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Building Construction Update

King County Archives is happy to announce that our building renovation is complete, and we are moving staff and the collections back on-site. We continue to offer remote reference services only, but we hope to resume in-person reference later this year. Reference requests may be submitted via email or by calling (206) 263-2480. 

Reference requests are processed in the order in which they are received. When submitting a request, please provide as much specific information about your topic (i.e., recording numbers (if relevant), dates, names, places or addresses, etc.) as possible. Please do not include your Social Security number (SSN) in your request 

NOTE: Please note that we do not hold birth, death, divorce, or name change documents, nor do we hold court case files. Click here to view research guides that contain information on which county agencies hold those records. You should contact the appropriate county agency directly to request those records


For better service, please see the following before submitting a request:

Many vital records are kept by other offices or institutions.  The following information is provided as a resource only.  King County Archives is not responsible for hours or service options of external offices:

Divorce records: Click here for more information.

Birth or Death records: Click here for more information.

Name changes: Click here for more information.

Court case files: Click here for more information.


The Archives has limited commercial/residential building records, unless they are County government buildings and structures:

Photographs of your house/property: Click here for more information.

Blueprints, construction plans, building plans, etc. for residential properties: Click here for more information on residential properties. 

Blueprints, construction plans, building plans, etc. for commercial properties: Click here for more information on commercial properties.

Permitting records: Click here for more information in obtaining permitting records for residential and commercial properties.

***NOTE: When contacting the Archives, please do not include your Social Security Number in your communication. We do NOT need or use your Social Security Number for proof of identification or to conduct research.

Request marriage records, deeds, and other King County recorded documents online

Marriage Certificates

Certified copies of King County marriage certificates cost $3.00 each (plus a small processing fee).
Marriages 1989 or earlier     Marriages 1990 to present

Other Recorded Documents

For recorded documents other than marriage records, such as deeds, easements, surveys, and other property records, choose from the below:

Recordings August 1991 to present    

Recordings prior to August 1991    

In a hurry?
No appointment is necessary to view pre-August 1991 microfilmed recordings at the Archives. Our self-service research room is open Mondays, Tuesdays, Thursdays and Fridays 9am - 4pm.

Search historical records of King County government

Search over 200,000 records describing King County's archival collection, bookmark items of interest, and request copies or a viewing appointment.

Looking for Divorce Records?

Historical house photographs

    Historical Assessor's Property Record Cards include photographs of buildings throughout King County from 1936-1972 and are at the Puget Sound Regional Archives (PSRA). Call or email PSRA staff with the property's tax parcel number to order photographs or copies of the cards themselves.

    Property Record Cards of platted property from parcel number 000900-0010 to 133930-0075 are available online through the Washington State Digital Archives: King County Assessor, Real Property Record Cards, 1937-1972.

Building history research

This in-depth research guide, Researching the History of Seattle and King County Buildings (PDF) walks you through many resources and strategies for researching the history of local buildings.

Published by Seattle Public Library Special Collections (external link), the guide was revised in 2014 in collaboration with the King County Archives to expand its coverage beyond Seattle city limits to all of King County.

Our mission is to collect, preserve, and provide access to historical County records document the history of King County's land, people, culture, and governance foster appreciation and understanding of King County's ongoing history

...and to support civic engagement and transparency in King County government.

TTY Relay 711

Monday, Tuesday, Thursday, and Friday: 9 am-4 pm

Please note the Archives is closed Wednesdays.