A variety of assessment data is available in electronic format for download from our ftp site at ftp://ftp.snoco.org/assessor. Snohomish County has made every effort to make the data freely and readily accessible. Due to the variety of user system configurations and security software, we are not able to provide technical assistance if you are unable to download the data. If you have difficulty downloading the data it is recommended that you check your security software to see if it is set for passive FTP, is blocking ZIP files, set to allow only small amounts of data to be downloaded or if the county FTP address is being blocked. As an alternative, assessment data is available on CD. Please contact our office for instructions on how to acquire the data on CD.

Spatial Data (GIS - Geographic Information Systems)

Snohomish County has a distributed GIS program with GIS work groups located in Public Works, Planning, Information Services and the Assessor's office. The Assessor is the custodian of a variety of spatial data layers and has these available for FTP download at no cost. New extracts are posted to the FTP site on the first county business day each month.

• City Boundaries- 347 KB Updated as needed
• Municipal Annexation History - 1.16 MB Updated as needed
• Tax Code Areas - 1.42 MB Updated annually
• Easements - 6.00 MB Updated monthly
• Subdivision Lots - 45.2 MB Updated monthly
• Appraisal Neighborhoods - 395 KB Updated as needed
• Parcel Centroids - 29.7 MB Updated monthly
• Parcel History - 67.1 MB Updated monthly
• Current Parcels - 80.6 MB Updated monthly
• Public Land Survey Grid - 7.55 MB Updated as needed
• Rights of Way - 36.6 MB Updated monthly
• Subdivision Boundaries - 10.7 MB Updated monthly
• Land Records Annotation - 26.5 MB Updated monthly
• Parcel boundaries and annotation in DXF format - 37.2 MB Updated quarterly

Tabular Data

Selected extracts from our tabular data systems are available for free download.

• Assessment roll - text version - 24.3 MB Updated monthly
• Assessment roll - dbf version - 25.1 MB Updated monthly
• Assessment roll - Microsoft Access version - 37.2 MB Updated monthly
• Property Characteristics for 2003 (text format) - 44.6  MB Updated Annually
• Property Characteristics for 2004 (text format) - 46.8 MB Updated Annually
• Property Characteristics 2004 for GIS (dbf format) – 14.9 MB Updated Annually
• Property Sales Extract - 8.87 MB Updated Annually

The Assessor's office will continue to enhance its data offerings in the future.