Westminster regulates ADUs through local zoning. Colorado HB 24-1152 requires certain municipalities to allow ADUs. Rules vary by city.
Colorado passed HB 24-1152 (2024) requiring certain municipalities to allow ADUs on residential lots, but implementation details remain local. Westminster regulates accessory dwelling units through local zoning. Denver, Boulder, and Fort Collins have established ADU ordinances. Common conditions: maximum size (typically 600 to 800 sq ft), setback requirements, owner-occupancy may be required. HOAs may restrict or prohibit ADUs. Building permits required for any habitable structure.
Unpermitted ADU: standard building code enforcement. May require demolition or legalization. Occupying unpermitted dwelling: code violation.
Westminster, CO
Westminster may allow garage conversions with permits. Colorado has no statewide garage conversion mandate. Replacement parking may be required.
Westminster, CO
Westminster allows small sheds without permits (typically under 120 to 200 sq ft). Larger structures need building permits. Setback requirements apply.
See how other cities in Adams County handle adu rules.
See how Westminster's adu rules rules stack up against other locations.
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