Light Trespass: Gaithersburg vs Rockville
How do light trespass rules compare between Gaithersburg, MD and Rockville, MD?
Gaithersburg and Rockville have similar restriction levels.
Gaithersburg, MD
Montgomery County
Gaithersburg prohibits outdoor lighting that unreasonably trespasses onto neighboring properties. Light from commercial or residential sources must not create a nuisance for adjacent property owners. New development must demonstrate compliance with light trespass limits during site plan review. Montgomery County nuisance provisions provide additional enforcement authority.
View full Gaithersburg rules →Rockville, MD
Montgomery County
Rockville prohibits outdoor lighting that creates unreasonable glare or light trespass onto neighboring properties. Commercial and multifamily projects must limit illumination to 0.5 footcandles at property lines. Residential lighting complaints are handled through the code enforcement nuisance process, and violators must redirect or shield fixtures within 30 days of notice.
View full Rockville rules →Key Facts Comparison
| Fact | Gaithersburg | Rockville |
|---|---|---|
| Property Line Limit | 0.5 footcandles for new development | 0.5 footcandles for commercial |
| Fixture Shielding | Light source must not be visible from neighbors | - |
| Nuisance Standard | Applies to existing properties | - |
| Complaint Process | File with Code Enforcement | - |
| Code Enforcement | 301-258-6330 | 240-314-8530 |
| Correction Period | - | 30 days from notice |
| Security Lights | - | Must illuminate only owners property |
| HOA Rules | - | May impose stricter limits |
Highlighted rows indicate differences between cities.
Gaithersburg FAQ
What can I do about a neighbor's floodlight shining into my windows in Gaithersburg?
First try to resolve it directly with your neighbor. If that does not work, file a complaint with Gaithersburg Code Enforcement at 301-258-6330. The city may require the neighbor to redirect, shield, or remove the offending light.
How much light is allowed at a property line in Gaithersburg?
For new commercial and multi-family developments, illumination at the property line adjacent to residential uses is typically limited to 0.5 footcandles. Existing residential properties are subject to general nuisance standards rather than a specific numeric limit.
Rockville FAQ
How do I report light trespass in Rockville?
Contact Code Enforcement at 240-314-8530 to file a complaint. An inspector will evaluate whether the lighting creates unreasonable illumination on your property and may issue a correction notice to the offending property owner.
Can my neighbor point a floodlight at my house in Rockville?
No. Security and outdoor lighting must be directed to illuminate only the owners property. Lighting creating unreasonable glare on adjacent properties is a nuisance violation subject to correction notices and fines.
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