Spencer Pratt -- I'm Glad Heidi Montag's Mom is In Foreclosure

Heidi Montag's mother is facing a serious real estate problem back home in Colorado -- and no one could be happier than her son-in-law Spencer Pratt.

TMZ has learned a bank in CO is foreclosing on an undeveloped piece of property owned by Heidi's mom --- Darlene Egelhoff -- claiming she owes $187,385.62 on a $189k loan she took out in 2006.

When we reached out to Spencer for comment, he told us, "If that's true ... that is the best news I’ve heard all day long."

Apparently, Spencer still holds a grudge for the way Heidi's mom handled post-surgery Heidi on the season premiere of "The Hills" ... you remember, when she told Heidi she wasn't pretty and made Heidi cry.

Anyway, Spencer wasn't done going off on Darlene, and added, "Anybody who would do what she did to her daughter – my amazing, beautiful, magnificent wife Heidi – on national television ... should be put in a straight jacket."