A rare, double-wide Gilded Age mansion by Prospect Park in Brooklyn is on the market for $16 million, Gimme Shelter can reveal.

Built in 1887, the Park Slope mansion at 842 Carroll St. was designed by architect C.P.H. Gilbert. 

It’s one of three in a row designed by Gilbert and part of the Park Slope Historic District — and the only one that has retained its single-family mansion status, said listing brokers Thomas Handschiegel and Mackenzie Kyle, of Platinum Forbes Global Properties. And, at 32 feet wide, it is one of Brooklyn’s widest townhouses — far wider than the average 15- to 20-foot-wide structures. 

The posh property also comes with a presidential connection. Its first owner was the industrialist George W. Kenyon, a Harvard classmate of Theodore Roosevelt and an early supporter of Roosevelt’s political career. Kenyon’s company also had many government contracts, including manufacturing military uniforms for soldiers serving in WWI, according to reports. 

Only four families have owned the Romanesque Revival residence since its construction, the listing notes.

It had previously asked $12.78 million, down from $14.75 million last year with a different brokerage; it asked $15 million in 2024.

The current owners purchased the property in 1977. 

The 8,200-square-foot dwelling features 12 bedrooms, six baths, five powder rooms and 10 woodburning fireplaces — along with more than 1,200 square feet of outdoor space, including a landscaped rear yard.

There are also terraces off some bedrooms, and a brick patio and a garden area for al-fresco dining.

“Everything about this home is unique, from maintaining the original character and details to sweet touches that the current owners added,” Kyle told Gimme Shelter. 

And while the home has been thoroughly modernized, it retains exquisite historic details — including original woodwork, from the mahogany paneling to the oak entry doors and internal pocket doors.

The dwelling opens on the parlor level with a large entry hall anchored by a mahogany fireplace, a formal dining room and a sunlit living room. 

There’s also a large eat-in chef’s kitchen overlooking the garden.

Upstairs, a main bedroom suite features a terrace, a sitting room, a study and a spa-like bath. 

A top level boasts a loft-style two-bedroom with 12-foot ceilings, exposed beams, skylights, a fireplace and a separate kitchen and laundry.

Downstairs, there’s an additional two-bedroom garden apartment with backyard access.