Accessory Structures in Castle Rock, CO (2026)
1 verified accessory structures rules for Castle Rock, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Castle Rock allows accessory dwelling units, but no more than one ADU per lot. Before a building permit issues, the owner must record a deed restriction barring rental of both the primary home and the ADU at the same time, and no separate water/sewer taps are permitted.
Accessory Dwelling Units (ADUs) in Castle Rock
Some RestrictionsCastle Rock Mun. Code Ch. 17.61
No more than one (1) ADU may be created or maintained on a single lot. Prior to issuance of a building permit for an ADU, the property owner shall record a deed restriction... prohibiting the concurrent renting of both the Primary Dwelling Unit and the Accessory Dwelling Unit.
Looking for Douglas County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Castle Rock city rules.
Accessory Structures in Douglas County →