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.

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.

Start with what your roof needs

A property’s address or age alone does not tell us whether it needs a repair or a new roof. Tell us about leaks, earlier work, and the material if you know it. We assess the condition and explain the proposed work so you can make a decision with useful information.

• Leak diagnosis and repair for new or returning water entry.
• Roof replacement when a wider project makes sense.
• Roof inspections to understand the condition before deciding.
• Commercial roofing with access and building use in mind.
• Gutters and skylights connected to the roof system.

Planning a roofing visit in Cotati

Share the project address, your contact details, and any access concerns when you request an estimate. If the property is occupied by tenants or a business, let us know who can provide access and which hours work best. We can discuss your project in English or Spanish.

Our hours are Monday–Friday, 7am–5pm, and Saturday, 8am–2pm. Sunday is closed. For an active leak, call (707) 540-2592 during business hours to discuss current availability.

We also work in neighboring communities. Explore all Sonoma County service areas.