The Recorder's Office maintains property surveys recorded since 1973. Property surveys are often used to determine property boundary lines. Not all properties in King County have Records of Survey filed. All recorded Plats, Short Plats, Condominiums and Planned Unit Developments in King County are available for viewing and printing at the Recorder's Office or at the King County Archives. The Recorder's Office has images of approximately 70,000 maps in digital format available online.