Lewisville, TX Accessory Structures: Garage Conversions (2026)

Lewisville residential zoning districts typically require a minimum of two enclosed parking spaces per single-family dwelling. Converting a garage to habitable living space requires a building permit from the Inspections Division at (972) 219-3480 and must maintain compliance with the minimum parking requirement. If the conversion eliminates required parking, a replacement garage or carport meeting the parking standard must be provided. The converted space must meet all building code requirements for habitable rooms including minimum ceiling height, natural light and ventilation, egress windows, smoke detectors, and fire separation from the remaining garage. HVAC must be extended to the converted space. Electrical circuits must be upgraded to meet habitable room load requirements. The exterior appearance of the conversion must be compatible with the residential character of the neighborhood. Simply drywalling a garage without proper permits and code compliance is a violation. HOA deed restrictions may impose additional limitations on garage conversions beyond city code requirements. Contact the Inspections Division at (972) 219-3480 for permit requirements and Planning at (972) 219-3600 for zoning verification.