Portland's Outdoor Lighting: The Rules That Matter

Every city handles outdoor lighting a little differently. In Portland, Maine, 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 & Shielding

Every exterior light fixture installed under Portland's Land Use Code must use full cut-off optics that aim illumination onto the site itself, not onto the neighbors. Land Use Code § 6.8.4 makes this a citywide performance standard for all uses, tying compliance to the City of Portland Technical Manual's site-lighting specifications, with the Code Enforcement Officer empowered to act on violations.

Key details: Governing section: Land Use Code § 6.8.4, Exterior Lighting. Fixture standard: Full cut-off fixtures required. Scope: All uses citywide (Article 6). Design reference: City of Portland Technical Manual site standards. Base penalty: $100–$500 fine per offense (§ 1-15).

Land Use Code § 1.5.2 makes any violation of the Code, including the § 6.8.4 lighting standard, an offense "subject to the penalties and remedies provided in Chapter 1, Section 1-15 of the City of Portland Code of Ordinances and 30-A M.R.S. § 4452." Under Code of Ordinances § 1-15, the default fine is not less than $100.00 nor more than $500.00 per offense, and "each act of violation and every day upon which any such violation shall occur shall constitute a separate offense," so an unshielded fixture left in place accrues a new violation daily until corrected.

Dark Sky Rules

Portland's Land Use Code makes full cut-off fixtures the citywide standard for exterior lighting on developed sites, requiring light to be aimed down onto the property rather than spilling onto neighbors. The rule sits in Article 6's performance standards, applies to all uses under the Code effective July 1, 2026, and is echoed by a separate hooded-or-shielded requirement written specifically for office park developments.

Key details: Governing section: Land Use Code § 6.8.4, Exterior lighting. Core standard: Full cut-off fixtures required. Effective date: July 1, 2026. Applies to: All uses under Article 6 performance standards. Office park cross-reference: § 6.4.28.E, hooded/shielded, light shines downward.

Section 1.5.2 makes any owner, occupant, or person in control of a building or premises who violates a Land Use Code provision -- including the Section 6.8.4 lighting standard -- guilty of an offense subject to "the penalties and remedies provided in Chapter 1, Section 1-15 of the City of Portland Code of Ordinances and 30-A M.R.S. § 4452." The Code Enforcement Officer or Building Authority initiates enforcement action, with the Corporation Counsel able to pursue any legal or equitable remedy the Code requires.

The Bottom Line

Portland'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 Portland is broadly strict or permissive.

Keep in mind that Portland 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.