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WashingtonHB 10962025-2026 Regular SessionHouseWALLET

Increasing housing options through lot splitting.

Sponsored By: Andrew Barkis (Republican)

Became Law

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Bill Overview

Analyzed Economic Effects

3 provisions identified: 0 benefits, 1 costs, 2 mixed.

Quicker lot splits for homeowners

The law creates a simple, administrative way to split one residential lot into two and pair it with a home building permit. Cities can approve it without a public hearing and with only administrative design review. If you meet clear rules, the city must approve and there is no administrative appeal. Key rules include: only one new lot; both lots meet local minimum size and any minimum density; the lot is in a residential zone and buildable under local codes. You must show water and sewer are available, grant needed access and utility rights before recording, and record a survey that bans future lot splits under this law. If renters would be displaced by demolition or alteration, you must propose a mitigation plan. Cities cannot lower the total number of homes allowed below what zoning allowed before the split. Lots made under this process, or made by this process before, cannot be split again under this process. Usual state and local building codes still apply, and cities must decide within the state’s set time limits.

Cities must adopt lot-split rules

Cities must add these lot-split rules on a set timeline. Cities with a 2027 plan update include them in that update; others have two years from the law’s effective date. The state Department of Commerce provides guidance to help cities implement. Local ordinances that comply with this section cannot be appealed under the state environmental policy law. Cities are also protected from liability tied to approving lot splits under this law.

Right-of-way and frontage costs possible

Cities can require you to dedicate right-of-way as part of an administrative lot split, if local rules would normally require it. They can also require you to build frontage improvements next to the parent or new lot, when those improvements are required by local standards. These are one-time conditions tied to normal codes and design rules.

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Sponsors & Cosponsors

Sponsor

  • Andrew Barkis

    Republican • House

Cosponsors

  • Adam Bernbaum

    Democratic • House

  • Adison Richards

    Democratic • House

  • April Connors

    Republican • House

  • Beth Doglio

    Democratic • House

  • Cindy Ryu

    Democratic • House

  • Dan Bronoske

    Democratic • House

  • Davina Duerr

    Democratic • House

  • Joe Fitzgibbon

    Democratic • House

  • Joe Timmons

    Democratic • House

  • Julia Reed

    Democratic • House

  • Lisa Callan

    Democratic • House

  • Mari Leavitt

    Democratic • House

  • Mark Klicker

    Republican • House

  • Mary Fosse

    Democratic • House

  • Monica Jurado Stonier

    Democratic • House

  • Natasha Hill

    Democratic • House

  • Nicole Macri

    Democratic • House

  • Sharon Wylie

    Democratic • House

  • Steve Tharinger

    Democratic • House

  • Timm Ormsby

    Democratic • House

  • Travis Couture

    Republican • House

Roll Call Votes

All Roll Calls

Yes: 230 • No: 12

House vote • 4/27/2025

Final Passage as Amended by the Senate

Yes: 94 • No: 4

Senate vote • 4/14/2025

3rd Reading & Final Passage as Amended by the Senate

Yes: 43 • No: 4 • Other: 2

House vote • 3/6/2025

3rd Reading & Final Passage

Yes: 93 • No: 4 • Other: 1

Actions Timeline

  1. Effective date 7/27/2025.

    5/17/2025House

  2. Chapter 301, 2025 Laws.

    5/17/2025House

  3. Governor signed.

    5/17/2025legislature

  4. Passed final passage; yeas, 94; nays, 4; absent, 0; excused, 0.

    4/27/2025House

  5. House concurred in Senate amendments.

    4/27/2025House

  6. President signed.

    4/27/2025legislature

  7. Speaker signed.

    4/27/2025legislature

  8. Delivered to Governor.

    4/27/2025legislature

  9. Third reading, passed; yeas, 43; nays, 4; absent, 0; excused, 2.

    4/14/2025House

  10. Rules suspended. Placed on Third Reading.

    4/14/2025House

  11. Floor amendment(s) adopted.

    4/14/2025House

  12. Placed on second reading by Rules Committee.

    4/2/2025House

  13. Passed to Rules Committee for second reading.

    3/27/2025House

  14. HSG - Majority; do pass.

    3/26/2025House

  15. First reading, referred to Housing.

    3/10/2025House

  16. Third reading, passed; yeas, 93; nays, 4; absent, 0; excused, 1.

    3/6/2025House

  17. Rules suspended. Placed on Third Reading.

    3/6/2025House

  18. Floor amendment(s) adopted.

    3/6/2025House

  19. 2nd substitute bill substituted.

    3/6/2025House

  20. Rules Committee relieved of further consideration. Placed on second reading.

    3/5/2025House

  21. Referred to Rules 2 Review.

    2/21/2025House

  22. APP - Executive action taken by committee.

    2/20/2025House

  23. APP - Majority; 2nd substitute bill be substituted, do pass.

    2/20/2025House

  24. Referred to Appropriations.

    1/29/2025House

  25. HOUS - Majority; 1st substitute bill be substituted, do pass.

    1/27/2025House

Bill Text

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