It's been a long and winding road for 471 Washington Street, with stops in crazy design land and arrested development purgatory. So we think we can call this a comeback. Less than a month after officially hitting the market, five of the building's units are in contract. One of them is the private pool-sporting whopper of a penthouse, with 4,000 square feet indoors and the same amount of space outdoors, which was asking $15 million. Also in contract: one- through three-bedrooms ranging from $2.1 million to $5.75 million. That last unit, a 2,928-square-foot three-bedroom actually saw a 10 percent PriceUpper before going into contract. Guess the spring thaw strategy was a good one?