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Planning commission recommends ADU/JADU ordinance updates to comply with new state rules
Summary
Belvedere planning staff presented a comprehensive rewrite of ADU and JADU rules to align the municipal code with recent California legislation; the commission recommended forwarding the draft to city council with clarifications on definitions, height and owner-occupancy language.
Planning staff told the commission that state laws adopted over the last decade — including changes effective in January 2025 — require municipal code updates to limit local discretion for ministerially approved accessory dwelling units (ADUs) and junior ADUs (JADUs). The staff report said the city must allow many ADU types by ministerial review and that public hearings or design review are barred where an application complies with state rules.
Key changes presented included allowing greater height for detached ADUs where the slope at the footprint equals or exceeds 30% (up to a 25‑foot maximum), reduced or eliminated front‑yard setbacks for some ADUs, an extended amnesty period for existing unpermitted units, and clearer rules that parking can only be required when an applicant seeks an exception or conditional use permit. Staff said these changes are intended to conform to state code while preserving local standards where permissible.
Commissioners asked detailed implementation questions: how the 25‑foot height allowance would be applied, whether ministerial approval would still allow staff to consider impacts such as blocked views, how definitions would treat a primary dwelling with an attached ADU, and when fire sprinklers are triggered for new ADUs. The city attorney and planning staff said many detailed standards are implemented at the building‑permit stage and that staff will refine language where needed. Commissioners suggested clarifying owner‑occupancy language (trusts), replacing colloquial materials terms (e.g., replacing 'stucco' with 'plaster'), and making the parking‑requirement sentence read as a request rather than a mandate in one subsection.
After discussion, commissioners voted to recommend the draft zoning amendments to the city council and asked staff to include commissioner comments and suggested clarifications in the council packet. The recommendation moves the ordinance rewrite to the council for final consideration.
