WA People
BILL · 2025–26 SESSION · LATEST VERSION 2SSB 5470

SB 5470: Detached ADUs

Establishing limitations on detached accessory dwelling units outside urban growth areas.

Summary

  • Allows counties to authorize detached accessory dwelling units (ADUs) outside of urban growth areas (UGAs) if the detached ADUs are subject to development regulations that include certain limitations, including that a parcel have no more than one attached or detached ADU.
  • Requires that counties allowing ADUs outside of UGAs follow certain reporting and land use plan update requirements.

From the Senate Bill Report (SB 5470), written by the Legislature's nonpartisan staff. Read the full report ↗

Did not pass Did not pass · stalled on the Senate floor
  1. IntroducedJan 23, 2025
  2. Out of committeeFeb 21, 2025
  3. Passed Senatestopped here
  4. Passed House
  5. Governor
  6. Law
Prime sponsor
Keith Goehner (R-12)
Introduced
January 23, 2025 in the Senate
Last action
February 26, 2026
Budget
Has a fiscal note
Versions
SB 5470, SSB 5470, 2SSB 5470

AN ACT Relating to establishing limitations on detached accessory dwelling units outside urban growth areas;

Sponsors

Prime sponsor: Keith Goehner (R-12)

6 co-sponsors (5 Democrats, 1 Republican)

Jessica Bateman D-22Mike Chapman D-24Noel Frame D-36Chris Gildon R-25T'wina Nobles D-28Rebecca Saldaña D-37

Votes

No recorded floor votes.

History

  1. Senate Rules "X" file. (2SSB 5470)
  2. Senate Rules "X" file. (SSB 5470)
  3. Senate Rules "X" file.
  4. Placed on second reading by Rules Committee. (2SSB 5470)
  5. Placed on second reading by Rules Committee. (SSB 5470)
  6. Placed on second reading by Rules Committee.
  7. Passed to Rules Committee for second reading. (2SSB 5470)
  8. HSG - Majority; 2nd substitute bill be substituted, do pass. (2SSB 5470)
  9. HSG - Majority; 2nd substitute bill be substituted, do pass. (SSB 5470)
  10. Passed to Rules Committee for second reading. (SSB 5470)
  11. Passed to Rules Committee for second reading.
  12. HSG - Majority; 2nd substitute bill be substituted, do pass.
  13. Rules Committee relieved of further consideration. On motion, referred to Housing. (SSB 5470)
  14. By resolution, reintroduced and retained in present status. (SSB 5470)
  15. Rules Committee relieved of further consideration. On motion, referred to Housing.
  16. By resolution, reintroduced and retained in present status.
  17. Senate Rules "X" file. (SSB 5470)
  18. Senate Rules "X" file.
  19. Placed on second reading by Rules Committee. (SSB 5470)
  20. Placed on second reading by Rules Committee.
  21. Passed to Rules Committee for second reading. (SSB 5470)
  22. Passed to Rules Committee for second reading.
  23. WM - Majority; without recommendation. (SSB 5470)
  24. WM - Majority; without recommendation.
  25. Referred to Ways & Means. (SSB 5470)
  26. Referred to Ways & Means.
  27. And refer to Ways & Means. (SSB 5470)
  28. HSG - Majority; 1st substitute bill be substituted, do pass. (SSB 5470)
  29. HSG - Majority; 1st substitute bill be substituted, do pass.
  30. And refer to Ways & Means.
  31. First reading, referred to Housing.

SB 5470 in other sessions

Bill numbers restart every two years, so the same number is a different bill in each session.

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