In about 1879–81 Douglas built a terrace of houses on his own land in Chester, 6–11 Grosvenor Park Road, the road leading to the main entrance to Grosvenor Park, in High Victorian style. About 1883 he designed Barrowmore Hall (or Barrow Court) at Great Barrow (since demolished) which was one of his largest houses. Also around this time he designed buildings on the Eaton Hall estate, including Eccleston Hill (1881–82), a large house for the Duke's secretary, the Stud Lodge, a smaller building of the same dates, Eccleston Hill Lodge (1881), a three-storey gatehouse at the main entrance to the park, with a high hipped roof and turrets, and The Paddocks (1882–83), another large house, this time for the Duke's land agent. In Chester city centre his designs included the Grosvenor Club and North and South Wales Bank (1881–83) in Eastgate Street, built in stone and brick, with a turret and a stepped gable, and 142 Foregate Street for the Cheshire County Constabulary (1884), with a shaped gable in Flemish style.