StatisticsLegal timeline
Legal timeline
53 state-legislature bills whose titles explicitly reference accessory dwelling units, spanning 17 states. Sourced from OpenStates.
2026
- Pennsylvania SB 1256 — An Act amending the act of July 31, 1968 (P.L.805, No.247), known as the Pennsylvania Municipalities Planning Code, in general provisions, further providing for definitions; and, in zoning, providing for accessory dwelling units and for public availability of public utility fees. (2026-04-06T04:00:00+00:00)
- Connecticut HB 5507 — AN ACT PROMOTING THE DEVELOPMENT OF ACCESSORY DWELLING UNITS. (2026-03-05)
- Idaho S 1354 — ACCESSORY DWELLING UNITS – Amends and adds to existing law to revise provisions regarding prohibitions against restrictive covenants banning accessory dwelling units and to establish provisions regarding accessory dwelling units in the Local Land Use Planning Act. (2026-03-02)
- Michigan HB 5585 — Land use: zoning and growth management; zoning restrictions related to accessory dwelling units and mobile homes; modify. Amends sec. 102 of 2006 PA 110 (MCL 125.3102) & adds secs. 207a & 516. (2026-02-24)
- California SB 1196 — Accessory dwelling units and junior accessory dwelling units: utility service connections. (2026-02-19)
- California AB 2127 — Accessory dwelling units: private sewage disposal systems. (2026-02-18)
- Iowa SF 2369 — A bill for an act relating to county and city regulation of accessory dwelling units. (2026-02-18)
- Illinois HB 5626 — MUNI CD-ACCESSORY DWELLINGS (2026-02-18)
- California SB 1117 — Accessory dwelling units and junior accessory dwelling units. (2026-02-17)
- California SB 1122 — Planning and zoning: annual progress report: accessory dwelling unit ordinances. (2026-02-17)
- Pennsylvania HB 2186 — An Act amending Title 53 (Municipalities Generally) of the Pennsylvania Consolidated Statutes, providing for accessory dwelling units. (2026-02-02T05:00:00+00:00)
- Iowa HF 2252 — A bill for an act relating to county and city regulation of accessory dwelling units. (2026-01-30)
- Maine LD 2173 — An Act To Update The Laws Regarding Housing Developments And Accessory Dwelling Units (2026-01-27)
- Tennessee SB 2131 — Housing - As introduced, provides for the regulation of accessory dwelling units. - Amends TCA Title 5; Title 6; Title 7; Title 13; Title 66 and Title 68. (2026-01-23)
- Iowa HSB 618 — A bill for an act relating to county and city regulation of accessory dwelling units. (2026-01-22)
- Tennessee HB 2031 — Housing - As introduced, provides for the regulation of accessory dwelling units. - Amends TCA Title 5; Title 6; Title 7; Title 13; Title 66 and Title 68. (2026-01-22)
- New Jersey A 3567 — Concerns development of accessory dwelling units and related municipal land use regulations. (2026-01-13T05:00:00+00:00)
- New Jersey S 1786 — Concerns development of accessory dwelling units and related regulations. (2026-01-13T05:00:00+00:00)
- New Jersey S 2680 — Concerns development and use of accessory dwelling units. (2026-01-13T05:00:00+00:00)
- Virginia SB 531 — Zoning; development and use of accessory dwelling units, delayed effective date. (2026-01-13)
2025
- New Hampshire HB 1662 — relative to providing loan guarantees for accessory dwelling unit financing. (2025-12-12)
- New Hampshire HB 1625 — relative to annual reporting on accessory dwelling unit construction and use. (2025-12-10)
- New Hampshire HB 1540 — relative to municipal health ordinances and accessory dwelling units. (2025-12-10)
- New Hampshire HB 1079 — allowing accessory dwelling units to be built within or attached to certain non-conforming structures. (2025-12-01)
- New Hampshire HB 1136 — relative to accessory dwelling units. (2025-12-01)
- New Hampshire HB 1006 — relative to on-site parking requirements for accessory dwelling units. (2025-11-07)
- New Hampshire HB 1012 — repealing accessory dwelling units and detached accessory dwelling units. (2025-11-07)
- New Hampshire HB 1017 — relative to accessory dwelling units and workforce housing. (2025-11-07)
