A historical 1928 Mill Neck manse now hosting a designer show house has just been listed for $7.2 million.

Updates to the three-story, 22-room mansion made as part of the Home Is Where the Heart Is event include a high-end kitchen.

advertisement | advertise on newsday

Walker and Gillette designed the more than 13,000-square-foot house for Olympic skater, lawyer and artist Irving Brokaw. The New York architectural firm's projects also included nearby Coe Hall now part of at Planting Fields Arboretum State Historic Park.

The Olmsted Brothers worked on the property's 5.41 hilltop acres overlooking Lake Francis. The lawn landscape includes formal and natural gardens with towering oak, mountain laurel, and a circular fountain. The land borders a 23-acre preserve.

The home has 10 bedrooms, 10 bathrooms and three half-bathrooms as well as a three-car garage, wine cellar and a deeded water view. Architectural details include 12-foot ceilings, an elliptical staircase, eight fireplaces, and arched French doors, according to the listing with Bonnie Devendorf of Daniel Gale Sotheby's International Realty.

More than two dozen designers have decorated the house inside and out as part of the show house, a fundraiser for the Long Island Chapter of the American Heart Association. The event will continue through May 31.

Correction: An earlier version of this story appeared with the wrong photo.