Santa Rosa Based, Serving Sonoma County 
(707) 540-2592 
Mon-Fri: 7AM–5PM | Sat: 8AM–2PM | Sun: Closed
Roofing Contractor in Cotati, CA
Mario Contreras Roofing serves homeowners and business owners in Cotati with dependable roofing work backed by over 20 years serving Sonoma County. Cotati is a small, tight-knit city and most of its housing was built between the 1950s and 1980s. That era of construction means a lot of homes here are carrying roofs that are at or past the end of their original lifespan — and many homeowners do not realize it until a leak shows up.
Whether you are near Cotati's distinctive hexagonal downtown plaza, off Old Redwood Highway, or anywhere else in the city, we offer roof repair, roof replacement, roof inspections, gutter installation, and more — for homes and commercial buildings — with honest pricing and no pressure.
- 20+ Years roofing homes and businesses throughout Sonoma County including Cotati.
- Lic. Fully licensed and insured in California on every job we take.
- ES/EN Bilingual service in English and Spanish for Cotati homeowners.
Why Cotati Homeowners Choose Mario Contreras Roofing
Cotati sits between Rohnert Park and Sebastopol and shares the inland climate of central Sonoma County — hot summers, wet winters, and enough temperature swing to put real wear on roofing materials over time. Most of the homes here were built in the same era, which means a large portion of the housing stock is due for roofing attention around the same time. We help Cotati homeowners get a clear picture of where their roof stands before a small problem becomes a big one.
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Honest Estimates
We tell Cotati homeowners what their roof actually needs. If a repair is the right call, we will recommend that — we are not here to sell a replacement before it is warranted.
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20+ Years Local Experience
We have worked roofs across Sonoma County for over two decades, including many homes in Cotati built in the postwar and mid-century era. We know what to look for on this housing stock.
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Licensed and Insured
Every job in Cotati is fully covered. Mario Contreras Roofing is licensed and insured in California so you are protected on every project from start to finish.
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Clean Job Sites
We protect your property while we work and do a thorough cleanup before we leave. Your yard and driveway are left the way we found them.
Roof Repair, Replacement, and More for Cotati Homes
Most homes in Cotati were built during a concentrated period of development from the 1950s through the 1980s. Composition shingle was the standard roofing material throughout that era, and those original systems are now well past their typical 25 to 30 year lifespan. Homes along West Sierra Avenue, La Plaza, and the streets surrounding the downtown area are prime candidates for a full inspection — and many are overdue for replacement.
Cotati's summers are warm and dry, and the winters bring consistent rain from the north. That pattern of seasonal stress adds up over decades. We handle everything from small repairs on newer roofs to full tear-off replacements on homes that have been putting it off for too long.
- Roof repair for leaks, damaged shingles, flashing issues, and worn areas
- Roof replacement for aging or failing roof systems
- Roof inspection to assess condition and catch problems early
- Composition shingle, tile, and metal roofing options available
- Flat roof and TPO systems for commercial properties in Cotati
- Gutter installation and gutter repair to protect your roofline
Roofing Questions from Cotati Homeowners
Common questions we hear from homeowners in Cotati before they get started with a roofing project.
How do I know if my Cotati home needs a roof replacement or just a repair?
The age of the roof is usually the starting point. If your home was built in the 1960s, 70s, or 80s and has never had a new roof, it is almost certainly past due. But age alone does not tell the whole story — a roof inspection looks at the shingle condition, the decking underneath, the flashings around penetrations, and any areas where water may already be getting in. From there we can give you a straight answer on whether a targeted repair will hold or whether a full roof replacement is the smarter move.
My roof is not leaking — do I still need to have it looked at?
Yes, and this is one of the most common misconceptions we run into. A roof can be failing in several places — cracked shingles, worn flashings, lifting at the edges — and still not show an active interior leak for months or even years. By the time water shows up on your ceiling, the damage underneath is usually more extensive than it would have been if caught earlier. Getting a look before the rainy season is one of the best ways to stay ahead of a costly repair.
Do you serve areas near Cotati?
Yes. Mario Contreras Roofing is based in Santa Rosa and serves all of Sonoma County. We work regularly in Rohnert Park, Sebastopol, Petaluma, and Sonoma, as well as throughout the rest of the county. Call us at (707) 540-2592 to confirm we cover your area.
Roofing Contractor Serving Cotati and All of Sonoma County
Based in Santa Rosa, Mario Contreras Roofing serves homeowners and business owners throughout Sonoma County. Wherever you are, we bring the same honest work and dependable service.
Protect Your Home With Reliable Roofing Services