The Flatiron Building Condos(175 Fifth Avenue)

For buyers, investors, and collectors of architectural significance researching new development in Manhattan, the address is among the most recognized pieces of real estate on Earth. The Flatiron Building at 175 Fifth Avenue offers a residential opportunity New York City has never offered before. Located at the triangular intersection of Fifth Avenue, Broadway, and 23rd Street in Manhattan's Flatiron District, the building has stood here since 1902, has been photographed more than nearly any structure in the United States, and has served exclusively as a commercial office building for its entire 123-year history. It is being converted into just 38 ultra-luxury condominium residences.

Developed by The Brodsky Organization and The Sorgente Group, with interior design by Studio Sofield (the AD100 design firm led by William Sofield), and exterior restoration and new permanent LED lighting by L'Observatoire International, the Flatiron Building condos for sale are the most historically significant new construction NYC residential offering in a generation. Each of the building's 38 residences is unique, a product of the triangular geometry that Daniel Burnham's 1902 Beaux-Arts masterwork imposes on every floor. No two homes share the same plan, orientation, or relationship to the great rooms, exposed steel structures, and enormous south-facing views the building's prow position above Madison Square Park delivers. With three-bedroom residences beginning at $10,950,000, four-bedroom homes from $18,000,000, and a full-floor 21st-floor unit that entered contract in April 2026 at $58,500,000, the Flatiron Building is not competing within the conventional luxury apartments market in Manhattan. It is defining a category of its own: a residence within one of the most famous buildings in the world.

The Flatiron Building Condos for Sale: Inside the Historic Residential Conversion at 175 Fifth Avenue

For 123 years, you could admire the Flatiron Building. You could photograph it, walk past it, point it out to visitors. But you could never live in it.

That changed in 2025. The most recognizable pre-war building in New York City, Daniel Burnham's 1902 Beaux-Arts icon at the convergence of Fifth Avenue and Broadway, is now home to 38 luxury condominiums, marking the first residential use in the building's history.

If you're searching for a trophy residence in Manhattan that no other building can replicate, here's everything you need to know about the Flatiron Building condos at 175 Fifth Avenue:  pricing, amenities, floor plans, and how to secure a private showing.

Ready to tour the Flatiron Building? Contact me today to schedule a private appointment and receive current availability. 

Flatiron Building at a Glance: Key Facts

Why the Flatiron Building Conversion Is a Once-in-a-Century Opportunity

Some buildings compete on height. Others on views, price per square foot, or starchitect pedigree. The Flatiron Building competes on something no new development can manufacture: it is the Flatiron Building.

Completed in 1902 as the Fuller Building, this 22-story, 285-foot triangular landmark operated exclusively as commercial office space for more than a century. After its last tenants vacated in 2019, the building was acquired at auction in May 2023 for $161.5 million by The Brodsky Organization and The Sorgente Group,  the joint venture behind its transformation into ultra-luxury homes.

The milestones since have come quickly:

• September 22, 2025 — The New York State Attorney General accepted the residential offering plan
• March 2026 Scaffolding came down, unveiling the fully restored terra-cotta facade, repaired six-foot cornice, and new permanent LED lighting,  the first nighttime illumination in the building's 123-year history.
• April 2026 —The 21st-floor full-floor residence entered contract at $58.5 million, the building's benchmark transaction to date

The Architecture: Daniel Burnham's Beaux-Arts Masterpiece, Restored

When Daniel Burnham, the Chicago architect behind the Monadnock Building, the Rookery, and the 1893 World's Columbian Exposition master plan, confronted the triangular site where Broadway and Fifth Avenue converge at 23rd Street, most architects would have seen a problem. Burnham saw an icon.

His pioneering steel-frame construction made it possible to build 22 stories on a footprint whose prow tapers to just six feet wide, creating the clothing-iron silhouette that gave the building its name and made it one of the most photographed structures on Earth.

The residential conversion restored the landmark to as close to its 1902 condition as modern techniques allow:

• Thousands of terra-cotta fixtures restored across the glazed terra-cotta, limestone, and brick facade
• 1,000+ windows replaced throughout the building
• The deteriorated six-foot cornice fully repaired at the roofline
• LPC-approved LED lighting by L'Observatoire International bathing the top five floors in warm gold and uplighting the ornamental stonework below

And yes, the famous phrase "23 Skidoo" was born here, coined by police officers dispersing crowds drawn to the wind-tunnel effect at the building's prow on 23rd Street.

The Residences: Studio Sofield Interiors Inside a Living Landmark

AD100 designer William Sofield of Studio Sofield faced the rarest design brief in New York: create 38 luxury homes inside a triangular landmark where no two floor plates are identical.

His approach: let the building lead. As Sofield put it, very few buildings in the world provoke the emotional response the Flatiron does, and his team approached the reimagining with care, respect, and a balance of timeless architecture and contemporary living.

What Sets These Homes Apart

A material palette drawn from the building itself. Natural stone, warm wood, blackened bronze, and marble alongside the building's original iron railings, marble mosaics, and historic metalwork, preserved and incorporated into the residences rather than stripped out.

Exposed steel structure. The 1902 steel skeleton that made the building possible appears within select homes as an architectural feature, balanced against the warmth of stone and wood.

Great rooms of unmatched scale. The triangular geometry produces living spaces no rectangular tower can match — including a great room stretching approximately 77 feet in one upper-floor five-bedroom residence.

Private elevators. Direct, dedicated vertical access to residences —no shared elevator cores.

10-foot ceilings and advanced lighting systems calibrated for exposures that shift across the building's three angled facades.

