RSA+

Established in 1980, RSA⁺ is a California S-Corporation located in Downtown Lakeport and Downtown Napa Valley. As a full-service consulting firm, RSA⁺ specializes in civil engineering, surveying, landscape architecture, joint trench design, and construction inspection services. With nearly 40 employees, the firm is structured to include one complete survey team and three complete engineering teams, enabling RSA⁺ to effectively manage projects of any size.

With expertise in residential, commercial, winery, and public works projects, we deliver innovative solutions while navigating complex regulations efficiently. Our commitment to quality and collaboration ensures successful project outcomes.

We provide a range of services, including civil engineering, land planning, surveying, vineyard and winery engineering, water resources management, stormwater solutions, underground utilities, and joint trench coordination. Our expertise allows us to streamline project approvals, minimize delays, and deliver high-quality results tailored to each client’s needs. Trusted for over four decades, we continue to shape the region with precision and excellence.