Manhattan’s One Madison redevelopment approaches full leasing

Sigma Computing expands footprint at building

One Madison Ave. in Manhattan is 93.3% leased. (CoStar)

CoStar News

November 6, 2025 | 11:11 P.M.

SL Green Realty’s top-tier One Madison Avenue is approaching fully leased status more than two years after its redevelopment was completed.

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