Rounded Beaux-Arts windows in the primary bathrooms. Original curved-top, terra-cotta-framed window openings preserved within marble bathrooms,  a detail that exists in exactly one building in the world.

Want to see the floor plans? Because every residence is unique, the best way to understand the Flatiron Building is in person. Book your private tour.

Amenities at 175 Fifth Avenue

The Underground Wellness Center

Beneath the building, an inward-facing sanctuary features an 18-meter (approximately 60-foot) swimming pool among the longest residential pools in the neighborhood,  plus a spa treatment room, cold plunge pool, and sauna.

The Mezzanine Piano Lounge

Perched above the lobby with a grand piano and direct views over Madison Square Park, this may be the most architecturally distinctive amenity room in any Manhattan new development, a private-club atmosphere the building's 1902 occupants would recognize.

Full Amenity Suite

• Residents' lounge with kitchenette and bar
• Game room with billiards
• Fitness center
• Bike storage and package room
• A restored Burnham-era lobby preserving the building's historic materials and proportions

Bar Pisellino at the Ground Floor

The first location outside the West Village from James Beard Award winners Rita Sodi and Jody Williams, the duo behind Via Carota, I Sodi, Buvette, and The Commerce Inn, anchors the building's base, putting one of New York's most beloved hospitality teams at residents' front door.

Flatiron Building Pricing: What Do Condos at 175 Fifth Avenue Cost?

The Neighborhood: Madison Square Park, Flatiron & NoMad

Residents of 175 Fifth Avenue live at one of Manhattan's great intersections, directly adjacent to Madison Square Park, 6.2 acres of rotating public art, mature trees, and the original Shake Shack, all stewarded by the Madison Square Park Conservancy.

Within a 10-minute walk:

• Eataly at 200 Fifth Avenue — the 50,000-square-foot Italian food emporium
• Eleven Madison Park — four blocks north
• Gramercy Tavern — two blocks southeast
• The NoMad Hotel dining room
• Union Square Greenmarket — the city's premier farmers market, five blocks south

Subway Access from 175 Fifth Avenue

• N, Q, R — Broadway & 23rd Street (steps away)
• F, M — 6th Avenue & 23rd Street (short walk)
• 6 — 23rd Street & Park Avenue South
• 1 — 23rd Street & 7th Avenue
• C, E — 8th Avenue & 23rd Street
• 4, 5, 6, N, Q, R, W, L, PATH — Union Square, five blocks south

Why Buy at the Flatiron Building?

Buyers comparing trophy properties at 432 Park Avenue, 220 Central Park South, 15 Hudson Yards, or 111 West 57th Street should understand what makes 175 Fifth Avenue categorically different: there is no competing product.

No other 22-story Beaux-Arts triangular landmark at Fifth Avenue and Broadway is being converted into 38 ultra-luxury homes with Studio Sofield interiors, an underground 18-meter pool, a piano lounge over Madison Square Park, and Bar Pisellino downstairs. The Flatiron Building's value isn't contingent on rankings, height, or price per square foot; it's contingent on the building being what it has been since 1902: instantly recognizable, everywhere in the world.

Buildings where history is preserved and inhabited rather than demolished and replaced are the buildings that hold their value and meaning longest.

Frequently Asked Questions About the Flatiron Building Condos

Who developed the Flatiron Building residential conversion?

The conversion was developed by The Brodsky Organization and The Sorgente Group, who acquired the property at a second auction in May 2023 for $161.5 million after a prior $190 million winning bid failed to close. Studio Sofield designed the interiors, SLCE Architects served as executive architect, and L'Observatoire International designed the exterior lighting. Corcoran Sunshine Marketing Group handles sales.

What is the price range at the Flatiron Building (175 Fifth Avenue)?

Three-bedroom residences start at approximately $10,950,000 (from ~3,000 SF). Four-bedroom residences start at $15,500,000, with listed units at $16,000,000 and $18,900,000. Upper-floor five-bedroom units are priced at $48,000,000 and $50,000,000, and the full-floor 21st-floor unit entered contract at $58,500,000 in April 2026. Several residences are being sold off-market; contact a licensed NYC agent for current availability.

How many condos are in the Flatiron Building?

175 Fifth Avenue contains 38 luxury condominiums, 3 commercial units, and 38 storage units, with a total projected sellout of $380,860,000. Because of the triangular geometry, no two homes share the same floor plan. Roughly one-third were in contract or closed as of early 2026.

What amenities does the Flatiron Building offer?

An underground wellness center with an 18-meter pool, spa treatment room, cold plunge, and sauna; a mezzanine piano lounge overlooking Madison Square Park; a residents' lounge with bar; a billiards room; a fitness center; bike storage; and a package room. Bar Pisellino by James Beard winners Rita Sodi and Jody Williams operates at the ground floor.

What subway lines serve the Flatiron Building?

The N, Q, and R at Broadway & 23rd Street are steps away. The F, M, 6, 1, C, and E are all within a 10-minute walk, and Union Square (4, 5, 6, N, Q, R, W, L) is five blocks south.

What is the history of the Flatiron Building?

Designed by Daniel Burnham and opened in 1902 as the Fuller Building, the Flatiron was one of New York's earliest skyscrapers, its triangular shape made possible by pioneering steel-frame construction. It operated as commercial office space for 123 years before its 2023 sale and first-ever residential conversion. The slang phrase "23 Skidoo" originated here, coined by police clearing crowds drawn to the wind-tunnel effect at the building's prow.

My name is Darrell Williams, a licensed Associate Real Estate Broker in New York City. I work with sellers, buyers, and investors throughout Flatiron, Chelsea, Greenwich Village, Gramercy, and throughout Manhattan.

Schedule a Consultation and let's connect.