Dublin, CA Accessory Structures: Carport Rules (2026)

Dublin does not maintain a separate carport chapter; carports are regulated as accessory structures under Chapter 8.40 and the Building Code. The City's Building & Safety handout requires a building permit for any structure attached to the main dwelling regardless of size, which covers attached carports, and for any detached structure greater than 120 square feet of floor area. The handout specifically notes that patio covers may not be used as carports, garages, storage rooms, or habitable rooms, so a true carport is a distinct structure subject to full structural review rather than the lighter patio-cover provisions. For zoning, Section 8.40.020 sets a 15-foot maximum height for detached accessory structures unless otherwise specified, prohibits accessory structures in the front yard (except an approved entry feature), and caps coverage of the required rear yard by all accessory structures at 30%. Setbacks to property lines, allowable lot coverage, and placement are determined by the property's zoning district, which the Planning Division can confirm at (925) 833-6610. Importantly, a carport (like a garage or covered parking structure) can be converted into an accessory dwelling unit without providing replacement off-street parking, per Section 8.80.040, reflecting California ADU law. Because carports involve structural framing and footings, plans drawn to scale showing setbacks to all property lines are part of the submittal.