Roofing contractor
Cowan Roofing Inc.
101 W American Canyon Rd, American Canyon, CA 94503
Listed under Vallejo, CA
- Google average
- 4.2
- Ratings counted
- 5
- One and two star
- 1 of 5
- California median
- Not comparable
The first three are Google’s own figures for Cowan Roofing Inc., read on 24 September 2026; the share is of every rating Google has counted, not of the review texts on this page. The median is ours — the middle figure among the California roofers we list with enough ratings to compare.
Rating breakdown
| 5 | 4 | 80% | |
|---|---|---|---|
| 4 | 0 | 0% | |
| 3 | 0 | 0% | |
| 2 | 0 | 0% | |
| 1 | 1 | 20% |
Too few ratings to compare against other roofers — at 5 ratings a single unhappy customer moves this figure by several points.
The critical reviews
The one and two-star reviews, first. These are what a star average hides, and they are the reason this page exists.
The only one or two-star review we hold for Cowan Roofing Inc..
- 1 out of 5Alfred Lee4 years ago
Everything was going great until it wasn't. Came and started the job as promised. Paid half of the agreed upon amount when they were about half way done. Paid the other half as they were finishing up. Unfortunately for me, they made a …
Google cut this review short. The full text is on their Google profile.
What reviewers keep mentioning
Topics Google extracted from this business’s reviews, with how many mention each. These are words that appeared in reviews, which is not the same as a service the business sells.
- knowledgeable staff2
- quality work2
- roof repair2
Other reviews we hold
3 more of the 4 reviews we hold text for, most recent first. We do not hold every review Google has.
- 5 out of 5Dave Alvareza year ago
Jim and his team recently replace my roof. I received a few different estimates and decided to go with Cowan roofing based on his knowledge and energy. My wife and I are extremely satisfied with the level of service they provided. The team …
Google cut this review short. The full text is on their Google profile.
- 5 out of 5Bryan Howze2 years ago
Great, quality work in a timely manor, the foreman on the job does an amazing job
- 5 out of 5Steve Dubin2 years ago
I recently had the pleasure of working with Cowan Roofing, and I'm very happy with the results. Jim, the owner, brings an impressive depth of knowledge to his projects. His understanding of roofing assemblies, materials, and building codes are bar none. What really stood out to me was Jim's promptness and professionalism. From the original quote/ bid meeting to the last day on site, he was always on time and communicative. He took the time to explain every step, making sure I felt confident in the decisions being made. Thank you, Jim- and the team at Cowan Roofing- my roof looks great and I know it's built to last. I highly recommend Cowan Roofing to anyone in need of roofing services in and around Napa County.
What Cowan Roofing Inc. says about itself
Taken from the business’s own website. We have not checked any of it. These are quotes, not credentials — a roofer writing “licensed and insured” on their homepage is not evidence that they are.
Licensed
“…is comprised of licensed, insured and bonded roofers. A…”
License number shown
“…License #: 1075580 Cowan Roofing Inc. is comprised of…”
Family owned
“…Diligence. Cowan Roofing Inc. is a family owned and operated business in Napa Valley.…”
Their site also states: insured, bonded.
Other roofers in Vallejo
Ranked by how many ratings Google has counted.
| Roofing contractor | Google average | Ratings counted | One and two star | Contact |
|---|---|---|---|---|
| Northern California Roofing Co.cost, no leaks, respectful staff4.7126 ratings6.3% one and two star(707) 447-5655 | 4.7 | 126 | 6.3%8 of 126 | (707) 447-5655 |
| Roof Doctors Solano Countyknowledgeable staff, inspection, courteous staff4.788 ratings5.7% one and two star(707) 674-5775 | 4.7 | 88 | 5.7%5 of 88 | (707) 674-5775 |
| Roofmastersthorough inspection, outstanding job, skylight replacement4.750 ratings8.0% one and two star(707) 447-7663 | 4.7 | 50 | 8.0%4 of 50 | (707) 447-7663 |
| Jorge Lopez Roofing Incroof replacement, attention to detail, impeccable work4.838 ratings5.3% one and two star(415) 823-9013 | 4.8 | 38 | 5.3%2 of 38 | (415) 823-9013 |
| IronStormline Roofing Groupinspection, home, leak4.828 ratings0% one and two star(661) 590-8200 | 4.8 | 28 | 0%0 of 28 | (661) 590-8200 |
| Triple T Rejuvenationroof work, quality work, timeliness5.027 ratings0% one and two star(707) 914-1959 | 5.0 | 27 | 0%0 of 27 | (707) 914-1959 |
Where this page comes from
Every figure above is Google’s, captured on 24 September 2026. The star average and the 5 ratings behind it are counted by Google across all of its reviews. The review text on this page is a sample — we hold 5, of which 4 have any text — and it is not everything Google shows.
Roof Warden does not verify licenses, bonds, insurance or workers’ compensation cover, and nothing on this page should be read as though we had. Confirm those directly with the contractor and with your state or provincial licensing body before you hire anyone.
There is not much data on Cowan Roofing Inc.. A short record here means our capture found little — not that there is nothing to find, and not that the business is new or inactive.