15 William Street (William Beaver House)
15 William Street, New York, NY 10005
Financial District
BBL 1000257501 · BIN 1087954
- Year built
- 2008
- Type
- Condominium
- Units
- 320
- Floors
- 47
- Flip tax
- None.
- Financing
- Up to 90% financeable (10% minimum down).
- Subletting
- Permitted (12-month minimum lease).
- Pied-à-terre
- Permitted.
- 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
- $1,177
- Listing discount
- 3.0%
- Recorded sales
- 509
- On record
- 2008–2026
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.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $135,569/yr
- Per unit / month range
- $0 – $35
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 before the next inspection cycle. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
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.
See the full facade history →Management & transfer contacts
- Sublet policy
- Not allowed
- Pied-à-terre
- Not allowed
- Notable fees
- Dog fee $500 per dog; condo sale application fees $750 (building) + $750 (processing)
Recent sales
Recent closings at this building, curated by The Roebling Team research desk. Apartment-level facts are independently verified before publishing; sale prices reflect the recorded transfer amount at the NYC Department of Finance.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| 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% |
| Apr 28, 2026 | 9F | 1 BR · 1 BA · 812 sf | $900,000 | $1,108/sf | -3.1% |
| Apr 17, 2026 | 11G | 1 BR · 1 BA · 800 sf | $845,000 | $1,056/sf | -9.1% |
Market read. Most recent trades (2026) cleared a median $1,177/sf across 10 sales. Median listing discount 3.0% 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) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. 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.
What to know if you’re buying
André Balazs's only NYC ground-up residential development is real institutional context.
The Tsao & McKown / Ismael Leyva / SLCE architect team is real institutional context.
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.
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Financial District — read The Roebling Team Guide to Financial District.
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.
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.