Colusa County Unincorporated, California Zoning Map
Zoning, overlays and hazards on every parcel — and an answer to what the code actually lets you build. Compiled from current zoning data for all 31 districts.
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What's in the Colusa County Unincorporated dataset
Every field below is available for any Colusa County Unincorporated parcel, on the map and through the AI.
Zoning
- District code & full name
- Parcel boundary & APN
- All 31 districts mapped
Building controls
- Maximum building height
- Floor area ratio (FAR)
- Front setback
- Side setback
Overlays, hazards & AI
- Flood hazard & environmental layers
- Ask the AI about any parcel
- Powered by live parcel data
Where uses are permitted in Colusa County Unincorporated
Share of Colusa County Unincorporated's zoned land where each use is permitted.
- Single-family
- 77.88%
- Multi-family
- 0.02%
- ADU
- 77.85%
- Two-family
- 0.02%
- Retail
- 79.60%
- Eating & drinking
- 77.64%
- Office
- 1.16%
- Hotel / motel
- 0.32%
- Industrial
- 77.47%
- Storage & warehouses
- 76.94%
Colusa County Unincorporated, California Zoning Districts: What Do They Mean?
Zoning districts are areas regulated by specific laws that determine land use, building types, and development rules. Each district below shows its zone type and which uses it permits.
| Zone Code | Category | Area | Details |
|---|---|---|---|
AT-10 Agricultural Transition | - | 1,269.1 ac | Standards & uses → |
AT-20 Agricultural Transition | - | 1,929.9 ac | Standards & uses → |
A-V Airport | - | 17.3 ac | Standards & uses → |
C-2 Community Commercial | - | 124 ac | Standards & uses → |
Showing 4 of 31 districts
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Each one runs against the live Colusa County Unincorporated dataset and returns the districts, standards and approvals involved.
What should developers know about Colusa County Unincorporated zoning?
Unincorporated Colusa County is a vast Sacramento Valley jurisdiction where zoning is overwhelmingly about protecting agriculture and natural resources, not enabling urban development. The numbers make the priority unmistakable: Exclusive Agriculture (E-A) covers roughly 312,921 acres and Foothill Agriculture (F-A) about 227,335 acres, with Forest Management and Recreation (FMR) near 68,118 acres, Resource Management (R-M) near 67,086 acres, and Upland Conservation (UC-80) above 10,500 acres. Add Flood Management (F-M) along the rivers and River Frontage (R-F), and the great majority of the county is committed to farming, grazing, forestry, and conservation under large-minimum, low-intensity standards.
For developers, the realistic opportunities are concentrated and small relative to that agricultural backdrop. Residential land appears mostly as rural and low-density designations - Rural Residential (RR-2 and RR-5), Forest Residential (FR), and a handful of in-town single-family districts (R-1, R-1-6, R-1-8) - with very limited Two Family (R-2), Multi Family (R-3), and Apartment Professional (R-4) acreage. Commercial activity is tied to Community Commercial (C-2), Highway Service Commercial (C-H, about 762 acres), Commercial Resort (C-R), and Rural Services (R-S), while industrial uses sit in Light Industrial (M-1) and a large Heavy Industrial (M-2) district near 6,061 acres. The map also recognizes State, Federal, and Other Agency Land (SFA) and Tribal Lands (T-L), reflecting the mosaic of ownership and jurisdiction. Building controls include FAR, lot, density, coverage, height, and full setbacks. Anything beyond agricultural and rural-residential use will hinge on county discretionary review. This is pre-development intelligence, not legal advice - verify with the local planning department before acquisition.
Colusa County Unincorporated zoning: frequently asked questions
What dominates zoning in unincorporated Colusa County?
Agriculture and resource protection, by an enormous margin. Exclusive Agriculture (E-A) covers roughly 312,921 acres and Foothill Agriculture (F-A) about 227,335 acres, with large Forest Management and Recreation (FMR), Resource Management (R-M), and Upland Conservation (UC-80) districts beyond them. The county is structured to preserve farmland, grazing, and habitat rather than to host urban growth.
Can I build housing in the unincorporated county?
Only in limited, mostly low-density forms. Residential options are concentrated in Rural Residential (RR-2 and RR-5), Forest Residential (FR), and small in-town single-family districts (R-1, R-1-6, R-1-8), with very little Two Family (R-2), Multi Family (R-3), or Apartment Professional (R-4) land. Sites in the agricultural districts are protected for farming, so confirm a parcel's specific designation before assuming residential potential.
Where can commercial or resort development go?
Commercial uses are tied to a few districts - Community Commercial (C-2), Highway Service Commercial (C-H) at roughly 762 acres, Commercial Resort (C-R) near 166 acres for tourism and recreation, and Rural Services (R-S). These are the designations to target for retail, lodging, or traveler-serving projects rather than the surrounding agricultural land.
What industrial capacity exists, and where?
The county carries Light Industrial (M-1) near 1,082 acres and a large Heavy Industrial (M-2) district of roughly 6,061 acres, which can support processing, energy, and heavier operations consistent with a resource-based economy. Direct industrial projects to the M-1 and M-2 districts and confirm access, utility, and environmental constraints with the county.
How do agency and tribal land designations affect site selection?
The map separately recognizes State, Federal, and Other Agency Land (SFA) near 3,204 acres and Tribal Lands (T-L) near 842 acres, which fall outside ordinary private development and county land-use authority. Before pursuing any deal, verify ownership and jurisdiction so you are not targeting agency-controlled or tribal land mistaken for developable private parcels.
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Zoning data is pre-development intelligence, not legal advice. Verify with the Colusa County Unincorporated planning department before acquisition or design.