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Summary: A developer contribution is payment or provision of a benefit in consideration of a proposed project. The City of Seattle requires developer contributions in certain instances to achieve extra floor area and/or mitigate the impacts of new development. Developer contributions may address local needs for affordable housing, childcare, open space, historic preservation, and preservation of regional farms and forests. Developer contributions are generally required through incentive zoning (IZ), Mandatory Housing Afford-ability (MHA) requirements, or both.

Date Revised: 04/19/2018

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