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California Sunrooms Co. has proudly served Contra Costa County and Alameda County for over 25 years. Our reputation as the number one east bay sun room East Bay dealer for custom sunrooms, patio rooms & enclosures comes from superior design, product quality, and hassle‑free construction. Our passion for quality sun room and enclosure installation and our attention to detail has earned us top recommendations by some of the finest architects and engineers throughout the bay area. Our large volume along with timely installations allow us to offer our clients the best value in patio room, sun room, patio enclosure, and patio construction in the East Bay. We also enjoy building the best room additions onto our customers’ homes. Nothing has inspired us more than hearing our clients tell us we’ve made their patio room and sunroom dreams a reality.