SeaTac Property Records Database

SeaTac property records are maintained by King County, which handles all parcel assessments, deed recordings, and property tax billing for properties within the city. You can search SeaTac property records online through the King County Assessor's eReal Property portal and the King County Recorder's document search to find ownership information, assessed values, recorded instruments, and parcel details, all at no cost.

SeaTac Property Records Overview

SeaTac was incorporated as a city in 1990, and all property records for SeaTac parcels are maintained by King County. The King County Assessor values every taxable parcel in the county, including all parcels inside SeaTac city limits, at 100% of true and fair market value as of January 1 each year. This is required by RCW 84.40.020. Assessment records for SeaTac are public, and any person can search them without providing a reason under the Washington Public Records Act, Chapter 42.56 RCW.

SeaTac is a dense urban community with a significant mix of residential, commercial, and airport-related properties. The mix of property types creates a varied assessment landscape, and the King County Assessor tracks each neighborhood and property class separately to keep values aligned with market conditions. Assessed values in SeaTac have risen considerably in recent years as the area has attracted more development and investment.

The King County Assessor maintains data on all SeaTac parcels through the eReal Property portal. Searching is free and returns detailed results including current owner information, assessed land and improvement values, parcel dimensions, building characteristics, and prior sale history. For most SeaTac property research, this tool is your best first stop.

King County Assessor Records for SeaTac

The King County Assessor is the primary source for SeaTac property records. The office maintains assessment data, ownership records, parcel maps, and sales history for every taxable parcel in King County. The eReal Property search tool at blue.kingcounty.com allows you to search SeaTac properties by street address or parcel number to find the current owner of record, assessed values, lot size, building details, and year built.

Exemption programs for qualifying property owners are administered by the King County Assessor. Seniors, disabled veterans, and disabled persons who meet income and residency requirements may be eligible for a reduction in their assessed value for tax purposes. These programs operate under state law and the assessor's staff can help SeaTac property owners understand eligibility criteria and the application process. Deadlines for exemption applications apply each year.

The King County Assessor portal is shown here:

The King County Assessor portal provides ownership data, assessed values, parcel characteristics, and sales history for all SeaTac properties in King County.

SeaTac Property Search Tools

The eReal Property search at King County is the fastest way to find a specific SeaTac parcel online. It loads quickly, does not require a login, and returns all the core property data in a single view. You can look up the owner, assessed value breakdown, parcel history, and building permits associated with any SeaTac address. The tool also links to aerial imagery and parcel maps for the property you searched.

For deed copies, mortgage records, lien searches, and other recorded documents, use the King County Recorder's document search. You can search by grantor or grantee name, parcel number, or document type. Recent documents are available as scanned images online. Older documents that predate digital imaging may require an in-person visit to the King County Archives or a formal records request submitted to the recorder's office.

The King County Property Search portal is shown below:

The King County eReal Property search portal provides parcel-level data for SeaTac properties including owner name, assessed value, lot details, and sales history.

The King County GIS iMap application and GIS Open Data Portal also cover SeaTac. These tools show parcel boundaries, zoning layers, aerial photos, environmental data, and other spatial information for SeaTac properties. Both are free and publicly accessible without any account registration.

Recording SeaTac Property Documents

Deeds, mortgages, liens, easements, and all other instruments affecting SeaTac real estate must be recorded with the King County Recorder. The recording office operates under RCW 36.22.010, which designates the county auditor as the official recording officer. Recording creates constructive notice to the public, so that anyone conducting a title search can find the document and know about any claim or transfer it reflects.

Under RCW 65.08.070, a conveyance of SeaTac real estate is not effective against a subsequent bona fide purchaser for value unless it has been recorded. This priority rule means that getting your deed recorded promptly after closing is essential to protecting your ownership interest. A delay in recording can create a title gap that may be difficult or expensive to fix.

Documents must meet formatting standards under RCW 65.04.045, including margin sizes, legible type, complete party names, and a recording cover sheet. The King County Recorder accepts documents in person at the King County Administration Building in Seattle and through eRecording services. Real estate excise tax must be paid before recording under RCW 82.45, with Washington's graduated rate applying based on the sale price.

Property Tax Information for SeaTac

SeaTac property owners pay taxes to multiple overlapping taxing districts. These include the City of SeaTac, King County, local school districts, fire districts, and other special purpose districts. Each district sets its own levy rate within limits set by state law, and the combined rate is applied to your parcel's assessed value to produce the annual tax bill. The King County Treasurer bills and collects all property taxes for SeaTac parcels and handles delinquency proceedings for unpaid accounts.

Property taxes in King County are due in two installments. The first half is due April 30 and the second half is due October 31. Payments received after these dates accrue interest and penalties. SeaTac property owners who need to discuss their tax situation should contact the King County Treasurer's office early, as options for payment plans and other assistance are available but must be arranged before the account reaches certain delinquency thresholds.

Tax foreclosure is the county's last resort for collecting long-overdue taxes. The process follows a statutory timeline and can result in the county taking title to the property if taxes remain unpaid past the legal deadline. The Washington State Digital Archives at digitalarchives.wa.gov holds historical property records for the SeaTac area, including older deeds and land transaction documents for chain-of-title research.

The Washington Department of Revenue directory at dor.wa.gov lists contact details for all county assessors and treasurers statewide, including King County offices that serve SeaTac property owners.

Key facts about SeaTac property taxes:

• First half due: April 30
• Second half due: October 31
• Late payments incur interest and penalties
• King County Treasurer handles all collection
• Multiple taxing districts apply to most SeaTac parcels
• Senior and disabled exemption programs are available

Historical SeaTac Property Records

SeaTac was incorporated in 1990, but the land that makes up the city has older property records that go back many decades under the records of the former unincorporated King County area. The Washington State Digital Archives at digitalarchives.wa.gov holds digitized versions of older King County land records, including early deeds, plat maps, mortgage records, and subdivision documents that cover what is now SeaTac. Access is free and available online at any time.

For researchers doing chain-of-title work, genealogy research, or historical studies of land ownership in the SeaTac area, the combination of the Digital Archives for older records and the King County Recorder's online document search for more recent documents covers most needs. The archives hold high-resolution scans of original documents, making even handwritten deeds and legal descriptions readable. The collection expands continuously through partnerships with county recorders.

Chapter 36.21 RCW governs the county assessor's role and establishes that assessment records are public records. The online tools provided by King County make exercise of that right fast and free for anyone researching SeaTac property ownership.

King County Property Records

All SeaTac property records are held by King County. The King County Assessor, Auditor, and Treasurer each maintain separate records related to SeaTac parcels. Visit the King County property records page for more detail on search tools, office contacts, recording fees, and county-wide resources.

View King County Property Records

Nearby Cities

These cities neighbor SeaTac and file property records through King County offices.