A jewel-box renovation of a 3-story historic Brooklyn Brownstone aimed at bringing all the modern functionalities to a growing family of young professionals

Jewel Box House

Photography by reBuild Workshop


The Plan

The project reconfigured a historic brownstone into a two-unit residence, with an owner’s duplex occupying the upper two floors and a separate rental apartment at the garden level. The owner’s unit is organized around a generous kitchen and dining space that opens directly onto a new rear deck through French doors, strengthening the connection between interior living spaces and the outdoors. A powder room and storage are strategically located at the center of the parlor level, allowing new building systems to be integrated efficiently while maintaining a clear and open plan.

The upper level is arranged as a three-bedroom, two-bathroom residence with an additional home office, balancing privacy, flexibility, and everyday functionality.

The house retained an abundance of original millwork and wood detailing in good condition, much of which was carefully preserved and restored. While the original dark finishes were visually heavy, selective refinishing lightened the interiors and clarified the architectural hierarchy. Key elements—such as the fireplace and interior stair—were intentionally left in a darker tone, allowing them to emerge as focal points against a quieter, brighter backdrop.


Sustainability

The existing gas-fired boiler was replaced with a high-efficiency, concealed split-type heat-pump system that provides both heating and cooling. All existing windows and skylights were upgraded to high-performance units approved by the NYC Landmarks Preservation Commission, improving comfort and energy performance while respecting the building’s historic character. The exterior building envelope was insulated well beyond code requirements, significantly reducing energy demand and improving year-round thermal comfort.

Living room boasts restored and refinished bay window and great southern light.

A restored and refinished bay window brings abundant southern light into the living room, enhancing the home’s historic character.

Elegant fireplace with decorative white mantel, gold-framed mirror, vase of flowers, and artistic sculpture; flanked by two wall sconces and gold bird statues on the hearth. at a Park Slope Brooklyn brownstone project

A portion of the original fireplace mantel was preserved and refinished with soapstone, anchoring the room with material presence.

Interior view of a vintage staircase with wood railing and floral wallpaper - at a Park Slope Brooklyn brownstone project

The opening between the living room and entry hall was widened so the original staircase becomes an integral, visible part of the living space.

The new widened and reconfigured kitchen is the jewel piece of the house. Among other things, it features quarried marble countertops and backsplash, and custom wood cabinetry.
Modern kitchen with marble countertops, cream cabinets, gold hardware, gas stove with blue pot, and glass doors.A jewel-box renovation of a 3-story historic Brooklyn Brownstone aimed at bringing all the modern functionalities to a growing family

The reconfigured kitchen at the parlor level is the jewel of the home, defined by quarried marble countertops and custom in-set cabinetry.

New French doors at the kitchen open up to an outdoor seating area.

A custom marble vanity becomes the centerpiece of the parlor-level powder room, adding sculptural detail to a small space

Cozy narrow room with a white sofa, bookshelf, window, rug, and framed pictures. at a Park Slope Brooklyn brownstone project

A compact upper-level home office space designed for productivity and quiet retreat within the brownstone.

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