Mandatory Housing Affordability

Mandatory Housing Affordability (MHA) ensures that new commercial and multifamily residential development contributes to affordable housing. This is done by requiring new developments to include affordable housing (performance option) or contribute to the Seattle Office of Housing fund to support the development of affordable housing (payment option).

MHA will provide rent-restricted, income-restricted homes for low-income people. This requirement is implemented by changing zoning to allow larger development and more housing. When developers and owners apply for new building permits, the Seattle Department of Construction and Inspection reviews each proposal to determine what MHA requirements the new development is subject to. Once these requirements are confirmed, the Office of Housing will review projects to coordinate with developers to comply with the MHA Program via the payment or performance option. Answers to frequently asked questions can be found on Tip 257.




Affirmative Marketing

  • Affirmative Marketing Information Sheet - This document provides an overview of affirmative marketing for properties in the MFTE and Mandatory Housing Affordability (MHA) programs. 
  • Letter of Intent to Implement Affirmative Marketing - This document indicates a property owner's commitment to implement Affirmative Marketing. The Letter of Intent must be submitted to the Office of Housing along with the MFTE application, prior to the issuance of the project's first building permit. MHA properties must submit this form prior to the issuance of the first building permit.
  • Special Outreach for Affirmative Marketing - Properties implementing Affirmative Marketing should use these forms to conact community-based organizations.
  • Community-based Organizations for Affirmative Marketing - Properties that are required to implement Affirmative Marketing Plans must choose three organizations to direct their special outreach to. This spreadsheet includes contact information for over 60 community based organizations around Seattle.
  • Affirmative Marketing Lease-Up and Supplemental Reports - Properties that are required to implement Affirmative Marketing Plans must demostrate compliance by completing these forms and submitting them to the Office of Housing.