Accessory Structures in Centennial, CO (2026)
2 verified accessory structures rules for Centennial, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Centennial allows one accessory dwelling unit per single-family lot, capped at 50% of the principal home's footprint and 17 feet tall if detached, with mandatory registration for non-owner-occupants.
Centennial ADU Zoning Rules
Some RestrictionsCentennial Municipal Code § 12-3-603(H)(2), (H)(5)(a), (H)(5)(c)(iii)
b.ADUs are permitted only on a lot containing one single-family detached dwelling....c.Only one ADU shall be permitted per single-family detached dwelling....a.Size. An ADU shall not exceed fifty percent (50%) of the footprint of the principal dwelling unit or the total size of an attic or basement area (including any internal stairwell providing access) where additional construction that would...
Shed & Carport Rules
Centennial lets sheds up to 120 square feet and 10 feet tall sit anywhere in a side or rear yard, but sheds within two feet of the property line need a five-foot opaque screen or a hedge that reaches three feet within 18 months.
Centennial Shed Size and Setback Rules
Some RestrictionsCentennial Municipal Code § 12-3-603(E)(2)
Sheds that are 120 square feet or less in floor area and not more than 10 feet in height to the peak of the roof may be located anywhere in a side or rear yard, provided that: a. If they are located closer than two feet to a side or rear lot line, the area between the shed and the lot line is: i. The location of an opaque wall or fence that is at least five feet in height; or ii. Planted with s...
Looking for Arapahoe County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Centennial city rules.
Accessory Structures in Arapahoe County →