Garage conversion rules in Lehi, UT — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions to living space in Lehi require a building permit and must meet residential building code requirements. Converting to an ADU requires compliance with ADU standards including owner occupancy, lot size, and parking requirements.
Converting a garage to habitable space or an ADU in Lehi requires a building permit from Building Services at (385) 201-1035. The space must meet residential building code for insulation, egress, ventilation, and utilities. If converting to an ADU, all ADU requirements apply — owner occupancy declaration, minimum 300 sq ft dwelling area, and one dedicated off-street parking space. Garage conversions that reduce off-street parking below required minimums require additional parking solutions. Contact Lehi Planning at (385) 201-1030 for zoning clearance.
Conversion without permit: stop-work order, fines. Inadequate parking after conversion: zoning citation.
Lehi, UT
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Side-by-side rule comparisons with other cities in Utah County.
See how other cities in Utah County handle garage conversions.
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