Every Phase 1 LA-area city's garage-conversion adu cost page, in one place, sorted by cost-tier.
Conversion of an existing detached or attached garage to an ADU, 350–500 sqft, standard finishes.
California typical range (2026): $85,000–$185,000 standard tier across LA-area cities.
What anchors the schedule: Same state ADU permit track as detached, but foundation-reuse and electrical-service-upgrade decisions drive the cost.
Garage-Conversion ADU cost, Garage-Conversion ADU cost Los Angeles, Garage-Conversion ADU cost California, Garage-Conversion ADU permit, TRUbee project hub, construction cost comparison.