15 William Street (William Beaver House)
15 William Street, New York, NY 10005
BBL 1000257501 · BIN 1087954
- Year built
- 2008
- Type
- Condominium
- Units
- 320
- Floors
- 47
- 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
- Requires confirmation
- Pied-à-terre
- Requires confirmation
- Dogs
- Permitted with conditions
- Cats
- Not stated
- Washer/dryer
- Permitted
- Maximum financing
- 90% of the purchase price
- Flip tax
- None
- Doorman
- Full-time doorman
- Flip tax
- None.
- Financing
- Up to 90% financeable (10% minimum down).
- Subletting
- Requires confirmation
- Pied-à-terre
- Requires confirmation
- Washer / dryer
- Permitted (in-unit in every apartment).
- Pets
- Permitted (up to two, with board approval).
- Co-purchasing
- Permitted — co-purchasing, parental purchasing, gifting, guarantors, and diplomats all allowed.
- Managing agent
- RY Management Co.
Compiled by The Roebling Research Desk from the building’s offering plan, amendments, and related building documents (primary source dated 2024). Board policies can change by amendment — confirm at the offer stage.
Every recorded sale at this building, 2008–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $1,227
- floor-adjusted, 12 sales
- Listing discount
- 3.1%
- Recorded sales
- 511
- On record
- 2008–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at William Beaver House 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 William Street (William Beaver House) is André Balazs's only NYC ground-up residential development at the time — a 2008 Tsao & McKown 47-story condominium with cantilevered massing distinguishing the FiDi corridor skyline.
The defining throughline is the André Balazs developer pedigree — a hospitality operator whose broader portfolio runs from the Mercer Hotel and Sunset Tower to Chateau Marmont and the Standard hotels — applied here to ground-up residential. That hospitality sensibility carries into the Tsao & McKown / Ismael Leyva / SLCE architect team, whose Tsao & McKown lobby ranks among the most architecturally distinctive residential interiors of the 2008-era market, and registers on the skyline as the cantilevered massing at the upper floors that sets the building apart from peer FiDi inventory.
Architecture and building operations
Tsao & McKown's 2008 design produced a 47-story cantilevered massing at 528 feet. The building was the only ground-up residential development in FiDi at the time of completion. The cantilevered upper floors distinguish the building from peer rectangular FiDi inventory.
The building entered service as condominium, was partially converted to rental in 2010 by CIM Group, then returned to condominium ownership.
Operations: 24-hour doorman; concierge; fitness center; spa; private screening room; landscaped roof terrace; private storage; ground-floor retail.
Policy framework — verify via The Roebling Research Library
The Roebling Research Library carries the 15 William Street folder with offering plan, house rules, and financials.
- Type: Condominium
- Pets: Permitted under condominium framework
- Pied-à-terre: Permitted
- Subletting: Permitted under condominium procedures
- Financing: Standard condominium LTV
- LLC/trust/foreign buyers: All permitted
- Right of first refusal: Procedural only
Specific policy framework should be verified against the Roebling Research Library's offering plan and house rules at engagement.
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
- None.
Source: The Roebling Research Desk's building record, 2024
Purchase
4 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeeManagement | Paid by Buyer | When With the application | Amount $750 | Refundable Non-refundable |
| Application Review FeeCondo | Paid by Buyer | When With the application | Amount $750 | Refundable Non-refundable |
| Dog FeeConditionalConditions: Only if Applicable | Paid by Buyer | When With the application | Amount $500 per dog | Refundable Non-refundable |
| Background/Credit Check FeePer applicantRequired | Paid by Buyer | When With the application | Amount $25 + Tax per applicant; Background Check Company charges applicant(s) directly using the information provided within the application | Refundable Non-refundable |
Rental or lease
7 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeeManagement | Paid by Tenant | When With the application | Amount $850 | Refundable Non-refundable |
| Application Review FeeBoard | Paid by Tenant | When With the application | Amount $550 | Refundable Non-refundable |
| Dog FeeConditionalConditions: Only if Applicable | Paid by Tenant | When With the application | Amount $500 per dog | Refundable Non-refundable |
| Background/Credit Check FeePer applicantRequired | Paid by Tenant | When With the application | Amount $25 + Tax per applicant; Background Check Company charges applicant(s) directly using the information provided within the application | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Lease DepositAfter Lease Termination | Paid by Landlord | When With the application | Amount $1,000 | Refundable Refundable |
Lease renewal
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Lease Renewal FeeBoard | Paid by Tenant | When With the application | Amount $100 | Refundable Non-refundable |
| Lease Renewal FeeManagement | Paid by Tenant | When With the application | Amount $300 | 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
- Maximum financing
- 90% of the purchase priceUp to 90% financeable (10% minimum down).Source: The Roebling Research Desk's building record, 2024
- Guarantors
- PermittedSource: building management's published schedule, as of October 2026
- Co-purchasing
- Not 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
- Purchase or lease by a corporation
- 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
- Requires confirmationSources differ. Confirm with building management.
