Hathaway Dinwiddie Construction

Hathaway Dinwiddie Construction is a union general contractor based in San Francisco, California. As a signatory contractor with the Carpenters Union Local 22, the company employs skilled union tradespeople committed to quality and safety. With over 120 years of experience in the construction industry, Hathaway Dinwiddie has built a reputation for precision planning, adaptive processes, and proactive partnership. The company's core services include construction management, general contracting, and design-build. Hathaway Dinwiddie specializes in commercial, industrial, and institutional projects, serving clients across sectors like tech, life sciences, healthcare, and education. Their experienced team brings expertise in the latest construction technologies and methods to deliver predictable outcomes. Hathaway Dinwiddie serves clients throughout California, with headquarters in San Francisco and additional offices in Los Angeles and Sacramento. Their geographic reach allows them to support projects ranging from local renovations to major multi-state developments. The company maintains strong relationships with the Carpenters Union, IBEW, and other trades, and is committed to employing trained, certified professionals. Hathaway Dinwiddie holds numerous industry certifications, including LEED AP, DBIA, and CM-BIM, and has a stellar safety record demonstrated by OSHA SHARP status. Notable projects include the Mission Rock Building G in San Francisco, the Lumen West LA development, and the Lucas Museum of Narrative Art. With a team of over 500 employees, Hathaway Dinwiddie has the resources to handle projects of all sizes, from complex urban infill to large-scale greenfield construction. The company's commitment to innovation and client service has earned numerous industry awards over its 120+ year history. For general contracting services in the San Francisco Bay Area, Hathaway Dinwiddie delivers the certainty of a skilled union workforce, the flexibility of an adaptive process, and the value of a trusted, proactive partner.