City · Colorado
ADU rules in Boulder
2 sources
These are the primary sources for accessory dwelling unit regulations in Boulder: the city's own zoning code, planning department pages, and permit guides. Start here before talking to anyone: the rules below are what your permit reviewer will apply.
ADU regulations
Colorado statewide law also applies
Colorado sets baseline ADU rights at the state level. Where local rules are stricter than state law allows, state law usually wins, so both are worth reading.
See Colorado statewide rulesSpotted something outdated?
Zoning codes change. If a link is dead or Boulder has updated its ordinance, report it and we'll verify against the official source.
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