Lateral view of Legault house in 1978

Lot 165 was initially granted to Michel Préseau dit La Rivière Chambly in 1678, then sold to Daniel Allard. The house already existed when Augustin Legault acquired it in 1800. At the same time, he also acquired the neighbouring lot 166, which had been granted to Pierre Cabassier in 1684. The property remained in the hands of the Legault family for almost 200 years.

The house is built with stacked-timbers – pièce sur pièce. The foundation is of fieldstone, as are the chimneys, which are staggered in the Norman fashion. The framework is built of tree trunks and the ridge roof is covered with cedar shingles, extended by drip-mouldings, which post-date the original construction. In 1941 Armand Legault covered the ground floor exterior with beveled clapboard imitating stone. There are also wooden footings. The annex in the back dates from 1955.

 
The architectural elements of the house have largely been preserved: tongue-and-groove floorboards, 10 to 12 inches wide; timbered ceilings with mouldings and solid transverse beams; fieldstone fireplace as well as period wrought-ironwork forged by hand. The Legault family also kept the basement's dirt floor. Traces of an old bread oven have been found in the west wall.

The Pointe-Claire Legaults were descendants of Noël Legaud dit Deslauriers. A soldier from Cornouailles Ervillac, to be precise – he immigrated to New France in the 17th century and married Marie Besnard in Montréal in 1698. The couple moved to Pointe-Claire in 1702.