Built in 2007 and designed by Smith-Miller and Hawkinson Architects, this five-bedroom Sagaponack Contemporary asking $3.995 million is one of nine homes that are part of the Houses at Sagaponac, a showcase of modern architecture.

The project, started in the early 2000s by developer Harry J. Brown Jr., who died in 2005, was originally expected to have 32 homes.

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“There are good architects, and there are great architects,” says Tyler Mattson of Compass, who is co-listing the property with Brian Buckhout. “The level of detail, thought and care that went into this particular house is above and beyond the norm.”

The 3,700-square-foot, L-shaped house has walls of glass, panels of wood and a stone courtyard that sits underneath. The outdoor living area off the dining room has a fireplace. Also on the property are a gunite pool with a pool house and studio with a full bathroom.