Building Setbacks & Zoning in Castle Rock, CO (2026)
3 verified building setbacks & zoning rules for Castle Rock, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
In the R-1 single-family district, the minimum front yard is 25 feet, minimum rear yard is 25 feet for principal buildings, and minimum side yard is 7 feet. Accessory buildings have smaller rear/side setbacks.
Castle Rock R-1 setback requirements
Some RestrictionsCRMC 17.18.040(C)-(E)
Minimum side yard for residential: 1. Principal buildings, 7-feet. 2. Accessory buildings, 2-feet, where located in the rear one-third of the lot. 3. Accessory buildings, 7-feet, where not located in the rear one-third of the lot. 4. All buildings, 25-feet, where abutting a street. 5. For all other uses, the minimum side yard width shall be the equivalent of 1-foot for each 3-feet or ...
Structure Height Limits
In the R-1 district, principal buildings may be up to 35 feet tall and accessory buildings up to 20 feet. Skyline/Ridgeline overlay areas may impose stricter limits to protect views.
Building height limits in Castle Rock
Some RestrictionsCRMC 17.18.040(F)
F. Maximum height of buildings: 1. Principal buildings, 35-feet. 2. Accessory buildings, 20-feet.
Lot Coverage Limits
R-1 lots must be at least 9,000 square feet with 75-foot minimum width. Castle Rock controls buildable area chiefly through minimum yard setbacks rather than a fixed lot-coverage percentage; PD and overlay zones may set specific coverage caps.
Lot size and coverage in Castle Rock R-1
Some RestrictionsCRMC 17.18.040(A), (B)
Development standards for the R-1 District are: A. Minimum area of lot shall be 9,000-square feet. B. Minimum width of lot shall be 75-feet. C. Minimum side yard for residential: 1. Principal buildings, 7-feet. 2. Accessory buildings, 2-feet, where located in the rear one-third of the lot. 3. Accessory buildings, 7-feet, where not located in the rear one-third of the lot. 4. All b...
Looking for Douglas County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Castle Rock city rules.
Building Setbacks & Zoning in Douglas County →