Edward the Confessor chose West Derby for his hunting lodge, and after the conquest West Derby was given to Roger of Poitou. The castle was probably built around 1100 by Roger, and was sited near St. Mary’s church in Meadow Lane.
The site may have been chosen because of its nearness to water (the Alt, and perhaps the stream which once flowed parallel with Meadow Lane). Coal was nearby (with outcrops at Croxteth) and there was plenty of woodland. The existing hunting lodge would also have been a factor. West Derby also stood on the crossroads of routes from Hale to Aughton and Liverpool to Warrington and Prescot.
West Derby Castle was repaired in 1197 and 1202. Archaeological excavation in 1927 and 1956 revealed oak beams (probable cross-moat bridge supports), pottery, metal, leather, horn/bone. The later excavation also discovered the remains of a palisade.
In 1213 a garrison of 140 foot soldiers, ten knights and crossbowmen were posted at the castle. But by 1235 all garrisons had been moved to Liverpool castle. A 1326 document mentions the “site of a ruined castle in West Derby” (Cooper & Power: 41), and the castle had probably gone out of use entirely by 1297. It had lost its importance at the same time that Liverpool, with its own castle, had risen to prominence. The site was finally levelled in 1817.