Orange County · Building on your lot

Building on your lot in Orange County

In unincorporated Orange County, the county code sets fence and wall heights by setback area and keeps home occupations inside the living area. These county rules apply only in unincorporated areas.

Ask about building on your lot in Orange County See coverage

Key points

Fence heights: Required front setback: solid fences limited to 3.5 feet, open fencing to 5 feet; setbacks not adjoining a street, 6 feet.
Accessory structures: The county has a chapter on accessory uses and structures that applies in all districts unless a plan says otherwise.
Home occupations: A home occupation must stay within the dwelling's enclosed living area, with at most 1 client at any given time.

Each rule below is marked Orange County code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.

Orange County's code applies in the unincorporated areas of the county. Cities in Orange County have their own codes and their own pages.

Fences and walls

Orange County code Required front setback: solid fences limited to 3.5 feet, open fencing to 5 feet; setbacks not adjoining a street, 6 feet.

All 9 Orange County rules on fences and walls, with the code text →

Running a business from home

Orange County code A home occupation must stay within the dwelling's enclosed living area, with at most 1 client at any given time.

All 5 Orange County rules on running a business from home, with the code text →

RV and boat parking

Orange County code What Orange County's code adds
Size limit	Vehicles over 25 feet long or over 10,000 pounds may not be parked and left on a public street. Applies: Applies to public streets and highways in a residence district. § 6-4-606 · code text No person shall park and leave standing upon any public street or highway in a "residence district" any motor vehicle of a length in excess of twenty-five (25) feet or a weight in excess of ten thousand (10,000) pounds
Parking on the street	Only to load or unload, serve a property on the block, or for emergency repairs; 72 consecutive hours maximum. Applies: Applies to vehicles over 25 feet long or 10,000 pounds on residence-district streets. § 6-4-606 · code text Prohibited vehicles may be parked on public "residence district" streets and highways while loading or unloading persons and/or property; or when such vehicle is parked in connection with or in aid of the performance of a service to or on a property in the block in which such vehicle is parked; or to perform repairs of an emergency nature on the motor vehicle itself, for a maximum of seventy-two (72) consecutive hours.

Solar panels and EV chargers

Orange County code What Orange County's code adds
Solar height and setbacks	Panels may not exceed the maximum legal building height. Applies: Required for a small residential rooftop solar system to qualify for expedited permitting. § 7-1-81 · code text A solar panel or module array that does not exceed the maximum legal building height as defined by the County of Orange.
Solar permit process	Expedited review; apply by email, the county website, or fax; electronic signatures are accepted. Applies: Applies to small residential rooftop solar systems in unincorporated areas of the county. § 7-1-81 · code text Electronic submittal of the required permit application and documents via email, the County's website, or facsimile shall be made available to all small residential rooftop solar energy system permit applicants.
Review time	The permit is issued within 3 business days. Applies: Small residential rooftop solar in unincorporated areas, when the application meets the checklist and standard plan. § 7-1-81 · code text For an application for a small residential rooftop solar energy system that meets the requirements of the approved checklist and standard plan, the Building Official shall issue a building permit or other non-discretionary permit within three (3) business days.

Swimming pools

Orange County code What Orange County's code adds
Setback from property lines	At least 3 feet. Applies: From a property line or a planned vehicle right-of-way. § 7-9-116.2 · code text Swimming pools shall not be constructed within three (3) feet of an ultimate vehicular right-of-way or property line or within those areas described by section 7-9-64 (d) and (e).

Pets, chickens and bees

Orange County code What Orange County's code adds
Large animals	Livestock need a strong fence; wire fences need 3 tight barbed wires, one at least 4 feet high. § 4-1-143 · code text Every owner, keeper, custodian or harborer of livestock shall erect and/or maintain a fence as herein described to contain and confine all livestock kept or maintained on his premises.

Grading and erosion control

Orange County code Foundation digs up to 300 cubic yards per site, with at most 4 feet of over-excavation and no drainage change. Fill under 1 foot on ground flatter than 5:1, or under 3 feet non-structural; 100 cubic yards max per lot.

