O.S. Builders

O.S. Builders is a Bay Area general contractor specializing in residential remodeling—kitchens, bathrooms, additions, and full-home renovations. With over 20 years of hands-on experience, we bring old-school craftsmanship, clean job sites, and clear communication to every project. From Orinda to Santa Cruz and throughout Marin County, our team works closely with homeowners to turn vision into reality—with no shortcuts and no surprises. Whether you're remodeling a single room or transforming your whole home, O.S. Builders delivers work that lasts and service you can trust from the first handshake to the final walkthrough.