01Ottawa · Roofing
Roofing cost in Ottawa, ON
Membrane or shingle assembly, insulation, vapour control and flashing. Roof cost is measured on roof area and detail count, so a small roof with many penetrations can price above a large plain one. In Ottawa, the band moves with the curated local cost factor of 0.95× the national baseline.
02The local rate
Commercial hourly
$81 – $138
Ottawa adjusted
General hourly
$71 – $119
House-scale work
Commercial $/sf
$11 – $17
5% of hard cost
General $/sf
$14 – $22
From the residential band
The per-square-foot figures come straight from the curated Ottawa hard-cost bands, taken at 5% for a new build and 0% for a fit-out. Nothing on this page is a separate estimate — it is the same market data, sliced by trade.
Local context: Federal tenant fit-outs set the quality benchmark in Ottawa, pulling office TI budgets above the provincial average.
03General versus commercial
The two segments in Ottawa
| Segment | Hourly | New build $/sf | Fit-out $/sf |
|---|---|---|---|
| General / residential | $71 – $119 | $14 – $22 | — |
| Commercial | $81 – $138 | $11 – $17 | — |
What the quoted rate covers
Normally: Membrane or shingle assembly and underlayment; Insulation and vapour control to specification; Flashing, edge metal and standard penetration details. Normally not: Structural deck repair discovered after tear-off; Fall-arrest anchorage and guardrail systems; Extended manufacturer warranty inspections; Snow and ice removal during the work.
What moves roofing pricing here
Penetration count: every curb, drain and vent is a detail priced individually, and details are where leaks and cost both live. Insulation R-value: energy code minimums have raised commercial roof insulation cost materially over the last decade. Tear-off versus re-cover: disposal and unexpected deck repair are the two largest variables. Access and staging on an occupied building adds hoisting and protection cost.
Buildlor facts
- Ottawa runs at 0.95× the national construction cost baseline.
- Roofing is 5% of new-build hard cost.
- Roofing is 0% of fit-out hard cost.
04Questions
How much does roofing cost in Ottawa?
Roofing in Ottawa is billed in a band. The hourly and per-square-foot figures on this page are the national bands adjusted by the curated Ottawa cost factor, which is the same factor the Ottawa market page uses.
Is commercial roofing priced differently in Ottawa?
Commercial roofing is a low-slope membrane assembly with insulation to a code R-value, tapered drainage, curbs, warranty inspection and safety anchorage. Residential roofing is largely a steep-slope shingle re-cover.
Does Buildlor do the work?
No. Buildlor publishes cost data. Use these bands to sanity-check a quote before you tender, then price the full project in the Cost Stack Builder.
Buildlor Construction Cost Index · Last updated 2026-01-15 · Maintained by Buildlor Cost Desk
Scope: Roofing, Ottawa, ON
Not advice — Buildlor is a data publisher. We do not bid, price, estimate, or build work, and nothing here is a quote, a tender price, or construction advice. Figures are indicative order-of-magnitude benchmarks for early budgeting and must be confirmed by a qualified cost consultant, quantity surveyor, or general contractor before you rely on them. About Buildlor