The Seattle City Council made a significant move on March 18, 2019, by unanimously passing legislation to implement Mandatory Housing Affordability (MHA) citywide, a vital step in addressing the city's housing crisis. The MHA program allows for increased building heights and density in exchange for commitments from developers to provide affordable housing for middle-income residents. The legislation comprises several council bills that amend both the Comprehensive Plan and the Land Use Code, affecting zoning across various neighborhoods. Notably, proposed changes in the University District were set aside for additional technical work to ensure thorough consideration. The Select Committee on Citywide MHA, made up of all nine council members, will guide the implementation process, emphasizing the importance of public participation and community feedback.

An extensive public engagement strategy is in place, including public hearings and open houses, to foster transparency and collaboration with residents. As urban villages and multifamily zones expand, this legislation aims to create a balanced approach to development while addressing the urgent need for affordable housing. The City Council’s proactive measures reflect a commitment to sustainable urban growth and community well-being.