Dark Sky Rules: Gaithersburg vs Rockville
How do dark sky rules rules compare between Gaithersburg, MD and Rockville, MD?
Gaithersburg and Rockville have similar restriction levels.
Gaithersburg, MD
Montgomery County
Gaithersburg regulates outdoor lighting through its zoning and development review process. New commercial and multi-family developments must use fully shielded fixtures that minimize light pollution and glare. Montgomery County adopted lighting standards that limit the amount of light trespass onto neighboring properties. Residential exterior lighting is less regulated but must not create a nuisance.
View full Gaithersburg rules →Rockville, MD
Montgomery County
Rockville regulates outdoor lighting through its zoning ordinance to minimize light pollution and glare. New commercial and multifamily developments must use fully shielded fixtures that direct light downward. Residential outdoor lighting must not create glare that interferes with neighboring properties or public roadways.
View full Rockville rules →Key Facts Comparison
| Fact | Gaithersburg | Rockville |
|---|---|---|
| Commercial Standard | Full-cutoff fixtures required | - |
| Property Line Limit | Typically 0.5 footcandles max | 0.5 footcandles maximum |
| Photometric Plan | Required for new development | - |
| HOA Rules | May specify fixture styles | - |
| Planning Contact | 301-258-6330 | - |
| Shielding Required | - | Full-cutoff for commercial and multifamily |
| Parking Lot Height | - | Typically 25 ft max per site plan |
| Standalone Dark Sky Law | - | No, but standards in zoning code |
| Planning Dept | - | 240-314-8200 |
Highlighted rows indicate differences between cities.
Gaithersburg FAQ
Does Gaithersburg have dark sky lighting rules?
Gaithersburg requires fully shielded, full-cutoff fixtures for commercial and multi-family developments. Light trespass at property lines is limited. While not a formal dark-sky ordinance, these standards reduce light pollution.
Can I complain about a neighbor's bright outdoor lights in Gaithersburg?
Yes. If a neighbor's outdoor lighting creates excessive glare or light trespass, you can file a complaint with Code Enforcement at 301-258-6330. The city may require the neighbor to redirect or shield the lighting.
Do HOAs in Gaithersburg regulate outdoor lighting?
Yes. HOA communities like Kentlands and Lakelands typically have architectural guidelines specifying approved fixture types, wattage limits, and placement. Check your HOA CC&Rs for specific requirements.
Rockville FAQ
Does Rockville have a dark sky ordinance?
Rockville does not have a standalone dark sky ordinance, but the zoning code requires fully shielded fixtures for commercial and multifamily developments. Lighting at property boundaries is limited to 0.5 footcandles.
Can my neighbor's floodlight shine onto my property?
Residential lighting that creates unreasonable glare on neighboring parcels may violate nuisance standards. You can file a complaint with Code Enforcement at 240-314-8530.
Do HOAs have lighting rules in Rockville?
Many HOA communities in Rockville have architectural guidelines specifying fixture types, color temperatures, and brightness limits. Check your community's covenants and design standards.
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