Santa Rosa outlines optional "missing middle" housing overlay; public raises parking, water and notice concerns

City of Santa Rosa planners presented a proposed missing middle housing overlay on Oct. 27, 2025, describing it as an optional zoning layer that would allow homeowners and developers to add small-scale multifamily housing — duplexes, triplexes, fourplexes, cottage courts and similar types — in walkable neighborhoods without removing existing rights.

The initiative, described by staff as a pilot, would apply to mapped areas in and around downtown and other walkable nodes and include two primary overlay sizes (small and medium) with subzones for certain design or retail frontages. Amy (city planner) said, “If you received a notice in the mail, that means that your property is proposed to have this added option for housing,” and added that the proposal is not final and would go through the design review and preservation board, the planning commission and the city council for public hearings.

The overlay is presented as an optional, form‑based alternative to existing zoning. Staff emphasized scale and street interaction: most missing middle building types would be house scale (generally two to two‑and‑a‑half stories, up to three stories in medium areas), with units commonly 500–1,000 square feet, porches or stoops that face public ways, parking typically at the rear and communal open space. Nancy (city staff member) said the overlay is “not required” and “just gives you the option” to consider adding units.

Key provisions and technical details described by staff: - Density ranges the presentation associated with the overlay: medium density at about 8–18 dwelling units per acre, medium‑high at about 18–30 units per acre, and up to about 40 units per acre near…