Washington · 2025-2026 Biennium (69th Legislature)

Concerning the creation of building codes for kit homes.

AN ACT Relating to the creation of building codes for kit homes;

ESSB 5552·Senate·Bill

Sen. Jeff WilsonState Senate · LD-19·20 cosponsors

Fiscal noteState YesLocal Yes

Effective dateJune 11, 2026

Floor votes

Senate · 3rd Reading & Final Passage · ESSB 5552Mar 4, 202549–0

Senate · 3rd Reading & Final Passage · ESSB 5552Jan 21, 202649–0

House · 3rd Reading & Final Passage · ESSB 5552Mar 3, 202693–0

Legislative history

Jan 28, 2025

First reading, referred to Local Government.

Feb 20, 2025

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

Feb 21, 2025

Passed to Rules Committee for second reading.

Mar 3, 2025

Placed on second reading by Rules Committee.

Mar 4, 2025

1st substitute bill substituted.

Mar 4, 2025

Rules suspended. Placed on Third Reading.

Mar 4, 2025

Third reading, passed; yeas, 49; nays, 0; absent, 0; excused, 0.

Mar 6, 2025

First reading, referred to Local Government.

Apr 1, 2025

LG - Executive action taken by committee.

Apr 1, 2025

LG - Majority; do pass with amendment(s).

Apr 2, 2025

Referred to Rules 2 Review.

Apr 27, 2025

By resolution, returned to Senate Rules Committee for third reading.

Jan 12, 2026

By resolution, reintroduced and retained in present status.

Jan 13, 2026

Placed on third reading by Rules Committee.

Jan 21, 2026

Rules suspended.

Jan 21, 2026

Returned to second reading for amendment.

Jan 21, 2026

Floor amendment(s) adopted.

Jan 21, 2026

Rules suspended. Placed on Third Reading.

Jan 21, 2026

Third reading, passed; yeas, 49; nays, 0; absent, 0; excused, 0.

Jan 26, 2026

First reading, referred to Local Government.

Feb 20, 2026

LG - Executive action taken by committee.

Feb 20, 2026

LG - Majority; do pass.

Feb 23, 2026

Referred to Rules 2 Review.

Feb 25, 2026

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

Mar 3, 2026

Rules suspended. Placed on Third Reading.

Mar 3, 2026

Third reading, passed; yeas, 93; nays, 0; absent, 0; excused, 5.

Mar 4, 2026

President signed.

Mar 5, 2026

Speaker signed.

Mar 9, 2026

Delivered to Governor.

Mar 14, 2026

Governor signed.

Mar 14, 2026

Chapter 41, 2026 Laws.

Mar 14, 2026

Effective date 6/11/2026.

Bill text

Original Bill Substitute Bill Engrossed Substitute Bill as Passed Legislature

Amendments

Floor amendment by Duerr (Not considered)Committee amendment by Local Government (Not considered)Floor amendment by Wilson, J. (Adopted)

Bill reports

Senate Bill Report (Orig.) — Initial Bill Report 02-06-25 Senate Bill Report — Testimony Added 02-06-25 Senate Bill Report — Reported by LGV 02-20-25 Substitute Senate Bill Report — Passed Senate 03-04-25 Substitute House Bill Analysis 2025 — Initial House Analysis 03-26-25 Substitute House Bill Report — Reported by LG 04-01-25 Substitute Senate Bill Report — As of 3rd Reading 01-08-26 Engrossed Substitute Senate Bill Report — Passed Senate 01-21-26 Engrossed Substitute House Bill Analysis 2026 — Initial House Analysis 02-18-26 Engrossed Substitute House Bill Report — Reported by LG 02-20-26 Engrossed Substitute House Bill Report — Passed House 03-03-26 Final Bill Report — Final Bill Report 2026

Session law

Chapter 041, Laws of 2026