This $7.5M modern abode in Park Slope was once a humble carriage house

From an 1890s carriage house to this stunning modern home, the Park Slope property at 77 Prospect Place has quite the story behind it. According to Brownstoner, this building, along with two others, was purchased by the Brooklyn Union Gas company for use in an alternative energy experiment. 77 Prospect served as the company’s show house, and they installed experimental fuel cells on the roofs, the design of which was inspired by the Apollo spacecraft. More recently, in 2004, the building was completely renovated by the architect Philippe Baumann. He built out a chic, modern interior and added a second floor with a stunning open space that opens to an outdoor patio with a hot tub. Now it’s up for grabs, asking $7.495 million.

The main level of the home was finished with wide-plank floors, cedar ceilings, and a textured concrete wall. In the living room, a 30-foot-long skylight brings down a stream of light, which dramatically reflects off the ceiling beams.

This floor also holds an open kitchen and dining area. Windows from here overlook the neighboring gardens.

A wall of windows in the master bedroom looks out toward the home’s own private garden. The attached bathroom is decorated in shimmery tile and built-in, dark wood shelving. The exposed brick is part of the original structure.

A media room and two bedrooms are located on the lower level and provide direct access to the backyard. The 4,598-square-foot home has four bedrooms and four bathrooms total.

A wide staircase leads to the dramatic open space on the top floor. Details like exposed brick and the steel beams along the 12-foot ceiling recall the property’s earlier historic incarnations.

The best feature of this large entertaining space? There’s a bathroom, and the shower opens up directly to a hot tub on an outdoor terrace.

Here’s a look at the many outdoor spaces, including a roof deck, the hot tub patio off the building extension, and a private backyard.

You might never guess this home was once a modest carriage house, and you certainly wouldn’t guess it was the site of an alternative energy experiment. Its most recent expansion and renovation produced a striking, unique property that stands out on its traditional Park Slope block.

[Listing: 77 Prospect Place by the Gavriani-Falcone Team for Corcoran]

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Photos courtesy of Corcoran