Setback Rules: Fairfield vs Vacaville

Can I build a shed in my Fairfield side yard?

Accessory structures under 120 square feet and 12 feet tall generally don't require a building permit but must still comply with zoning setbacks—typically at least 3 feet from side and rear property lines for small detached structures. Larger sheds require permits and full setback compliance per Section 25.20.

Are ADU setbacks really only 4 feet in Fairfield?

Yes. California Government Code 65852.2 preempts local standards for new detached ADUs, mandating no more than 4-foot side and rear setbacks. Fairfield's zoning ordinance and ADU standards conform. Front setbacks for ADUs typically still follow the underlying zone.

What's the setback for a new house in Vacaville?

It depends on the zoning district (RE / RR / RL / RM / RH). Vacaville Municipal Code Chapter 14.09.060 sets specific front-, side-, and rear-yard minimums in each district's table. As examples, a front-entry garage may use a 25% reduction with a minimum 18 feet, and a two-story RL home on a 6,000+ sq ft lot needs side setbacks of 10 ft and 5 ft. Check Table 14.09.060 for your specific district.

Can I add a room into my rear yard setback in Vacaville?

Not without a variance or approved minor exception. The required rear-yard setback in most Vacaville residential districts is at least 10 feet, and the average rear-yard setback must equal or exceed the district minimum. Eaves and certain projections may extend into setbacks per VMC Table 14.09.200.A, but enclosed living area generally may not.

Do ADUs need to meet the same setbacks as the main house?

No. Under California state ADU law (Government Code §65852.2) and Vacaville's adopted ADU ordinance, detached ADUs may be built with side and rear setbacks of 4 feet. Front-yard setbacks for ADUs still follow the underlying zoning. Junior ADUs within an existing single-family home have no additional setback if no exterior expansion is needed.