39 West 23rd Street · Flatiron · Condo · Built 2022 · 44 units · 25 stories · COOKFOX Architects
CondoBuilt 2022Pets allowedFull-time
79
MF Score
Flatiron House Condominium — two COOKFOX-designed buildings connected by a planted garden, bringing genuine biophilic design to the heart of the Flatiron District half a block from Madison Square Park.
Flatiron House is the most livability-focused new development in the Flatiron District — and it makes a genuinely different case than the glass supertalls that dominate the neighborhood's skyline.
COOKFOX Architects built this around a simple premise: buildings should make people feel better. The filtered air system, acoustic mitigation, self-watering Juliet balconies, and the central planted garden connecting the Tower and Loft buildings aren't marketing language — they are measurable design decisions that affect daily quality of life. If you have spent time in a well-designed biophilic building you understand the difference immediately.
The two-building structure is unusual and worth understanding before you buy. The Tower faces 23rd Street and has 37 units ranging from one to four bedrooms. The Loft faces 24th Street and has just seven full-floor residences — quieter, more private, and genuinely distinct in character. Buyers who prioritize privacy and quiet should look at the Loft side first.
The location is exceptional. Half a block from Madison Square Park, one block from four subway lines, two blocks from Eataly. This is the center of the neighborhood.
The honest limitation: Flatiron House is a 2022 building and doesn't have the architectural prestige or landmark status of 212 Fifth Avenue or the Flatiron Building itself. At $2,320/sqft average on recent sales, it represents genuine value relative to those buildings while delivering a newer product with better systems. For buyers who care more about how a building makes them feel day-to-day than about address prestige, Flatiron House makes a compelling case.
Pros and cons
Pros
+ Genuine biophilic design — filtered air, acoustic mitigation, and self-watering balconies that measurably improve daily living
+ Central planted garden connecting both buildings — a private outdoor oasis unavailable in any comparable building
+ Half a block from Madison Square Park — the best park in the Flatiron District
+ Four subway lines within one block — best transit access of any building between 14th and 30th Streets
+ Parking available for purchase — exceptionally rare in this neighborhood
+ Zero HPD and DOB violations — spotless public record for a 2022 building
+ Loft building offers seven full-floor residences with direct elevator access — genuine privacy
Cons
− No tax abatement — full NYC property taxes from day one add meaningful monthly carrying costs
− No pool — wellness positioning without the amenity most buyers associate with wellness buildings
− Loft building units are extremely illiquid — seven units means very limited resale comparables
− Juliet balcony plantings require maintenance — inspect actual vegetation condition before closing
− No landmark status — the architecture is distinguished but lacks the heritage value of older conversions
Approx. low end — varies by unit. Use the calculator below to add your mortgage.
~$4,000/mo
Common charges and tax figures shown are sourced from current active listings and vary by unit size and floor. Verify all figures with building management, the offering plan, and your attorney before closing. MeetFlatiron makes no representations as to the accuracy of financial figures shown.
Payment calculator
Purchase price$1,980,000
Down payment20%
Interest rate6.75%
Principal and interest—
Common charges (enter your unit's figure)$/mo
Property taxes (enter your unit's figure)$/mo
Total monthly—
For illustrative purposes only. Common charges and taxes vary by unit — verify exact figures with building management. Actual mortgage rates vary by lender. Consult your lender for accurate rates and terms.
Red flag —
No tax abatement — buyers pay full NYC property taxes from closing day. At this price point this is a meaningful monthly carrying cost that needs to be factored in carefully.
The Loft building's seven full-floor residences are highly desirable but extremely illiquid — with only seven units, resale opportunities will be rare and dependent on one or two transactions setting market comparables. Buyers on the Loft side should have a long investment horizon.
The planted Juliet balconies require maintenance. Some units may have vegetation that was never established or has since died. Inspect the actual condition of exterior plantings before closing — the aesthetic is part of what you are paying for.
What agents won't tell you
Board dynamics
Flatiron House is a condominium — no board approval process, no financial package submission, no interview. Cash buyers, foreign nationals, LLC purchasers, pied-à-terre buyers, and investors face no structural obstacles.
Anbau Enterprises has a strong track record of delivering well-managed boutique buildings. The building is professionally managed and the condo association is well-capitalized from sponsor sales.
What it's actually like to live here
Flatiron House delivers on its biophilic promise in ways that are immediately felt rather than just marketed. The central garden between the Tower and Loft buildings is genuinely usable — a planted, irrigated outdoor space that functions as a quiet retreat in the middle of a dense city block.
The Tower residences on 23rd Street get excellent light and views — upper floors have direct sightlines to the Flatiron Building, Empire State Building, and One World Trade Center simultaneously. The Loft residences on 24th Street are full-floor homes with direct elevator access — more private, quieter, and with a distinct neighborhood feeling.
