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Roof Estimate Calculator (Canada)

Free roof estimate calculator for Canada. Build a contractor-style quote with line-item costs, overhead, profit, contingency and HST/GST/PST — plus a good/better/best 3-tier offer and 30/40/30 progress draws.

Roof Estimate Calculator

Build a contractor-style itemised estimate: direct cost, overhead, profit, contingency and tax — plus a 3-tier good/better/best proposal, crew schedule and draw schedule.

Markup chain (contractor inputs)
Estimated proposal total
$35,502
$14/sq ft installed · Architectural asphalt shingle · 24.6 squares
Crew of 4 → ~7.3 working days · 235 labour hours · gross margin 20.5%
Good (basic finish)
$30,532
3-tab / utility-grade
Better (recommended)
$35,502
As specified above
Best (premium)
$41,892
Designer + extended warranty
Itemised line breakdown
Material
$4,778
Labour
$8,145
Tear-off
$3,139
Disposal
$1,840
Underlay
$1,679
Deck repair
$930
Code upgrades
$1,734
Permit
$396
Direct cost
$22,640
+ Overhead
$4,075
+ Profit
$3,206
+ Contingency
$1,496
+ Tax
$4,084
Draw schedule (30 / 40 / 30)
Deposit (signing)
$10,651
Midpoint (dry-in)
$14,201
Final (sign-off)
$10,651

How this roof estimate calculator works

Most cost calculators give you a single number. A real Canadian roofing estimate has six layers stacked on top — direct cost, overhead, profit, contingency, sales tax, and the schedule of progress draws. This calculator shows all six.

Enter the building footprint in square feet (Canadian tradition uses imperial for residential roof area), pitch in X/12, the material, complexity and region, then adjust the markup chain to match the kind of contractor you’re comparing.

The output is a written-quote-style proposal: itemised line breakdown in CAD, three-tier good/better/best, gross margin %, a labour-hour estimate based on crew size, and a 30/40/30 progress-draw schedule.

The contractor markup chain — how the price gets built

direct cost   = materials + labour + tear-off + disposal + ice & water shield + deck repair + permit
+ overhead    = direct × overhead%        (truck, public liability, WSIB/CSST/WCB, marketing)
+ profit      = (direct + OH) × profit%
+ contingency = subtotal × contingency%
+ sales tax   = subtotal × HST/GST/PST%
= grand total

The markup is multiplicative. A 20% overhead on a C$25,000 direct cost is C$5,000, not C$2,500 — which is why a C$30,000 materials-and-labour figure on a survey turns into a C$42,000 final invoice with HST in Ontario. The markup chain pays the truck, the C$5m public-liability cover, the WSIB/CSST premium (up to 8% of payroll in some provinces), the slow-month payroll and the 1-in-5 jobs that uncover hidden ice-dam rot.

The math, derived from first principles

slope factor = sqrt(1 + (rise/run)²)
roof area    = footprint × slope factor

A 2,200 sq ft footprint at 6/12 pitch has a slope factor of 1.118, so 2,460 sq ft of surface (24.6 squares). Architectural asphalt material runs about C$2.20/sq ft installed (×1.05 vs US baseline × labour 0.88), labour about C$2.80/sq ft installed; tear-off adds C$1.30/sq ft and disposal C$0.75/sq ft for one layer. With ice & water shield (mandatory NBC 9.26.5 in eaves and valleys), deck repair allowance and code upgrades, the direct cost lands around C$23,500.

Apply the markup chain (18% overhead, 12% profit, 5% contingency, 13% HST in Ontario) and the proposal total comes out to roughly C$36,800. The HST alone is about C$4,200 of the gap from direct cost.

