Tucked away on a quiet, tree-lined street in one of the Main Line's most coveted neighborhoods, 509 Northfield Road is a rare offering that blends traditional architecture with thoughtful modern updates. From the moment you arrive, the home's stately curb appeal — stone façade, cedar roof, manicured landscaping, flagstone walkway, and gracious entry — sets the tone for what lies within, nearly 4800 square feet across 3 floors of beautifully appointed living space. The exterior front elevation has been completely transformed by Rene Hoffman and McDermott Construction. Stucco no more, but a reimagined facade featuring a new porch, threshold and wooden French doors, beautiful stonework, and HardiBoard siding. A new flagstone curved walkway is adorned with new landscaping by Naturescapes. Step inside to discover a sun-filled 2-story foyer with a grand staircase, gorgeous living room, and spacious dining room, all inviting you into a functional layout designed for both family comfort and entertaining. The bright kitchen, fitted with granite countertops and SubZero and Thermador appliances and attached breakfast room flow effortlessly into the great family room with its stone-faced fireplace and large picture windows, skylights, and patio doors that showcase serene views of the backyard and pool. The main floor is complete with a laundry/mudroom and powder room AND a bonus flex room providing space for crafts or teenage hangouts. Head back in the foyer and up the staircase where natural light abounds. The primary suite with full walk in closet offers a private retreat with a spa-inspired ensuite bath featuring a soaking tub and double vanity. At the end of the balcony/hall are three additional sizable bedrooms and a hall bathroom which provide comfort and flexibility for family and guests. The lower level, designed by Ann Decker Design and constructed by Buck Ridge, now has easy stairway access to the patio and pool. Once a raw, unfinished basement, is now a full entertaining space with a wet bar complete with gorgeous Onyx countertops, Cafe appliances, and custom built cabinetry. Don’t miss the quiet office, dedicated gym space, full glass shower bath with heated floors, 2nd laundry and a Sonos system wired throughout. Outside, an expansive backyard retreat complete with a stunning in-ground pool and flagstone patio, overlooks a lush, landscaped yard enclosed by estate fencing. Whether it’s summer barbecues or quiet mornings with coffee, this is the spot to relax and unwind. Additional amenities include a whole house generator, 4 zoned HVAC and 2 mini splits in the lower level, 3 fireplaces (gas, wood, electric), new garage doors. The property’s prime location means you’re just minutes away from top-rated Tredyffrin-Easttown School District, private schools, boutique shopping, premier dining establishments, and the Devon or Paoli train station for easy commuting. Don’t miss the chance to make this stunning Devon home your own—schedule your private tour today!