SeaTac Property Tax Records Lookup
SeaTac property tax records are administered by King County, which handles all assessment and tax collection for real and personal property in the city. The King County Assessor values SeaTac parcels each year, and Treasury Operations bills and collects property taxes. You can search parcel data, view assessed values, and pay online through the county's eReal Property system and tax payment portal. Taxes in SeaTac follow the standard King County schedule, with payments due in April and November each year. This page covers the main offices, online tools, and programs that SeaTac property owners rely on most.
SeaTac Overview
Search SeaTac Property Records Online
The King County eReal Property portal is the primary online tool for searching SeaTac property tax records. You enter a property tax account number, parcel number, or street address to pull up parcel-level data. The system shows property characteristics, assessed valuations, ownership details, and tax account status. Property Detail tabs include photographs, floor plans, square footage, and building sketches for most SeaTac parcels. The King County Assessor regularly photographs residences and most images are part of the public record.
Under Washington State law, RCW 42.56.070(9) prohibits using lists of individuals from this system for commercial purposes. The definition of commercial purposes includes using the list for general business purposes or communicating with individuals for profit-motivated activity. You must agree to these restrictions before accessing data. The Department of Assessments disclaims liability for accuracy and notes that information changes regularly.
The eReal Property portal gives SeaTac property owners fast online access to parcel data, assessed values, and tax account details.
The King County online tax system provides SeaTac property owners with easy access to tax statements, payment history, and assessed values for any parcel in the city.
King County Assessor and SeaTac Property Values
The King County Assessor's Office values all SeaTac properties and administers tax relief programs for King County residents. Customer service is a stated primary mission of the office. The office provides information on property values and details on how to appeal. It also administers tax exemptions for seniors, disabled veterans, and disabled persons who meet eligibility requirements.
Contact the Assessor at King Street Center, 201 S. Jackson St., Seattle, WA 98104. Phone is 206-296-7300. Email is Assessor.Info@kingcounty.gov. The office can also provide information about destroyed property tax relief for SeaTac owners whose properties suffered storm damage.
Residential appraisers use both the sales comparison approach and the cost approach to value SeaTac properties. The sales approach reviews recent comparable sales. The cost approach calculates replacement cost, subtracts depreciation, and adds land value. A rise in assessed value does not always produce a proportional rise in taxes, since the tax rate adjusts based on the total taxable value in the community.
Seniors age 61 and over in SeaTac may qualify for a King County property tax exemption. Applications can be filed online at senior-exemption.kingcounty.gov or by calling 206-296-3920. The City of SeaTac Senior Resource Guide also notes this program for older residents. City Hall is at 4800 South 188th Street, SeaTac, WA 98188-8605, and the main city phone is 206-973-4800.
Paying SeaTac Property Taxes
King County Treasury Operations handles all property tax billing and collection for SeaTac. The Treasury Operations page explains all payment options. Online payments use a secure eCommerce system with credit card, debit card, or electronic check. A service fee applies to all card and eCheck transactions. Mail payments go to King County Treasury, 201 S. Jackson St., Suite 710, Seattle, WA 98104. Include your property tax account number on any mailed payment.
In-person payments are accepted at the King County Customer Service Center at 201 S. Jackson St., second floor, Seattle, Monday through Friday from 8:30 AM to 4:30 PM. A secure drop box is also available on the corner of Second Avenue and South Jackson Street inside the security gates, accessible during the same hours.
Real Property in SeaTac includes residential and commercial land and structures on that land. Personal property includes assets used in conducting a business. Mobile homes and floating homes not associated with a real property account are taxed as personal property. Property tax exemption and deferral programs are available for seniors, people with disabilities, and military veterans with a service-connected disability. For payment questions, call 206-263-2890 or email propertytax.customerservice@kingcounty.gov.
SeaTac Parcel Viewer and GIS Maps
The King County Parcel Viewer makes it easy to search for SeaTac parcel information by address, parcel number, or condo name. You can zoom in on the map and click directly on any parcel to select it. Once selected, the tool provides direct links to the King County Assessor's eReal Property report and the Districts and Development Conditions report. The Parcel Viewer also links to Assessor property reports, GIS information, property tax information, and other county resources.
Advanced tools in the Parcel Viewer include Find Intersection, Zoom to Location, Select Parcels, Buffer Selected Parcels, and a Measure Tool. Layer controls include Address Points, Parcel Number Labels, the Parcel Layer, and King County Zoning. The database includes each SeaTac parcel's legal description, appraised value, recent sales history, square footage, and building construction details. The Parcel Viewer is accessible 24 hours a day and is free to use.
The King County Parcel Viewer is a map-based tool for finding SeaTac parcel data with quick links to assessment and payment records.
Use the King County Parcel Viewer to search any SeaTac address on an interactive map and link directly to that parcel's tax account and assessed value.
SeaTac Zoning Changes and Property Taxes
Property assessments in SeaTac can be affected by zoning changes. The City of SeaTac Planning Division adopted the Envision SeaTac 2044 major update to its Comprehensive Plan, Transportation Master Plan, and development regulations on December 10, 2024. Over 480 parcels throughout the city were rezoned, with all changes taking effect January 1, 2025.
SeaTac's Interactive Rezone Map is available online for property owners to check the current zoning of their specific parcel. A map identifying rezoned parcels and the current Zoning Map in effect are published on the Planning Division page. Rezoning can affect a parcel's assessed value in future years since the Assessor considers highest and best use under current zoning when setting values.
Chapter 3.85 SMC covers the Multi-Family Tax Exemption Program (MFTE) for SeaTac properties. This program may allow qualifying multi-family residential projects to receive a property tax exemption on the value of new construction for a set period. Property owners interested in MFTE should contact the SeaTac Planning Division directly for eligibility requirements and application procedures.
The King County property tax payment portal gives SeaTac property owners a secure way to pay online using eCheck or card.
SeaTac property owners can pay their taxes quickly through the King County Treasury online portal, which accepts electronic checks and cards around the clock.
Note: Zoning changes do not automatically change your property tax bill in the year the change takes effect. The Assessor values properties as of January 1 of each year for the following year's taxes. Changes adopted in late 2024 may start to affect assessed values in the 2025 or 2026 tax cycles depending on when the Assessor reviews your neighborhood.
King County Property Tax Records
SeaTac is located in King County. All property assessments and tax collection for SeaTac go through King County offices in Seattle. For a full view of county-level resources, the eReal Property search portal, payment options, and exemption programs, visit the King County property tax records page.
Nearby Cities
These cities are near SeaTac in south King County.