Once owned by one of New Jersey's pioneering female legislators and later seen in an episode of "The Sopranos," a 110-year-old brick mansion in the hills of Montclair is every bit a modern mansion.

A 34,000-square-foot mansion in Alpine, New Jersey, has sold for $20 million, according to Homes of the Rich. The home was initially listed for $34 million back in June 2011; even at a steep ...