Gaithersburg's Outdoor Lighting: The Rules That Matter

Every city handles outdoor lighting a little differently. In Gaithersburg, Maryland, there are 2 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Light Trespass

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.

Key details: Property Line Limit: 0.5 footcandles for new development. 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.

Lighting that creates a documented nuisance is a code violation. The city may issue a notice of violation requiring corrective action within a specified timeframe. Failure to comply may result in fines. For commercial properties, non-compliant lighting can result in site plan violation notices and withholding of permits for future work.

Dark Sky Rules

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.

Key details: Commercial Standard: Full-cutoff fixtures required. Property Line Limit: Typically 0.5 footcandles max. Photometric Plan: Required for new development. HOA Rules: May specify fixture styles. Planning Contact: 301-258-6330.

Non-compliant lighting on commercial sites may result in withholding of occupancy permits or site plan violation notices. Residential lighting that creates a documented nuisance may trigger code enforcement action. HOA violations for unapproved fixtures or excessive lighting may result in fines and required modifications under the HOA covenants.

The Bottom Line

Gaithersburg's outdoor lighting rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Gaithersburg is broadly strict or permissive.

Keep in mind that Gaithersburg can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.