Industrial-district buildings and appurtenant structures are limited to 75 feet in height; additional height for storage towers, transmitting towers, advertising signs, or non-occupiable structures requires a use permit.

Industrial-district projects must meet street-specific front and corner-side setbacks: 70 feet from an existing centerline or 15 feet from a planned street line on a major street or expressway, 45 feet from the centerline on a collector street, and 40 feet from the centerline on a minor street.

Industrial-district loading areas must allow trucks to maneuver, load, and unload without using a public street or highway, and building vehicle openings must be at least 20 feet from the facing property line.

Industrial-district interior side and rear yards must comply with the Uniform Building Code based on the use, occupancy, and construction type.

Industrial-district operations may not cause an unreasonable amount of off-site-detectable noise, odor, dust, smoke, vibration, or electrical interference.

An eight-foot masonry wall is required along industrial property lines adjacent to residential or agricultural zoning, or Planned Development zoning used for residential purposes, except where a building abuts an alley.

Industrial-district projects must provide off-street parking under Chapter 21.76, and required parking may not be located in building setback areas or required yards.

Industrial-district building coverage is limited to 75 percent of the lot area.

If a data center is treated as a use not specifically listed in the parking regulations, the Planning Commission determines the required parking based on the use's motor-vehicle intensity.

Parking requirements can require one space per 300 square feet for offices, or for manufacturing, assembly, and wholesale warehouse uses, one space per employee on the maximum shift plus three spaces, or one space per 300 square feet when employee counts are unknown.

Development in a Planned Industrial district requires an approved development plan addressing proposed uses, chemicals or wastes, building layout, parking and loading, circulation, landscaping, and sewage disposal.

Planned Industrial projects must connect to sanitary sewer and approved public water when available, landscape at least five percent of each parcel or development phase, limit buildings to 70 percent of the parcel, place utilities underground, and generally provide an eight-foot masonry wall next to residential or agricultural zoning.

New subdivisions in an Industrial Business Park district generally must provide lots of at least five acres, buildings of at least 50,000 square feet, 15-foot front and rear setbacks, 10-foot side setbacks, no more than 50 percent site coverage, and a 45-foot height limit.

New subdivisions in a Light Industrial district generally must provide lots of at least two acres, buildings of at least 25,000 square feet, 15-foot front and rear setbacks, 10-foot side setbacks, no more than 50 percent site coverage, and a 45-foot height limit.

Industrial Business Park and Light Industrial projects require preliminary and final landscape and irrigation plan approval; industrial or manufacturing parking areas must devote at least six percent of their gross area to landscaping and provide one tree per ten parking spaces.

Industrial Business Park and Light Industrial operations may not produce visible dust, gases, or smoke, off-site glare or heat, perceptible ground vibration without instruments, or odors or fumes perceptible at the property line.

Where a use permit is required, the applicant must undergo a public hearing, generally with notice to property owners within 300 feet; the Planning Commission may impose conditions, and no building permit may be issued until the use permit is granted.

Use permits are conditional and revocable, and land-use permits generally become void 18 months after final approval unless the required approval and implementation conditions are satisfied; a use permit or variance may receive an extension of up to one year.

A building or land use must conform to its zoning district, and permits cannot be issued for conflicting uses; uses prohibited by local, state, or federal law are not allowed in unincorporated zoning districts.

Projects requiring discretionary approval within a city's LAFCO-approved sphere of influence generally require the city's written approval before County approval, except for agricultural uses and churches.

In an Urban Services combining district, development cannot occur until the property is annexed to and receives service from the applicable sanitary, water, or community services district.

A zoning change may require Planning Commission and Board of Supervisors public hearings, notice, and a formal amendment process; after denial, the application generally cannot be resubmitted for one year absent new evidence or changed conditions.

A variance cannot authorize a use prohibited by the zoning district; it requires a public hearing, notice to property owners within 300 feet, specified hardship findings, and generally a one-year waiting period before reapplication after denial absent new evidence or changed conditions.

All industrial uses are permitted in the M district unless specifically listed as requiring a use permit, allowing qualifying data-center operations to proceed without discretionary use-permit approval.

Buildings and appurtenant structures in the M district may be up to seventy-five feet high.

Fireproof structures in the M district that are not used for human occupancy have no height limit, except for advertising structures.

The M district allows up to seventy-five percent lot coverage, allowing substantial building coverage on an industrial site.

The Industrial Business Park district permits communication-systems research and development, computer-systems research and development, software development, wholesale distribution, public infrastructure, and related technology-support industries, subject to district development standards. Permitted IBP uses

The Light Industrial district permits computer-systems research and development, software development, warehouses, wholesale distribution, electronic repair and assembly, and manufacturing and technology-support industries, subject to district development standards. Permitted LI uses

In the IBP and LI districts, an expansion of an existing industrial use involving less than 25 percent of the existing building floor area may receive administrative approval from the Planning Director or staff; larger expansions may proceed through a conditional use permit. Expansion permit thresholds

The IBP district provides standards for large facilities, including a five-acre minimum lot, 50,000-square-foot minimum building, 45-foot maximum height, 50 percent maximum site coverage, and specified setbacks. IBP development standards

The LI district provides standards for large facilities, including a two-acre minimum lot, 25,000-square-foot minimum building, 45-foot maximum height, 50 percent maximum site coverage, and specified setbacks. LI development standards

The Planned Industrial district allows offices, laboratories, research institutions, communications facilities, public utilities, warehouses, and computer- or technology-related assembly uses when consistent with the General Plan and an approved development plan. PI permitted uses

In a Planned Development district, an approved development plan may establish project-specific lot sizes, setbacks, parking, height, density, and coverage standards that differ from conventional zoning requirements. P-D development standards

In a Planned Development district, uses consistent with the General Plan may be allowed subject to Planning Commission approval of the development plan. P-D permitted uses

Communication facilities, including towers, antennas, microwave dishes, and equipment shelters, may be permitted in any zoning district through staff approval when they meet siting standards, or through a use permit when they do not. Communication-facility permitting

Communication facilities that meet the siting standards receive staff-level processing instead of Planning Commission use-permit processing; the standards include a maximum 130-foot tower height and a separation from adjoining residential structures of at least twice the tower height. Communication-facility siting standards

A lawful nonconforming use may continue after zoning changes. Minor changes that do not alter the use's character and expand the building or use by no more than 25 percent may receive staff approval. Continuation of nonconforming uses

The County may approve enlargement, expansion, restoration, or a change to a use of equal or lesser intensity for a legal nonconforming use through a use permit if specified findings concerning neighborhood impacts, public welfare, and zoning suitability are met. Nonconforming-use expansion process

Public-utility facilities, including electrical substations, communication equipment buildings and towers, pumping stations, and water wells, are allowed in A-2 and residential districts subject to a use permit showing they will not harm or conflict with nearby agricultural or residential uses. Public-utility facilities

Public-utility transmission and distribution lines are permitted in all zoning districts without height limitations, although metal transmission towers remain subject to applicable yard requirements. Utility-line allowance