San Jacinto, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)

The City of San Jacinto (Riverside County, California) sets residential lot coverage in San Jacinto Municipal Code § 17.215.030, Residential Zone Development Standards, through Table 2-4. The table defines the Lot Coverage row as the maximum percentage of a lot that is occupied by primary and accessory structures, and it points to Section 17.800.130 for the definition of lot coverage. The six residential columns read RE 50%, RR 50%, RL 55%, RM 60%, RH 60% and RVH 60%. So the semi-rural and estate zones carry the tightest cap, the standard suburban RL zone sits in the middle, and the medium, high and very-high density zones share the highest figure.

Because the cap counts accessory structures as well as the house, a detached garage, shed or other outbuilding uses up the same allowance as the primary dwelling. Section 17.215.020 requires site plan and design review under Chapter 17.630 for all construction activities, including additions, alterations, construction, reconstruction and remodeling, so a project that pushes coverage is checked against Table 2-4 at that stage.

Two neighboring rules limit how much of a residential lot can be covered. Section 17.215.035 restricts paving within the residential front yard: driveways cannot exceed 35% of the required total front yard area, walkways and hardscape cannot exceed 25% of the required front yard area, and a minimum of 40% of the front yard must be pervious surfaces for landscaping. New driveway paving and hardscape such as walkways and patios needs a zoning clearance under Chapter 17.655.

Accessory dwelling units carry their own coverage ceilings in Section 17.405.060, Subsection G.3, for Class 2 ADUs. That subsection lists 50% in the RL and RR zones, 55% in the RL zone, 60% in the RM, RH and RVH zones, and 75% in the MU zone. The code prints RL in two of those entries, so confirm the RL figure with Development Services before relying on it. Subsection G.1.c adds that no lot coverage limit may force an ADU below 800 square feet of interior livable space.