The Map Index is a list of all official subdivision maps (Parcel Maps and Tract Maps) and Records of Survey of lands within San Luis Obispo County on file with the County Recorder's Office and all official Corner Records filed by Licensed Surveyors/Engineers with the County Surveyor sorted by various categories such as owner, date of recording, Surveyor/Engineer, etc. Copies of the maps are not available from the Public Works Department, please contact the County Recorder's office to obtain copies of the maps.

The Plan Index is a list of all construction drawings and record drawings ("as-builts") of improvements to public roads and other infrastructure on file with the San Luis Obispo County Public Works Department (PWD) sorted by various categories such as Tract Number, Engineer, Owner, etc., each drawing has a numerical file name (e.g. "231123"), please reference that number when requesting a copy of the drawing. Drawing numbers 1-24999 are unavailable in digital format at this time, contact the PWD to obtain copies. Document numbers >25000 are in digital (TIFF) format.