---
type: "Bill"
title: "Increasing the availability of housing for developmentally disabled persons."
description: "Increasing the availability of housing for developmentally disabled persons."
jurisdiction: "us/states/wa"
legislature: "Washington Legislature"
session: "2017-2018"
identifier: "HB 2448"
citation: "Washington HB 2448 (2017-2018)"
classification: ["bill"]
subjects: ["PUBLIC FUNDS AND ACCOUNTS", "HOMES AND HOUSING", "TAX PREFERENCES - EXEMPTIONS", "CREDITS", "DEDUCTIONS", "DEFERRALS", "ETC.", "NONPROFIT ORGANIZATIONS", "DEVELOPMENTAL DISABILITIES", "INDIVIDUALS WITH"]
status: "enacted"
primary_sponsors: ["Senn"]
version_count: 2
action_count: 29
vote_count: 3
first_action: "2018-01-09"
last_action: "2018-03-22"
source: "openstates"
source_identifier: "ocd-bill/fa7d2de3-4e08-4286-a42c-182468d69dad"
source_url: "http://apps.leg.wa.gov/billinfo/summary.aspx?bill=2448&year=2017"
source_hash: "cac1312c9022a37cab547ee2fae6057241de11ce6499ab8e336459f49aa11804"
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 2448 (2017-2018) — Increasing the availability of housing for developmentally disabled persons.

## 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/2017-18/Htm/Bills/House%20Bills/2448.htm)
2. **Substitute Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2017-18/Htm/Bills/House%20Bills/2448-S.htm)

## Votes

- Final Passage (#5) — **94–0** (pass) · lower
- Final Passage as Amended by the Senate (#6) — **48–0** (pass) · upper
- Final Passage as Amended by the Senate (#4) — **98–0** (pass) · lower

## Sponsors

- Senn — primary (person)
- Appleton — cosponsor (person)
- Chapman — cosponsor (person)
- Kilduff — cosponsor (person)
- Kloba — cosponsor (person)
- Macri — cosponsor (person)
- Pollet — cosponsor (person)
- Robinson — cosponsor (person)
- Santos — cosponsor (person)
- Tarleton — cosponsor (person)
- Tharinger — cosponsor (person)

## Timeline

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

- **2018-01-09** First reading, referred to Finance (Not Officially read and referred until adoption of Introduction report). `reading-1`
- **2018-01-19** FIN - Majority; 1st substitute bill be substituted, do pass. `passage`
- **2018-01-24** Referred to Rules 2 Review.
- **2018-01-26** Placed on second reading by Rules Committee.
- **2018-02-01** 1st substitute bill substituted. `substitution`
- **2018-01-19** FIN - Majority; 1st substitute bill be substituted, do pass. `passage`
- **2018-01-24** Referred to Rules 2 Review.
- **2018-01-26** Placed on second reading by Rules Committee.
- **2018-02-01** 1st substitute bill substituted. `substitution`
- **2018-02-01** Rules suspended. Placed on Third Reading.
- **2018-02-01** Third reading, passed; yeas, 94; nays, 0; absent, 0; excused, 4. `reading-3`
- **2018-02-05** First reading, referred to Human Services & Corrections. `reading-1`
- **2018-02-19** HSC - Majority; without recommendation.
- **2018-02-19** And refer to Ways & Means. `referral-committee`
- **2018-02-20** Referred to Ways & Means.
- **2018-02-26** WM - Majority; do pass with amendment(s) by Ways & Means.
- **2018-02-26** Passed to Rules Committee for second reading.
- **2018-03-06** Placed on second reading by Rules Committee.
- **2018-03-07** Committee amendment(s) adopted with no other amendments.
- **2018-03-07** Rules suspended. Placed on Third Reading.
- **2018-03-07** Third reading, passed; yeas, 48; nays, 0; absent, 0; excused, 1. `reading-3`
- **2018-03-08** House concurred in Senate amendments.
- **2018-03-08** Passed final passage; yeas, 98; nays, 0; absent, 0; excused, 0. `passage`
- **2018-03-08** Speaker signed. `passage`
- **2018-03-08** President signed. `passage`
- **2018-03-08** Delivered to Governor.
- **2018-03-22** Governor signed. `executive-signature`
- **2018-03-22** Chapter 223, 2018 Laws. `became-law`
- **2018-03-22** Effective date 6/7/2018. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/fa7d2de3-4e08-4286-a42c-182468d69dad`. Confidence: reported (aggregated from official Washington legislature records).