Suisun City · Building on your lot
Building on your lot in Suisun City
Suisun City sets its own limits on fences and home businesses. Fence height depends on the zone, the yard and how open the fence is.
Key points
- Fence height: In RL and RM zones, front-yard fences are limited to 3 feet if solid or 4 feet if at least 50% open.
- Home businesses: Suisun City requires a business license for a home business; the planning commission may allow one non-resident employee.
Each rule below is marked Suisun City code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.
Fences and walls
Suisun City code In RL and RM zones, front-yard fences are limited to 3 feet if solid or 4 feet if at least 50% open.
All 9 Suisun City rules on fences and walls, with the code text →
Running a business from home
Suisun City code Suisun City requires a business license for a home business; the planning commission may allow one non-resident employee.
All 5 Suisun City rules on running a business from home, with the code text →
Pets, chickens and bees
| Permit |
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|---|
Building in a flood zone
| Floodplain permit |
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|---|---|
| Height of the lowest floor |
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Grading and erosion control
| Steepest cut or fill slope |
|
|---|---|
| Grading without a permit |
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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
Suisun City code At least 9 feet wide and 19 feet deep of unobstructed area. Required covered spaces must remain available to residents. They may not be subleased or subrented.
All 8 Suisun City rules on parking spaces required for homes, with the code text →
Home alarm permits and false alarms
| False alarm fees |
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|---|---|
| Alarm permit |
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| When a permit can be revoked |
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Signs on homes
Suisun City code Street address signs on structures and building identification signs are exempt. Signs warning against trespass, up to 2 square feet per sign, are exempt.
All 6 Suisun City rules on signs on homes, with the code text →
Other Suisun City rules on this
Suisun City's code also has these chapters. We have not summarized their values on this page yet; read them in the library.
- SB 9 urban lot splits (§ 18.08.090)
- Permit process for home solar (§ 15.04.390)
- Design standards for solar installations (Ch. 18.60)
- Draining a pool into the sewer (§ 13.08.090)
- Noise limit for small wind turbines (§ 18.62.070)
- Noise regulations (§ 8.12.108)
Who this affects
Frequently asked questions
What are the rules for building in a Suisun City flood zone?
Suisun City's code: A development permit is needed before construction or development begins in any special flood hazard area. (§ 15.08.370); The lowest floor, including basement, must be at or above the base flood elevation plus ½ foot of freeboard. (New or substantially improved homes in an A zone and all other zones except AO. The floodplain administrator may waive the freeboard on written appeal.) (§ 15.08.430).
What are the grading rules in Suisun City?
Suisun City's code: Home gardening or fill up to 50 cubic yards, under 5,000 square feet; wells and utility trenches. (Gardening under 2 feet; fill under 3 feet on 5:1 or flatter, no structures. Must not endanger neighbors, increase erosion or runoff, or alter drainage.) (§ 15.12.060); Cut and fill slopes may be no steeper than 2 horizontal to 1 vertical. (Steeper only if a geological and engineering analysis shows it is safe and erosion control is specified.) (§ 15.12.180).
Can I run a family child care home in Suisun City?
California law sets this for every city, including Suisun City: 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 Suisun City?
Suisun City's code: The fee is in the city's master fee schedule. (Each public safety response to a false alarm.) (§ 9.24.090); A permit is required for each alarm system. (§ 9.24.120).
General information, not legal advice.
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