Every county must allow two ADUs by December 31 — and new covenants cannot stop them
Every county must allow two ADUs by December 31 — and new covenants cannot stop them
2026-09-10 · Hawaii · Compliance
Hawaii’s counties have until December 31, 2026 to allow at least two accessory dwelling units on residentially zoned urban lots — and a private covenant recorded after May 28, 2024 cannot stand in the way.1
Act 39 (2024), from SB 3202, was signed May 28, 2024. Its Part I adds a section to HRS ch. 46 directing counties; Section 2 adds a section to HRS ch. 205 directing covenants.
The preemption clause, verbatim
“No private covenant for a residentially zoned lot within an urban district recorded after the effective date of this Act shall limit the: (1) Number of accessory dwelling units on that residentially zoned lot below the amount allowed pursuant to section 46- ; or (2) Long-term rental of residential units on that residentially zoned lot.”
And immediately after it, the line that decides most Hawaii associations’ position:
“This section shall not apply to any private covenants recorded before the effective date of this Act.”
What is inside and outside
“Residentially zoned lot” means a zoning lot principally reserved for single-family and two-family detached dwellings. It excludes lots zoned for rural, low-density residential development and open space preservation.
The mandate does not apply outside the ch. 205 urban district, to county powers in ch. 205A special management areas, or to areas a county deems at high risk of natural hazard — flooding, lava, fire — per current federal or state maps.
Subsection (j) adds that nothing in the section or any permit issued under it creates vested rights, and that it does not preempt a county’s ability to accept, review, approve and deny permit applications.
The date that decides your association's position
May 28, 2024. Covenants recorded before it keep their ADU and long-term-rental restrictions. Covenants recorded after it do not, on qualifying lots.
Which raises the question every Hawaii planned community should ask before its next document project: what happens when we amend and re-record?
The statute grandfathers “private covenants recorded before the effective date.” It does not say what becomes of a restated declaration recorded in 2027 that carries forward a 1998 restriction. There is a reading on which the restriction survives as a pre-Act covenant merely restated, and a reading on which the operative recorded instrument is the 2027 one. We are not aware of Hawaii authority resolving it.
That is an unresolved point, and it is an expensive one to be wrong about. A community contemplating a restatement should get counsel on it first — and, if the ADU and rental restrictions matter, should consider whether a full restatement is worth the risk it creates.
Who this actually reaches
Mostly planned community associations under HRS ch. 421J, not condominiums. The statute’s reach is single-family and two-family detached zoning inside the urban district, which is where subdivision-style communities sit. Most multifamily condominium projects are outside it entirely.
That matters because ch. 421J is the thinner statute. It has no reserve requirement, no insurance mandate, no state registration, and no fining statute — and its document-restriction powers come almost entirely from the recorded declaration. A preemption aimed at recorded covenants lands hardest on the association type whose only real authority is recorded covenants.
The county layer, and the deadline
December 31, 2026 is the compliance deadline for every county. Honolulu’s implementation is reported as Ordinance 25-2, which reportedly relaxes the previous 3,500-square-foot minimum lot rule, allows an ADU up to 500 square feet on lots under 5,000 square feet and up to 1,000 square feet on lots of 5,000 square feet or more, permits an ADU where an ohana unit or two principal dwellings already exist, and drops the owner-occupancy covenant while retaining long-term-rental, no-short-term-rental and no-condominium-property-regime covenants. We could not verify those details against the City’s own pages, so confirm before relying on them.
The county ordinance is what sets the number the covenant may not go below. So the two documents have to be read together: the county sets the floor, and the covenant cannot dip under it on a qualifying lot.
What a board can do this quarter
- Find the recordation date of your operative declaration and every amendment. Before or after May 28, 2024 is the first question and it has a documentary answer.
- Check whether your lots are in the ch. 205 urban district and zoned for single-family or two-family detached dwellings. If not, the statute does not reach you.
- Check the hazard and SMA carve-outs. A community in a mapped high-hazard area or a special management area may be outside the mandate even if everything else fits.
- Do not amend the ADU or rental provisions without counsel — the restatement question above is live.
- Separate ADU restrictions from short-term-rental restrictions in your documents. Act 39 preempts limits on long-term rental. Short-term rental restrictions are untouched, and a covenant that lumps them together is harder to defend than one that treats them separately.
What to watch
County ordinances landing before the December 31 deadline, and the first Hawaii dispute over whether a restated covenant is a pre-Act or post-Act covenant. That case will decide more for Hawaii planned communities than the statute’s text does.
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