Grand Terrace, California Zoning Map

The Barton Road Specific Plan (BRSP, 92.22 acres) is the dominant commercial district in Grand Terrace and regulates development intensity, architectural character, signage, and parking along this major arterial corridor. It typically accommodates a range of general commercial, retail, restaurant, and service uses under design review requirements specific to the plan. Developers proposing projects on Barton Road must conform to the specific plan's standards in addition to the city's base zoning code.

The R3 Medium Density Residential zone at 142.59 acres is the primary multifamily location, supplemented by R3-20 (0.82 acres), R3-24 High Density Residential (2.08 acres), and R3-S Multiple Family Senior Citizen Residential (5.97 acres). The R2 Low Medium Density zone at 54.81 acres accommodates duplexes and smaller multifamily configurations. The Gateway Specific Plan's residential sub-district (GSP-R4-20, 46.55 acres) adds planned residential capacity in the city's growth area.

The Gateway Specific Plan covers a planned development area at the western edge of the city, with sub-districts for general commercial (GSP-GC, 33.37 acres), residential (GSP-R4-20, 46.55 acres), park, open space, drainage facilities, and utilities. This area is intended as a mixed-use growth node rather than conventional strip commercial, and the residential sub-district suggests higher-density housing as part of the overall plan. Project feasibility depends on infrastructure timing and the specific development program outlined in the plan document.

The M2 Industrial zone at 150 acres and Restricted Manufacturing (MR, 73.93 acres) together represent over 220 acres of industrial land in a city covering only a few square miles - a meaningful industrial proportion. M2 typically allows heavy manufacturing and storage, while MR limits uses to those with fewer off-site impacts such as light assembly and warehouse operations. The Commercial Manufacturing (CM, 20.16 acres) zone adds a commercial-industrial hybrid option adjacent to the Barton Road corridor.

The Hillside Residential (RH) zone at 300.2 acres covers the Mesa area and carries constraints tied to slope, grading, and fuel modification requirements under both local standards and state fire safety regulations. Building controls in RH include FAR, lot, density, coverage, setback, and height limits, and grading permits typically require geotechnical review. Properties in or near Very High Fire Hazard Severity Zones - which apply to portions of the Highgrove Mesa - face additional building standards under the California Building Code and local fire ordinances.