Data Sources

Tab	Data	Source/ Steward	Update Frequency	Link to data
Assessment	Appraised Values	DOA	Weekly*	Download Data
* Values generally change during posting, April - August. Values are static during the year but may change as the result of an appeal or other action.
Assessment	Property Type	DOA	Weekly
General Use Classification.
MyProperty	Address Search	DOA	Weekly	Download Data
Addresses are stored in multiple tables.. See Apartment Complex, Commercial Building , Residential Building, Vacant Lot.
MyProperty	Parcel ID Search	DOA	Weekly	Download Data
Parcel ID (PIN) is made up of Major + Minor.
MyProperty	Basic Property Characteristics	DOA	Weekly	Download Data
King County Assessor data tables are refreshed weekly. Data for MyProperty is combined from multiple tables which can be found at the Assessor/DataDownload site.
MyProperty	LevyRate	DOA	Annually	Download Data
Levy rates calculated annually and in effect for the entire tax bill year.
MyProperty	Historical Value	DOA	Weekly*	Download Data
*Values generally change during posting, April - August. Values are static during the year but may change as the result of an appeal or other action.
Sales	Sales	DOA	Weekly	Download Data
Sales collected from recorded sales affadavits.
Sales	Sales by Property Type		DOA	Weekly
General Use Classification.
Census	Income	DOA/Census	-	Contact DOA
Census	Population	DOA/Census	-	Contact DOA
Census	Race/Ethnicity	DOA/Census	-	Contact DOA
Census	Educational Attainment	DOA/Census	-	Contact DOA
Census	Language at Home	DOA/Census	-	Contact DOA
Education	Area Schools and School Ratings	Great!Schools and Maponics	Per Great!Schools and Maponics
Data not available for download. Please contact Great!Schools or Maponics.
Permits	Permits	Jurisdictions/DOA	Weekly	Download Data
Permits collected from jurisdictions on a monthly basis. Timing of updates from jurisdictions differs.

GIS Search Layers

Search Layer	Description	Refresh Cycle	Comments	Data Steward	Download
City	Polygons for Cities and Unincorporated King County	As Needed	As annexations occur. Probably 4 times per year.	DOA/DPER	Download Data
Census Tract	Census Tracts	As Needed		KCGIS	Download Data
Commercial Appraisal Area	Commercial appraisal areas in King County	As Needed	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Community Alliances	Soundside Alliance, Sound Cities Association, Downtown Seattle Assoc.	Static		DOA	Contact DOA
Council Districts	Metropolitan King County Council Districts	As Needed		Elections	Download Data
Fire Districts	Fire Districts in King County as maintained by Elections	As Needed		Elections	Download Data
Hospital Districts	Hospital Districts in King County as maintained by Elections	As Needed		Elections / DOA	Download Data
Legislative Districts	Washington State Legistlative Districts in King County as maintained by Elections.	As Needed		Elections	Download Data
Levy Code	Washington State Legistlative Districts in King County as maintained by Elections.	Annual	Refresh annually when tax rolls are certified.	DOA	Contact DOA
Neighborhoods	Neighborhoods as defined by King County Dept of Transportation for The neighborhood coverage was generated for the ATIS application used by the Regional Automated Trip Planning group (RATP). This group assists Metro bus riders to get from one.	Annual		KCDOT	Download Data
Residential Appraisal Area	Residential Areas as identified by DOA for appraisal purposes.	Annual	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Residential Appraisal Districts	Residential Appraisal Districts as identified by DOA for appraisal purposes.	Annual	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Residential Sub Areas	Residential Sub Area Boundaries as identified by DOA for appraisal purposes. Removed polygons coded as 0 and 999.	Annual	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Seattle City Council	Seattle City Council boundaries approved by voters in 2013.	As Needed		Elections	Download Data
School Attendance Zones	School attendance boundaries collected by Maponics.	As Needed	Depends on Maponics refresh cycle.	Maponics	None
School Districts	School districts in King County as maintained by Elections.	As Needed		Elections	Download Data
Uninc Area Councils	Delineates area participating in the Unincorporated Area Council.	As Needed		DPER	Download Data
Zip Code	Zip Code Boundaries for King County.	As Needed		KCGIS	Download Data

GIS Map Layers

Display Name	Description	Refresh Cycle	Comments	Data Steward	Download
Parcel	Parcel layer joined with general property use.	Weekly		DOA	Download Data
Median Household Income	Combined tract boundaries and ACS data tables from Census.	Annual		KCGIS - for tract boundaries	Download Data
School Districts	School districts in King County as maintained by Elections.	As Needed		Elections	Download Data
Levy Code	King County Levy codes for the current certified tax roll year.	Annual	Will refresh in January when rolls are certified.	DOA	Contact DOA
Fire Districts	Fire Districts in King County as maintained by Elections.	As Needed		Elections	Download Data
Legislative District	Washington State Legistlative Districts in King County as maintained by Elections.	As Needed		Elections	Download Data
Residential Appraisal Area	Residential Areas as identified by DOA for appraisal purposes.	As Needed	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Commercial Appraisal Area	Commercial appraisal areas in King County.	As Needed	Should not change until 2019 but minor adjustments might require a refresh.	DOA	Contact DOA
Seattle City Council	Seattle City Council boundaries approved by voters in 2013.	As Needed		Elections	Download Data
Seattle City Council	Seattle City Council boundaries approved by voters in 2013.	As Needed		Elections	Download Data
Uninc Area Councils	Delineates area participating in the Unincorporated Area Council.	As Needed		DPER	Download Data
Zip Code	Zip Code Boundaries for King County.	As Needed		KCGIS	Download Data