Light Trespass: Flower Mound vs Lewisville

Flower Mound limits light trespass from commercial and multifamily properties to no more than 0.5 footcandles measured at the adjacent residential property line. The town's development standards require photometric plans demonstrating compliance before issuance of building permits for new non-residential projects. Post-construction enforcement uses calibrated light meter readings taken by code compliance officers in response to resident complaints. Residential complaints about excessive lighting from neighboring commercial or multifamily developments are investigated through the code compliance process. For residential-to-residential disputes involving security lights, floodlights, or landscape lighting, the town addresses extreme cases as general nuisances under Chapter 30 of the Code of Ordinances, though specific footcandle limits are not applied between single-family homes. HOA architectural committees in communities like Bridlewood and Wellington often review and restrict exterior lighting installations as part of their design review process.

Lewisville limits light spillover from commercial and multifamily developments onto adjacent residential properties to 0.5 foot-candles at the property line under Unified Development Code Chapter 114. All commercial exterior fixtures must be full-cutoff design directing light downward rather than outward or upward, verified during site plan review and inspected prior to certificate of occupancy. Residential-to-residential light trespass is addressed through general nuisance provisions in Chapter 42 rather than specific illumination limits, with Code Enforcement evaluating complaints on a case-by-case basis. HOA architectural review committees in Castle Hills and Valley Vista may enforce additional exterior lighting standards.