Rancho Santa Margarita · Building on your lot
Building on your lot in Rancho Santa Margarita
Rancho Santa Margarita sets its own rules for fences, accessory structures and home businesses on residential lots. Fence height depends on the yard and the lot, and fences need a building permit.
Key points
- Fence height: Fences: at most 3.5 feet, or 5 feet in front yards with director approval and open bars; rear and non-corner side yards, 6 feet.
- Accessory height: Detached accessory structures may be no taller than the main building; fireplaces, barbecues and fire pits are limited to 8 feet unless approved otherwise.
- Home businesses: A home business may use at most 2 rooms or 20% of the home, whichever is less, with at most 1 non-resident employee.
Each rule below is marked Rancho Santa Margarita code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
Fences and walls
Rancho Santa Margarita code Fences: at most 3.5 feet, or 5 feet in front yards with director approval and open bars; rear and non-corner side yards, 6 feet.
All 8 Rancho Santa Margarita rules on fences and walls, with the code text →
Sheds, garages and other accessory structures
Rancho Santa Margarita code Detached accessory structures may be no taller than the main building; fireplaces, barbecues and fire pits are limited to 8 feet unless approved otherwise.
Running a business from home
Rancho Santa Margarita code A home business may use at most 2 rooms or 20% of the home, whichever is less, with at most 1 non-resident employee.
All 7 Rancho Santa Margarita rules on running a business from home, with the code text →
RV and boat parking
Rancho Santa Margarita code Vehicles over 25 feet long or over 10,000 pounds may not park on any public street. Up to 12 hours in a row.
All 3 Rancho Santa Margarita rules on RV and boat parking, with the code text →
Solar panels and EV chargers
Rancho Santa Margarita code Administrative, nondiscretionary approval with all needed permits when the application meets the City checklist. Administrative, nondiscretionary review; permit issues when the application meets checklist and standard plan; 1 inspection, scheduled within 2 business days.
All 3 Rancho Santa Margarita rules on solar panels and EV chargers, with the code text →
Swimming pools
| Pool barrier |
|
|---|---|
| Equipment and alarms |
|
| Setback from property lines |
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Pets, chickens and bees
Rancho Santa Margarita code Livestock must be kept in by a good, strong fence that meets zoning rules. An additional animal license is required for 5 or more dogs.
All 3 Rancho Santa Margarita rules on pets, chickens and bees, with the code text →
Building in a flood zone
| Floodplain permit |
|
|---|---|
| Height of the lowest floor |
|
Grading and erosion control
Rancho Santa Margarita code Exempt, up to 50 cubic yards: digs under 2 feet; fills under 1 foot on ground flatter than 5:1. Exempt: digging for basements and footings of a structure with a valid building permit.
All 3 Rancho Santa Margarita rules on grading and erosion control, with the code text →
Noise and construction hours
Rancho Santa Margarita code Noise may not exceed 55 dB(A). Noise may not exceed 50 dB(A).
All 5 Rancho Santa Margarita rules on noise and construction hours, with the code text →
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
Rancho Santa Margarita code At least 10 feet wide and 20 feet long of unobstructed area. 9 feet wide and 18 feet long of unobstructed area.
All 17 Rancho Santa Margarita rules on parking spaces required for homes, with the code text →
Signs on homes
| Signs that need no permit |
|
|---|---|
| For-sale and open-house signs |
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Trash and recycling carts
| Where carts are kept |
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|---|
Who this affects
Frequently asked questions
What are the pool fence and setback rules in Rancho Santa Margarita?
Rancho Santa Margarita's code: Pools, whirlpools and spas must be fenced as the adopted building code requires. (§ 9.04.120); At least 3 feet from any side or rear property line. (Measured from the edge of the water.) (§ 9.04.120).
What are the rules for building in a Rancho Santa Margarita flood zone?
Rancho Santa Margarita's code: You need a floodplain development permit before any construction or development, including manufactured homes, in a special flood hazard area. (§ 9.12.130); The lowest floor must be at or above the base flood elevation. (New or substantially improved homes in AE, AH or A1-30 Zones.) (§ 9.12.150).
Can I run a family child care home in Rancho Santa Margarita?
California law sets this for every city, including Rancho Santa Margarita: 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)).
What signs may I put up at my home in Rancho Santa Margarita?
Rancho Santa Margarita's code: Trespassing and property alarm signs under 2 square feet are exempt. (§ 9.07.060); One temporary residential open house sign, up to 3 square feet. (On the premises for sale, lease or rent, and posted only when a salesperson is present.) (§ 9.07.060).
When can trash carts go out to the curb in Rancho Santa Margarita?
Rancho Santa Margarita's code: Shield solid waste containers from view within a building or a wall-enclosed area at least 6 feet high. (Residential and commercial customers.) (§ 5.06.460).
General information, not legal advice.
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