The agency says the increase was largely the result of higher new home prices in Ontario.
The combined metropolitan region of Toronto and Oshawa was the leading contributor to June's growth, with prices up 0.3 per cent from May.
The agency says that builders indicated that market conditions and new list prices were the main reasons for the increase in that area.
The Hamilton area west of Toronto, where prices rose 0.6 per cent, recorded the largest monthly price advance among the municipalities covered by the survey.
Prices were unchanged in six of the 21 metropolitan areas surveyed.