Bristol County, MA Outdoor Lighting: Dark Sky Rules (2026)
Key Facts
- Fixtures
- Full-cutoff required
- Pole Height
- 20 to 30 feet
- Enforcement
- Site plan review
Summary
Bristol County municipalities regulate outdoor lighting through local zoning to reduce light pollution. Fully shielded fixtures are standard for new commercial development. Residential rules vary by town.
Towns may, for the purposes hereinafter named, make such ordinances and by-laws, not repugnant to law, as they may judge most conducive to their welfare, which shall be binding upon all inhabitants thereof and all persons within their limits. They may, except as herein provided, affix penalties for breaches thereof not exceeding three hundred dollars for each offense, which shall enure to the town or to such uses as it may direct. Notwithstanding the provisions of any special law to the contrary, fines shall be recovered by indictment or on complaint before a district court, or by noncriminal disposition in accordance with section twenty-one D.
Full Breakdown
Bristol County cities and towns regulate outdoor lighting through zoning bylaws and site plan review. New commercial and multi-family lighting typically must use fully shielded (full-cutoff) fixtures directing light downward. Parking lot standards commonly cap pole heights at 20 to 30 feet and require light trespass limits at property lines. Residential outdoor lighting faces less prescriptive rules but must comply with nuisance bylaws. Coastal Dartmouth and Westport have adopted darker-sky provisions to protect shoreline wildlife including sea turtle habitat at Horseneck Beach. Motion sensors are encouraged for security lighting. Existing non-conforming fixtures are often grandfathered unless replaced. Commercial signage lighting has specific rules.
Frequently Asked Questions
What are typical penalties for violating dark sky rules rules?
Sources & Official References
- [1]Source
Other rules in Bristol County
Compare Bristol County to another location·View the Massachusetts outdoor lighting overview
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