Kitchens are genuinely high-spec: Calacatta Lincoln marble, Gaggenau and Thermador appliances, Dornbracht fixtures. Bathrooms feature Arabescato marble and walnut vanities. White oak wide-plank floors throughout. This is a building where the finish quality holds up to close inspection.
The self-watering Juliet balconies are a differentiating feature — residents can grow herbs, flowers, or native plants on their balconies with minimal maintenance. In practice, some buyers love this and some find it is more aesthetic than functional. Visit an occupied unit before closing to assess whether the vegetation has actually been maintained.
Services and amenities
Full-time
Elevator
Gym
Roof deck
Outdoor space
Bike room
Storage space
Laundry in building
Live-in super
Parking
Hardwood floors
Central air
Washer/dryer in unit
Dishwasher
Pets allowed
No Pool
Pet policy: Pets permitted — verify breed and weight restrictions with building management.
Amenity information sourced from building listings and public records. Amenities are subject to change — verify current offerings with building management before closing.
Transit
23rd St (Broadway)
NRW
~1 block
23rd St (6th Ave)
FM
~1 block
23rd Street PATH
PATH
~1 block
23rd St (Park Ave South)
6
~3 blocks
23rd St (7th Ave)
1
~4 blocks
Walk Score 99Transit Score 100Bike Score 91Source: Walk Score
Commute times from this building
Destination
🚶 Walk
🚇 Subway
Lines
Madison Square Park (23rd & Fifth Ave)
2 min
N/A
Walk only
Midtown (47th & Park Ave)
33 min
10 min
6 to Grand Central-42 St
Hudson Yards (30th & 10th Ave)
25 min
18 min
Walk or A/C/E
World Trade Center (Fulton St)
55 min
16 min
N/R/W or PATH
Times Square (42nd & Broadway)
27 min
8 min
N/R/W to Times Sq-42 St
Grand Central (42nd & Park Ave)
25 min
10 min
6 to Grand Central-42 St
Door-to-door estimates via Google Maps transit directions. Times reflect typical weekday conditions.Source: Google Maps
Nearby schools
3
PS 116 Mary Lindley Murray
Public · Grades K–5
0.4 mi
8
IS 104 Simon Baruch
Public · Grades 6–8
0.5 mi
9
NYC Lab School
Public · Grades 6–12
0.8 mi
Nearby colleges: Baruch College (0.5 mi), Parsons/The New School (0.4 mi), FIT (0.4 mi), SVA (0.6 mi)
School ratings sourced from GreatSchools and are subject to change. School zone boundaries are not guaranteed — verify current zoning directly with NYC DOE at myschools.nyc before purchasing.
Noise Level
Moderate
Overall noise level
58/100 noise score
Primary source: 23rd Street between Fifth and Sixth Avenues carries moderate traffic. Building's acoustic mitigation systems and biophilic construction significantly reduce interior noise levels. Central garden provides a quiet buffer zone. Upper floors above 15 are substantially quieter.
39 West 23rd Street is one of the safest blocks in the Flatiron District — tucked between Fifth and Sixth Avenues, half a block from Madison Square Park. The 13th Precinct covers this area. The attended lobby provides 24-hour security. The interior garden connecting the two buildings is private and secure.
🚗
Parking
Flatiron House offers parking spaces for purchase — a rare amenity in this neighborhood. If you need parking but don't buy a space with the unit, the nearest public garages are on 24th Street and on Sixth Avenue. Budget $550–$700/month for monthly parking if buying separately.
📦
Storage
Private storage is available for purchase. With 44 total units, storage is limited. Confirm availability and pricing with Corcoran Sunshine before closing — storage often sells alongside the unit at initial purchase and may not be available separately on resale.
🛒
Grocery and daily errands
Eataly at 200 Fifth Avenue is two blocks away — excellent for specialty items but not a weekly supermarket. Whole Foods on 24th Street handles full grocery runs (0.4 mi). Trader Joe's on 21st Street is 0.5 miles. Multiple delis and bodegas on 23rd and 24th Streets for daily basics.
🔊
Noise and street life
Flatiron House's location between Fifth and Sixth Avenues on 23rd Street is quieter than buildings directly on Fifth Avenue. The biophilic design includes acoustic mitigation in the building envelope — filtered air systems and construction materials chosen specifically to reduce noise transmission. The central garden provides a genuine quiet oasis at the building's core. Upper floors above 15 are substantially quieter.
🚇
Getting around
Flatiron House has exceptional transit access — possibly the best of any building in the neighborhood. The N/R/W at 23rd and Broadway, the F/M at 23rd and Sixth Avenue, and the PATH at 23rd Street are all within one block. The 6 train at 23rd and Park Avenue South is three blocks east. You can reach Penn Station in 8 minutes, Grand Central in 10, and the World Trade Center area in under 20 minutes on multiple lines.
No active permits as of April 2026. Source: NYC DOB BIS.
Last DOB inspection: 2026-04-18 — Zero HPD violations. Zero DOB violations. Clean record.
