The most popular services of the King County Recorder's Office are our online records search and marriage licensing. Search our free online database of King County's official records.Most documents recorded on or after August 1, 1991 are available online. This page give you the Minimum Requirements For Recordable Documents. For assistance with extensive land record's research, you may consider hiring a local title company or an attorney who is licensed to perform research. King County Recorded Documents. This page includes search options for: a) official public records. Here you will find forms that are used statewide in Washington Courts. Attorneys with appearances elsewhere in the courthouse may advise the clerk of their whereabouts to avoid a default. Our office records deeds, deeds of trust, cancellations, plats, assumed names, powers of attorney and other miscellaneous documents related to real estate.