RoofRangeBaseCommercial roof cost calculator
Commercial roof pricing spans bigger flats — TPO, EPDM, modified bitumen — often with insulation recover, drains, and parapets that residential porch math oversimplifies. This calculator uses the commercial band (about $600 / $950 / $1,400 per square installed as of 2026-07). Fifty squares at mid with tear-off land near $55,000 before night work or ISO recover shove you toward high. Small garage flats may fit rubber or TPO pages better. Use this when bids talk square footage like a building asset, not a shingle redo. Planning math only — no commercial lead marketplace.
Runs in your browser No signup Estimate only — not a contractor quote
Material locked for this page: commercial
Tear-off
Remove existing roof before install
Low
$14,000
Mid
$22,000
High
$33,000
When to use — and when not to
When to use
Strip mall, warehouse, or office flat quotes by square. Comparing recover bids that include insulation board. Budget conversations before you invite commercial roofers.
When not to
Residential porch EPDM → rubber roof cost calculator. Pitched shingle house → roof replacement cost. Inspection visit only → roof inspection cost. Product-named TPO on a small lid → TPO roof cost calculator.
Assumptions
Commercial $600 / $950 / $1,400 per square installed (2026-07). Tear-off context varies — confirm on bids. Full insulation recover may need mid/high bias outside the default mid.
Worked examples
50 squares commercial mid, tear-off on
Mid ≈ 50 × ($950 + $150) = $55,000
Mobilization and night work can push real bids above mid.
50 squares commercial high (insulation recover)
High ≈ 50 × ($1,400 + $250) = $82,500
ISO and drain work often drive commercial jobs high.
How it calculates
commercial ≈ squares × commercial_$ (+ tearoff_$ when enabled)
Commercial field band on measured flat squares — membrane recover scope, not shingle tear-off alone.
- Enter commercial roof squares from plans or bid sheets (100 sq ft per square).
- Read low / mid / high (~$600 / $950 / $1,400 per square as of 2026-07).
- Bias high when insulation recover, tapered crickets, or drain rebuild is in scope.
- Compare unit $/square on roofing cost per square when bid packets use that language.
Common traps
- Recover versus full tear-off changes scope — confirm on bids.
- Insulation wet-out expands jobs mid-project — keep contingency.
- Warranty maintenance requirements may affect system choice — not priced here.
- Residential flat pages understate parapet and drain detail on big fields.
Next tool
TPO product → TPO roof cost calculator.
Small residential flat → flat roof replacement cost.
Unit math → roofing cost per square.
FAQ
Our 2026-07 commercial band runs about $600 low, $950 mid, and $1,400 high per square installed. Fifty squares with mid tear-off land near $55,000 mid before insulation recover or drain rebuild.