Castle Rock, CO Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Front yard (R-1)
- 25 feet minimum
- Rear yard, principal
- 25 feet minimum
- Side yard, principal
- 7 feet minimum
- Accessory rear yard
- 10 feet minimum
- Code section
- CRMC 17.18.040
Summary
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.
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 fraction thereof of building height, provided that, for school or church uses, no side yard shall be less than 25-feet wide.
D. Minimum front yard for all buildings shall be 25-feet.
E. Minimum rear yard:
1. Principal buildings, 25-feet.
2. Accessory buildings, 10-feet.
F. Maximum height of buildings:
1. Principal buildings, 35-feet.
2. Accessory buildings, 20-feet.
(Ord. No. 2019-028 , § 2, 9-17-2019)
Full Breakdown
CRMC 17.18.040 sets R-1 Single-Family Residence District development standards. Minimum front yard for all buildings is 25 feet. Minimum rear yard is 25 feet for principal buildings and 10 feet for accessory buildings. Minimum side yard is 7 feet for principal buildings, 2 feet for accessory buildings in the rear one-third of the lot (7 feet elsewhere), and 25 feet for any building abutting a street. On reversed corner lots the street-side yard must equal the adjoining lot's front yard, and no street-side yard is less than 10 feet (17.52.110). Other districts (R-2, R-3, PD) have their own standards.
Violations & Fines
Building within a required yard without a variance is a zoning violation; the town can deny permits, require removal, or issue citations.
Frequently Asked Questions
How far back must my house sit in R-1?
What are the setbacks for a shed?
Sources & Official References
Other rules in Castle Rock
Compare Castle Rock to another location·View the Colorado building setbacks & zoning overview
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