CA AB1751

Creates a ministerial (non-discretionary) approval process for townhome development projects, defined as single-family dwelling units of 3 stories or less that share common walls or are separated by air gaps from neighboring units

Requires local agencies to ministerially approve parcel maps and tentative/final maps for townhome developments on sites zoned for multifamily use or underutilized single-family lots, with minimum parcel sizes of 600 square feet

Exempts townhome projects approved under this process from California Environmental Quality Act (CEQA) review and prohibits local agencies from imposing standards that would physically preclude development meeting specified density requirements

Allows ownership structures including fee simple lots, common interest developments, limited-equity housing cooperatives, community land trusts, and tenancies in common

Prohibits development on protected lands including prime farmland, wetlands, very high fire hazard zones, hazardous waste sites, earthquake fault zones, flood hazard areas, and habitat for protected species