All 3 Orange County rules on grading and erosion control, with the code text →

Park and impact fees for new homes

Orange County code What Orange County's code adds
How the park fee is set	Paid as the Local Park Implementation Program or another approved document requires. Applies: Unless a development agreement or an agreement with local park agencies says otherwise. § 7-9-314 · code text Local park fees shall be paid as required by the Local Park Implementation Program or other approved document, unless otherwise agreed under a Development Agreement or a specific agreement with local park agencies.

Noise and construction hours

Orange County code What Orange County's code adds
Noise limit at homes	No more than 55 dB(A). Applies: Outdoors on another residential property, 7:00 a.m. to 10:00 p.m., for more than 30 minutes in any hour; unincorporated county. § 4-6-5 · code text 1 \| 55 dB(A) \| 7:00 a.m.—10:00 p.m. No more than 50 dB(A). Applies: Outdoors on another residential property, 10:00 p.m. to 7:00 a.m., for more than 30 minutes in any hour; unincorporated county. § 4-6-5 · code text \| 50 dB(A) \| 10:00 p.m.— 7:00 a.m. No more than 45 dB(A). Applies: Inside another home, 10:00 p.m. to 7:00 a.m., for more than 5 minutes in any hour; unincorporated county. § 4-6-6 · code text \| 45 dB(A) \| 10:00 p.m.— 7:00 a.m.

Family child care homes

CA state law California law
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)

Group homes and residential care

Orange County code All garage and driveway spaces for the dwelling unit must be available for vehicle parking. Residents and the house manager may each store or park only one vehicle.

All 4 Orange County rules on group homes and residential care, with the code text →

Home alarm permits and false alarms

Orange County code What Orange County's code adds
How long an alarm may sound	At most 15 minutes Applies: When the alarm system protects a residential premises § 5-3-305 · code text All audible systems shall, after activation, limit the generation of the audible sound to a maximum of fifteen (15) minutes when the alarm system is protecting a residential premises

Other Orange County rules on this

Orange County's code also has these chapters. We have not summarized their values on this page yet; read them in the library.

Accessory uses and structures (§ 7-9-116) — applies in all districts unless a plan says otherwise
Lighting must stay on your property (§ 7-9-67)

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

How big can a shed or accessory building be in Orange County?

The county has a chapter on accessory uses and structures that applies in all districts unless a plan says otherwise. Orange County also has a related rule: Accessory uses and structures (§ 7-9-116) — applies in all districts unless a plan says otherwise.

Can I park an RV or boat at my home in Orange County?

Orange County's code: Vehicles over 25 feet long or over 10,000 pounds may not be parked and left on a public street. (Applies to public streets and highways in a residence district.) (§ 6-4-606).

Do I need a permit for solar panels or an EV charger in Orange County?

Orange County's code: Expedited review; apply by email, the county website, or fax; electronic signatures are accepted. (Applies to small residential rooftop solar systems in unincorporated areas of the county.) (§ 7-1-81); The permit is issued within 3 business days. (Small residential rooftop solar in unincorporated areas, when the application meets the checklist and standard plan.) (§ 7-1-81).

What are the pool fence and setback rules in Orange County?

Orange County's code: At least 3 feet. (From a property line or a planned vehicle right-of-way.) (§ 7-9-116.2).

What park or impact fees apply to a new home in Orange County?

Orange County's code: Paid as the Local Park Implementation Program or another approved document requires. (Unless a development agreement or an agreement with local park agencies says otherwise.) (§ 7-9-314).

What are the noise rules and construction hours in Orange County?

Orange County's code: No more than 55 dB(A). (Outdoors on another residential property, 7:00 a.m. to 10:00 p.m., for more than 30 minutes in any hour; unincorporated county.) (§ 4-6-5); No more than 50 dB(A). (Outdoors on another residential property, 10:00 p.m. to 7:00 a.m., for more than 30 minutes in any hour; unincorporated county.) (§ 4-6-5).

Can I run a family child care home in Orange County?

California law sets this for every city, including Orange County: 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 Orange County?

Orange County's code: At most 15 minutes (When the alarm system protects a residential premises) (§ 5-3-305).

General information, not legal advice.

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