90 William Street (Be@William)
90 William Street, New York, NY 10038
Financial District
BBL 1000687502 · BIN 1087755
- Year built
- 1967
- Type
- Condominium
- Units
- 113
- Floors
- 16
- Landmark
- No
- Pets
- Permitted (dogs and cats)
- Subletting
- Permitted under the condominium framework
- Pied-à-terre
- Allowed
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
- $1,206
- Listing discount
- 0.0%
- Recorded sales
- 229
- On record
- 2008–2026
90 William Street — marketed as Be@William — is emblematic of the mid-2000s office-to-residential conversion wave that repopulated the Financial District as a residential neighborhood. The building began as a 16-story office building completed in 1967, and was converted to a 113-unit condominium in 2007 by SDS Procida, the partnership of Mario Procida and Louis Greco, with the conversion designed by Bradford Perkins of Perkins Eastman. It stands at the southeast corner of William and Platt Streets, fronting a plaza just north of the Federal Reserve Bank of New York and a block from the Louise Nevelson Plaza sculptures.
The building trades as an entry-level-to-mid-market Financial District condominium — a liquid, frequently traded building with a meaningful share of investor and pied-à-terre ownership. Because it is a true condominium, apartments are read on a price-per-square-foot basis.
Its appeal is loft-style condominium living with a strong amenity package at an accessible downtown price. The penthouse-level Sky Lounge and roof-deck Sky Terrace, both with outdoor kitchens and entertaining space, anchor the amenity offering, and the building's dense transit access — the Fulton Street complex is a short walk away — makes it a practical downtown base.
Architecture and unit composition
Be@William is a 16-story post-war conversion with loft-style apartments, eight per floor, and a revolving-door entrance. The 2007 conversion preserved the building's essential structure while re-cladding the interiors for residential use, producing 113 studio, one-, and two-bedroom residences with consistent fenestration and, in some units, fireplaces or terraces and balconies.
As a true condominium, apartments are read on a price-per-square-foot basis, with floor, exposure, and outdoor space as the primary pricing variables. The building is a conversion of a 1960s office structure rather than ground-up residential construction, which is reflected in its loft layouts and floor plates.
Building operations
Be@William operates as a full-service condominium: 24-hour doorman and concierge, live-in superintendent, central air, and a strong amenity package. The penthouse Sky Lounge carries billiards, a wet bar and kitchenette, an entertainment room, and an indoor-outdoor fireplace; the roof-deck Sky Terrace adds an outdoor kitchen and wet bar. The building also offers a fitness center, central laundry with in-building washer-dryer access, resident storage, and a bicycle room.
Financing is permitted with a minimum 20 percent down. As a condominium, approvals operate on a right-of-first-refusal basis rather than a co-op board's approve-or-reject discretion, and the building is pied-à-terre- and investor-friendly, with an active rental market alongside sales. As is common with conversions, the building saw a post-conversion sponsor dispute over construction; this is historical rather than a current transaction obstacle, but buyers should review the building's litigation history, engineering reports, and reserve position during due diligence, along with common charges and any assessments.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $56,686/yr
- Per unit / month range
- $0 – $42
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
- Allowed; application processing $250
- Notable fees
- Application fee $750 (sale); closing $350; move-in/out fee $400 + deposit $1,000 each
Recent sales
Because this is a true condominium, apartments are read on a price-per-square-foot basis. Be@William trades as an entry-level-to-mid-market Financial District condominium, with studios, one-bedrooms, and two-bedrooms turning over regularly. Pricing is driven by floor, exposure, and outdoor space. The building's liquidity and its meaningful investor and pied-à-terre ownership base keep transaction volume high.
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 |
|---|---|---|---|---|---|
| Apr 3, 2026 | PHA | 2 BR · 2 BA · 1,406 sf | $1,695,000 | $1,206/sf | -3.1% |
| May 7, 2025 | 4A | 2 BR · 2 BA · 1,156 sf | $1,250,000 | $1,081/sf | +0.0% |
| Dec 5, 2024 | 3F | 1 BA · 845 sf | $768,000 | $909/sf | -2.2% |
| Jul 22, 2024 | 15G | 1 BR · 2 BA · 1,080 sf | $1,060,000 | $981/sf | -1.4% |
| Jun 10, 2024 | 7D | 1 BR · 1 BA · 849 sf | $710,000 | $836/sf | -5.1% |
| May 30, 2024 | 16G | 2 BR · 2 BA · 1,080 sf | $1,050,000 | $972/sf | -8.7% |
| Jul 11, 2023 | 16B | 2 BR · 2 BA · 1,186 sf | $1,325,000 | $1,117/sf | +0.0% |
| Dec 1, 2022 | 14D | 1 BR · 1 BA · 845 sf | $725,000 | $858/sf | -19.3% |
Market read. Most recent trades (2026) cleared a median $1,206/sf across 1 sale. Median listing discount 0.0% from the last ask.
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 1-00068-7502) 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
This is a conversion, and it prices like one. You are buying loft-style condominium units in a 1967 office building converted in 2007. That produces distinctive floor plates and layouts — inspect the specific unit's light, ceiling height, and configuration.
Review the building's history during diligence. As with many conversions, there was a post-conversion sponsor dispute over construction. Confirm it is resolved, and review current engineering reports, board minutes, and the reserve position.
Condominium flexibility is real. Pets, pieds-à-terre, subletting, and investor ownership are accommodated under the condominium framework, with financing to 80 percent. This is part of the building's appeal to a broad buyer pool.
Confirm carrying costs and reserves. Review common charges, any assessments, the reserve position, and recent capital projects. Model the full monthly carry.
Run the numbers on transfer costs. Run pricing through the Mansion Tax Calculator where applicable.
What to know if you’re selling
Lead with the amenities and the flexibility. The Sky Lounge and Sky Terrace, the condominium flexibility, and the accessible downtown price point are the differentiators. Marketing should foreground the amenity package and the loft character.
Floor and outdoor space are your leverage. Because floor, exposure, and outdoor space drive pricing spread, presentation and view documentation materially affect outcome.
Price per square foot against the right comps. Comparable analysis should weight floor, exposure, condition, and outdoor space, and benchmark against the Financial District's other conversion condominiums.
Comparable buildings
If you're considering 90 William Street, also evaluate:
- 130 William Street — Adjaye-designed condominium nearby in the Financial District
- 15 William Street — Tsao & McKown with Ismael Leyva + SLCE Architects's 2008 Financial District condominium
- 20 Pine Street (The Collection) — Armani/Casa-designed Financial District conversion condominium
- 111 Fulton Street — a loft-scale Financial District / Seaport condominium
- Financial District — the broader downtown corridor's conversion and new-development stock
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 Be@William?
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 Be@William 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.