15 Union Square West
15 Union Square West, New York, NY 10003
BBL 1008427502 · BIN 1016065
- Year built
- 1870
- Type
- Condominium
- Units
- 36
- Floors
- 12
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
- Leasing by owners
- Permitted
- Pied-à-terre
- Permitted
- Pets
- Pets permitted; species and limits not stated
- Washer/dryer
- Permitted
- Flip tax
- 1% of the purchase price, paid by the buyer
- Doorman
- Full-time doorman
- Financing
- No building-imposed financing cap (condominium); financing is subject to lender underwriting.
- Subletting
- Leasing permitted (condominium); Board/association review applies. Short-term rentals and AirBnB are not permitted.
- Pied-à-terre
- Permitted.
- Washer / dryer
- Permitted in-unit.
- Pets
- Permitted, subject to Board approval.
- Co-purchasing
- Parents purchasing for children permitted.
- Guarantors
- Permitted.
Compiled by The Roebling Research Desk from the building’s offering plan, amendments, and related building documents (primary source dated 2026). Board policies can change by amendment — confirm at the offer stage.
Every recorded sale at this building, 2009–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2025
- $1,317
- floor-adjusted, 2 sales
- Listing discount
- 5.6%
- Recorded sales
- 86
- On record
- 2009–2025
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 15 Union Square West would likely sell for today, what it costs to sell, and what you’d walk away with — reviewed personally against condition, exposures, renovation quality, and the competition actually on the market.
15 Union Square West is the 1870 Tiffany & Co. flagship cast-iron building wrapped in 2008 dark-glass curtain wall.
It begins with the John Kellum / Charles Lewis Tiffany 1870 cast-iron original — Tiffany occupied the building through 1905, after which it served as a warehouse and then, from 1925, as the Amalgamated Bank. Bringing that history back into view is the Eran Chen conversion: Chen, then at Perkins & Will and later founder of ODA New York, revealed the cast-iron behind a new dark-glass envelope. The pairing of nineteenth-century bones and contemporary luxury extends to the amenity layer, where a two-lane 50-foot lap pool in Aqua-blue Bisazza stone sets the building apart from the Union Square condominium field.
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."
Architecture and building operations
Original five-story cast-iron building designed 1869 by John Kellum for Charles Lewis Tiffany (Tiffany & Co.); opened 1870. Tiffany occupied through 1905. Operated as warehouse, then Amalgamated Bank from 1925; after a 1952 fatal accident, façade was stripped and reclad in brick.
Brack Capital Real Estate USA acquired fall 2006 for $80M. Conversion completed 2008 — original cast-iron elements revealed behind new dark-glass façades. Architect: Eran Chen (then at Perkins & Will; later founder of ODA New York). Interior design: Vincent Wolfe.
On the prior bank building, Christopher Gray wrote in NYT (July 2, 2006): "the politest thing to say about the blocky white blob of a building at the south corner of 15th Street and Union Square West is that it is homely." Jason Sheftell (NY Daily News, August 7, 2008): the redeveloped building was "the finest, most complex and maybe even magical new condominium project currently for sale in New York City."
Lobby has replicas of bank vault doors flanking a tufted-leather concierge station; patterned marble floor.
Operations: 24-hour doorman; Abigail Michaels Concierge Service; valet parking; fitness center with two-lane, 50-foot lap pool in Aqua-blue Bisazza stone; central A/C; live-in resident manager. Upper-floor apartments have gas fireplaces; some have wide private terraces.
Policy framework
- Type: Condominium
- Pets: Permitted
- Pied-à-terre: Permitted
- Subletting: Permitted
- Financing: Min 20% down typical
- LLC/trust/foreign buyers: All permitted
- Right of first refusal: Procedural only
Application and transaction fees
Fees below are from building management's published schedule, as of October 2026. They are shown as published, item by item; no total is added because the total depends on the transaction. Deposits are listed apart from nonrefundable charges.
