September 24, 2026
Design Considerations for Building a 2 Story ADU
ADU Basics & Types
Designing a 2 story ADU requires careful consideration of zoning regulations and site conditions that influence the project’s feasibility and layout. Local rules often distinguish between one- and two-story accessory dwelling units, affecting factors such as height restrictions, setbacks, and placement on the lot, which in turn shape privacy, light access, and how the ADU integrates with the main residence and neighborhood character. Because requirements vary widely by location, it is important