A statement from the Canada Mortgage and Housing Corporation said the figures were drawn from surveys in 10 urban centers across the country.

The report said the average cost of renovations was $12,800 and just 46 percent of respondents said the work was done within budget, while 37 percent said they experienced cost overruns.

As to who did the work, 31 percent said it was done by the homeowner, 26 percent said contractors were hired to do part of the job and 41 percent said contractors did the whole renovation, the CMHC said.

The corporation said the majority of upgrades -- 59 percent -- were done to update, add value or to prepare to sell, while 27 percent of homeowners said the work was necessary for basic maintenance.