The Ontario Court of Appeal recently considered this question in
Issa v Wilson.
Background
The plaintiff/respondent, Mr. Issa, was a 26-year-old first-time
home buyer who retained the defendants/appellants realty company
(Keller Williams Realty Centres) and real estate agent (Mr. Jarrah)
to help him find a suitable home to purchase for himself, his
parents, and his three sisters. Mr. Jarrah found one such home, the
MLS listing for which described the size of the home as being in
the 2000-2500 square foot range. Mr. Jarrah, who acted for both Mr.
Issa and the vendor of the home, told Mr. Issa that the home size