🏠 Official Rankings
10 Best Roofers in Ontario, CA (September 2026)
We compared 10 roofers serving Ontario and San Bernardino County, California, and ranked the top providers by verified reviews, ratings, and local reputation — 462 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Sandoval Roofing. Updated for September 2026.
- Roofers ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 462
- Area code
- 909
#1
⭐ 5.0 · 85 reviews
3117 Thoroughbred St, Ontario, CA 91761
#2
⭐ 5.0 · 47 reviews
600 N Mountain Ave Bldg C, Upland, CA 91786
#3
⭐ 4.8 · 111 reviews
11182 Poulsen Ave, Montclair, CA 91763
#4
⭐ 4.9 · 46 reviews
4335 E Lowell St Ste G, Ontario, CA 91761
#5
#6
#7
#8
#9
⭐ 5.0 · 10 reviews
1407 S Cucamonga Ave #2, Ontario, CA 91761
#10
Roofers listed here serve Ontario, San Bernardino County, and nearby ZIP codes including 91758, 91761, 91762, 91764, 91798.