A 420-square-foot private direct-living terrace, south-facing, half a block from the High Line, in one of West Chelsea's most desirable full-service condominiums. Large private terrace: check. Full-service building: check. The High Line at the end of the block: check.

What makes this unusual is that it is two things at once. Today it is two separate apartments, 1,520 square feet between them, each complete and rentable as it stands - a combined rent roll of roughly $11,000 a month from the day you close. Or you combine them into one home, which is what the terrace is really asking for.

Combined, this becomes a south-facing two-bedroom - three if you want the third - with the terrace opening directly off the living room rather than up a stair or down a hall. There is room for an open kitchen with a breakfast bar, and for a primary bedroom with its own bath and a proper walk-in closet. Two suggested plans are attached; the photographs show the two apartments as they are today.

555 West 23rd Street is a full-service luxury condominium designed by The Stephen B. Jacobs Group with interiors by Andi Pepper, the team behind the Hotel Gansevoort and the Library Hotel. The building has been handsomely renovated, including a redesigned lobby and a new state-of-the-art fitness centre. Residents are attended by a 24-hour doorman and concierge, with a club lounge, a 9,000-square-foot landscaped residents' terrace, dry cleaning, a package room, a renovated laundry room, bike storage, and a garage with valet parking. 24-hour notice to show.

In the heart of the gallery district, with the High Line, the Hudson River Promenade, Chelsea Piers, the Meatpacking District and Hudson Yards all within an easy walk.