Slumping oil prices are likely to impact Calgary's real estate market in the coming year, causing home prices to slow their rapid acceleration in Alberta's largest city, according to a report by realtor group Re/Max. The average sale price of a Calgary home is expected to rise by only three per cent in 2015 to $497,500 after shooting up six per cent in 2014, as more buyers are expected to sit on the sidelines to see if the recent slump in oil prices will make houses cheaper.