A Rare Mid-Century Modern Masterpiece Inside the Beltway! Single-level mid-century modern 4-bedroom, 3.5-bathroom home in Pine Spring, Falls Church, VA. Renovated and expanded in 2021 and built for a seamless California-style indoor-outdoor living inside the Beltway. Three expansive sliding wall doors open the main living areas and primary bedroom to an Ipe Brazilian hardwood deck shaded by a motorized StruXure smart pergola with retractable screens, enclosing the space at the touch of a button into a climate-controlled outdoor room. The fully equipped outdoor kitchen includes a built-in grill, sink, and beverage refrigerator, all overlooking a flat 0.29-acre lot. Inside, the 2,305-square-foot open-concept layout centers on a waterfall-edge kitchen island and a handmade Mercury Mosaics ceramic tile backsplash. The primary suite features a spa-style bathroom with a deep soaking tub, private infrared sauna, and a walk-in closet with built-in storage and extensive designer lighting. A private secondary guest suite with ensuite full-bathroom and its own separate entrance offers flexibility for visitors or a home office. The exterior is clad in low-maintenance Ipe Brazilian hardwood siding, and a one-car garage plus a large crawl space provide generous storage. Originally built in 1952 and transformed by the 2021 renovation and addition, this Pine Spring home sits minutes from the Mosaic District's shops and restaurants, with quick access to Route 50, I-495, and under 3 miles to the the Dunn Loring-Merrifield Metro. Fairfax County Public Schools. Move-in ready.