Providing residential real estate appraisals quickly, professionally. We can offer RUSH service if you need it same day or next day. Barton Appraisal is based in Leawood, KS, specializes in Johnson County, including large estate properties, and serves the eight counties that comprise the KC metro area. Counties served are: Johnson, Jackson, Cass, Clay, Platte, Wyandotte, Miami, and Leavenworth.