CATEGORY / ADU & Zoning
ADU & Zoning Law
State and local rules that decide what you're allowed to build.
Apr 2025 · 9 min
Washington HB 1337, in plain English
What the 2023 statewide ADU law actually requires of cities — and what it means if you own a single-family lot in the Puget Sound.
Read article →Mar 2025 · 6 min
IRC Appendix AQ — when 'tiny' is the right answer for an ADU
ICC's tiny-home appendix sets the rules for sub-400 sq ft units. Here's where it actually fits in Seattle and the Eastside.
Read article →Jan 2025 · 6 min
DADU or AADU? How to choose for your lot
Detached cottage or carved-out unit inside the home — the right answer depends on your lot, your goals, and your willingness to share a wall.
Read article →