Bill > HB1840

This bill authorizes counties planning under the Growth Management Act to allow middle housing (such as duplexes, triplexes, and fourplexes) in certain designated areas, including urban growth areas, limited areas of more intensive rural development, and fully contained communities. Specifically, counties may now require at least one middle housing unit on each parcel that currently permits single-family residences. In limited areas of more intensive rural development, counties cannot authorize more than four residential units per lot and must ensure that middle housing is subject to the same development standards and permit processes as detached single-family homes, with the additional requirement that these units be connected to sewer service. The bill also prevents administrative or judicial appeals challenging county ordinances and development regulations that implement these middle housing provisions. This legislation aims to increase housing density and provide more diverse housing options in areas previously restricted to single-family homes, potentially addressing housing affordability and availability challenges by allowing more compact residential development.

Housing and Urban Affairs

https://app.leg.wa.gov/billsummary?BillNumber=1840&Year=2025&Initiative=false