The new kid on this otherwise out-of-the-Twenties block of cottages in Hyde Park is on the block again. Built in 2008, the property west of Montrose Blvd. and south of West Gray St. sold in March 2009 at $629,450 and again in September 2011 at $725,000. Last month, the HardiePlanked home on a 4,800-sq.-ft. lot popped up as a new listing one more time, asking $819,000. The house sits behind a fence with an automated gate across a double-wide driveway. Three crisply trimmed dormers rise above the 2-car garage and a recessed, at-grade porch like whitecaps on water. Just a few doors down at Montrose, there’s a convenience store and that 10-year-old, 14-unit, 4-story stucco condoplex known as the Renaissance on Montrose.