Chester House was a dark bay horse bred by his owner, Khalid Abdullah's Juddmonte Farms breeding operation. He was sired by Mr. Prospector and out of the El Gran Senor mare Toussaud and was his dam's first foal. Toussaud later produced Belmont Stakes winner Empire Maker. Chester House was sent to be trained in England by Henry Cecil at his Warren Place stable in Newmarket, Suffolk.