Climate & Flood Risk
Minimal
Flood Risk Level
Zone X — Minimal Flood Risk
FEMA Flood Map Designation
39 West 23rd Street is designated FEMA Zone X — minimal flood risk. Not located in any special flood hazard area. No special flood insurance required for conventional financing.
Source: FEMA Flood Map Service Center (msc.fema.gov)
What to ask before buying
1.What is the current status of the Juliet balcony plantings in the specific unit I am considering — and what maintenance obligations does the owner have for the exterior vegetation?
2.What are the exact common charges and monthly taxes for this unit, and has the building had any special assessments since opening?
3.Is parking available for purchase with this unit, or separately, and what is the current pricing and waitlist status?
4.What is the reserve fund balance and can I see the most recent audited financials for the condo association?
5.For Loft building units: how does the full-floor layout affect noise from neighboring floors, and what sound mitigation is built into the floor/ceiling assembly?
6.What percentage of units are currently owner-occupied versus rented, and what is the building's policy on short-term rentals?
Flatiron House Condominium: Has shown steady performance since sales launched in 2023. Recent closed sales average approximately $2,320/sqft — meaningfully below the trophy buildings on Fifth Avenue but well-supported by location and product quality.
The biophilic wellness angle has proven durable in post-pandemic buyer preferences. Buildings that prioritize air quality, acoustic comfort, and access to nature have consistently outperformed comparable products without those features in the 2022–2025 market.
With 44 total units and the building near sellout, resale inventory will be limited — which generally supports pricing. Average days on market have run approximately 156 days, with an average discount from ask of approximately 4.5% — tighter than many comparable buildings in the neighborhood.
The absence of a tax abatement is worth noting: buyers pay full property taxes from day one. Factor this into your monthly carrying cost calculations carefully before closing.
Past appreciation is not a guarantee of future performance. Real estate values fluctuate. All investment decisions should be made with independent financial and legal advice.
Sale price history
2024
$5.20M avg
8 sales
2023
$3.80M avg
22 sales
Source: NYC ACRIS · Past sales are not indicative of future value.
Building history timeline
2019
Development Announced
Anbau Enterprises announces Flatiron House at 39 West 23rd Street, a two-building biophilic luxury condo development designed by COOKFOX Architects. Offering plan filed with NY Attorney General (CD19-0397).
2021–2022
Construction Completes
Construction wraps on the 25-story Tower (23rd Street entrance) and the shorter Loft building (24th Street entrance), connected by a central planted garden and glass walkway. Ryder Construction serves as general contractor.
2023
Sales Launch
Sales launch with Corcoran Sunshine Marketing Group. 44 total residences — 37 in the Tower and 7 in the Loft — priced from $1.98 million to $13 million. Building quickly attracts buyers drawn to the wellness and biophilic design positioning.
2024–2025
Near Sellout
Flatiron House approaches sellout. As of April 2025, CityRealty reports the building is near sellout with strong resale activity. Most recent recorded sale: Unit 19A closed February 2024 for $12.12 million.
Frequently asked questions
What makes Flatiron House different from other Flatiron condos?
Flatiron House is designed around biophilic principles — the idea that buildings should connect residents to nature and promote wellbeing. Specific features include filtered outside air, acoustic mitigation built into the building envelope, self-watering irrigated Juliet balconies, and a central planted garden connecting the two buildings. COOKFOX Architects, who designed the building, are pioneers in sustainable and wellness-focused residential design. No other condo in the Flatiron District offers this combination of features.
What are the two buildings at Flatiron House?
Flatiron House comprises two architecturally connected buildings. The Tower rises 25 stories at 39 West 23rd Street and contains 37 residences ranging from one to four bedrooms. The Loft is a smaller, more intimate building facing West 24th Street with seven full-floor residences — many with direct elevator access. The two buildings are connected by a central planted garden and a glass walkway.
What is the price range at Flatiron House?
Flatiron House was originally priced from $1.98 million to $13 million. The building is near sellout; current availability is primarily resale. Recent closed sales average approximately $2,320 per square foot. The most recent major sale — Unit 19A — closed in February 2024 for $12.12 million. Contact Corcoran Sunshine or check StreetEasy for current resale listings.
Is Flatiron House a good investment?
Flatiron House has performed well since launch, with average days on market around 156 days and discounts from ask averaging approximately 4.5% — tighter than many comparable buildings. The biophilic wellness positioning has proven durable in post-pandemic buyer preferences. The main investment caveat is the absence of a tax abatement — buyers pay full NYC property taxes from day one, which meaningfully affects monthly carrying costs. For long-term holders who prioritize livability, Flatiron House represents strong value relative to Fifth Avenue trophy buildings.
Does Flatiron House have parking?
Yes — parking spaces are available for purchase at Flatiron House, which is rare in the Flatiron District. Availability and pricing vary; confirm with building management or your broker before closing. The building also has bike storage.
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