Colusa County · Land use · Single-family home
Where is a single-family home allowed in Colusa County?
In Colusa County, a single-family home is allowed in 13 base zones (F-A, E-A, U-C, U-T, A-T and 8 more, 2 with a condition), needs an use permit in 1 (C-R) and not allowed in 12 (Colusa County use tables, read October 2026).
Key points
- Allowed: F-A, E-A, U-C, U-T, A-T, R-R, R-1, R-2 and 5 more
- Needs a permit: C-R
- Not allowed: C-1, C-2, C-H, M-1, M-2, RD, R-F, F-M and 4 more
Find your lot's zone on the city zoning map, then read its row. Every status below was read from the Colusa County Municipal Code use tables (read October 2026). Base zones only. General information, not legal advice — check with the city before you apply.
Zones where a single-family home can go
Colusa County's code calls this use “Single-Family Home”. Each row links to the use table it comes from. A zone marked “see note” has a condition in the code, for example upper floors only or a larger lot.
| Zone | Status | Code |
|---|---|---|
| F-A Foothill Agriculture | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| E-A Exclusive Agriculture | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| U-C Upland Conservation | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| U-T Upland Transition | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| A-T Agricultural Transition | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-R Rural Residential | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-1 Residential Single-Family | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-2 Residential Two-Family | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-3 Residential Multiple Family | Allowed — see note Note 1: A single-family home in the R-3 and R-4 zones is only permitted if the single-family home is: (1) replacing an existing single-family unit on a one-for-one basis, (2) on an existing lot of eight thousand square feet or less, or (3) is part of a housing development with the majority of units affordable to extremely low, very low, and/or low-income households. | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-4 Apartment-Professional | Allowed — see note Note 1: A single-family home in the R-3 and R-4 zones is only permitted if the single-family home is: (1) replacing an existing single-family unit on a one-for-one basis, (2) on an existing lot of eight thousand square feet or less, or (3) is part of a housing development with the majority of units affordable to extremely low, very low, and/or low-income households. | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| MU Mixed Use | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| F-R Forest Residential | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| R-S Rural Services | Allowed | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
| C-R Commercial Resort | Needs an use permit | Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS |
Zones where it is not allowed
What else applies
- State law: State law lets most single-family lots add an ADU and a JADU (California ADU law) and a second home or a lot split under SB 9 (Gov. Code § 65852.21).
- Not covered here: FMR (Forest Management and Recreation): its column in Table 44-2.60-2 is empty for every row, so no cell is given; PD and EP are overlay zones. Overlay zones and specific plans can also change the answer.
Other uses in Colusa County
Who this affects
Frequently asked questions
Can I have a single-family home in the C-R zone in Colusa County?
Only with an use permit. Colusa County's use table lists it that way in C-R (Commercial Resort) (Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS).
Can I have a single-family home in the C-1 zone in Colusa County?
No. Colusa County's use table does not allow it in C-1 (Neighborhood Commercial) (Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS).
Can I have a single-family home in the F-A zone in Colusa County?
Yes. Colusa County's use table lists it as allowed in F-A (Foothill Agriculture) (Article 44-2 — ZONING CLASSIFICATIONS, ALLOWED USES, AND DEVELOPMENT STANDARDS).
General information, not legal advice.
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