
Frequently asked questions about property tax appeals
The Assessor’s office mails valuation change notices each year between May and November of the assessment year. Your assessment will determine the amount of taxes you pay in the following year. You can appeal your assessment once you have received your valuation notice. Petitions must be postmarked by the later of July 1st of the assessment year* OR within sixty (60) calendar days after the date of the value change notice (or other notice of determination). {WAC 458-14-056(2) and WAC 458-14-056(4)}
To lookup the appeal filing due date for your specific property, go to: https://blue.kingcounty.gov/assessor/eappeals/RPLookup.aspx, and enter in your property address or parcel. Once you have selected your property, your appeal due date will be shown. If the year for the due date displayed still shows 2018, then your 2019 assessment value change notice has not yet been sent. Please wait to file appeal your 2019 assessment appeal until after you receive your 2019 valuation change notice.
*Assessment year is the year before the tax is due (ex. 2019 assessment determines taxes payable in 2020, thus the 2019 assessment year corresponds to the 2020 tax year). Under very limited conditions, late petitions or appeals for previous assessment years may be accepted. {WAC 458-14-056; 458-14-127}
A petition form for each parcel must include the following information:
- Assessor’s parcel number
- Taxpayer name and address
- Taxpayer’s representative, if applicable (must include power of attorney)
- Property description to include property address, parcel size, zoning, and general building information
- Value as listed by the Assessor
- Your opinion of value
- Specific reasons why you believe the Assessor’s value does not reflect the true and fair market value of your property. Your petition must include sufficient information or statements to apprise the Board and the Assessor of the reasons why you believe the Assessor’s determination is incorrect. Assessment comparisons of other properties, percentage of value increases, personal hardship, amount of tax, and other matters unrelated to market value cannot be considered. {WAC 458-14-056(5)}
- Taxpayer’s signature and date
- Attach a copy of the Assessor’s revaluation change notice or other determination notice.
The Board cannot consider incomplete petitions.
Evidence is due twenty-one (21) business days before the hearing. If either the assessor or taxpayer fails to submit evidence by the due date, the board may take any of the following actions:
(a) If there is no objection by either party, consider the new evidence provided by either party and proceed with the hearing;
(b) If there is an objection by either party to the failure of the other party to comply with the requirements of this rule, the board may:
(i) Refuse to consider evidence that was not timely submitted;
(ii) Postpone the hearing for a definitive time period designated by the board, to provide the parties an opportunity to review all evidence; or
(iii) Proceed with the hearing but allow the parties to submit new evidence to the board and to the other party after the hearing is concluded. The new evidence must be submitted within a definitive time period designated by the board, and must be provided to each party with an adequate opportunity to rebut or comment on the new evidence prior to the board's decision. {WAC 458-14-066(4)}
Sales of the subject property and/or comparable properties are the foundation of our State’s market value standard. Accordingly, comparable sales typically provide the best indicators of market value. [RCW 84.40.030] This is particularly true for residential properties. The best comparables are sales located in your neighborhood, with similar land and improvement features, which sold closest to the valuation date at issue. For free assistance in finding comparable contact the Property Tax Advisor’s Office (for residential properties only) by calling 206-477-1060 or by emailing taxadvisor@kingcounty.gov. Alternatively, you may want to hire an appraiser or consult with a realtor. These type of service providers will generally charge some type of fee.
For the purposes of filing a complete appeal, as long as your petition includes sufficient information or statements to apprise the Board and the Assessor of the reasons why you believe the Assessor’s determination is incorrect, it is not necessary to include all the evidence you intend to use at your hearing. While it is recommended that you provide the evidence you will use as early as possible, additional evidence may be submitted up to twenty-one (21) business days before your hearing. {WAC 458-14-056(5)}
The Board schedules hearings on a first come, first served basis. Accordingly, the scheduling of your hearing will depend on the volume of appeals and the timing of your petition filing. You will be notified by mail of your hearing date approximately 45 days in advance. If the date of the hearing conflicts with your schedule, we can reschedule your hearing if you notify us within s (7) business days of the mailing date on your scheduling notice. If necessary or requested, your hearing may be held telephonically.
The hearing is an informal review where property owners may represent themselves without having to pay someone to argue their case. You and the Assessor's representative will have the opportunity to give oral testimony and review your previously submitted arguments and evidence. Each party will have the opportunity to question and rebut the other party's arguments and evidence. One or two hearing examiners/ board members typically preside over the hearing. The Board allows 40 minutes for each appeal.
The timely submission of evidence by both parties is essential to the fair hearings process. RCW 84.48.150 sets forth the timing requirements for each party, stating: 1) the Assessor must provide valuation information to the Taxpayer and to the Board at least twenty-one (21) business days prior to the hearing; and 2) the Taxpayer must provide valuation information to the Board at least twenty-one (21) business days prior to the hearing. Valuation information and documentary evidence includes, but is not limited to: comparable sales; income data & analysis; construction cost analysis; independent appraisals; contractor estimates of costs to repair building or land defects; documents delineating development limitations or easements; photos; maps; etc. If you miss the 21 business day deadline, late evidence may be submitted at the hearing; however, it will be subject to the late evidence process where the Assessor may object to the Board’s acceptance of it. Acceptance of any late evidence will only be made at the discretion of the Board. The Board encourages both parties to exchange evidence well in advance of the 21 business day deadline.
Either the Appellant or the Assessor may appeal the Board’s decision to the State Board of Tax Appeals. An appeal must be filed with the State Board within thirty (30) calendar days of the mailing date of our Board’s decision. Appeal forms are available at the Board of Tax Appeals website (www.bta.state.wa.us) or by phone at 360-753-5446. These forms are also available by contacting our office. {WAC 458-14-170(1)}