- Terms
- Equal to 1% of the Purchase Price
- Rate
- 1% of the purchase price
- Paid by
- Buyer
Source: building management's published schedule, as of October 2026
Purchase
7 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeeConditional | Paid by Buyer | When With the application | Amount $700 (if broker involved), or $750 (if no broker involved) | Refundable Non-refundable |
| Background Check FeePer applicant | Paid by Buyer | When With the application | Amount $100 per applicant/occupant | Refundable Non-refundable |
| Credit Check FeeConditional · Per applicant | Paid by Buyer | When With the application | Amount $75 per applicant/occupant (LLC required to submit fee for business credit check - if applicable) | Refundable Non-refundable |
| Messenger Fees | Paid by Buyer | When With the application | Amount $65 | Refundable Non-refundable |
| Working Capital ContributionRequired | Paid by Buyer | When With the application | Amount Equal to two (2) months common charges. | Refundable Non-refundable |
| Closing Document Preparation Fee | Paid by Seller | When With the application | Amount $500 | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move In Deposit | Paid by Buyer | When With the application | Amount $1,000 | Refundable Refundable |
Rental or lease
6 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeeConditional | Paid by Tenant | When With the application | Amount $700 (if broker involved), or $750 (if no broker involved) | Refundable Non-refundable |
| Background Check FeePer applicant | Paid by Tenant | When With the application | Amount $100 per applicant/occupant | Refundable Non-refundable |
| Credit Check FeeConditional · Per applicant | Paid by Tenant | When With the application | Amount $75 per applicant/occupant (LLC required to submit fee for business credit check - if applicable) | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move In Deposit | Paid by Tenant | When With the application | Amount $1,000 | Refundable Refundable |
Lease renewal
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Bed Bug Fee | Paid by Landlord | When With the application | Amount $25 | Refundable Non-refundable |
| Lease Renewal Fee | Paid by Landlord | When With the application | Amount $500 | Refundable Non-refundable |
Management updates its schedule without a public filing. The date is when management last updated the page, not when a rule changed. Confirm the current schedule with management before you apply.
Considering an apartment here? Send Corey the listing to discuss the building's costs and purchase requirements.
Own an apartment here? Request an apartment-specific pricing review.
Financing and purchase requirements
- Guarantors
- PermittedSource: building management's published schedule, as of October 2026
- Parent buying for an employed child
- PermittedSource: building management's published schedule, as of October 2026
- Parent buying for a student child
- PermittedSource: building management's published schedule, as of October 2026
Sublet and pied-à-terre policy
A condominium owner leasing a unit and a co-op shareholder subletting are different rules, and a building-wide rule is different from a restriction on one apartment. This is the building's rule; confirm it for the specific apartment.
- Leasing by owners
- PermittedSource: building management's published schedule, as of October 2026
- Pied-à-terre ownership
- PermittedSource: building management's published schedule, as of October 2026
- Short-term rentals
- Not permittedSource: building management's published schedule, as of October 2026
Considering an apartment here? Send Corey the listing to discuss the sublet and pied-à-terre rules for that apartment.
Pets and in-unit washer/dryer
- Pets
- Pets permitted; species and limits not statedSource: building management's published schedule, as of October 2026
- In-unit washer/dryer
- PermittedSource: building management's published schedule, as of October 2026
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Monthly carrying charges in recent sales
- Common charges + taxes, per room
- $2,452 per room a monthMedian of 3 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges + taxes, per square foot
- $4.71 per square foot a monthMedian of 3 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges alone, per square foot
- $2.78 per square foot a monthMedian of 4 listings since October 2023 that give the annual taxSource: listing records, refreshed October 2026
- Real estate taxes alone, per square foot
- $1.93 per square foot a monthMedian of 4 listings since October 2023 that give the annual taxSource: listing records, refreshed October 2026
Common charges plus real estate taxes, combined into one monthly figure the way New York condominium listings show them. Add a mortgage payment for the monthly outlay. The split into common charges and taxes comes from the listings that also give the annual tax, a different sample, so the two lines need not add up exactly to the combined median; a tax abatement can hold taxes below the full amount until it expires. A summary of recorded sales and listings, not a current bill; charges change.
Building staffing and amenities
- Doorman
- Full-time doormanSource: The Roebling Team's building profile
- Concierge
- YesSource: recent listing records
- Live-in superintendent
- YesSource: The Roebling Team's building profile
- Valet
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of Buildings elevator records
- Amenities noted
- Fitness room, pool, garageSource: The Roebling Team's building profile
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent.
