Martha Stewart and her daughter, Alexis, purchased a duplex condo at the Belnord on the Upper West Side for $12.3 million. This comes after selling their West Village triplex for $31 million last year. The Belnord, a redevelopment project, saw its offering price for their unit drop from $18 million to $13 million. The apartment features six bedrooms, a living room with a fireplace, and views of the courtyard. The deal was facilitated by Corcoran’s Richard Ziegelasch. The Belnord, known as the Arconia in “Only Murders in the Building,” has a projected sellout of $1.3 billion, with about half of its units sold.