Alameda, CA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Front yard
- 20 feet minimum
- Interior side yard
- 5 feet minimum
- Street side yard, corner lot
- 10 feet minimum
- Rear yard
- 20 feet minimum
- Governing section
- AMC Sec. 30-4.1(d)(7)-(10)
- Encroaching without variance
- Misdemeanor, up to $1,000 fine
Summary
Alameda's R-1 Residential District requires a 20-foot front yard, a 5-foot interior side yard, a 10-foot street-side yard on corner lots, and a 20-foot rear yard. Section 30-4.1(d)(7) through (10) sets these minimum setbacks, which apply to every one-family and two-family lot in the district alongside the 48 percent coverage and 30-foot height limits.
7.Minimum Front Yard: Twenty (20′) feet.8.Minimum Side Yard: Five (5′) feet.9.Minimum Street Side Yard. The side yard on the street side of a corner lot shall not be less than ten (10′) feet.10.Minimum Rear Yard: Twenty (20′) feet.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 74).
Full Breakdown
1(d) lists Alameda's R-1 setback minimums as four separate numbered standards. Item 7 sets a 20-foot minimum front yard. Item 8 sets a 5-foot minimum interior side yard. Item 9 addresses corner lots specifically: the side yard on the street side of a corner lot shall not be less than ten feet, a wider setback than the interior 5-foot standard because it faces a second street. Item 10 sets a 20-foot minimum rear yard, matching the front yard depth. A further rule in item 11 protects a key lot, a lot whose side line backs up to a corner lot's rear line: within 20 feet of the key lot's side property line, the corner lot's street-side setback must equal the key lot's own front-yard setback, and no structure besides a fence or wall can stand within 5 feet of the corner lot's rear property line.
Building separation between two structures on the same lot is not fixed by a specific footage in this section; it instead defers to whatever the California Building Code requires under item 12. 7, so long as at least a 4-foot interior side and 4-foot rear setback are kept.
Violations & Fines
Constructing or extending a structure that encroaches into the required front, side, street-side, or rear setback without an approved variance is an unlawful use under Section 30-24.2, and the City Attorney can seek abatement or an injunction as a public nuisance. A setback violation is a misdemeanor under Section 30-24.3, exposing the property owner to a fine of up to $1,000 or six months in jail under Section 1-5.1(b), and the Building Official can deny a certificate of occupancy under Section 30-23.1 until the encroachment is corrected.
Frequently Asked Questions
How far back from the street must a house sit in Alameda's R-1 district?
Are side yard setbacks different on a corner lot in Alameda?
Can I build closer to my property line under a state housing law exception?
Sources & Official References
Other rules in Alameda
California rules heatmap·Compare Alameda to another location·View the California building setbacks & zoning overview
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Setback Rules in Nearby Cities
How other cities in Alameda County handle setback rules.