Although it is well known that kitchens and baths sell a house, exterior roomscapes and the lifestyle they suggest are emerging as the new must-haves. For many home buyers, the perfect dream property now includes terraced seating areas, private decks, and furnished outdoor living rooms; transitional courtyards and garden paths that blur the line between indoor and outdoor living quarters; alfresco dining rooms under vine-covered pergolas where a state-of-the-art grill and fire pit vie for attention with fountains, koi ponds, spas, and swimming pools.