EXCLUSIVE NEW LISTING  Spacious & Bright 4-Bd. Ranch House on Half an Acre with Patio & Large, Level Grassy Yard    This spacious 4-bedroom, 3-bath, ranch-style house was built in 1953. Set on nearly half an acre, it enjoys an inviting rear dining patio and a large level, grassy backyard.    There is potential, subject to planning permission, to expand the house upward, so please consult your architect.    Standout features include: an entry foyer; living room with wood-burning fireplace and southern bay windows; formal dining room; windowed kitchen with door out to the patio and yard; 4 bedrooms on the main floor (including the master bedroom suite); central air-conditioning; private multi-car driveway; attached 2-car garage; 0.45-acre lot.    Near Wave Hill public gardens and culture center. Great location for schools, Metro-North trains and express buses to Manhattan.