Local Law 97
- 2024–2029 annual penalty
- $59,082/yr
- 2030–2034 annual penalty
- $142,802/yr
- Per unit / month range
- $145 – $350
- Modeled exposure split equally across 34 units (the residential count on the city's lot record). Not an assessed amount; condominium owners are typically charged by each unit's common-interest percentage.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City record last verified September 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available FISP filing classified the facade as Safe — no repairs were required at that inspection. Facade inspections run on a fixed five-year cycle; future inspection, repair, and any assessment decisions remain building-specific.
How to read this, and where it comes from
QEWI = Qualified Exterior Wall Inspector — the licensed engineer the city requires to sign the report (the independent expert, not the managing agent).
Penalties shown are amounts DOB assessed against filings on record across 2005–10 to 2020–25. The FISP dataset does not record whether they were paid, contested or remain open, so treat the figure as history rather than a current balance and confirm the building’s standing with the managing agent.
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City record last verified September 2026.
Management & transfer contacts
- Flip tax
- 1% of gross purchase price (Transfer Fee), due from purchaser at closing
- Sublet policy
- Allowed
- Pied-à-terre
- Allowed
- Notable fees
- Working Capital Contribution = 2 months common charges; short-term rentals/AirBnB not allowed
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.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Oct 30, 2025 | 4E | 3 BR · 3.5 BA · 2,670 sf | $4,025,000 | $1,507/sf | -5.3% |
| Jul 3, 2025 | 31 | 2 BR · 2.5 BA · 2,000 sf | $3,850,000 | $1,925/sf | -3.8% |
| Mar 7, 2025 | 4C | 1 BR · 1.5 BA · 1,560 sf | $1,700,000 | $1,090/sf | -20.9% |
| Jul 1, 2024 | 8 | 449 sf | $750,000 | $1,670/sf | off-mkt |
| Mar 8, 2024 | 9 | 2 BR · 2,189 sf | $6,450,000 | $2,947/sf | off-mkt |
| Jan 19, 2024 | 10 | 2,849 sf | $7,600,000 | $2,668/sf | off-mkt |
| Sep 23, 2022 | 2A | 1 BR · 1 BA · 755 sf | $1,480,000 | $1,960/sf | -1.3% |
| Jun 2, 2022 | 29 | 1,963 sf | $4,250,000 | $2,165/sf | off-mkt |
Market read. Most recent trades (2025) cleared a median $1,317/sf (floor-adjusted) across 2 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 5.6% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00842-7502). 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.
Closed rents at 15 Union Square West, last 36 months
| Size | Leases | Median / month |
|---|---|---|
| 2 bedroom | 3 | $25,000 |
3 closed leases, October 2023 to September 2026. Most recent lease January 2026. Based on few leases. Sizes with fewer than 2 leases are not shown. Compiled by The Roebling Team at Compass from closed leases.
What would your apartment rent for?
The figures above are the building's closed leases. Enter your apartment and I'll send you what yours would rent for, from comparable leases at 15 Union Square West and nearby.
At the recent median sale of $3.85M (3 sales since 2024), a buyer putting 25% down would pay about $160,069 to close, or 4.2% of the price.
- Mansion tax: $57,750
- Mortgage recording tax: $55,584
- Title insurance: $17,325
- Attorneys, lender, building fees, reserves and filings: $29,410
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
Keep up with 15 Union Square West and its market
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Notable residents
- Caroline Wozniacki — tennis; bought two units in 2011
Architectural register
Christopher Gray quoted: "blocky white blob… is homely." Sheftell quoted: "the finest, most complex and maybe even magical."
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
Sources: The Roebling Research Library (offering plans, house rules, financial statements, board minutes, internal transaction records); NYC Department of Finance recorded transfers; publicly recorded NYC building data.
More Flatiron buildings
- 12 West 18th Street (The Randolph) — 1885 condominium by Henry Janeway Hardenbergh
- 15 West 24th Street — 1906 co-op
- 14 West 17th Street — 1906 co-op
- 15 West 17th Street — 1907 condominium
- 15 West 20th Street (Altair 20) — 1906 condominium by Lafayette A. Goldstone
- 16 East 17th Street — 1898 co-op
The neighborhood
For the full corridor — architecture, transit, and pricing across Flatiron — read The Roebling Team Guide to Flatiron.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
Considering a move at 15 Union Square West?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
646.939.7375 · c.cohen@compass.com