HB1660 – Modifying the State’s limits on local jurisdictions’ ADU requirements.
Prime Sponsor – Representative Shewmake (D; 42nd District; Whatcom County)
Current status – Had a hearing in the Senate Committee on Housing & Local Government Wednesday February 23rd. Amended to specify that jurisdictions issuing ADU permits aren’t liable if that violates various ownership associations’ existing restrictions on them. Passed out of committee February 23rd; referred to Rules.
Next step would be – Action by the Rules Committee.
Legislative tracking page for the bill.
SB5648 is a companion bill in the Senate.

In the House – Passed
Had a hearing in the House Committee on Local Government January 12th; replaced by a substitute January 21st. (The substitute would prohibit local jurisdictions from limiting ADUs in various additional ways; there’s a staff summary of the details at the beginning of the substitute.) Referred to Rules. Amended on the floor to prohibit condominium associations or associations of apartment owners from blocking the construction or use of an ADU and passed by the House February 14th.

Original bill –
The bill would extend the date by which cities and counties would have to adopt subsection (2) of RCW 36.70A.698 from July 1, 2021 to July 1, 2024. That subsection allows them to require off-street parking for an ADU within a quarter mile of a major transit stop if they determine that the ADU is in an area that lacks access to street parking capacity, has physical space impediments, or there are other reasons supported by evidence that would make on-street parking infeasible there. (If they changed their rules about ADUs after July 1, 2021, they would have until their next comprehensive plan update to make this additional change. The bill would make the subsection take effect after July 1, 2024 in any jurisdiction that hadn’t adopted the change by then, though.)

The bill would also prohibit cities and counties from requiring owner occupancy of the principal housing or dwelling unit on a lot with an ADU unless it were being offered or used for short-term rental.