New Haven, CT Holiday Decorations: Holiday Light Rules (2026)

New Haven's Code of Ordinances contains no provision specifically regulating residential holiday lighting timing or duration. Residents may install holiday lights at any time of year and leave them in place indefinitely without violating a discrete 'holiday lights' ordinance. Three general constraints apply. First, the New Haven Code nuisance provisions authorize enforcement against conditions that injuriously affect health, safety, comfort, or property of others. Extraordinarily bright displays aimed directly into a neighbor's bedroom window, or accompanying loud music or generators, can rise to nuisance together with the local noise ordinance and Connecticut common-law private nuisance. Second, the New Haven Zoning Ordinance includes sign regulations governing commercial and residential signage; ordinary holiday lights are not 'signs' under the ordinance's definitions, but illuminated decorative messaging or commercial holiday advertising on a residence may be reclassified as signage subject to district limits. Third, the New Haven right-of-way (controlled by the city's Department of Public Works under the Code and CGS Section 13a-149) prohibits placement of signs, lights, banners, or decorations on the tree lawn between the sidewalk and curb (the 'tree belt' in Connecticut usage), on utility poles owned by United Illuminating, Eversource, or the city, on traffic-control devices, and on the public sidewalk where they obstruct passage. Items placed in the right-of-way are subject to removal by the Department of Public Works with the property owner billed for cleanup costs. Electrical safety: outdoor extension cords and light strings must be UL-listed for outdoor use and connected to GFCI-protected circuits under the National Electrical Code as adopted by Connecticut through the Connecticut State Building Code (CGS Section 29-252). Historic district properties (East Rock, Wooster Square, Westville Village, Hillhouse Avenue, Howe Street, and others designated under CGS Section 7-147a) face no calendar restriction but the New Haven Historic District Commission can review permanent installations affecting protected facades.