OTTAWA - The value of Canadian building permits unexpectedly sank in June, hurt by a drop in construction intentions for apartment and condominium buildings in Ontario and British Columbia, data from Statistics Canada showed on Monday.

The 5.5 per cent decrease in the value of national building permits fell short of economists' expectations for a gain of 1.5 per cent. May was downwardly revised to a 2.1 per cent decline from an initially reported 1.9 per cent decrease.

Permits for residential buildings fell for the third month in a row, down 5.0 per cent as plans for multi-family buildings, which include apartments and condominiums, tumbled 15.8 per cent. That eclipsed a 4.2 per cent increase in plans for single-family homes.

The decline in building intentions for multi-family buildings was led by the provinces of Ontario and British Columbia, home to two of the hottest housing markets in the country, Toronto and Vancouver.

In Vancouver, which recently introduced a tax on foreign home buyers, permits slumped 25.2 per cent, mainly due to reduced plans for multi-family units. That slide came before the tax was announced in late July.

The value of non-residential permits also declined nationally, falling 6.2 per cent. Permits for institutional buildings tumbled 20.6 per cent on fewer construction intentions for hospitals, while industrial building plans fell 8.7 per cent.