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California ADU law index

Every California ADU and housing bill, in one place.

A running index of the Senate and Assembly bills that decide what a California lot can hold: ADU statutes, SB 1211, JADU rules, the 2026 process reforms, and the pathways coming to Parcy next. Updated as bills take effect.

Updated October 2026Maintained by the Parcy development team

ADU statutesGov. Code § 66310 et seq.
The state ADU law, renumbered from § 65852.2 in 2024. One ADU and one JADU by right on single-family lots; 800 sq ft exemption; 4 ft setbacks; 60-day ministerial approval; no owner-occupancy.
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In Parcy now
SB 12112024 · effective Jan 1, 2025
Up to eight detached ADUs on multifamily lots (one per existing unit), converted-space ADUs up to 25% of existing units, and no replacement parking for removed uncovered spaces.
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In Parcy now
JADU rulesGov. Code § 66333 et seq.
Junior ADUs up to 500 sq ft inside the home, efficiency kitchen, shared bathroom allowed. AB 1154 (2026) limits owner-occupancy to shared-bath JADUs.
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In Parcy now
SB 5432025 · effective Jan 1, 2026
15-business-day completeness review with a deemed-complete rule, 800 sq ft measured as interior space, school fee exemption for units under 500 sq ft.
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In Parcy now
AB 11542025 · effective Jan 1, 2026
JADU owner-occupancy required only when the JADU shares a bathroom with the primary home.
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In Parcy now
AB 4622025 · effective Oct 15, 2025
60-day coastal development permits for ADUs in the Coastal Zone; detached ADU occupancy before the main home is rebuilt in disaster counties.
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In Parcy now
AB 9762023 · effective Jan 1, 2025
Permanently prohibits owner-occupancy requirements for ADUs.
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In Parcy now
AB 13322023 · effective Jan 1, 2025
Requires every city and county to publish pre-approved ADU plans and act on applications using them within 30 days.
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In Parcy now
AB 20972022
No minimum parking requirements for residential projects, ADUs included, within a half mile of major transit.
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In Parcy now
AB 25332024 · effective Jan 1, 2025
Amnesty path to legalize ADUs and JADUs built before Jan 1, 2020; cities may deny only on health and safety grounds; fees waived.
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In Parcy now
AB 10332023
Cities may allow ADUs to be sold separately from the main home as condominiums.
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In Parcy now
SB 13 / AB 68 / AB 8812019 · effective Jan 1, 2020
The 2020 ADU reform package: 60-day approvals, impact fee exemption under 750 sq ft, 4 ft setbacks, 800 sq ft exemption, two ADUs on multifamily lots, five-year owner-occupancy moratorium.
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In Parcy now
SB 897 / AB 22212022
Raised ADU height limits to 18 ft near transit and on multifamily lots, 25 ft for attached ADUs; front setbacks cannot block the 800 sq ft unit; detached ADU allowed with a proposed home.
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In Parcy now
SB 92021
Urban lot splits and duplexes on single-family lots, ministerially. Up to four homes where one stood.
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Coming to Parcy
SB 6842023 · effective Jul 1, 2024
Ministerial small-lot subdivisions of up to ten homes on multifamily-zoned lots under five acres.
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Coming to Parcy
SB 11232024 · effective Jul 1, 2025
Extends SB 684 to vacant single-family lots.
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Coming to Parcy
SB 792025 · effective Jul 1, 2026
Transit-oriented upzoning: state-set heights and densities within a half mile of major transit stops in the largest counties.
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Coming to Parcy
AB 130 / SB 1312025
CEQA exemption for qualifying infill housing projects, with SB 158 setting a 30-day final action deadline and a four-acre threshold.
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Coming to Parcy
Density Bonus LawGov. Code § 65915
Extra units, height, and reduced parking in exchange for affordable set-asides; the basis for Los Angeles ED1 100% affordable projects.
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Coming to Parcy

This index is informational and summarizes state law as we read it. Local ordinances add standards on top. Verify with your city's planning department and a licensed architect before relying on any provision.