San Joaquin County Unincorporated, California Zoning Map

AG-40 stands for General Agriculture with a 40-acre minimum parcel standard - it is the county's largest zone by far at over 454,000 acres. Converting or subdividing AG-40 parcels typically requires a general plan amendment or, at minimum, a specific plan, and the county has a strong agricultural preservation policy. Projects proposing non-agricultural uses must demonstrate compatibility with surrounding farm operations and comply with the California Environmental Quality Act.

Industrial activity clusters in the Limited Industrial (I-L, ~2,900 acres), Warehouse Industrial (I-W, ~1,100 acres), General Industrial (I-G, ~1,700 acres), and Truck Terminal (I-T, ~174 acres) districts. These zones are governed by FAR, lot, coverage, and height controls. The county's position along Interstate 5 and Highway 99 makes the I-W and I-T designations particularly relevant for logistics and distribution users seeking large-format sites outside city limits.

Rural residential development is primarily channeled into the R-L Low Density (~6,900 acres), R-R Rural Residential (~5,900 acres), R-M Medium Density (~302 acres), and R-VL Very Low Density (~1,450 acres) districts. Each carries distinct density controls and minimum lot sizes. The Limited Agriculture zones (AL-5 and AL-10, totaling ~22,000 acres) also permit limited residential development, often as a secondary use to ongoing agricultural activity.

The AU-20 district spans about 26,700 acres and functions as a holding zone for land that is currently agricultural but anticipated for eventual urban transition - typically land adjacent to city boundaries or within sphere-of-influence areas. Development rights are restricted until the county general plan or a specific plan formally designates the land for urban uses. Investors tracking long-range growth should monitor city annexation proposals and general plan update cycles in relation to AU-20 parcels.

Yes - the Commercial Recreation (C-R) district covers about 964 acres, which is notably larger than most other individual commercial categories in the county. This designation typically accommodates resorts, golf courses, campgrounds, and event venues. The C-RS Rural Service Commercial designation (~137 acres) serves traveler-oriented retail and services at rural crossroads. Both categories are subject to density, height, and setback controls that shape what can be built.