Castle Rock, CO Noise Ordinances: Decibel Limits (2026)
Key Facts
- Residential day limit
- 55 dB(A) (7 a.m.-7 p.m.)
- Residential night limit
- 50 dB(A) (7 p.m.-7 a.m.)
- Measured at
- 25 feet from property line
- Short-burst allowance
- +10 dB(A), 15 min/hour
- State authority
- CRS 25-12-103
Summary
Castle Rock's code uses an audibility standard, but Colorado's CRS 25-12-103 supplies the dB backstop: residential noise measured 25 feet from the property line is capped at 55 dB(A) (7 a.m.-7 p.m.) and 50 dB(A) (7 p.m.-7 a.m.).
Residential [zone]: 55 db(A) 7:00 a.m. to next 7:00 p.m., 50 db(A) 7:00 p.m. to next 7:00 a.m. ... measured at a distance of twenty-five feet or more beyond the property line ... shall constitute prima facie evidence that such noise is a public nuisance.
Full Breakdown
Castle Rock Municipal Code Chapter 9.16 primarily uses a plain-audibility test (not audible 100 feet away). Where a numeric measurement is needed, Colorado Revised Statute 25-12-103 provides the maximum permissible noise levels. Sound radiating from a property line, measured at 25 feet or more, that exceeds the listed dB(A) is prima facie evidence of a public nuisance. Residential zones: 55 dB(A) daytime (7 a.m.-7 p.m.), 50 dB(A) nighttime. Commercial: 60/55; light industrial: 70/65; industrial: 80/75. A 10 dB(A) bump is allowed for up to 15 minutes per hour, and periodic, intermittent or shrill noise triggers 5 dB(A) lower. Measurements require wind under 5 mph.
Violations & Fines
Exceeding the CRS 25-12-103 thresholds is prima facie public nuisance, enforceable by the Town. Report to Police / Code Compliance at 303-663-6100.
Frequently Asked Questions
Does Castle Rock's code list specific decibel numbers?
What is the residential nighttime limit?
Sources & Official References
Other rules in Castle Rock
Compare Castle Rock to another location·View the Colorado noise ordinances overview
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