eaves and valleys, synthetic underlayment, drip edge
• Finished roof installation — shingles, metal or other specified system — to manufacturer and OBC spec
• All flashing work: chimneys, walls, skylights, and step-flashed tie-ins to existing structures
• Ridge venting and intake ventilation coordinated with the attic insulation plan
• Valley construction where new rooflines meet existing ones on additions
• Scheduling around framing, inspection and other trades
• Cleanup and disposal of packaging and offcuts

• Structure type and size — a detached garage, a rear addition and a custom home are different projects
• Roof design complexity, since valleys, dormers and steep architectural pitches add labour
• Material system chosen, from standard architectural shingles to standing seam metal
• Tie-in work where an addition meets the existing roof, including any matching of aged materials
• Ventilation design required by the insulation approach (vented attic versus cathedral ceilings)
• Timing and staging around other trades and inspection windows
• Site access and material hoisting on larger builds

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.