Region tier — provincial cost spreads

TierMultiplierExamples
Low0.85Prairie towns, Atlantic regional, Northern Ontario, regional QC
Mid1.00Calgary, Edmonton, Ottawa, Winnipeg, Halifax, Quebec City
High1.28Toronto, Vancouver, Montreal Island, Lower Mainland BC

The high-tier multiplier captures higher labour rates (unionised IUOE/Carpenters wages 18–25% above other markets), parking permits ($30–$60/day in inner Toronto/Vancouver), condo-board access fees, BC seismic uplift requirements, and the licensing and bonding overhead that thins the contractor pool. CRCA’s 2026 cost survey shows the spread between regional and Toronto/Vancouver pricing is now 26%.

Crew size and labour-hour estimate

The calculator divides labour cost (labour + tear-off lines) by the burdened hourly rate (default C$48/hr — covers wages, EI, CPP, WSIB/CSST/WCB and tooling), then divides by crew size × 8 hours to estimate working days.

A 4-person crew on the 2,200 sq ft architectural reroof above pulls roughly 170 labour-hours, so 5–6 working days. That matches the CRCA technical bulletin benchmark of 4–5 squares stripped and re-laid per crew-day on a moderately complex residential job.

Permit and inspection — what’s required across Canada

Per NBC 2020, any reroof exceeding 30% of the existing roof area or replacing structural elements requires a building permit. Most municipalities require an in-progress inspection after tear-off (verifying deck condition and ice & water shield placement) and a final inspection before insurance restoration claims pay out. The calculator estimates the permit at 3% of materials+labour or a C$550 floor.

Some jurisdictions are more expensive:

  • Toronto: building permit + Toronto Building inspections C$700–C$1,400.
  • Vancouver: BC Building Code permit + heritage-zone overlay where applicable C$500–C$1,200.
  • Montreal Island (CCQ): licensed RBQ contractor required, plus borough permit C$400–C$900.
  • Atlantic provinces (NS/NB/PE/NL): 15% HST, otherwise simpler permit regime.

The contractor must hold the appropriate provincial licence/registration: ON (no general licence — but TSSA for gas-line work, ESA for electrical), QC (RBQ licence mandatory), BC (Homeowner Protection Act 2-5-10 warranty for new build only), AB (Master Roofer through ARCA), MB/SK (no provincial licence — municipal business licence only).

Progress payments — what’s normal

Most CRCA contractors use 30/40/30:

  • 30% deposit on signing — locks the start date, covers material deposits.
  • 40% midpoint on dry-in completion — sheathing repair done, ice & water shield down, underlayment installed.
  • 30% final on completion and inspection sign-off.

Quebec’s CCQ requires contracts over C$25,000 to be in writing with a 10-day cancellation period. Ontario CPA 2002 requires written contracts over C$50. Always pay by EFT, Interac e-transfer or credit card with a paper trail — never pay cash. Credit-card chargeback is your strongest recourse if a contractor disappears mid-job.

The 3-tier good/better/best

  • Good (86%): 3-tab asphalt (Owens Corning Supreme, GAF Royal Sovereign), 25-year manufacturer guarantee.
  • Better (100%, recommended): architectural shingle (GAF Timberline HDZ, IKO Cambridge), 30-year, NBC 9.26.5 ice & water shield in eaves and valleys, balanced ridge + intake ventilation.
  • Best (118%): designer asphalt (GAF Glenwood, IKO Royal Estate) or metal standing-seam (Vicwest, IDEAL Roofing), 50-year material + 10-year workmanship.

Sources used in this calculator

  • CRCA (Canadian Roofing Contractors Association) — 2026 contractor cost index, technical bulletins.
  • CASMA (Canadian Asphalt Shingle Manufacturers Association) — installation guidelines.
  • NBC 2020 Section 9.26 — roofing assemblies, ice & water shield placement (9.26.5).
  • NECB 2020 — energy efficiency requirements for retrofits.
  • CSA A123.1 / A123.21 — asphalt shingle and wind-resistance standards.
  • Provincial codes — OBC (Ontario), BCBC (BC), Code de construction du Québec, Alberta Building Code.
  • HomeStars 2026 cost report and Renomii survey — homeowner-survey medians.

