Showing ordinances that apply to Loma Mar, CA
Loma Mar is an unincorporated community (population 134) in San Mateo County, California. Because Loma Mar is not an incorporated city, it does not have its own municipal code. Instead, San Mateo County ordinances apply directly to properties here. The setback rules rules below are the ones that govern your area.
San Mateo County parcels are assigned BOTH a Use District (R-1, R-2, RH, C, M, A, RM) AND a paired Development Standards 'S' District (e.g., S-101, S-17, S-94) that sets specific setbacks, lot coverage, FAR, and height. Typical R-1/S-100-series residential setbacks: 20-25 ft front, 5-10 ft sides, 15-20 ft rear, with increased side setbacks on corner lots. The Design Review (DR) overlay, Coastal Zone, and Resource Management (RM) districts impose additional constraints.
Unincorporated San Mateo County uses a dual-district zoning system: the Use District (R-1 One-Family Residential, R-2, RH Residential Hillside, RM Resource Management, A Agricultural, etc.) sets what you can build, while the paired S-District (Development Standards) sets dimensional rules. Typical S-100 (minimum 5,000 sq ft R-1 lot) standards: 20 ft front, 5 ft side, 15 ft rear setbacks, 45% lot coverage, 36 ft height. S-17 (20,000 sq ft lots, common in Emerald Hills): 25 ft front, 10 ft sides, 20 ft rear, 35% coverage. Corner lots typically require the street-side setback to match the front setback. Resource Management and hillside districts often require larger setbacks, habitat buffers, and slope-stability reviews. Eaves may encroach up to 30 inches into a setback; chimneys and bay windows up to 2 feet. Decks under 30 inches above grade can project into rear setbacks. Variances require public hearing before the Planning Commission. ADUs have state-preempted reduced setbacks (4 ft side/rear) under Gov Code §65852.2. Coastal Zone projects may require Coastal Development Permits even for setback-compliant additions.
Building in setback: stop-work order under Building Code §114, retroactive variance required (public hearing) or removal. Fines $100-$1,000 per §1.04. Unpermitted structure in setback: may require demolition at owner cost.
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