- Massachusetts H 4163 — An Act relative to accessory dwelling units inclusion in the subsidized housing inventory (2025-05-29)
- Wisconsin SB 247 — Relating to: local and private regulation of accessory dwelling units. (FE) (2025-05-09T05:00:00+00:00)
- Maine LD 1272 — An Act To Address The Housing Crisis By Reducing Barriers To Building More Accessory Dwelling Units (2025-03-25)
- Iowa HF 947 — A bill for an act relating to county and city regulation of accessory dwelling units. (2025-03-12)
- Iowa SSB 1182 — A bill for an act relating to county and city regulation of accessory dwelling units. (2025-02-25)
- California SB 543 — Accessory dwelling units and junior accessory dwelling units. (2025-02-20)
- Iowa HSB 162 — A bill for an act relating to county and city regulation of accessory dwelling units. (2025-02-12)
- Washington SB 5529 — Amending the county population threshold for counties that may exempt from taxation the value of accessory dwelling units to incentivize rental to low-income households. (2025-01-27)
- Washington HB 1345 — Establishing limitations on detached accessory dwelling units outside of urban growth areas. (2025-01-16)
2024
- South Carolina H 3469 — Accessory Dwelling Unit Affordable Housing Incentive Act (2024-12-05)
- South Carolina H 5372 — Accessory Dwelling Unit Affordable Housing Incentive Act (2024-04-09)
- California SB 1211 — Land use: accessory dwelling units: ministerial approval. (2024-02-15)
- California AB 2825 — Accessory dwelling units: inspections: housing purposes. (2024-02-15)
- New Jersey S 2347 — Concerns development of accessory dwelling units and related regulations.* (2024-01-29T05:00:00+00:00)
- New Jersey S 1106 — Concerns development and use of accessory dwelling units. (2024-01-09T05:00:00+00:00)
- Virginia HB 900 — Zoning; developmental and use of accessory dwelling units. (2024-01-09)
- Washington SB 6030 — Amending the county population threshold for counties that may exempt from taxation the value of accessory dwelling units to incentivize rental to low-income households. (2024-01-05)
2023
- Rhode Island SB 1036 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Amends several sections of law relating to zoning ordinances to provide uniform zoning standards for accessory dwelling units.) (2023-05-19)
- Rhode Island SB 1006 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Amends several sections of law relating to zoning ordinances to provide uniform zoning standards for accessory dwelling units.) (2023-05-15)
- Rhode Island HB 6082 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Amends several sections of law relating to zoning ordinances to provide uniform zoning standards for accessory dwelling units.) (2023-03-03)
- Rhode Island SB 164 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Prohibits the offering or renting of accessory dwelling units for tourist or transient use or through a hosting platform, and enables municipalities to fine property owners and hosting platforms a fine not to exceed five hundred dollars ($500).) (2023-02-16)
- Rhode Island HB 5599 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Prohibits the offering or renting of accessory dwelling units for tourist or transient use or through a hosting platform, and enables municipalities to fine property owners and hosting platforms a fine not to exceed five hundred dollars ($500).) (2023-02-15)
- Virginia HB 2100 — Accessory dwelling units; establishes authority & requirements for localities in development & use. (2023-01-10)
2022
- Rhode Island SB 2623 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Eliminates the restrictions on accessory dwelling units and allows for accessory apartments and affordable accessory apartments as a matter of right.) (2022-03-10)
- Rhode Island HB 7942 — AN ACT RELATING TO TOWNS AND CITIES -- ZONING ORDINANCES (Revise and clarifies the definition of an accessory dwelling unit in the zoning enabling act. Also permits certain accessory dwelling units to be counted towards low and moderate income housing requirements.) (2022-03-07)