If an older King County, Washington, permit is missing online, the County Archives’ permitting guide gives two different historical leads: permit registers and owner-arranged index cards. The Archives guide says actual permits issued before 1972 were not retained. A surviving register or card can still identify work and people to pursue, but it is not a substitute for an issued permit or final inspection record. The County Records Center separately describes some permit files from approximately 1970; for 1970–1972, ask staff which collection may hold the specific file rather than applying either date as an absolute cutoff.
Choose the register or card by date and search key
The Archives describes a June 1942–May 1943 county register held by King County Archives. A separate 1941–1972 register and 1954–1971 building permit index cards are at the Puget Sound Regional Archives in Bellevue. The cards are arranged by property owner and have more detail than a bare register entry. These overlapping historical series are not duplicate copies of one file. If you know only today’s street address, first assemble an approximate work date and the owner name at that time. Ask the correct archive which arrangement fits the location and year; a present owner’s name may not retrieve a card filed under a prior owner.
Write down exactly what an entry gives you, preserving these distinctions:
- The historical owner name and location wording used by the register or card.
- The entry date, permit or application number, and work description as printed.
- Which archive and series supplied the clue, so a register line is not later mistaken for a card or permit image.
If the only record is an early card, ask what its status field meant for that year before calling it an issued permit. Our old building-permit lookup guide offers a practical way to carry uncertain identifiers into a staff request.
Check which office would hold a later file
For a current public status lead, King County’s Where’s My Permit guidance points to Accela Citizen Access. It documents a no-login search by address, parcel, or permit number, then Record Info → Status on the matching record. That is a modern status route, not a search of the mid-century registers or cards. The county’s ProjectDox information puts screened building applications from October 21, 2024 onward in an applicant document-review workflow; those details should not be mistaken for a complete public permit archive.
For an existing file or plan, use the county Permitting Records Center instructions. The service is for unincorporated King County records; the page says the county may still hold a finalized permit for an area later annexed by a city. It describes residential permit files from approximately 1970, some residential plans from 1987, and commercial permit files from approximately 1970. Those are collection descriptions, not a promise for every parcel or project. A Seattle or other city-issued permit should start with that city unless the county confirms earlier custody.
The Records Center offers an account-based request or an emailed form. Use the property address, parcel number, or permit number available to you, and identify whether you need a permit file, plan, or inspection material. Its page gives the email address Permitrecords@kingcounty.gov for the completed form. If annexation is involved, include the approximate annexation period and explain whether the work predates it; ask which office issued the specific permit instead of guessing from today’s map. The city-versus-county permit guide explains why that issuing boundary matters.
Read the result without upgrading its meaning
The Archives also describes older certificate-of-occupancy references and code records as separate series. A register entry, application card, plan, and CO proceeding answer different questions. An early historical clue cannot establish that a final inspection passed, and a blank modern request or online view does not prove no county permit existed. If final approval is the issue, name the inspection or occupancy evidence you need when contacting the county; our final-inspection status guide can help identify it.
Find a pre-1969 certificate of occupancy
The certificates themselves no longer exist. Per the King County Archives permitting page, before 1969 the county recorded each issuance or denial in the Journal of Proceedings of the Board of County Commissioners. You search the handwritten Index to Commissioners’ Proceedings at the Archives by approximate issue date or by owner or applicant name. The Research Room is by appointment only: archives@kingcounty.gov or 206-263-2480. For 1937–1972 material at the Puget Sound Regional Branch, the county’s Permit records research page lists 425-564-3940.
Request a 1970-or-later county file and copies
- Start an account-based request in the Permitting customer support portal, or email the Permitting Research Request form (PDF) to Permitrecords@kingcounty.gov.
- For a formal Public Records Act request, use the county’s Public Records Program. Include a permit number, site address or parcel number. The county says it sends a written response within five business days.
- Expect plats to take longer. They come from an inactive records facility and can take up to a week to retrieve.
Reviewing a file is free. The county’s 2026 General Services and Supplies fee guide lists $0.15 per letter-size copy, $0.60 per sheet wider than 24 inches and $0.10 per scanned page. Fees under $2.00 per customer per day are waived.
To check status on a modern permit, search the application number (for example, DWEL21-0000) in Accela. On that portal, “Completion” means an issued permit has had its final inspections.
Official King County Archives and Permitting Division pages checked October 20, 2026.