LAW UPDATE
June 10, 2026
California ADU Laws 2026 — The Most Significant Overhaul Since 2017
Six new bills took effect January 1, 2026. SB 543 introduces "deemed approved" consequences for permit delays. AB 462 protects fire-disaster survivors. AB 1154 ends JADU owner-occupancy requirements for units with private bathrooms. Here's what every California homeowner needs to know.
CaliforniaJADUPermittingSB 543
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NEW LAW
June 9, 2026
Massachusetts ADU Law 2025 — What Every Homeowner Needs to Know
On February 2, 2025, the Affordable Homes Act's ADU provisions took full effect — making Massachusetts one of the most significant ADU reform stories of 2025. ADUs are now allowed by right on all single-family lots statewide. No special permit. No owner-occupancy requirement. Here's what changed and what it means for you.
MassachusettsAffordable Homes ActBy-Right ADU
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NATIONAL OVERVIEW
June 8, 2026
Which US States Require ADUs By Right? — Is Yours on the List?
In 2018, fewer than 5 states had statewide ADU preemption laws. As of September 2026, 19 states have an effective statewide ADU law, 3 more are in implementation transition, and 1 is signed but not yet effective — full state-by-state breakdown, verified against each state's own enacted bill text.
All 51 JurisdictionsPreemption2025–2026
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