Garage conversion rules in Boulder, CO — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Boulder may allow garage conversions with permits. Colorado has no statewide garage conversion mandate. Replacement parking may be required.
Colorado has no statewide law facilitating garage conversions. Boulder may allow conversions with building permits meeting habitable space code: ceiling height, ventilation, egress, insulation, electrical, plumbing. Replacement parking typically required since most Colorado cities have minimum parking standards. Zoning approval may be needed. HOAs commonly prohibit garage conversions. Insulation and heating requirements significant due to Colorado’s cold winters.
Unpermitted conversion: building code enforcement. Must bring to code or restore. Safety violations: immediate correction.
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See how Boulder's garage conversions rules stack up against other locations.
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