Dublin, CA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- R-1 front setback
- 20 ft. avg., 18 ft. to garage
- R-1/R-2/R-M side setback
- 5-10 feet, formula varies by lot
- R-2/R-M rear setback
- 20-30 feet
- Agricultural district setbacks
- 50 ft. front/street-side/rear, 30 ft. side
- Allowed encroachment
- Up to 5 ft. for eaves, equipment
- Governing section
- Dublin Municipal Code Sec. 8.36.020
Summary
Dublin Municipal Code Section 8.36.020 sets minimum front, side, street-side and rear yard setbacks by zoning district: a 20-foot average front setback (18 feet minimum to garage) in R-1, 10-foot side and street-side yards across R-1/R-2/R-M, 20 to 30-foot rear yards, and much wider 30 to 50-foot setbacks in the Agricultural district.
A. Development regulations are minimums unless stated as maximums. All areas are given in net square feet... (1) Living spaces may encroach to 15 ft. from Front Lot Line with Site Development Review on lots up to 6,000 square feet in size. (2) Side Yard setbacks in the R-1 zoning district shall be a minimum of 5 feet plus one foot for each full 10 feet by which lot width exceeds minimum lot width up to a maximum of 10 feet. (3) Buildings with 4 or more residences in the R-M zoning district shall have a 15 foot Side Yard on one side.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2-26, passed March 3, 2026).
Full Breakdown
020's Development Regulations table applies minimum setbacks by district (all figures are minimums unless the code says maximum). In the R-1 single-family district, the front setback is a 20-foot average with an 18-foot minimum to an attached garage under footnote (1), which also lets living space encroach to 15 feet from the front lot line with Site Development Review on lots up to 6,000 square feet. R-1 side yards run a minimum of 5 feet plus one foot for every full 10 feet the lot width exceeds the minimum, capped at 10 feet, per footnote (2); street-side yards are 10 feet and rear yards are 20 feet.
The R-2 duplex district uses the same 20-foot average front setback, flat 10-foot side and street-side yards, and a 20-foot rear yard. The R-M multifamily district requires a 20-foot front yard, 10-foot side yard (15 feet on one side for buildings with 4 or more units, footnote (3)), 10-foot street-side yard and a deeper 30-foot rear yard. The Agricultural (A) district carries the widest setbacks in the city: 50 feet front, 30 feet side, 50 feet street-side and 50 feet rear. 5 feet into a side setback, subject to Uniform Building Code Sections 504 and 1710. 070 separately governs setbacks between buildings on the same lot, requiring at least 20 feet between rows of multifamily buildings in the R-M district.
Violations & Fines
Building closer to a lot line than Section 8.36.020 allows without an approved exception, encroachment permit or Site Development Review is a public nuisance under Dublin Municipal Code Section 8.144.050 and subject to summary abatement. Enforcement runs through the Department of Community Development; a first infraction is fined up to $100, a second up to $200, and a third within a year up to $500, with a fourth violation chargeable as a misdemeanor under Section 8.144.070, and any building permit issued for a nonconforming setback is void under Section 8.144.050.D.
Frequently Asked Questions
How far back from the street must a house sit in Dublin's R-1 zone?
Can air conditioning units sit inside the required side setback?
Are setbacks bigger for agriculturally zoned land in Dublin?
Sources & Official References
Other rules in Dublin
California rules heatmap·Compare Dublin to another location·View the California building setbacks & zoning overview
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