Siskiyou County Unincorporated, California Zoning Map

AG-2-B-40 is the single largest zone in the dataset at over 920,000 acres and establishes a 40-acre minimum parcel size for building site creation. Residential uses are typically limited to one dwelling unit per parcel, and agricultural operations are the primary permitted use. Subdivision below 40 acres requires a general plan amendment and is rarely approved given the county's commitment to agricultural land preservation. This designation is the backbone of Siskiyou County's extensive ranching and farming economy.

The PD zones at 1,880 total acres cover a range of master-planned communities and resort projects across the county. PD-CHALETS at 14 acres is a notable niche designation supporting vacation cabin and resort chalet development, likely associated with ski or recreation areas. Development within any PD zone must comply with the applicable planned development permit or specific plan document rather than the base zoning code - obtain the governing plan document before evaluating any PD site.

Heavy Industrial (M-H) at 2,255 acres, Light Industrial (M-M) at 683 acres, and Limited Industrial (M-L) at 40 acres together provide roughly 2,978 acres of industrial-designated land, serving primarily timber products processing, aggregate extraction, and resource-based manufacturing. These industrial zones are distributed across the county near active resource operations and highway corridors. New industrial development must address access road standards, environmental review, and - in many cases - proximity impacts on adjacent agricultural or residential parcels.

Like most large rural California counties, Siskiyou allows rural residential uses within agricultural base zones subject to minimum lot sizes - for example, AG-1-B-40 allows one residence per 40 acres and AG-2-B-80 per 80 acres. The county's zoning ordinance distinguishes between uses permitted by right, uses requiring an administrative permit, and uses requiring a conditional use permit. Buyers should confirm which use category applies to their intended residential or accessory structure plans under the specific zone subdistrict.

Siskiyou County's Open Space (O) zone at 3,455 acres, the PD-CHALETS designation, and recreation-adjacent commercial zones support resort, eco-tourism, and outdoor recreation development near major recreation assets including Mount Shasta, the Klamath National Forest, Trinity Alps, and multiple rivers and reservoirs. Conditional use permits are typically required for resort lodges, campgrounds, and similar facilities in agricultural and open space zones. The county's tourism economy creates a distinct opportunity set for hospitality and recreation-oriented real estate investors.