The agency says Calgary was the top contributor to the national advance in May, as prices for new homes rose 0.9 per cent.
Prices increased 0.6 per cent in both St. Catharines–Niagara and the combined region of Sudbury and Thunder Bay, Ont.
It was the largest monthly price movement in Sudbury and Thunder Bay since May 2012, when prices rose 1.6 per cent.
Princes for new homes decreased 0.3 per cent in Ottawa–Gatineau in May and dropped 0.2 per cent in both Vancouver and Edmonton.
Prices were unchanged in five of the 21 metropolitan areas surveyed.
Note to readers: This is a corrected story. The headline in an earlier version said new house prices rose 0.2 per cent in May instead of 0.1 per cent