Welcome home to 3108 Key Boulevard. Ideally located in the heart of the highly coveted Lyon Village neighborhood, this rarely available new residence rests on a picturesque, evenly proportioned property and encompasses approximately 6,010 square feet of refined living space across four finely finished levels. With views of tree-lined streets and Arlington's skyline, the home presents a private urban oasis while remaining within walking distance of neighborhood parks and playgrounds, gyms, trails, schools, Metro, and the area's finest dining and entertainment. With a Walk Score of 94/100, this location is a true Walker's Paradise. 3108 Key Boulevard showcases a thoughtfully conceived floor plan-spacious yet intimate, and perfectly attuned to its setting. The home is adorned with custom, high-end finishes throughout, including a gourmet chef's kitchen with furniture-grade cabinetry, a 48” Wolf gas range, Sub-Zero and Cove appliances, and an oversized island offering abundant storage and prep space. Seamless indoor-outdoor living is achieved with a screened porch and gas fireplace that flows to a stone patio and private rear yard-ideal for both entertaining and al fresco dining. The owner's suite provides a serene retreat with dual walk-in closets, a sitting area, and a spa-inspired bath. Secondary bedrooms are generously proportioned and feature en suite baths. The third-level loft offers versatile living space, an additional bath, and a covered porch with panoramic views of Arlington's skyline. The light-filled lower level includes a large recreation room, wet bar, fitness room, and guest or au pair suite with walk-up access to the rear yard. The residence is also elevator-ready, with a shaft in place for seamless future installation. Additional highlights include 10-foot ceilings on the main level, 9-foot ceilings on the upper and lower levels, and an oversized paver driveway providing ample off-street parking in addition to the attached garage. Thoughtfully designed and meticulously crafted by Rock Spring Homes, this new home embodies the rare combination of location, style, and quality in one of Arlington's most desirable neighborhoods.