Where Architectural Digest meets mountain serenity-welcome to 79 Marigold Way. A modern eco-luxe retreat nestled in the exclusive Broomgrass community, this 3-bedroom, 4-bath passive solar masterpiece was designed by acclaimed natural architect Sigi Koko and custom-built over two years with impeccable attention to craftsmanship, sustainability, and sensory living. At the heart of the 3,479 sq ft residence lies a dramatic two-story stone fireplace, with a "Rumford" firebox designed to reflect heat into the room. 180 tons of hand quarried limestone salvaged from a pre-Civil War era barn foundation in Shepherdstown was transported for the construction of the fireplace, retaining walls, and stone features, such as the cairn at the top of the driveway. Blacksmiths by local artisans at Anvil Works hand forged the fireplace screen. The open-concept living and dining space is anchored by hand-troweled, radiant-heated concrete floors and floor-to-ceiling windows that frame the seasonally shifting landscape and fill the home with natural light. The chef’s kitchen is as durable as it is refined, featuring Lukrete concrete countertops, custom bamboo cabinetry by Cohen Custom Cabinetry, natural-edge walnut accents, and eco-conscious finishes. Just steps away, a curved architectural wall leads to a cozy family room designed for quiet evenings and uninterrupted streaming, thanks to high-speed connectivity from nearby towers. The first-floor primary suite is a sanctuary in its own right, with an ensuite bathroom featuring double terrazzo sinks, an overhead rain showerhead, and a site-poured Japanese soaking tub crafted from concrete and polished to a soft finish- a sculptural centerpiece grounded in wellness and intentional design. Upstairs, two additional bedrooms share a cleverly designed bath featuring a space-saving sliding glass shower that can be accessed from either side, perfectly balancing function and flow. Both rooms feature sustainable cork flooring, soft underfoot, continuing the eco-conscious narrative. Both bedrooms offer captivating sightlines to the lush, living roof, an eco-friendly feature that acts as a thermal insulator to reduce energy consumption. A cozy second floor sitting nook provides access to the cantilevered balcony where you can enjoy the surrounding landscape or gaze at the night sky. From a glass walkway, you are led through an interior bridge to a separate studio apartment, complete with a full kitchenette, tiled shower, and a private balcony overlooking North Mountain and fields. Outdoors, every detail has been considered: a deep covered patio with a wood-burning fireplace, living roof blooming with sedum, and garden paths lined with lavender, hellebores, phlox, and mature crepe myrtles. Panoramic views of Sleepy Creek and North Mountain complete the immersive natural experience. This is a home where sustainable luxury meets editorial-worthy design. Geothermal heating and cooling, radiant floor heating, and passive solar orientation work in harmony with thick straw-bale wall insulation to create year-round comfort with reduced energy consumption. Clay and lime plaster offer both tactile elegance and natural breathability. Douglas Fir moldings and trim elevate every surface with warm tones. An underground water collection cistern, along with bio-kinetic septic system, provides landscape irrigation. Broomgrass is a 325 acre community comprised of 16, one-acre properties with shared ownership of the remaining 309 acres of pastures and woodlands in a preservation trust. Shared amenities include a large pool, hot tub, sauna, pavilion, and kitchen for community gatherings. A true unicorn property, seamlessly blending design pedigree, environmental ethos, and editorial appeal.