Spring House Hunt

Luxury Home of the Week: A South Boston penthouse with floating stairs for $4.6 million

The home has four bedrooms, 3.5 baths, and two fireplaces. See inside this and other luxury listings at realestate.boston.com.

The penthouse at 100 A St. in South Boston has floating stairs to a private deck. Justin Anfuso

A penthouse with glass walls, three private outdoor spaces, a floating staircase, and voice-activated smart-home technology has entered the market for $4,600,000.

Floor-to-ceiling windows span the length of the top unit at 100 A St. — a new South Boston condo building of nine open-design homes — but automated blinds ensure that natural light won’t ever be a nuisance.

Take an elevator directly to the penthouse. Ricardo Rodriguez of Coldwell Banker Residential Brokerage is the listing agent for the 3,801-square-foot home, which has four bedrooms, 3.5 baths, and two fireplaces. Floating stairs lead to the roof deck. There is also a private deck and a balcony.


A 15-foot island with quartz countertops and a sink is the focal point of a kitchen with high-end stainless-steel appliances and a built-in coffee station.

The master bedroom offers a walk-in closet with custom cabinetry and a window.

The unit comes with two spots in the heated garage and additional storage space, and the Broadway T stop is less than a five-minute walk away.

See more photos of the home below:

100 A St.

100 A St. Justin Anfuso

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