# New Hampshire HB577: relative to modifying the definition of ADUs.

New Hampshire HB577, relative to modifying the definition of ADUs., is a 2025-2026 Regular Session House bill sponsored by Joe H. Alexander (Republican); status signed, last action 2025-07-22 (Signed by Governor Ayotte 07/15/2025; Chapter 197; eff. 07/01/2025 HJ 18); PRIA reads it as touching household money (as of 2026-10-17).

- Canonical: https://policyrisk.com/state-bill/NH-HB577-2025-2026
- As of: 2026-10-17
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: New Hampshire HB577
- State: New Hampshire
- Session: 2025-2026 Regular Session
- Title: relative to modifying the definition of ADUs.
- Status: signed
- Chamber: House
- Introduced: 2025-01-16
- Last action: 2025-07-22, Signed by Governor Ayotte 07/15/2025; Chapter 197; eff. 07/01/2025 HJ 18
- Sponsor: Joe H. Alexander (Republican)
- Cosponsors: 8
- Touches household money: yes
- Economic provisions PRIA read: 0

## Summary

No summary available.

## Bill overview

No economic impacts identified for this bill.

## Sponsors and cosponsors

- Sponsor: Joe H. Alexander (Republican), House
- Cosponsor: Alissandra Murray (Democratic), House
- Cosponsor: Dan McGuire (Republican), House
- Cosponsor: Hope E Damon (Democratic), House
- Cosponsor: Daniel E. Innis (Republican), Senate
- Cosponsor: Jessica Grill (Democratic), House
- Cosponsor: Joe Sweeney (Republican), House
- Cosponsor: Keith R. Murphy (Republican), Senate
- Cosponsor: Lisa R Mazur (Republican), House

## Actions (17)

- 2025-07-22: Signed by Governor Ayotte 07/15/2025; Chapter 197; eff. 07/01/2025 HJ 18 (House)
- 2025-07-02: Enrolled Adopted, VV, (In recess 06/26/2025); SJ 18 (Senate)
- 2025-07-02: Enrolled (in recess of) 06/26/2025 HJ 18 P. 59 (House)
- 2025-06-27: Enrolled Bill Amendment # 2025-2874e: AA VV (in recess of) 06/26/2025 HJ 18 P. 57 (House)
- 2025-06-27: Enrolled Bill Amendment # 2025-2874e Adopted, VV, (In recess of 06/26/2025); SJ 18 (Senate)
- 2025-05-15: Ought to Pass: MA, VV; OT3rdg; 05/15/2025; SJ 13 (Senate)
- 2025-05-15: Sen. Fenton Floor Amendment # 2025-2162s, AF, VV; 05/15/2025; SJ 13 (Senate)
- 2025-05-13: Committee Report: Ought to Pass, 05/15/2025, Vote 5-1; SC 21A (Senate)
- 2025-03-18: Hearing: 03/25/2025, Room 100, SH, 10:45 am; SC 14 (Senate)
- 2025-03-11: Introduced 03/06/2025 and Referred to Commerce; SJ 7 (Senate)
- 2025-03-06: Ought to Pass with Amendment 2025-0449h: MA VV 03/06/2025 HJ 7 P. 15 (House)
- 2025-03-06: Amendment # 2025-0449h: AA VV 03/06/2025 HJ 7 P. 15 (House)
- 2025-02-26: Committee Report: Ought to Pass with Amendment # 2025-0449h 02/18/2025 (Vote 18-0; CC) HC 14 P. 10 (House)
- 2025-02-26: Executive Session: 02/11/2025 10:00 am LOB 305 (House)
- 2025-02-05: Full Committee Work Session: 02/11/2025 10:00 am LOB 305 (House)
- 2025-01-29: Public Hearing: 02/04/2025 10:00 am LOB 305 (House)
- 2025-01-16: Introduced (in recess of) 01/09/2025 and referred to Housing HJ 3 P. 17 (House)

## Bill text

- As Amended, 2025-06-27: [PDF](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=10275)
- Enrolled, 2025-06-27: [HTML](https://gc.nh.gov/bill_status/billinfo.aspx?id=125&inflession=2025)
- Introduced, 2025-01-16: [PDF](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=6714)
- CHAPTERED FINAL VERSION: [PDF](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=16927)
- Version adopted by both bodies: [PDF](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=14531)

## Related bills

- HB2026: (New Title) relative to the state 10-year transportation improvement plan; relative to toll rate adjustments and periodic toll reviews for the New Hampshire tu… (became law)
- HB1002: repealing the solar energy systems tax exemption. (failed)
- HB1834: relative to the education freedom account enrollment cap. (failed)
- SB101: (Second New Title) authorizing parents to enroll their children in any public school in the state. (failed)
- CACR22: relating to the compensation of the legislature. Providing that the present compensation per elected term for legislators is hereby abolished. (failed)
- HB1786: relative to creating a state assessment on non-homestead luxury second homes to fund statewide housing development programs and address housing shortages and m… (failed)

## Sources
- [As Amended (PDF)](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=10275)
- [Enrolled (HTML)](https://gc.nh.gov/bill_status/billinfo.aspx?id=125&inflession=2025)
- [Introduced (PDF)](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=6714)
- [CHAPTERED FINAL VERSION (PDF)](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=16927)
- [Version adopted by both bodies (PDF)](https://gc.nh.gov/bill_status/pdf.aspx?q=billVersion&id=14531)

## Related
- [HB2026: (New Title) relative to the state 10-year transportation improvement plan; rela…](https://policyrisk.com/state-bill/NH-HB2026-2025-2026)
- [HB1002: repealing the solar energy systems tax exemption.](https://policyrisk.com/state-bill/NH-HB1002-2025-2026)
- [HB1834: relative to the education freedom account enrollment cap.](https://policyrisk.com/state-bill/NH-HB1834-2025-2026)
- [SB101: (Second New Title) authorizing parents to enroll their children in any public s…](https://policyrisk.com/state-bill/NH-SB101-2025-2026)
- [CACR22: relating to the compensation of the legislature. Providing that the present com…](https://policyrisk.com/state-bill/NH-CACR22-2025-2026)
- [HB1786: relative to creating a state assessment on non-homestead luxury second homes to…](https://policyrisk.com/state-bill/NH-HB1786-2025-2026)
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Source: PRIA, https://policyrisk.com/state-bill/NH-HB577-2025-2026 (as of 2026-10-17).