Search Mason County Property Tax Records

Mason County property tax records are kept by the Assessor's Office in Shelton and can be searched online through the county's TaxSifter portal. You can look up parcel numbers, assessed values, ownership history, and current tax amounts for any property in Mason County. This page explains how the search tools work, how assessments are set, when and how taxes are paid, and what exemption programs are available to qualifying property owners.

Mason County Assessor Property Tax Records

The Mason County Assessor's Office maintains records for all real and personal property parcels in the county. The office is located at 411 N Fifth Street, Shelton, WA 98584. The Chief Deputy is Ciara Stiles, reachable at (360) 427-9670 ext. 494 or at cstiles@masoncountywa.gov. The Assessor maintains ownership data, sets current market values, calculates levies based on taxing district budgets, and manages the county's parcel maps drawn from legal descriptions.

The Assessor also administers senior and disability property tax exemptions, forest land programs, and agricultural current-use programs. Property search and parcel information is available online through TaxSifter, which is linked directly from the Mason County Assessor's page. The 2026 assessed values are certified and available on TaxSifter now, reflecting market conditions as of January 1, 2025, based on 2024 and prior sales data. New construction is assessed as of July 31, 2025.

The screenshot below is from the Mason County Assessor's Office page, which links to the TaxSifter property search and lists the office's key functions.

The Assessor page includes direct links to TaxSifter, parcel map information, and details about exemption programs for senior and disabled property owners.

Mason County Property Tax Records Online Search

The county's primary search tool is the Mason County TaxSifter portal. You can search by owner name, parcel number, or street address. Results show property details, assessed values, tax amounts, and ownership history. The system is provided as-is, and the county does not warrant the accuracy of any data shown. Users agree to hold the county harmless for any liability from use of the data.

Delinquent taxes accrue interest and penalties monthly under RCW 84.56.020. TaxSifter will show if a property has a delinquent balance. The portal is useful for checking the current tax status of any Mason County parcel before making a purchase or refinancing decision.

The screenshot below is from the Mason County TaxSifter search interface, the primary online tool for property tax record lookups in the county.

TaxSifter shows assessed values, ownership history, and tax account details for Mason County parcels, including whether delinquent balances exist.

Mason County GIS Parcel Map Viewer

The Mason County GIS Department maintains a Parcel Map Viewer for interactive exploration of property maps across the county. You can search by parcel number, street address, or just click on the map. The viewer lets you turn map layers on and off, measure distances, zoom in, and print maps. Main map layers include parcels, zoning, election precincts, and related features.

One thing to note: parcels ending in 22-22222, 88-88888, or 99-99999 are placeholders from the paper-to-digital conversion process. These numbers do not affect property value or tax bills because appraisers use site visits and full legal descriptions. The GIS Department is updating these records as they are brought to their attention.

The GIS Department also creates standard maps for purchase, ranging from $18.25 to $30.00 depending on size and type. Map topics include address districts, election precincts, fire districts, school districts, physical appraisal areas, road atlas, and urban growth boundaries. Contact the GIS Department for current pricing and turnaround times.

The screenshot below is from the Mason County GIS Department page, which provides access to the Parcel Map Viewer and standard map products.

The GIS Parcel Map Viewer allows users to search by parcel or address and view zoning, precinct boundaries, and other map layers alongside parcel data.

Note: GIS data is for reference only. Verify parcel boundaries and legal descriptions through official county records before using them in legal or financial decisions.

How Mason County Property Tax Assessment Works

State law under RCW 84.40 requires the Assessor to appraise property at 100% of fair market value. Mason County follows this standard. The 2026 assessed values reflect market conditions as of January 1, 2025, based on 2024 sales data and prior years. Physical inspections run on a six-year cycle, with annual sales analysis keeping values updated between inspection years.

The Assessor sets levy rates based on taxing district budgets. Each parcel sits within a combination of districts, such as a school district, fire district, library district, and county general levy. The tax on any given parcel equals the assessed value multiplied by the combined levy rate for all districts covering that parcel. Rates vary across Mason County depending on which taxing districts cover a specific location.

Mason County Property Tax Payment

The Mason County Treasurer's Office handles all billing and collection for real and personal property taxes. Tax information is available online via Paydici or by calling 360-427-9670, ext. 475. Office hours are Monday through Friday, 9 AM to 4 PM, excluding county holidays. The Treasurer also manages cash flow, investments, and debt financing for the county and junior taxing districts.

Payment options include mail, in-person, online through Point and Pay, and ACH auto-pay. Online and phone fees are: credit cards at 2.5% (minimum $2.00), debit cards at a flat $3.95, and e-check at a flat $1.55. A $40 returned-item fee applies to all payment types returned by the bank.

Taxes over $50 can be paid in two halves under RCW 84.56. First half is due April 30 and second half is due October 31. Real property is subject to foreclosure three years from the tax due date. Personal mobile homes are subject to distraint on the same three-year timeline. Certified funds (cashier's checks, bank certified checks, or cash) are required for all delinquent accounts subject to distraint or foreclosure proceedings.

Real Estate Excise Tax Records in Mason County

Mason County also offers a REET Sifter tool at property.masoncountywa.gov/ReetSifter. This portal lets you view REET affidavits and supporting documents by searching for all or part of a statement number, parcel number, grantor name, grantee name, or street address. REET affidavits document the real estate excise tax paid when property changes hands in Washington. Verifying that excise tax was paid and exemptions were properly claimed can be important before or after a property transfer.

The REET Sifter is separate from TaxSifter but serves a related function. Where TaxSifter shows current assessment and tax data, REET Sifter shows the paper trail for property transfers, including when the sale occurred and what the stated sale price was. Together, these two tools give a fairly complete picture of any parcel's history in Mason County.

Note: REET affidavits are legal documents. Contact the Mason County Treasurer at 360-427-9670 ext. 475 if you need certified copies or have questions about a specific transfer.

Mason County Property Tax Exemption Programs

The Mason County Assessor administers senior and disability exemptions, forest land programs, and agricultural current-use programs. The senior and disabled persons exemption reduces the taxable value of qualifying homes. You must own and occupy the home as your primary residence and meet income limits set by the state. Applications and proof of income must be submitted to the Assessor's Office for review.

The Washington Department of Revenue maintains a full list of available programs and current income limits at the DOR exemptions and deferrals page. Agricultural and forest land programs assess eligible parcels based on their current use rather than market value, which can significantly reduce tax bills for farm and timber operations in Mason County.

Contact Chief Deputy Ciara Stiles at (360) 427-9670 ext. 494 or cstiles@masoncountywa.gov for details on applying for any exemption or current-use program in Mason County.

Appealing a Mason County Property Tax Assessment

Start any appeal by contacting the Assessor's Office at (360) 427-9670. Ask how your value was determined. Data errors, such as an incorrect living area or a bedroom count that does not match your home, can sometimes be corrected quickly. If a review of the data does not resolve your concern, you can file a formal appeal with the Mason County Board of Equalization before the deadline on your Notice of Value.

Bring evidence to support a different value. Recent sales of similar properties in Mason County are the most persuasive type of evidence. An independent appraisal also works. If the Board's decision does not resolve the matter, you can appeal further to the Washington State Board of Tax Appeals, which handles cases from all 39 counties in the state.

Cities in Mason County

Mason County includes Shelton (county seat) along with several small unincorporated communities. None of the cities in Mason County meet the population threshold for individual city pages in this directory. All property tax records for parcels anywhere in Mason County are handled through the Assessor and Treasurer offices located in Shelton.

Nearby Counties

These counties share borders with Mason County in western Washington. Each has its own assessor and treasurer managing property tax records independently.