Annexations and Municipal Boundary Changes

  • Annexations are filed quarterly
  • Missed filing date means 1/4 of annual revenues are lost for population
  • Minimum processing time prior to filing is two weeks
  • Census edits or missing documents delay processing
  • Call (360) 902-0599 for more information

Advisory Notice

Under statutes RCW 35.13.260, RCW 35A.14.700, and RCW 43.62.040, the count of population and housing in annexations or other boundary changes shall be made in "accordance with practices and policies, and subject to the approval of The Office of Financial Management (OFM)." Therefore, when contracting for these services, local jurisdictions should ensure that the consultant, by contract, is required to follow OFM's guidance and that their work be acceptable to OFM who must approve the results. Failure to follow the proper process could result in cities having to recount the annexed population and housing, costing additional funds.

RCW 82.14.415: Information for Cities Interested in Annexing Large Populations

The legislature passed RCW 82.14.415 to encourage cities to annex high cost areas. This incentive only applies to selected cities. RCW 82.14.415 provides tax incentives to cities annexing areas of 10,000 or more population for ten years after annexation. These cities annexing under RCW 82.14.415 are required to count the population according to RCW 35.13.260 and RCW 35A.14.700. For more detailed information, read about it here.

  1. Central Annexation Tracking System
  2. Annexation Certification Process PDF
  3. Annexation Certificate - Please contact Diana Brunink at (360) 902-0597 or the Forecasting Division at (360) 902-0599 to request the triplicate form that requires only a signature on the top form (no carbon needed). The three-part paper facilitates processing. Whenever possible, please call in advance and request a supply of Annexation Certificates.
  4. Forms, Manuals, and Training
  5. Quarterly Annexation Reports
  6. Assorted Annexation Reports
  7. Annexations Ranked By Size January 1990 - May 2002 Excel
  8. Municipal Research and Services Center of Washington - Annexation Manual
  9. City Codes Excel
  10. Annexation Database (by OFM approval date)
    • January 1, 2000 to April 1, 2009 Excel - Updated 11/30/2009
    • January 1, 1990 to December 31, 1999 Excel
    • January 1, 1980 to December 31, 1989 Excel

Last modified: February 03, 2010
E-mail: OFM.Forecasting@ofm.wa.gov