Find Property Tax Records in Thurston County
Thurston County property tax records are maintained by the combined Assessor-Treasurer office in Olympia and are searchable online through the A+ Parcel Search system. You can look up parcel numbers, assessed values, ownership details, and tax payment history for properties throughout this mid-western Washington county. Whether you own property in Olympia, Lacey, Tumwater, or a rural part of the county, this page explains how to search records and who to contact.
Thurston County Overview
Thurston County Assessor-Treasurer Property Tax Records
The Thurston County Assessor-Treasurer's Office manages both property valuation and tax collection. The office is located at 3000 Pacific Ave SE, Olympia, WA 98501. Call 360-867-2200 to reach the main line. For value-related questions, email ValueInquiry@co.thurston.wa.us. For exemption questions, email AsrInfo@co.thurston.wa.us.
The Assessor-Treasurer mails annual Value Change Notices to owners of residential and commercial properties. These notices reflect market conditions as of January 1 each year. You can also view them online through the A+ Parcel Search tool. The 2025 median single-family home price in Thurston County was approximately $516,000. The office was awarded the Certificate of Excellence in Assessment Administration (CEAA) by the International Association of Assessing Officers, which is a sign of strong assessment practices. Due to staffing reductions, the office recommends that property owners review their characteristics and the sales data used for valuation through the A+ system before calling.
| Office | Thurston County Assessor-Treasurer |
|---|---|
| Address | 3000 Pacific Ave SE Olympia, WA 98501 |
| Phone | 360-867-2200 |
| Value Inquiries | ValueInquiry@co.thurston.wa.us |
| Exemption Inquiries | AsrInfo@co.thurston.wa.us |
| Online Search | tcproperty.co.thurston.wa.us |
The screenshot below is from the Thurston County Assessor-Treasurer website, which provides access to the A+ Parcel Search tool and property value information.
The Assessor-Treasurer site is the main hub for Thurston County property tax records, exemption programs, and the A+ online parcel search.
Search Thurston County Property Tax Records Online
The A+ Parcel LookUp System is the direct public portal for searching Thurston County property records. You can search by an 11-digit parcel number, owner or taxpayer first or last name, a complete address, or just the street name. When using an address, enter the street name only without a type or direction suffix. For example, enter "Martin" instead of "Martin Way SE." Results can be sorted by owner name, address, or parcel number before you submit the search. Double-clicking the property number in results opens full ownership and parcel details. The system also has a feedback button so you can report data inconsistencies.
The screenshot below is from the Thurston County A+ Parcel LookUp, which is the county's primary online tool for property tax and assessment research.
The A+ system lets you search by parcel number, owner name, or address and returns current assessed values, ownership data, and tax account details.
For GIS-based searches and more detailed spatial data, Thurston County maintains the Thurston GeoData Center. You can look up properties by parcel number or address through the Property Information Report tool. After viewing property information, you can click to see the parcel in the county's online map viewer. Map layers include zoning, critical areas, watershed boundaries, school districts, park and fire districts, roads, and utilities. The GeoData Center also offers data downloads and custom GIS services for users who need raw spatial data. Note that the map data is not survey-grade accurate and should not replace professional engineering or legal surveys.
Thurston County Property Tax Assessment
Washington State law requires all property to be valued at 100% of fair market value as of January 1 each year. This standard is set under RCW 84.40. Thurston County uses sales analysis and mass-appraisal methods to set values across the county. The Assessor physically inspects one-sixth of all real property each year. The 11-digit property number on your Value Change Notice and tax statement is assigned by the Assessor and is the key identifier for your parcel in the A+ system.
Omitted taxes can be assessed for up to three prior years when improvements were not previously valued. In those cases, property owners get an extra year to pay the omitted amount. Spelling corrections or minor name changes can be made on the tax remittance stub. Legal ownership changes require a Real Estate Excise Tax Affidavit. Contact the Treasurer if you have recently paid off a mortgage to make sure the office has your correct mailing address and that your tax statements are reaching you directly.
Thurston County Property Tax Payment
The Thurston County Treasurer handles all property tax collections. The office is at 3000 Pacific Ave SE, Olympia, WA 98501. Tax statements are mailed once per year with coupons for both half payments. The 2025 median single-family home assessment of around $516,000 gives you a sense of scale for local tax bills.
