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Planning commission backs ADU code updates including height and lighting rules, forwards to City Council
Summary
The Westminster Planning Commission on Sept. 3 voted 3‑0 to recommend that City Council adopt zoning amendments (Case 2025‑0183) to update accessory dwelling unit (ADU) rules to align with state law, clarifying ADU allowances on multifamily parcels, height rules, lot coverage, parking, and exterior lighting.
The Westminster Planning Commission voted unanimously on Sept. 3 to recommend that the City Council adopt zoning code amendments to bring the city's accessory dwelling unit (ADU) rules into alignment with state law (Case 2025‑0183).
Staff summarized state changes that must be reflected in local code, noting the state's ADU statutes have evolved since the city's original ADU ordinance. A staff presenter identified multiple changes driven by recent state law: allowing detached ADUs on existing multifamily properties (with limits tied to the number of existing units), permitting attached ADUs to match the height of the underlying zone (allowing two‑story attached ADUs), and allowing detached ADU heights up to 20 feet depending on lot context. Staff…
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