About this Dataset

Mandatory Housing Affordability (MHA) Zones

Note: This map is not an official zoning map. For precise zoning information, please call or visit the Seattle Municipal Tower, Seattle Department of Construction and Inspections

Zoning areas where Mandatory Housing Affordability requirements may apply.

Mandatory Housing Affordability requires new development to contribute to affordable housing by including affordable housing in the development or making a payment to the City’s Office of Housing to support affordable housing. The amount of the MHA contribution varies based on a property’s location and other factors specified in Seattle Municipal Code Chapters 23.58B and 23.58C.
Organization: City of Seattle
Last updated: 2025-02-28T23:20:39.719862
Tags: gis, land-use, mha, planning, sdcizoningmap, seattle-gis-open-data, zoning

Tables

Table 1

@usgov.city_of_seattle_mandatory_housing_affordability_mha_zones_53917.table_1

198.32 kB
2,796 rows
39 columns

CREATE TABLE table_1 (
  "objectid" BIGINT,
  "zoneid" BIGINT,
  "zone" VARCHAR,
  "contract_rezone_number" VARCHAR,
  "ordinance_number" BIGINT,
  "effective_date" VARCHAR,
  "historic_district_overlay" VARCHAR,
  "pedestrian_overlay" VARCHAR,
  "shoreline_overlay" VARCHAR,
  "other_district_overlay" VARCHAR,
  "station_area_overlay" VARCHAR,
  "mandatory_housing_affordability_apply_y_n" VARCHAR  -- Mandatory Housing Affordability Apply (Y/N),
  "incentive_zoning_apply_y_n" VARCHAR  -- Incentive Zoning Apply (Y/N),
  "mandatory_housing_affordability_tier" VARCHAR,
  "se_anno_cad_data" VARCHAR,
  "major_institution_name" VARCHAR,
  "class" VARCHAR,
  "category" VARCHAR,
  "detail_code" VARCHAR,
  "detail" VARCHAR,
  "group" VARCHAR,
  "zoning_description" VARCHAR,
  "base_zone" VARCHAR,
  "previous_zone" VARCHAR,
  "previous_contract_rezone_number" VARCHAR,
  "previous_ordinance_number" DOUBLE,
  "previous_effective_date" VARCHAR,
  "previous_historic_district_overlay" VARCHAR,
  "previous_pedestrian_overlay" VARCHAR,
  "previous_shoreline_overlay" VARCHAR,
  "previous_other_district_overlay" VARCHAR,
  "previous_station_area_overlay" VARCHAR,
  "next_previous_zoneid" DOUBLE,
  "class_description_popup" VARCHAR,
  "land_use_code_chapter" VARCHAR,
  "land_use_code_chapter_link" VARCHAR,
  "zoning_history" VARCHAR,
  "shape_area" DOUBLE  -- Shape, Area,
  "shape_length" DOUBLE  -- Shape, Length
);