10 Madison Square West

The original building is a substantial early-twentieth-century masonry structure — a William Van Alen design with the heavy, dignified presence of its era. The conversion preserved that character at street level and through the lower floors while raising a contemporary residential tower above, the demolition of a section of the old structure clearing the way for the added height. The lot itself is not designated; the Madison Square North Historic District begins one block north, at West 25th Street.

Inside, Alan Wanzenberg's interiors set the tone: wide-plank white oak floors, beamed ceilings, and large windows throughout, with the tower residences on the upper floors carrying ceilings over 11 feet and direct outlooks across Madison Square Park. The 125 residences range from one- to five-bedroom layouts, including the marquee tower homes that are the building's crown. This is collector-grade product — generous proportions, high-specification finishes, and a park-front position that cannot be replicated.

The building runs as a full-service luxury condominium with one of the deepest amenity programs in the district. A 24-hour doorman, concierge, porter, and live-in resident manager staff the property. The centerpiece is a 10,000-square-foot fully staffed club with a fitness center, a lap pool, yoga and Pilates studios, a spa treatment room, and steam and sauna; a 5,100-square-foot landscaped courtyard garden, a children's playroom, refrigerated lobby storage for fresh deliveries, and bicycle storage complete the suite.

As a condominium, there is no co-op board admission; pets are permitted, and leasing and pied-à-terre ownership are permitted with conditions. Confirm financing and trust or LLC ownership rules in the current declaration, bylaws and house rules.

Recent sales

Recent closings at this building, from The Roebling Research Library. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.

Market read. Most recent trades (2026 to date) cleared a median $2,485/sf (floor-adjusted) across 5 sales. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount 5.1% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00826-7501; each condominium apartment is its own tax lot). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.

This is a trophy purchase, and the variables are the floor, the line, and the park outlook. The tower residences with high ceilings and direct Madison Square Park views are the building's signature product and price accordingly; lower and interior homes deliver the same finishes, club, and address at gentler numbers. The condominium structure means no co-op board interview — purchases run through the condominium's application and right-of-first-refusal process. Pied-à-terre use is permitted and leasing is permitted with conditions; confirm financing rules in the declaration and bylaws.

The amenity club and the park-front position are the durable advantages here; a buyer is paying for the address as much as for the residence. Because a 125-residence building produces a limited number of same-building comparables, the right comparison set extends to the broader top tier of NoMad and Flatiron new-and-converted condominiums — we help build that comparison and read the offering plan, finish condition, and where each line sits on price.

The marketing core is the combination no competitor can fully copy: a William Van Alen building converted to the highest specification, a 10,000-square-foot private club with a lap pool, and a direct Madison Square Park frontage. Those are durable differentiators that distinguish a resale here from anything in the surrounding new-construction stock.

Pricing should benchmark against the top of the NoMad–Flatiron condominium market rather than the neighborhood average, and the listing should lead with the residence's specific outlook — a direct park view is the building's most valuable attribute. With 125 homes, a well-positioned resale benefits only if few comparable units are offered at the same time, so check current inventory before pricing. Condominium resales clear through a right-of-first-refusal rather than a co-op board, giving a faster, more predictable close that appeals to the building's flexibility-minded buyer.

If you're evaluating 10 Madison Square West, these nearby Flatiron and NoMad buildings make a useful comparison set:

• 141 Fifth Avenue — Flatiron condominium nearby
• 175 Fifth Avenue — the Flatiron Building, a few blocks south
• 284 Fifth Avenue — NoMad building on Fifth Avenue
• 45 East 22nd Street — Madison Square Park condominium tower
• 21 East 26th Street — Madison Square Park building
• 23 East 22nd Street — One Madison, a CetraRuddy-designed condominium tower completed in 2013