Best Commercial Roofing Contractors in Ontario, CA
Compare 12 commercial roofing companies serving Ontario, CA. 1 offer 24/7 emergency service. Local crews install and service TPO (Thermoplastic), EPDM (Rubber), Modified Bitumen, Built-Up Roofing (BUR), and more. Request free quotes and hire the right contractor for your building.
Commercial Roofing Contractors in Ontario
View allOntario Roofing Services
Ontario, CA
Ontario Roofing Services provides commercial flat and low-slope roofing — TPO, EPDM, modified bitumen, coatings — for wa...
Ontario Roofing
Ontario, CA
Ontario Roofing provides commercial roof installation, repairs & free 24-hr inspections for property managers in Ontario...
B & M Roofing
Ontario, CA
B & M Roofing provides commercial roofing services in Ontario, CA, covering flat and low-slope systems for industrial, w...
Ontario City Roofing LLC
Ontario, CA
Ontario City Roofing LLC provides commercial roofing services in Ontario, CA, specializing in TPO, EPDM, modified bitume...
Sunset Roofing Services
Ontario, CA
Sunset Roofing Services offers commercial roof repair & replacement in Ontario, CA, serving LA, OC & Inland Empire with...
Micasa Pro Roofers - Ontario
Ontario, CA
Micasa Pro Roofers offers commercial roofing services in Ontario, CA, covering TPO, EPDM, modified bitumen, and coating...
Sandoval Roofing
Ontario, CA
Sandoval Roofing provides commercial flat roofing services in Ontario, CA, including TPO, EPDM, modified bitumen, and co...
Golden Roofing Ontario
Ontario, CA
Golden Roofing Ontario provides commercial roofing in Ontario, CA — TPO, EPDM, modified bitumen & coatings for warehouse...
Central Roofing Company Ontario
Ontario, CA
Licensed commercial roofing contractor in Ontario, CA offering coatings, repairs, maintenance programs & 24/7 emergency...
First Roofing
Ontario, CA
First Roofing provides commercial roof installation, replacement, and storm repair for business properties across Ontari...
Ontario Roofing and Gutter
Ontario, CA
Ontario Roofing and Gutter provides commercial flat roofing and drainage solutions in Ontario, CA for industrial, wareho...
Emmons Roof Service
Ontario, CA
Emmons Roof Service provides commercial roofing in Ontario, CA, serving warehouses, industrial, office, and retail prope...
Commercial Roofing Services Available in Ontario
Why Choose My Roofing Tech in Ontario?
Commercial-Focused Only
Every contractor listed works on commercial buildings — tpo (thermoplastic), pvc membrane, epdm (rubber), modified bitumen, and more — not residential.
Real Google Reviews
Ratings pulled from real Google Business Profiles — not anonymous form submissions.
Compare in One Place
Side-by-side roof systems serviced, ratings, and contact info — no calling around.
Free to Use
No cost to search, compare, or request quotes. Ever.
Nearby Cities
Frequently Asked Questions — Commercial Roofing in Ontario
How much does commercial roofing work cost in Ontario?
Commercial roofing costs in Ontario depend on the roof system and scope of work. Minor repairs are the most affordable, preventative maintenance programs are billed on a recurring schedule, and full replacements or installations are priced by system size and complexity (tpo (thermoplastic), pvc membrane, epdm (rubber), modified bitumen, and more).
How do I find a reliable roofing contractor in Ontario, CA?
Start by verifying the contractor holds a current state license, adequate insurance, and bonding. Confirm they're certified and experienced with your roof system. Check reviews from other property and facility managers on My Roofing Tech. Ask for references from similar properties (office, retail, industrial, warehouse). Get at least three written quotes for any major project.
Do Ontario roofing contractors offer emergency service?
Yes, many roofing contractors in Ontario offer 24/7 emergency service. Response times vary — the best operators typically arrive within 2–4 hours for urgent issues. Always confirm after-hours rates upfront, as emergency response typically carries a surcharge.
What's the best time of year to schedule roofing maintenance in Ontario?
Schedule preventative roofing inspections on a regular cadence to catch wear, failures, and small problems early — before they cause downtime. Booking maintenance during off-peak periods gives you faster scheduling and helps preserve warranty coverage.