Chateau-inspired Springbank estate sells for less than a third of original $20M asking price It's still the most expensive home sold in Alberta so far this year, says real estate Mark Evernden. Social Sharing It's still the most expensive home sold in Alberta so far this year, real estate agent says CBC News · Posted: Dec 17, 2020 4:42 PM MT | Last Updated: December 18, 2020 Terre Blanche is a 17,500-square-foot home on 2.6 acres of land in Springbank, a rural community west of Calgary.(Sona Visual/Mark Evernden)