- Pied-à-terre ownership
- Requires confirmationSources differ. Confirm with building management.
- 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
- Dogs
- Permitted with conditions2 dogs maximum, 40lb max per dogSource: building management's published schedule, as of October 2026
- Cats
- Not statedThe source permits pets without naming cats.Source: 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
- $906 per room a monthMedian of 36 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges + taxes, per square foot
- $3.24 per square foot a monthMedian of 40 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges alone, per square foot
- $1.38 per square foot a monthMedian of 36 listings since October 2023 that give the annual taxSource: listing records, refreshed October 2026
- Real estate taxes alone, per square foot
- $1.94 per square foot a monthMedian of 36 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
- Elevator
- YesSource: NYC Department of Buildings elevator records
- Amenities noted
- Fitness room, spa, media room, roof deck, storageSource: 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
- $0 (under cap)
- 2030–2034 annual penalty
- $135,569/yr
- Per unit / month range
- $0 – $35
- Modeled exposure split equally across 320 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 data last refreshed September 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the engineer identified conditions requiring monitoring or repair, with repairs due by the deadline stated in the filing. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
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).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City data last refreshed September 2026.
Management & transfer contacts
- Sublet policy
- Requires confirmation
- Pied-à-terre
- Requires confirmation
- Notable fees
- Dog fee $500 per dog; condo sale application fees $750 (building) + $750 (processing)
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 |
|---|---|---|---|---|---|
| Aug 13, 2026 | 15C | 1 BR · 1 BA · 832 sf | $955,000 | $1,148/sf | -4.0% |
| Jul 16, 2026 | 14C | 1 BR · 1 BA · 832 sf | $950,000 | $1,142/sf | -4.9% |
| Jun 30, 2026 | 10G | 1 BR · 1 BA · 850 sf | $825,000 | $971/sf | -2.8% |
| Jun 25, 2026 | 15H | 2 BR · 2 BA · 1,373 sf | $1,445,000 | $1,052/sf | -3.6% |
| Jun 15, 2026 | 21A | 2 BR · 2 BA · 1,325 sf | $1,445,000 | $1,091/sf | -5.9% |
| Jun 3, 2026 | 18AB | 3 BR · 3 BA · 2,116 sf | $2,450,000 | $1,158/sf | -1.8% |
| May 12, 2026 | 14E | 2 BR · 2 BA · 1,300 sf | $1,545,000 | $1,188/sf | -3.1% |
| May 7, 2026 | 21E | 2 BR · 2 BA · 1,300 sf | $1,578,000 | $1,214/sf | -2.9% |
Market read. Most recent trades (2026 to date) cleared a median $1,227/sf (floor-adjusted) across 12 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 3.1% 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 1-00025-7501). 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 William Beaver House, last 36 months
| Size | Leases | Median / month |
|---|---|---|
| Studio | 4 | $4,275 |
| 1 bedroom | 29 | $5,500 |
| 2 bedroom | 10 | $8,225 |
| 3 bedroom | 4 | $8,647 |
47 closed leases, October 2023 to September 2026. Most recent lease September 2026. 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 William Beaver House and nearby.
At the recent median sale of $1.3M (35 sales since 2024), a buyer putting 25% down would pay about $56,724 to close, or 4.4% of the price.
- Mansion tax: $13,000
- Mortgage recording tax: $18,769
- Title insurance: $5,850
- Attorneys, lender, building fees, reserves and filings: $19,105
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
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What to know if you’re buying
The cantilevered upper-floor massing is structurally distinguishing.
The 2008-2010 condo-to-rental-to-condo conversion history should be evaluated during diligence.
Roebling cross-references the offering plan through the Roebling Research Library during diligence — particularly important given the 2010 conversion history.
Comparable buildings
- 20 Pine Street (The Collection) — Armani/Casa 2007; nearby FiDi peer
- 15 Broad Street (Downtown by Starck) — Trowbridge & Livingston 1914 / Starck 2005; nearby FiDi peer
- 1 Wall Street — Walker / Macklowe 2023; nearby FiDi trophy peer
- 88 Greenwich Street (Greenwich Club Residences) — Goldstone 1929 / 2007 conversion; nearby FiDi peer
- 75 Wall Street — Welton Becket 1987 / 2009 conversion; nearby Wall Street 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 Financial District buildings
- 5 Beekman Street (The Beekman Residences) — 2016 condominium
- 8 Spruce Street (New York by Gehry) — 2011 condominium
- 15 Broad Street (Downtown by Starck) — 1914 condominium
- 20 Pine Street (The Collection) — 1928 condominium
- 20 West Street (The Downtown Club) — 1930 condominium
- 21 South William Street — 1927 condominium
The neighborhood
For the full corridor — architecture, transit, and pricing across Financial District — read The Roebling Team Guide to Financial District.
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 William Beaver House?
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