Some homes are built to sell. This one was built to last a lifetime - and it has. Designed and built in 1958 by acclaimed mechanical engineer Fredrick G. Williams as his own personal residence, 9115 Levelle Drive is a testament to a level of intentional, uncompromising craftsmanship rarely seen today. Every proportion, sight line, and material choice reflects the vision of a man who knew exactly what he was doing - and who was building not for the market, but for his family. Now offered for only the second time in its history, this is a once-in-a-generation opportunity to steward a true original. Set on nearly an acre (.89 acres) in one of Chevy Chase's coveted enclaves and positioned at the end of a quiet dead-end street, the property unfolds with a sense of privacy and arrival. Mature trees and gardens - lovingly tended over decades - frame the home and yard,creating beauty across every season. The architecture is quintessential mid-century modern: clean horizontal lines, an effortless connection between interior and exterior, and an atmosphere of calm, purposeful elegance. Expansive floor-to-ceiling windows flood the home with natural light and draw the landscape in, reinforcing the sense of openness and retreat. At the heart of it all, a monumental fireplace surrounded by Pecky Cyprus wood which commands the main living space - the kind of architectural anchor that draws people together and defines a room. It isn't a feature. It's the soul of the home. With five bedrooms and three full bathrooms and over 3900 square feet, the layout is as generous as it is thoughtful. The main levels offer gracious, light-filled living, while the walk-out lower level opens up an entirely separate world of possibility: two generous bedrooms, a full bathroom, a sprawling family room, a dedicated office, and a laundry room - with room left over to imagine. Guest suite, au pair quarters, creative studio, or home gym - the lower level adapts to the life you want to live. Outside, a swimming pool anchors the rear grounds, inviting long summer afternoons and effortless entertaining surrounded by the privacy of tall trees and mature plantings. A two-car carport and additional driveway provide ample, easy parking - practical notes to a property that has thought of everything.. Overlooking a green lawn rather than a street, the only passersby are on foot or bicycle. To own 9115 Levelle Drive is to join a remarkably short line of custodians - just two families before you. The stories held within these walls, the care layered into these gardens, the integrity engineered into every beam: all of it passes to you. Homes like this don't come back around. This one is ready for its next chapter.