A 1923 home in Bellport, once owned by a physicist, has undergone a massive renovation, preserving many of its antique features. It is on the market for $2.195 million.

Una Fogarty of development firm Opis Partners and who has a house in Bellport purchased the six-bedroom, 4 1⁄2-bathroom, wood-shingled house last year with the intention of renovating and selling it. She partnered with her husband, architect Chris Fogarty, on the project.

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The home was owned by a physicist with the Brookhaven National Laboratory who died in 2013, and it had been filled with his handwritten journals, Una Fogarty says. Many physicists lived in Bellport in the 1950s and ’60s because of its proximity to the lab.

Fogarty upgraded the plumbing and electrical systems, installed central air conditioning, renovated the kitchen and bathrooms, and converted a sunroom into a master suite. She also replaced moldings, adding an updated version of what had already been there. All of the windows, except for the ones in the kitchen, are original, including a set of windows in the living room that can all be pushed to one side.

“We really did everything to the house, trying to keep what makes an old house wonderful,” Fogarty says.

It is listed with Annie Rohrmeier of Eileen Green Realty.