
3 page PDF
The Southern California ADU Guide
Costs, code, timelines and rental math for 2026
- What an ADU realistically costs per square foot, by construction type
- State law vs. city overlays: setbacks, height, parking and owner occupancy
- The permit sequence in LA, Orange and Ventura counties, step by step
- A rent-vs-cost worksheet to test whether the numbers work on your lot


