Frank Lloyd Wright’s Fallingwater, a private home situated over an active waterfall in forested Mill Run, Pennsylvania, stands as arguably the architect’s most celebrated work. The house, which opened in 1938, is defined by a series of stucco-covered concrete cantilevered terraces fixed to the natural rock of the fall, with a façade constructed of local sandstone slabs that create a visual kinship with its environment. Critics raved after the opening, with Time magazine calling it Wright’s “most beautiful job” in a January 1938 cover story, and it was later lauded as the “best all-time work of American architecture” by the American Institute of Architects. The structure embodies a harmony between site and design that the architect championed throughout his career.
The clients, Pittsburgh department store magnate Edgar J. Kaufmann and his family, agreed to the design after their son, Edgar Kaufmann Jr., introduced them to the architect in 1934. The family desired a natural family retreat at their favorite countryside destination: a 30-foot waterfall on the Bear Run tributary in southwestern Pennsylvania’s mountainous Laurel Highlands. Wright told the clients in 1935 that he wanted them to “live with the waterfall”, not just to look at it, but for it to become an integral part of their lives. His design for Fallingwater therefore suspends the architecture above the fall itself, filling the home constantly with the powerful sound of rushing water.
According to accounts by Wright’s apprentices, after procrastinating on drawing any plans for nine months, Wright designed the house in two hours in September 1935 while the Kaufmanns were driving to his office to review them. Working drawings were ready by January 1936 and the project began construction in April that year. The Kaufmann family moved into the completed 9,300-square-foot main house (4,400 square feet of which are the outdoor terraces) in December 1937. Soon after, they contacted Wright again to design an additional 4,990-square-foot guesthouse built in 1939, with 1,950 square feet of its own terraces, connected to the main house by a covered walkway.
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The horizontal orientation of the home’s large terraces recalls two of Wright’s prior residential architecture explorations: the Prairie-style architecture inspired by the flatlands of the American Midwest, and his Usonian houses, an urban planning concept for ideal living that consisted of neighborhoods of small L-shaped abodes with a strong indoor-outdoor connection. Concurrently with the design of Fallingwater, Wright was exploring designs for the Usonia house. The vertical elements of the home—its structural piers and chimney—were clad in native sandstone laid in horizontal striations to match the forms in its natural surroundings. Wright used flagstone flooring inside and out and employed large sheaths of glass windows for visual continuity.
The material palette is simple and largely unadorned, aside from two paint colors: ochre on the concrete elements and Cherokee red, the architect’s signature earthen hue, on the steel sash windows and doors. Wright designed almost 170 custom wood furnishings for the house in a style that blended harmoniously with the architecture. The interior layout focuses on Wright’s signature concept of compression and openness, where small spaces lead to large open-plan ones. On the first floor, visitors move through an intimately sized entry to a continuous dining and living room, with a hatch in the floor opening to reveal an exterior suspended staircase leading down to the Bear Run stream.
While the house was built as a private residence, it has always functioned as a public museum since the Kaufmann family entrusted its custody to the Western Pennsylvania Conservancy in 1963. The organization turned the house into a public museum and oversees its preservation. It is interesting to note that Wright’s philosophy of “organic architecture” often prioritized the experience of the structure over long-term material durability. Unlike modern structures designed to withstand centuries, Wright’s designs were frequently conceived as responsive to their immediate environment, meaning the preservation of Fallingwater requires a constant battle against the very elements the architect intended to integrate into the home’s design.
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From 2023 to 2026, the home was partly under scaffolding as the Western Pennsylvania Conservancy embarked on a $7 million preservation project. Over the years, Fallingwater has been experiencing water leaking into its interiors and has seen cracks, rust, and corrosion begin to form across some structures. The renovation effort—the Conservancy’s most full ever—restored or replaced building systems that had been weakened over time by exposure to nature.
“Because Fallingwater is so integrated into its setting, the effects of time and weather have really pushed the building systems to the ends of their useful lives,” explained Fallingwater Director Justin Gunther in a January 2024 video. The work now assures that the historic structure is watertight—and ready for future generations of visitors to enjoy the spectacular integration of its architecture design and natural setting. The preservation project included injecting 12 tons of liquid grout into the home’s hollow walls to prevent the infiltration of water, mending cracks in its masonry and mortar joints, waterproofing all its flat roofs and flagstone terraces, fixing or replacing corroded steel frames for windows and doors, resealing windows and doors, and repairing degraded concrete.
Fallingwater remained largely open to visitors while this extensive work was ongoing, however, parts of the structures were covered during various times throughout the reconstruction. On March 14, 2026, the house reopened to the public with all the project scaffolding and enclosure covers removed. The home is now a museum open to architecture aficionados from around the globe. Surrounded by 1,543 acres of natural land, the architecture is integrated with the spirit of its awe-inspiring environment. While its form is distinct and standout, Fallingwater was designed for a family to live in and among nature.