Mandatory Housing Affordability (MHA) Zones
type: Dataset
description: 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.
issued: 2020-01-05
modified: 2022-06-23
spatial: Location
contact point: Organization
  fn: Planning_SeattleCityGIS
keyword: amerigeo
keyword: amerigeoss
keyword: ckan
keyword: geo
keyword: geoss
keyword: land-use
keyword: mha
keyword: national
keyword: north-america
keyword: planning
keyword: sdcizoningmap
keyword: united-states
keyword: zoning
theme: {geospatial}

ArcGIS GeoService
type: Distribution
format: JSON
issued: 2022-04-28T05:10:30.240957
modified: 2025-11-21T20:20:51.983113
access URL: https://services.arcgis.com/ZOyb2t4B0UYuYNYH/arcgis/rest/services/Mandatory_Housing_Affordability_Zoning/FeatureServer/0
media type: application/json

KML
type: Distribution
format: KML
issued: 2022-04-28T05:10:30.240965
modified: 2025-11-21T20:20:51.984354
access URL: https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::mandatory-housing-affordability-mha-zones.kml
media type: application/vnd.google-earth.kml+xml

GeoJSON
type: Distribution
issued: 2022-04-28T05:10:30.240960
modified: 2025-11-21T20:20:51.983512
access URL: https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::mandatory-housing-affordability-mha-zones.geojson
media type: application/vnd.geo+json

Shapefile
type: Distribution
format: ZIP
issued: 2022-04-28T05:10:30.240968
modified: 2025-11-21T20:20:51.984758
access URL: https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::mandatory-housing-affordability-mha-zones.zip
media type: application/zip

CSV
type: Distribution
format: CSV
issued: 2022-04-28T05:10:30.240963
modified: 2025-11-21T20:20:51.983905
access URL: https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::mandatory-housing-affordability-mha-zones.csv
media type: text/csv

ArcGIS Hub Dataset
type: Distribution
format: HTML
issued: 2022-04-28T05:10:30.240949
modified: 2025-11-21T20:20:51.982684
access URL: https://data-seattlecitygis.opendata.arcgis.com/maps/SeattleCityGIS::mandatory-housing-affordability-mha-zones
media type: text/html

US Migrating
type: Agent