El Cajon, CA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Governing section
- El Cajon Municipal Code § 17.140.090
- RS-40 front yard
- 30 feet
- RS-6 front yard
- 20 feet
- RM-2200 interior side yard
- 5 feet
- Enforcing department
- Community Development Department
- Max misdemeanor penalty
- $1,000 fine, up to 6 months jail
Summary
El Cajon's residential setback table under Municipal Code § 17.140.090 sets minimum yards for primary structures by zone, from a 30-foot front yard in the low-density RS-40 zone down to 10 feet in the multifamily RM-2200 zone. Interior side yards run 5 to 15 feet and rear yards 10 to 25 feet.
§ 17.140.090. Setbacks. The following table lists the minimum setbacks for primary structures in residential zones. The areas subject to building setback restrictions are referred to as "yards." ... Table 17.140.090 Setbacks Residential Zone: Front Yard Setback: Cul-de-sac Front Yard Setback: Exterior Side Yard Setback: Interior Side Yard Setback: Rear Yard Setback: ... RS-40 30 ft.1 20 ft.2 15 ft.3 15 ft. 25 ft.5 ... RS-6 20 ft.1 10 ft.2, 3 10 ft.3 5 ft.—10 ft.4 15 ft.5&6
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4940073; v10 updated 2026-06-09).
Full Breakdown
090 sets the minimum yard setbacks for primary residential structures, and the numbers shrink as density rises. In the large-lot RS-40 zone the front yard is 30 feet, the exterior side yard 15 feet, the interior side yard 15 feet, and the rear yard 25 feet. RS-20 and RS-14 lots carry a 20-foot front yard, a 12-foot exterior side yard, and a 6-to-12-foot interior side yard that widens on wider lots per footnote 4. RS-9 and RS-6, El Cajon's smallest single-family lots, drop to a 20-foot front yard, 10-foot exterior side yard, and a rear yard of 15 to 25 feet depending on zone.
Multifamily zones tighten further: RM-6000 carries a 20-foot front yard and 10-foot rear yard, while the highest-density RM-2200 zone allows a 10-foot front yard with only a 5-foot interior side yard. RM-HR is governed instead by Specific Plan No. 165 rather than this table. Footnote 1 lets side-entry garages sit 20 feet from the front line in RS-40 and 15 feet in RS-20 through RS-6, while footnote 3 requires direct-entry garages and carports to keep a full 20-foot setback regardless of the base front yard.
Cul-de-sac lots measure their front yard on an arc parallel to the front property line under footnote 2. 020 makes clear these standards apply to all new construction; a lawful nonconforming structure built before its zone's current setback took effect is not forced to conform unless it is altered. 120.
Violations & Fines
Building or expanding a structure inside a required setback without an approved permit is a code violation. Under § 1.24.010, violating any Municipal Code provision is a misdemeanor punishable by up to a $1,000 fine and six months in county jail, though the city attorney may instead charge it as an infraction with fines of $100 for a first offense, $200 for a second, and $500 for each further violation within a year. Each day the encroaching structure remains is a separate offense.
Frequently Asked Questions
What is the minimum front yard setback in El Cajon?
Do setback rules apply to a house built before the current standards?
What is the smallest interior side yard allowed in El Cajon?
Sources & Official References
Other rules in El Cajon
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