Snohetta's glass tower, the tallest condominium on the Upper West Side.

Clinton and Russell's 1908 full-block palazzo with a grand private courtyard, an Upper West Side landmark.

Emery Roth's 1930 twin-towered Central Park West landmark, a coveted co-op address.

Henry Hardenbergh's 1884 gabled landmark on Central Park West, a storied co-op address.

Robert A.M. Stern's limestone tower, the Upper West Side's premier condominium address.

A Selldorf-designed boutique condominium with private parking for every home.

A Jean Nouvel condominium behind a faceted glass facade at Eleventh Avenue and 19th Street.

A boutique Kohn Pedersen Fox condominium set behind a private High Line garden.

A Selldorf-designed boutique condominium with private parking for every home.

A Robert A.M. Stern waterfront condominium with Olson Kundig interiors and Hudson River views.

Bjarke Ingels’ twisting towers where the High Line meets the Hudson.

Thomas Heatherwick’s bay-window towers straddling the High Line.

SoHo's slender, hand-laid brick tower by Cary Tamarkin

Renzo Piano's two-tower glass condominium, the tallest residences in SoHo.

Jean Nouvel's glass-walled condominium on a full SoHo blockfront.

A six-residence, handmade-brick loft building in the heart of SoHo.

Oversized lofts in a former 1912 chocolate factory on Lafayette Street.

Ian Schrager and Witkoff’s Herzog & de Meuron-designed waterfront condominium on the West Village’s Hudson edge, with John Pawson interiors. Recent sales inside.

Starwood and Naftali’s landmarked 1896-warehouse condominium in the West Village, The Shephard, with Gachot interiors and oversized lofts. Recent sales inside.

Witkoff’s COOKFOX-designed brick-and-metal condominium on the West Village waterfront, steps from Hudson River Park. Residences, amenities, and recent sales.