San Joaquin County · Building on your lot
Building on your lot in San Joaquin County
San Joaquin County's code on this page applies only in unincorporated areas of the county. It limits accessory-building height near lot lines, sets pool setbacks, flood-zone floor heights and yard-tool hours, and lists home businesses not allowed.
Key points
- Accessory buildings: Single-story accessory buildings in a lot's rear third, within 3 feet of the rear or side line, are limited to 18 feet high.
- Home businesses: At most 1 person besides residents works on site; restaurants, medical or dental offices and towing yards are not allowed as on-site home businesses.
- Solar permits: Expedited administrative review needs only a Zoning Compliance Review; approved administratively unless specific adverse impacts are found.
- Pools: Pools and spas: at least 3 feet from side and rear lot lines. Filtration equipment: not in the front or street-side yard.
- New-home floors: Lowest floor at least 1 foot above 100-year flood elevation; Zone A/AO: 1 foot above FIRM depth, or 2 feet above ground if none.
- Yard tool hours: Powered yard tools may not run outdoors from 9:00 p.m. to 8:00 a.m. within 500 feet of a home in a Residential zone.
Each rule below is marked San Joaquin County code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
San Joaquin County's code applies in the unincorporated areas of the county. Cities in San Joaquin County have their own codes and their own pages.
Sheds, garages and other accessory structures
San Joaquin County code Single-story accessory buildings in a lot's rear third, within 3 feet of the rear or side line, are limited to 18 feet high.
Running a business from home
San Joaquin County code At most 1 person besides residents works on site; restaurants, medical or dental offices and towing yards are not allowed as on-site home businesses.
All 5 San Joaquin County rules on running a business from home, with the code text →
Solar panels and EV chargers
San Joaquin County code Expedited administrative review needs only a Zoning Compliance Review; approved administratively unless specific adverse impacts are found.
All 10 San Joaquin County rules on solar panels and EV chargers, with the code text →
Swimming pools
| Equipment and alarms |
|
|---|---|
| Setback from property lines |
|
Building in a flood zone
San Joaquin County code Lowest floor at least 1 foot above 100-year flood elevation; Zone A/AO: 1 foot above FIRM depth, or 2 feet above ground if none.
All 4 San Joaquin County rules on building in a flood zone, with the code text →
Grading and erosion control
| Grading without a permit |
|
|---|
Noise and construction hours
San Joaquin County code Powered yard tools may not run outdoors from 9:00 p.m. to 8:00 a.m. within 500 feet of a home in a Residential zone.
All 9 San Joaquin County 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 |
Affordable units in new housing (inclusionary)
San Joaquin County code Density bonus units are exempt. Replacing an existing residential structure is exempt, up to the total livable area of the prior structure.
Group homes and residential care
| Homes for 6 or fewer |
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|---|---|
| Distance between homes |
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Parking spaces required for homes
| Guest parking |
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|---|---|
| Spaces per apartment or condo |
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| Spaces for a single-family home |
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Home alarm permits and false alarms
| How long an alarm may sound |
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|---|---|
| False alarm fees |
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Signs on homes
| Signs that need no permit |
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|---|---|
| For-sale and open-house signs |
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| Other temporary signs |
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Trash and recycling carts
San Joaquin County code Green waste must go in the green waste container, not a garbage or recyclables container Separate containers for refuse, recyclables and green waste
All 5 San Joaquin County rules on trash and recycling carts, with the code text →
Historic homes
San Joaquin County code A demolition permit is required for any building, structure or object more than 45 years old Discretionary decision subject to review under CEQA
All 6 San Joaquin County rules on historic homes, with the code text →
Other San Joaquin County rules on this
San Joaquin County's code also has these chapters. We have not summarized their values on this page yet; read them in the library.
- Keeping animals at home (§ 9-409.070)
- Two homes on one lot (SB 9) (§ 9-200.040)
- Urban lot splits (SB 9) (§ 9-501.040)
- Outdoor lighting (Ch. 9-403)
- Development impact fees (Ch. 9-610)
Who this affects
Frequently asked questions
What are the pool fence and setback rules in San Joaquin County?
Pools and spas: at least 3 feet from side and rear lot lines. Filtration equipment: not in the front or street-side yard.
What are the grading rules in San Joaquin County?
San Joaquin County's code: Excavations for basements and footings, and fill using only that material, with a valid building permit; excavations and fills for wells or septic systems with a well or septic permit; a minor cut of 50 cubic yards or less no greater than three feet deep; a minor fill of 50 cubic yards or less outside a flood hazard area that does not alter a watercourse or wetland, no greater than one foot deep on a natural slope of 15 percent or less if it supports structures, or no greater than three feet deep if it does not (Exempt work must still meet the grading standards of Chapter 9-704) (§ 9-812.020).
Can I run a family child care home in San Joaquin County?
California law sets this for every city, including San Joaquin 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)).
Where are group homes and residential care homes allowed in San Joaquin County?
San Joaquin County's code: Treated as residential use, subject only to the same requirements as any permitted residential use of the same housing type. (Residential care facilities for 6 or fewer residents.) (§ 9-409.390); At least 300 feet from any other residential care facility. (Applies to residential care facilities serving 7 or more persons, under state law.) (§ 9-409.390).
How many parking spaces does a home need in San Joaquin County?
San Joaquin County's code: 0.2 spaces per dwelling unit (Multi-unit developments with 5 or more dwelling units) (§ 9-406.040); 1 space per dwelling unit (Multi-unit dwellings, 1 bedroom) (§ 9-406.040).
Do I need a permit for a home alarm in San Joaquin County?
San Joaquin County's code: An audible alarm must stop and reset within 30 minutes of being activated (§ 4-6207); The Sheriff's Department may charge a service fee for each false alarm; not paying it is a violation (§ 4-6208).
What signs may I put up at my home in San Joaquin County?
San Joaquin County's code: Garage and yard sale signs are exempt from the sign chapter (§ 9-408.050); Up to 8 square feet, 8 feet high; up to 2 signs; until the property is sold; private property only (Residential real estate signs) (§ 9-408.110).
General information, not legal advice.
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