Pinhey built a large stone manor house on top of the hill in three different stages, in a symmetrical Georgian fashion. The stone house, which was completed 1822–1825, consisted of a large parlour and three small bedrooms (servants quarters) on the second floor. An addition, completed in 1841, consisted of the Grand Entrance with a staircase leading upstairs, the original dining room, the master bedroom over the front entrance and a second central hall kitchen wing for Mrs. Pinhey. By 1941, Horace Pinhey and his wife had moved into the log house with his wife. A south wing addition, completed in 1848–1849, consisted of Hamnett's Library, the pantry, the drawing room, several family bedrooms and a second floor indoor privy. A placard interprets the unusual second-floor privy, as Hamnett's Sanctum Sanctorum (the Holiest of Holies). Although a stone facade was applied to the front of Horaceville, where it faced the Ottawa River, faux finishes were applied on the less visible walls. To give the appearance of more expensive woods, painted grain patterns were applied to plain pine floors and doors.