Under RCW 84.56, taxes of $50 or more can be split into two halves. The first half is due April 30. The second half is due October 31. Delinquent current-year taxes incur a 3% penalty on June 1 and an additional 8% on December 1. Interest starts May 1 for the first half and November 1 for the second half. Not receiving a tax statement does not relieve you of the obligation to pay on time. If your mortgage company changed, notify the Treasurer's office so it continues to receive your tax information from GovTech Tax Pro Services, the county's partner for mortgage-company tax data.
The Treasurer accepts free eCheck payments online and offers a pay-by-phone service at (877) 741-7880. You need your Owner ID ready when you call. Yearly tax foreclosure sales are handled through Bid4Assets for parcels with long-term delinquencies. Contact the Treasurer at 360-867-2200 before foreclosure begins to resolve unpaid balances.
The screenshot below is from the Thurston County Treasurer's page, which covers payment options, due dates, and delinquency procedures.
The Treasurer's page also lists the pay-by-phone number and the online payment center for eCheck and card payments.
Tax Exemptions in Thurston County
Thurston County administers several property tax relief programs. The senior citizen and disabled persons exemption is the most common. It reduces the assessed value used to calculate taxes for eligible homeowners. You must own and occupy the home as your primary residence and meet the income limits set by state law. Email AsrInfo@co.thurston.wa.us to start an inquiry or visit the office at 3000 Pacific Ave SE in Olympia.
Other programs may apply to farm and agricultural land, open space, and timber land. The Washington Department of Revenue lists all current exemption programs at dor.wa.gov/taxes-rates/property-tax/property-tax-exemptions-and-deferrals. Income thresholds are updated by the state each year. Check that page or call the Assessor-Treasurer office at 360-867-2200 to confirm the current limits before you apply.
Appealing Your Thurston County Assessment
Disagree with your assessed value? Start by reviewing your property data in the A+ Parcel Search. Look at the characteristics recorded for your home and check the comparable sales the Assessor used. If something looks wrong, email ValueInquiry@co.thurston.wa.us. The office recommends this step before calling given current staffing levels.
If the issue is not resolved through an informal review, file a formal appeal with the Thurston County Board of Equalization. The deadline is printed on your Value Change Notice. You have 30 days from the notice date. Bring comparable sales data or an independent appraisal to support your case. If the Board's decision still does not satisfy you, appeal to the Washington State Board of Tax Appeals. That body handles appeals from every county in the state.
Note: You can only appeal the assessed value, not the tax rate. Levy rates are set separately by taxing districts and are not subject to Board of Equalization review.
Thurston County Auditor Recording Services
The Thurston County Auditor's Recording Division records and maintains property documents such as mortgages, easements, deeds of trust, and other real estate records. The office is at 3000 Pacific Ave SE, Olympia, WA 98501. Phone: 360-786-5405. Email: recording@co.thurston.wa.us. Note that on the first Wednesday of each month the office opens at 9:00 a.m. for staff training.
The Thurston County Auditor's online record index lets you search recorded documents by name or parcel number. Many documents are viewable online including deeds, agreements, covenants, easements, leases, maps, notices of trustee sale, ordinances, real estate contracts, releases, resolutions, and UCC filings. Photo copies of recorded documents cost $1.00 per page. Certified copies cost $3.00 for the first page and $1.00 for each additional page of the same document. You can order copies by phone, in person, or by mailed written request. Include the Auditor's File Number, a return address, and payment made out to the "Thurston County Auditor."
The Auditor also offers electronic document recording through four contracted vendors: CSC, EPN, Indecomm, and Simplifile. Maps cannot be submitted through eRecording and must be mailed or brought in person. Veterans can record DD214 discharge papers at no charge. The GeoData Center at geodata.org also provides map-based parcel lookups that complement recorded document research.
The screenshot below is from the Thurston GeoData Center, the county's official GIS portal for parcel mapping and property information reports.
The GeoData Center provides parcel boundary maps, zoning overlays, and property information reports that work alongside the A+ Parcel Search for full property research.
Cities in Thurston County
Thurston County includes several cities and communities. Three qualifying cities have their own pages in this directory:
- Olympia - the state capital and county seat
- Lacey - located in the northeast part of the county
- Tumwater - located just south of Olympia
All property tax records for parcels anywhere in Thurston County are processed through the Thurston County Assessor-Treasurer in Olympia regardless of which city a property is located in.
Nearby Counties
These counties border Thurston County in western Washington. Each has its own assessor and treasurer for property tax records.