HB1711– Allows cities and counties to waive or defer ADU fees; defer taxes; and waive regulations for them, provided that they can’t be used as short-term rentals.
Prime Sponsor – Representative Pollet (D; 46th District; Northeast Seattle) (Co-Sponsor Representative Shewmake -D)
Current status – Passed out of committee and referred to Rules January 21st; still there at cutoff.
Next step would be – Dead bill.
Legislative tracking page for the bill.

In the House –
Had a hearing in the House Committee on Local Government January 12th.

Summary –
The bill would allow cities and counties to waive or defer fees for ADUs, including impact fees; defer the payment of taxes on them; or waive specific regulations for them. However, it would only allow these or other local incentives for the development or construction of ADUs if they were subject to binding commitments or covenants preventing their regular use as short-term rentals, and the jurisdiction had a program to audit compliance with those.

(It also removes the current definition of an ADU’s owner as someone with at at least a 50% interest in the property it’s on, and fixes the phrasing about route frequency in the definition of a major transit stop.)