Extra floor area in SM-U zones
Seattle Mun. Code § 23.48.622
in effectA. Means to achieve extra floor area above the base FAR, or above the additional increment of chargeable floor area allowed above the base FAR by subsection 23.48.620.B 1. General. The applicant shall: a. Achieve 65 percent of the extra floor area on the lot by using bonus residential floor area for affordable housing pursuant to Section 23.58A.014 or bonus non-residential floor area for affordable housing and child care pursuant to Section 23.58A.024 ; and b. Achieve 35 percent of the extra floor area through the use of one or more of the following options: 1) Acquiring open space, Landmark, or vulnerable masonry TDR or TDP according to Sections 23.48.623 and 23.58A.042 ; or 2) Providing open space amenities according to Sections 23.48.624 and 23.58A.040 . 2. Extra floor area in mixed-use projects. In a project that exceeds the base FAR, or exceeds the increment of additional chargeable floor area allowed above the base FAR under subsection 23.48.620.B, and that includes both residential and non-residential uses, the amount of extra residential floor area and extra non-residential floor area to be obtained shall be calculated as follows: a. Relative to the total chargeable gross floor area of all uses in the project, determine the percentage that is in residential use and the percentage that is in non-residential use. b. Determine the total amount of extra floor area in the project above the base FAR, or above the increment of additional chargeable floor area allowed above the base FAR under subsection 23.48.620.B, and, using the percentages derived in subsection 23.48.622.A.2.a, divide this total amount to determine the share of extra floor area that is to be obtained as extra residential floor area and the share that is to be obtained as extra non-residential floor area according to the applicable provisions of the zone. B. Green building performance. Applicants for development containing any extra floor area in SM-U zones shall make a commitment that the proposed development will meet the green building standard and shall demonstrate compliance with that commitment, all in accordance with Chapter 23.58D . (Ord. 126685 , § 31, 2022 [cross-reference update]; Ord. 125267 , § 26, 2017.)
Source: Seattle Municipal Code (Municode library)URL: https://library.municode.com/wa/seattle/codes/municipal_codeFetched: 7/25/2026