---
type: "Bill"
title: "Expanding the ability to build tiny houses."
description: "Expanding the ability to build tiny houses."
jurisdiction: "us/states/wa"
legislature: "Washington Legislature"
session: "2021-2022"
identifier: "HB 2001"
citation: "Washington HB 2001 (2021-2022)"
classification: ["bill"]
subjects: ["GROWTH MANAGEMENT", "HOMES AND HOUSING", "LOW-INCOME PERSONS"]
status: "enacted"
primary_sponsors: ["McCaslin"]
version_count: 2
action_count: 27
vote_count: 2
first_action: "2022-01-17T05:00:00+00:00"
last_action: "2022-03-31T04:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/04d031e3-8ad6-49a7-8f7d-c7d37d9e71d4"
source_url: "http://apps.leg.wa.gov/billinfo/summary.aspx?bill=2001&year=2021"
source_hash: "0f3d8ff9f92dedbe3b14981b878ff7986a395b746ff4e0934ac147684900ca77"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-wa"]
---

# Washington HB 2001 (2021-2022) — Expanding the ability to build tiny houses.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2021-22/Htm/Bills/House%20Bills/2001.htm)
2. **Substitute Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2021-22/Htm/Bills/House%20Bills/2001-S.htm)

## Votes

- 3rd Reading & Final Passage (#9) — **97–1** (pass) · lower
- 3rd Reading & Final Passage (#34) — **47–1** (pass) · upper

## Sponsors

- McCaslin — primary (person)
- Chase — cosponsor (person)
- Graham — cosponsor (person)
- Jacobsen — cosponsor (person)
- Sutherland — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2022-01-17T05:00:00+00:00** First reading, referred to Local Government. `reading-1`
- **2022-02-01T05:00:00+00:00** Public hearing in the House Committee on Local Government at 10:00 AM.
- **2022-02-02T05:00:00+00:00** Executive action taken in the House Committee on Local Government at 10:00 AM.
- **2022-02-02T05:00:00+00:00** LG - Majority; 1st substitute bill be substituted, do pass. `passage`
- **2022-02-03T05:00:00+00:00** Referred to Rules 2 Review. `referral-committee`
- **2022-02-07T05:00:00+00:00** Rules Committee relieved of further consideration. Placed on second reading. `reading-2`
- **2022-02-11T05:00:00+00:00** 1st substitute bill substituted (LG 22). `substitution`
- **2022-02-11T05:00:00+00:00** Rules suspended. Placed on Third Reading. `reading-3`
- **2022-02-11T05:00:00+00:00** Third reading, passed; yeas, 97; nays, 1; absent, 0; excused, 0. `reading-3`
- **2022-02-14T05:00:00+00:00** First reading, referred to Housing & Local Government. `reading-1`
- **2022-02-17T05:00:00+00:00** Public hearing in the Senate Committee on Housing & Local Government at 8:00 AM.
- **2022-02-24T05:00:00+00:00** Executive action taken in the Senate Committee on Housing & Local Government at 8:00 AM.
- **2022-02-24T05:00:00+00:00** HLG - Majority; do pass. `committee-passage-favorable`
- **2022-02-24T05:00:00+00:00** Passed to Rules Committee for second reading.
- **2022-03-01T05:00:00+00:00** Placed on second reading by Rules Committee. `reading-2`
- **2022-03-03T05:00:00+00:00** Rules suspended. Placed on Third Reading. `reading-3`
- **2022-03-03T05:00:00+00:00** Third reading, passed; yeas, 47; nays, 1; absent, 0; excused, 1. `reading-3`
- **2022-03-07T05:00:00+00:00** Speaker signed. `passage`
- **2022-03-08T05:00:00+00:00** President signed. `passage`
- **2022-03-10T05:00:00+00:00** Delivered to Governor. `executive-receipt`
- **2022-03-31T04:00:00+00:00** Governor signed. `executive-signature`
- **2022-03-31T04:00:00+00:00** Chapter 275, 2022 Laws. `became-law`
- **2022-03-31T04:00:00+00:00** Effective date 6/9/2022. `became-law`
- **2022-02-01T15:00:00+00:00** Scheduled for public hearing in the House Committee on Local Government at 10:00 AM
- **2022-02-02T15:00:00+00:00** Scheduled for public hearing in the House Committee on Local Government at 10:00 AM
- **2022-02-17T13:00:00+00:00** Scheduled for public hearing in the Senate Committee on Housing & Local Government at 08:00 AM
- **2022-02-24T13:00:00+00:00** Scheduled for public hearing in the Senate Committee on Housing & Local Government at 08:00 AM

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/04d031e3-8ad6-49a7-8f7d-c7d37d9e71d4`. Confidence: reported (aggregated from official Washington legislature records).