Dumas kept the layout as is at the front of the house, but he updated the 1950s wallpaper and curtains with a much airier aesthetic.
"Running a business with your family is complicated, but being back together after six or seven years of living on our own has been a beautiful experience," she says.
Architect Charlie Lazor designed this peaceful, lakeside prefab in Ontario, Canada, with a Japanese-style bathroom clad in richly stained teak with a matching tub and sink by Bath in Wood.