El Cajon · Building on your lot
Building on your lot in El Cajon
El Cajon sets its own limits on fences, accessory structures and home businesses. Fence height depends on the yard and clear sight lines, and accessory setbacks depend on structure height.
Key points
- Fence height: El Cajon limits fences to 42 inches in the required front yard and 6 feet behind it; reverse corner lots have extra limits.
- Accessory structures: El Cajon limits accessory structures to 20 feet and no larger than the home; footprints over 1,200 square feet need a minor use permit.
- Home businesses: El Cajon allows no customers at a home business, except one student or family per session for indoor lessons, and resident employees only.
Each rule below is marked El Cajon code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
Fences and walls
El Cajon code El Cajon limits fences to 42 inches in the required front yard and 6 feet behind it; reverse corner lots have extra limits.
All 7 El Cajon rules on fences and walls, with the code text →
Sheds, garages and other accessory structures
El Cajon code El Cajon limits accessory structures to 20 feet and no larger than the home; footprints over 1,200 square feet need a minor use permit.
All 7 El Cajon rules on sheds, garages and other accessory structures, with the code text →
Running a business from home
El Cajon code El Cajon allows no customers at a home business, except one student or family per session for indoor lessons, and resident employees only.
All 5 El Cajon rules on running a business from home, with the code text →
Solar panels and EV chargers
El Cajon code You may submit the application and documents electronically; electronic signatures are accepted. A building permit is issued promptly after a complete application meets the approved checklist and standard plan.
All 4 El Cajon rules on solar panels and EV chargers, with the code text →
Swimming pools
| Maintenance and empty pools |
|
|---|---|
| Setback from property lines |
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Pets, chickens and bees
El Cajon code Up to 4 beehives per property, and not within the zone's required setbacks. Yes: 1 bird per 100 square feet of unpaved rear yard, up to 10; no roosters.
All 4 El Cajon rules on pets, chickens and bees, with the code text →
Grading and erosion control
| Grading without a permit |
|
|---|
Building on a hillside
El Cajon code A detailed geotechnical report by a certified engineering geologist or licensed geotechnical engineer is required. No steeper than 2:1, which is 2 horizontal to 1 vertical.
All 8 El Cajon rules on building on a hillside, with the code text →
Garage and yard sales
| How long a sale may last |
|
|---|---|
| Sales per year |
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Family child care homes
| Zoning | A small or large family child care home is a residential use and a use by right under all local ordinances, including zoning |
|---|---|
| Business license or fee | A city or county may not charge a business license, fee or tax to run a family child care home |
| Local rules | Local limits on height, setbacks, lot size, health and safety must be the same as for every other home in the same zone |
| Small home | Up to eight children, counting the provider's own children under 10 who live there |
| Large home | 7 to 14 children, counting the provider's own children under 10 who live there |
Parking spaces required for homes
El Cajon code 1 additional paved parking space. 2 spaces in an enclosed garage, with unobstructed interior size of at least 20 ft by 20 ft.
All 9 El Cajon rules on parking spaces required for homes, with the code text →
Home alarm permits and false alarms
| Alarm permit |
|
|---|
Signs on homes
| For-sale and open-house signs |
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|---|
Trash and recycling carts
El Cajon code Organic waste generators must source-separate organic waste and subscribe to service or self-haul it. Recyclables are separated from garbage and organic waste and put in receptacles provided by the contractor.
All 4 El Cajon rules on trash and recycling carts, with the code text →
Historic homes
El Cajon code 75 years. A certificate of modification is required.
All 11 El Cajon rules on historic homes, with the code text →
Other El Cajon rules on this
El Cajon's code also has these chapters. We have not summarized their values on this page yet; read them in the library.
- Urban lot splits and second homes (SB 9) (§ 17.140.065) — single-family zones only
- Parking RVs and trailers on the street (§ 10.28.070) — public streets only
- Living in a trailer or RV while you build (§ 17.225.170) — during construction of a home only
- Flood damage prevention (Ch. 15.14)
- Loud and disturbing noise (Ch. 9.44)
- Regional transportation mitigation fee (Ch. 15.13)
Who this affects
Frequently asked questions
What are the pool fence and setback rules in El Cajon?
El Cajon's code: At least 3 feet from rear or interior side lot lines; not allowed in required front or exterior side yard. (Applies to swimming pools, spas, hot tubs and their equipment.) (§ 17.130.230).
What are the grading rules in El Cajon?
El Cajon's code: Cuts under 2 feet deep or fills under 12 inches deep, each 50 cubic yards or less per lot. (No slope steeper than 2:1 and no change to a drainage course; no engineered grading and drainage plan is needed.) (§ 15.64.020).
What are the garage sale rules in El Cajon?
El Cajon's code: At most 6 sales per calendar year. (Per residentially developed property, including multi-family developments.) (§ 17.225.040); No more than 1 calendar day per sale. (§ 17.225.040).
Can I run a family child care home in El Cajon?
California law sets this for every city, including El Cajon: Zoning: A small or large family child care home is a residential use and a use by right under all local ordinances, including zoning (Health & Safety Code § 1597.45(a)); Business license or fee: A city or county may not charge a business license, fee or tax to run a family child care home (Health & Safety Code § 1597.45(b)); Local rules: Local limits on height, setbacks, lot size, health and safety must be the same as for every other home in the same zone (Health & Safety Code § 1597.45(e)); Small home: Up to eight children, counting the provider's own children under 10 who live there (Health & Safety Code § 1596.78(c)); Large home: 7 to 14 children, counting the provider's own children under 10 who live there (Health & Safety Code § 1596.78(b)).
Do I need a permit for a home alarm in El Cajon?
El Cajon's code: An alarm user may not have or maintain an alarm system without a city permit. (§ 5.84.050); The permit tax is set by city council resolution. The city manager or designee issues the permit. (On receipt of the permit application and the appropriate tax.) (§ 5.84.065).
What signs may I put up at my home in El Cajon?
El Cajon's code: 1 unlighted sale or lease sign, up to 12 square feet, for the particular property. (Applies in planned residential developments (PRD).) (§ 17.190.260).
General information, not legal advice.
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