EXCLUSIVE NEW TO MARKET  Grand & Elegant 6-Bd. Colonial Revival Mansion with Pool    This grand and elegant 6-bedroom, 11,000+ square-foot, white-shingled Colonial Revival mansion with 6 full and 3 half bathrooms was built in 2009. It features exquisite details and luxurious amenities. Designed by Robert A. M. Stern Architects, it is located in the exclusive, private community of Villanova Heights, adjacent to Riverdale's Fieldston Historic District.    The house features a columned entry portico; double-height entrance hall with barrel-vaulted ceiling; living room with fireplace; formal dining room; large center-island eat-in kitchen with marble and granite countertops and stainless-steel Sub-Zero and Viking appliances (including refrigerator, wine cooler, warming drawer, and 6-burner stove); butler's pantry; family room with fireplace and French doors to the rear patio and lawn; study; and library.    The second floor has 6 en-suite bedrooms, including a master suite with its own sitting room and fireplace, and two walk-in closets.    The third floor has a sitting room, a bedroom, a full bathroom, and two storage areas. The finished basement includes a recreation room, exercise room, wine cellar, powder room, and mudroom. Central air-conditioning. Elevator with access to all floors.    The cabana wing includes a powder room/changing room and has glass doors that lead outside to a porch and in-ground swimming pool.    There is a private parking court for 3 cars, an attached 2-car garage, and a level, grassy backyard. The property totals approximately 0.57 acres.