- Year built
- 1870
15 Union Square West is the 1870 Tiffany & Co. flagship cast-iron building wrapped in 2008 dark-glass curtain wall — Carter Horsley calls it "a very handsome, modern, mid-rise, residential building" whose conversion "stripped away the bank's façade to reveal many of the original cast-iron façade elements that are now behind the new dark-glass façades."
The structural identity rests on three features. First, the John Kellum / Charles Lewis Tiffany 1870 cast-iron original — Tiffany occupied through 1905; operated as warehouse, then Amalgamated Bank from 1925. Second, the Eran Chen conversion — Chen at Perkins & Will (later founder of ODA New York) revealed the cast-iron behind a new dark-glass envelope. Third, the two-lane 50-foot lap pool in Aqua-blue Bisazza stone — uncommon amenity infrastructure for a Union Square condominium.
Jason Sheftell (NY Daily News, August 7, 2008) called the redeveloped building "the finest, most complex and maybe even magical new condominium project currently for sale in New York City."
Recent sales
Penthouse 11 + 10B combined into a single residence at $16-17M reported in January 2012 (Katherine Clark, NYDN, via CityRealty). Caroline Wozniacki bought two units in 2011 for $9M (per multiple sources). Pricing has held in $2,500-3,500/sf range; PH-level units have tested $4K+/sf.
What to know if you’re buying
The 1870 Tiffany & Co. flagship cast-iron provenance is real institutional context.
The Eran Chen / ODA New York founder conversion is real architectural-history credential.
The two-lane 50-foot lap pool in Aqua-blue Bisazza stone is structurally distinctive.
The Abigail Michaels Concierge Service is real institutional amenity infrastructure.
The Vincent Wolfe interiors and the bank-vault-door-replica lobby are structurally distinguishing.
The Sheftell "finest, most complex, maybe even magical" review anchors institutional positioning.
Comparable buildings
- One Madison (23 East 22nd Street) — CetraRuddy 2013; nearby Flatiron trophy peer
- The Flatiron Building (175 Fifth) — Burnham 1902 / Sofield 2026; nearby Flatiron trophy peer
- The Whitman (21 East 26th) — Mitchell 2013; nearby NoMad peer
- 34 Gramercy Park East — DaCunha 1883; nearby Gramercy trophy peer
- 50 Gramercy Park North — Lyons 1925 / Schrager 2004; nearby Gramercy trophy peer
The Roebling Team at 15 Union Square West
Corey Cohen · The Roebling Team at Compass 646.939.7375 · c.cohen@compass.com
Sources: CityRealty (Carter Horsley review, building 37261); Wikipedia "15 Union Square West"; nycblogestate.com (September 2008); Christopher Gray, NYT, July 2, 2006; Jason Sheftell, NY Daily News, August 7, 2008; Katherine Clark, NYDN, January 2012; NYC Department of Finance recorded transfers.