Rockhall was originally a plain 16th century stone laird's house, founded by Sir William Grierson. In the late 17th century, the Griersons of Lag founded the L-plan tower house, when adding the main block, with a stair tower in the re-entrant angle. The vaulted basement of the 16th century wing, contains an old kitchen and a cellar lit by slit windows. Since the 17th century, the house has been substantially altered internally and externally, with larger windows fitted and the roof level altered. The house is the successor to Rockhall Mote, which is sited on the ridge to the north. A mile south is Mouswald Place.