An 11,590-square-foot Bridgehampton estate is the latest by designer James Michael Howard to hit the market. The asking price is $11.95 million.

Filled with furnishings from around the world, the seven-bedroom, 10 1⁄2 -bath mansion on 1.08 acres was designed by Howard — whose wife, designer Phoebe Howard, writes a monthly design advice column called Dear Mrs. Howard and co-owns and operates Mrs. Howard stores. For this home, James Michael Howard collaborated with Bobby McAlpine of McAlpine-Tankersley Architecture and Landscape in New York City, Atlanta, Nashville and Montgomery and Alabama, and Michael Derrig of East Hampton-based Landscape Details Inc.

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Interior architectural details include high timber- and groin-vaulted ceilings, floating stairs and custom British-built mahogany windows and doors with European-style hardware. There are also Marmorino plaster finishes, inlaid parquet floors and custom mosaic marble floors.

A porte cochere built using reclaimed cobblestones leads to the home’s foyer and entrance hall. Inside, a great room with 30-foot beamed ceilings and walls of windows includes multiple seating areas, a custom fireplace, gallery and formal dining room with doors to a terrace.

The dining room flows to a study with Paul McCobb chairs and a fireplace. A professional-grade eat-in kitchen includes a 10-seat breakfast area with a fireplace and custom leather banquette. The foyer and gallery open to a large family room with tea-paper ceilings.

A first-floor master bedroom wing includes a sitting area with fireplace, walk-in closet and en-suite bath with marble-slab walls, a stand-alone tub and Van Cleve cream garden seats. Upstairs, a junior master suite and bedroom suite open to a roof terrace with Lane Venture rafter chairs. Each of the four second-floor suites has balconies.

A lower level has two additional bedroom suites, a 16-seat theater, bar and recreation room with fireplace and pool table. Energy-efficient and smart-home systems include geothermal HVAC, Control4 technology and Lutron lighting system. The home is equipped with an elevator.

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Manicured grounds include green lawns, mature specimen trees, boxwood parterre, climbing hydrangeas and antique British garden ornaments. There is a heated pool, covered cabana, outdoor fireplace and built-in kitchen. A pool house in the cabana has a full bathroom and dressing room. Stone patios lead to a two-car garage.

Gary DePersia of The Corcoran Group is the listing agent.