Santa Rosa, California Zoning Map

The SA suffix is applied to Commercial General, Community Mixed Use, Business Park, Commercial Neighborhood, and Commercial Office zones along the North Santa Rosa SMART station corridor, signaling that these parcels are designated for higher-intensity transit-oriented development. SA-overlay zones typically have distinct height limits, floor area allowances, reduced parking requirements, and active ground-floor use requirements compared to their base zone equivalents. Developers evaluating station-area parcels should review the SMART Corridor Specific Plan or relevant area plan for the full suite of development standards applicable to SA-designated sites.

MMH, MMH-S (Small), and MMH-S-F (Small Flex) overlays appear on Commercial General and Community Mixed Use parcels and are designed to enable townhomes, triplexes, fourplexes, and small apartment buildings in corridors that would otherwise be commercial-only. MMH-S-F designations in particular indicate parcels where small-scale multifamily is encouraged alongside flexible ground-floor commercial uses. These overlays represent Santa Rosa's response to state housing mandates and its goal of creating walkable, housing-rich corridors near transit and commercial nodes.

The Tubbs Fire destroyed over 5,000 homes in the Coffey Park and Fountaingrove neighborhoods, triggering one of the largest urban residential rebuild efforts in California history. Much of the rebuilt housing is now governed by updated fire-safe construction requirements. Infill development and lot assembly in affected neighborhoods are active opportunities but require fire hazard assessment, compliance with current building code fire-resistance standards, and in some cases defensible space analysis. Developers targeting residential sites in Santa Rosa should confirm whether a parcel is in a State Responsibility Area or Very High Fire Hazard Severity Zone.

R-3 series zones (R-3-15, R-3-18, R-3-25, R-3-30) represent the multifamily residential spectrum, with density parameters embedded in the zone code number (e.g. R-3-15 = 15 units per acre base). Community Mixed Use (CMU, CMU-DSA) and Commercial General/R-3-15 overlay combinations (e.g. CG/R-3-15, CG/R-3-15-MMH) create additional mixed-use residential development capacity along commercial corridors. California density bonus law and ADU statutes apply citywide and are actively used in Santa Rosa given ongoing housing demand and infill pressure.

Commercial Downtown 7 (CD-7) and its variants (CD-7-SA, CD-7/CD-10-SA) represent the downtown core where the most intensive commercial and mixed-use development is envisioned. The numerical suffix (7, 10) refers to specific downtown sub-area designations in the city's form-based downtown code framework. The CD-7/CD-10-SA combination covering the North Station Area downtown interface is particularly significant for transit-oriented mixed-use projects. Downtown projects in Santa Rosa also interact with Historic combining (H suffix) designations on certain parcels, requiring design review that is sensitive to historic resources.