PLEASE NOTE: If choosing the Download option of "Spreadsheet" the field PIN is reformatted to a number - you will need to format it as a 10 character text string with leading zeros to join this data with data from King County.

King County Assessor data has been summarized to the tax parcel identification number (PIN) and City of Seattle spatial overlay data has been assigned through geographic overlay processes.  This data is updated periodically and is used to support the analytical and reporting functions of the City of Seattle long-range and policy planning office.

The table includes attribute data from the King County Assessor as well as spatial overlay data for various City of Seattle reporting geographies.  These geographic attributes are assigned as "majority rules" by land area in cases where multiple geographies span a single tax parcel.

KCA tax parcels are created by King County for property tax assessment and collection and may not match development sites as defined by the City of Seattle (single buildings may span multiple tax parcels), may be stacked on top of each other to represent undivided interest and vertical parcels, or may be made up of several sites that are not contiguous.  Every effort is made to accurately summarize key tax parcel attributes to a single PIN.  

Attributes include parcel centroid locations in latitude/longitude and Washington State Plane X,Y.  To get polygon representation of the data please see King County's open data page for parcels and join this table through the PIN field.  Please be aware that the King County Assessor site address is not a postal address and may not match other address sources for the same property such as postal, utility billing, and permitting.

See the detailed data dictionary for more information.

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

A polygon feature class showing current City of Seattle land use zoning areas. It provides information on the type of zoning, overlay districts, enacting ordinance numbers and effective dates.

Zoning Code governs the use and development of land in Seattle. Zoning districts specify a category of uses (e.g., single-family residential, multifamily residential, commercial, industrial, etc.) including specific overlays and are applied by ordinance. 

Symbolized on the value DETAIL_DESC (group 28 categories).

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

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

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

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

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

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

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.  

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

Assumptions include floor-area-ratio, residential density, split between residential and commercial floor area in mixed use zones, redevelopment ratio thresholds and conversions between floor area and housing units and jobs.

Supporting Resources:

Complete Data Dictionary

This layer is the output of the City of Seattle Zoned Development Capacity Model. To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning. The difference between potential and existing development yields the capacity for new development measured as the number of housing units and the number of potential jobs that could be added.

Knowledge about capacity enables the City to determine the effects of proposed zoning changes, policy revisions and development trends.  It also aids in setting and allocating the 20-year growth targets that must be accommodated by the City’s Comprehensive Plan.  

The model is based on development sites and land use zoning maintained by the Department of Construction and Inspections.  Model results for any given development site are not a prediction that a certain amount of development will occur in some fixed time period. 

The actual level of development activity that occurs is a function of a variety of future factors, many of which are beyond our ability to predict or influence.  These factors include such things as the future demand for a particular type of development (such as for townhouses, high-amenity multifamily or small-unit multifamily), whether the owner of any particular land is willing to sell or redevelop it, the financial feasibility of developing the land, and the intensity of development when it does occur.  Other factors, such as the relative attractiveness of certain areas for living and commerce, and the relative densities allowed by the existing zoning, can cause some areas to be developed earlier or later than others.  No one can predict with certainty the total effect of all these factors on the choices made by land developers.

See the data in action in this web app.

Supporting resources:

Model Methodology

Complete Data Dictionary

Disclaimer: This map is the product of an analytical model.  The model

Land use zoning simplified to zoning and shoreline overlay polygons with development assumptions by zoning category.

Assumptions include floor-area-ratio, residential density, split between residential and commercial floor area in mixed use zones, redevelopment ratio thresholds and conversions between floor area and housing units and jobs.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.

These layers are used as part of the City of Seattle Zoned Development Capacity Model 2016. Includes all input and output layers..

To estimate potential development, the City of Seattle maintains a zoned development capacity model that compares existing development to an estimate of what could be built under current zoning.

The difference between existing and potential development yields the capacity for new residential and commercial development.

There is a report of summary findings available as part of Seattle 2035 as well as resources for reports, methodologies and data.

When downloading the data, please select a layer and then "GDB Download" under "Additional Resources" to preserve long field names.  The associated file geodatabase contains all the feature classes for the 10 layers represented.