In 1888, Vincent Meredith married (Isabella) Brenda Allan (1867–1959), the youngest daughter of Andrew Allan, who had then succeeded his elder brother, Sir Hugh Allan, as president of the Allan Line and the Merchant's Bank etc. This marriage brought Meredith additional wealth and powerful connections. As a wedding gift, his father-in-law gave him and his wife a parcel of land on the corner of Pine Avenue and Peel Street in the Golden Square Mile, just across from Ravenscrag, where Lady Meredith's cousin, Sir Montagu Allan, lived. In 1894, they employed the architect Edward Maxwell to build them a house there, ""Ardvarna"", a turreted, red brick mansion, now known as "Lady Meredith House". Maxwell had also previously designed their summer house at Mont Saint-Bruno, Quebec. Lady Meredith House was designated a National Historic Site of Canada in 1990. Following the First World War, when wounded Canadian soldiers started to return from the Front in 1918, Lady Meredith set up a rehabilitation centre for officers at her and Vincent's Montreal home. During their 1939 Royal Tour of Canada, Lady Meredith was the hostess to King George VI and Queen Elizabeth The Queen Mother during their stay in Montreal, Quebec. In 1942, Lady Meredith donated the house to the Royal Victoria Hospital, Montreal as a residence for the nurses.