Everything an ADU does for your property — in one map.

California Accessory Dwelling Unit (ADU) guide for homeowners.

Covers the six ADU archetypes — detached, attached, garage conversion, two-story garage with addition (max SF), pre-fab/modular, and Junior ADU (JADU).

Four pillar topics: value & rental income, livability & layout, design & finish, and build cost & timeline.

California state law permits one ADU on every eligible single-family lot. 2026 cost ranges run roughly $250-$525 per square foot before adders, depending on type and finish level.

Free property report at /trubee shows ADU feasibility for any California address.