Vacaville, CA Building Setbacks & Zoning: Setback Rules (2026)

Vacaville's residential zoning districts are established in VMC Chapter 14.09.060. Setback minimums are set district-by-district and summarized in Table 14.09.060 (and accessory-structure Table 14.09.060.D for RR and RE districts). Examples drawn from the code: (1) Front-entry garage setbacks may be reduced up to 25 percent with a minimum 18 feet — and for structures above the first floor in single-family residential districts there are second-story setback rules. (2) In the RL district on lots 6,000 sq ft or larger developed with two or more stories, one interior side setback must be a minimum of 10 feet and the other interior side a minimum of 5 feet. (3) Average rear-yard setback must equal or exceed the required rear setback, but may be no closer than 10 feet from the rear property line in most residential districts. (4) Building projections (eaves, bay windows, etc.) may extend into required setbacks per Table 14.09.200.A (Allowed Projections Into Required Setbacks). (5) For parcels adjacent to designated open-space lands where wildfire is a threat, VMC Chapter 14.20.290 imposes a minimum 30-foot rear-yard setback and a 10-foot side-yard setback in addition to the underlying zoning. Accessory dwelling units follow state ADU law (Gov't Code §65852.2) and the City's adopted ADU ordinance, which sets minimum 4-foot side/rear setbacks for detached ADUs.