Use this calculator alongside the others

For a single material-cost estimate without markup, use the roof cost calculator. For a low/mid/high consumer cost band with insurance ACV/RCV, use the roof replacement cost calculator. To compare materials side by side, use the roofing cost calculator. When you’ve gathered three real tenders, compare them line by line against this output and ask each contractor to justify any line more than 15% off.

Frequently asked questions

What's the difference between an estimate and a quote in Canada?
An estimate is a non-binding figure based on the information the contractor has at survey. A quotation, once accepted in writing, becomes a contract under provincial consumer-protection law (Ontario Consumer Protection Act 2002, Quebec CCQ, BC Business Practices and Consumer Protection Act). CRCA member contractors typically issue a written estimate after the survey and convert to a fixed quote once the deck is exposed. The number this calculator gives you is in the estimate range — useful for budgeting and comparing tenders.
How much overhead and profit do Canadian roofing contractors add?
Most CRCA member firms run 16–24% overhead and 10–14% net profit. Sole-trader operators run 10–14% overhead but limited capacity; large national groups run 25–35% because of marketing, financing and CSST/WSIB compliance overheads. The calculator defaults to 18% overhead and 12% profit.
Is HST/GST/PST included in the estimate?
Yes — the calculator adds the appropriate provincial sales tax. Default is 13% (Ontario HST). Adjust for your province: NS/NB/PE/NL 15% HST; QC 14.975% (5% GST + 9.975% QST); BC 12% (5% GST + 7% PST); MB 12% (5% GST + 7% PST); SK 11% (5% GST + 6% PST); AB 5% (GST only); YT/NT/NU 5% (GST only). On residential reroofs the tax is a final cost — there's no input-tax credit available to homeowners.
Why does every Canadian roof estimate include a contingency?
Stripping a roof in any Canadian climate regularly exposes ice-dam-rotted decking at the eaves, missing or perished ice & water shield (mandatory under NBC 9.26.5 for the past 20 years — older homes don't have it), or rafter rot from poor ventilation. CRCA's 2026 contractor survey reports 74% of reroofs uncover at least one extra-cost defect. The calculator defaults to 5% contingency.
Is tear-off priced separately from the new roof?
Yes — tear-off is its own line item in most Canadian estimates because the work is physically different (bin rental, manual handling, snow / ice removal in winter) and because some clients arrange dumpster rental themselves. The calculator shows tear-off and disposal as standalone lines. Pre-1990 homes may have asbestos-containing roof felt and require an inspection before removal — budget C$400–C$1,200 extra if not yet cleared.
How does the 3-tier good/better/best work in Canada?
Good is a budget option (3-tab asphalt, 25-year manufacturer guarantee, basic ridge vent). Better is the specified scope (architectural shingle, 30-year, NBC 9.26.5 ice & water shield in eaves and valleys, balanced ventilation). Best is a premium upgrade (designer asphalt, metal standing-seam, 50-year material + 10-year workmanship, full system warranty). The calculator approximates each tier at 86% / 100% / 118% of the better total.
What's a normal progress-payment schedule in Canada?
Most CRCA contractors use 30% deposit on signing, 40% on dry-in completion, 30% on final inspection sign-off. Quebec's CCQ rules require contracts over C$25,000 be in writing with a 10-day cancellation period. Ontario requires written contracts over C$50 under the CPA 2002. Always pay by EFT/Interac e-transfer or credit card — never pay cash. Section 75-equivalent protection is limited in Canada, so credit-card chargeback is your best recourse.
Why does the same roof cost more in some regions?
The calculator uses three region tiers — low (×0.85), mid (×1.00), high (×1.28). Low covers most prairie towns, Atlantic regional, Northern Ontario. Mid covers most metro centres — Calgary, Edmonton, Ottawa, Winnipeg, Halifax. High covers Toronto, Vancouver, Montreal Island and the Lower Mainland. Toronto/Vancouver pricing reflects unionised labour rates, parking permits, condo-board access fees on multi-unit buildings, and provincial OH&S overheads.

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