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.

Dark Sky Rules

Gaithersburg requires new and replacement outdoor light fixtures to be full cut-off or directionally shielded so light stays on the intended target and off the property line, and it bans lasers, searchlights, strobe lights, and blinking lights outright, aside from temporary holiday displays.

Key details: Fixture standard: Full cut-off or directionally shielded. Prohibited devices: Lasers, searchlights, strobe/blinking lights. Banned sources: Low-pressure sodium, mercury vapor. Pedestrian fixture height: 12-14 ft on pole or wall. Bollard lamp cap: 4 feet above grade.

A nonconforming or unshielded fixture installed after the effective date is a zoning violation enforced through Article 15 of Chapter 24, subject to municipal infraction fines under section 1-7 of the City Code and a corrective order from the planning or code enforcement office; each day of continued noncompliance counts as a separate offense.

Light Trespass & Shielding

Gaithersburg caps outdoor light spilling onto neighboring land at 0.5 foot-candles measured at the property boundary, and any lighting on a lot next to single-family homes must carry opaque shielding on the residential side of the fixture to cut glare.

Key details: Boundary illumination cap: 0.5 foot-candles at property line. Residential-adjacent shielding: Opaque shield on residential side. Parking lot glare rule: No glare into abutting residences. Applies to: New/replacement fixtures citywide. Enforcement: Municipal infraction, Article 15.

Exceeding the 0.5 foot-candle boundary limit or operating an unshielded fixture next to single-family residential property is a zoning violation under Chapter 24, enforced through Article 15's municipal infraction process with fines set under section 1-7 of the City Code and treated as a continuing daily violation until corrected.

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.