- Year built
- 2008
- Type
- Condominium
- Units
- 53
- Landmark
- No
- Pets
- Pets permitted under condominium rules
- Subletting
- Permitted under the condominium declaration
- Pied-à-terre
- Allowed
Every recorded sale at this building, 2010–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $2,005
- Listing discount
- 0.0%
- Recorded sales
- 29
- On record
- 2010–2026
Cassa at 66 West 45th Street is a 2008 mixed-use tower combining a boutique hotel with a small set of condominium residences, on a Midtown block between Fifth and Sixth Avenues. For buyers who want a new-construction condominium with hotel-grade services in the center of Midtown — steps from Bryant Park, Grand Central, Rockefeller Center, and the Fifth Avenue retail corridor — the building offers a specific value proposition that the surrounding prewar office stock does not.
The condominium-and-hotel structure is the building's defining feature. Residents benefit from the service infrastructure of an on-site hotel operation, while owning under a condominium declaration that provides the flexibility trophy and pied-à-terre buyers prize: foreign ownership, investment use, subletting, and fast closings. That combination — central Midtown location, hotel services, condominium flexibility — defines the building's buyer pool, which skews toward pied-à-terre owners, investors, and buyers who value service over square footage.
The trade-off is the one common to all condo-hotel programs: the building's daily-life experience blends residential and hospitality activity, and the operating and common-charge structure reflects the shared program. Buyers who want a strictly residential building will find Midtown's other options more suitable; buyers who value the service layer find the program a feature.
Architecture and unit composition
Completed in 2008, the tower is a contemporary Midtown high-rise on a slender footprint, with floor-to-ceiling glazing typical of the era's new construction. The condominium residences sit above the hotel floors within the tower.
With roughly 53 condominium units, the residential component is boutique in scale. Layouts run to efficient one- and two-bedroom configurations suited to pied-à-terre and investor use; in-unit washer/dryers are permitted, a practical amenity in a building of this type. As with any new-construction condominium, buyers should evaluate each unit on its exposure, light, and floor level, all of which drive value within the building.
Building operations
Cassa operates as a condominium within a mixed-use condominium-and-hotel tower. Residents have access to hotel-grade services, and the building's operating structure reflects the shared program. How common charges are allocated between the residential and hotel components, and the building's house rules, are set by the condominium documents; review the financials and declaration during due diligence.
Prospective buyers should review the offering plan and amendments, the most recent condominium financial statements, the budget and reserve picture, and any board minutes during due diligence. In a condo-hotel, the allocation of operating costs and the financial health of the overall program matter to long-term carry; confirm the common-charge and tax picture, the sublet and pied-à-terre terms, and the pet policy in writing before going to contract.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $21,621/yr
- Per unit / month range
- $0 – $34
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.
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 →Recent sales
As a condominium, units at Cassa are priced and evaluated on a price-per-square-foot basis. Within the building, pricing is driven by floor level, exposure and light, and renovation condition; the condo-hotel structure and the building's service program also bear on value and on the buyer pool. Because the residential component is small, individual in-building closings carry significant weight in any pricing analysis.
Buyers and sellers should anchor to recent in-building sales on a per-square-foot basis, adjusted for floor and exposure, and read those against the broader Midtown condominium set. The condo-hotel program means the most relevant comparables are other service-oriented Midtown condominiums rather than purely residential buildings.
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 29, 2026 | U | 584 sf | $1,170,987 | $2,005/sf | off-mkt |
| Apr 29, 2026 | U | 584 sf | $1,170,988 | $2,005/sf | off-mkt |
| Nov 24, 2025 | 31CSponsor Sale | 2 BR · 1 BA · 558 sf | $1,100,000 | $1,971/sf | +0.0% |
| Nov 21, 2025 | U | 584 sf | $1,170,987 | $2,005/sf | off-mkt |
| Nov 21, 2025 | U | 584 sf | $1,170,988 | $2,005/sf | off-mkt |
| Apr 18, 2022 | U39C | 1 BR · 1 BA · 661 sf | $799,000 | $1,209/sf | -36.1% |
| Jul 30, 2018 | 28C | 1 BR · 584 sf | $1,125,000 | $1,926/sf | -4.3% |
| May 23, 2015 | A36 | 2 BR · 1,290 sf | $2,195,000 | $1,702/sf | +0.0% |
Market read. Most recent trades (2026) cleared a median $2,005/sf across 2 sales. Median listing discount 0.0% from the last ask.
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 1-01260-7502) 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
Understand the condo-hotel program. Cassa's residences sit within a mixed-use condominium-and-hotel tower. If you want a strictly residential building, this is not it; if you value hotel-grade services and condominium flexibility in central Midtown, the program is the point.
Confirm the cost allocation. In a condo-hotel, how operating costs and common charges are allocated between the residential and hotel components affects your carry. Review the financials and the declaration.
Condo flexibility is real. Expect 30–45 day closings, foreign-buyer acceptance, and pied-à-terre, investment, and sublet use permitted under the declaration — confirm the current terms.
Model the full carry. Common charges, property taxes, and any program-specific assessments should all be in your underwriting before you make an offer.
What to know if you’re selling
Market to the right buyer pool. Cassa's natural buyers are pied-à-terre owners, investors, and service-oriented Midtown buyers — the marketing should speak to flexibility, services, and location.
In-building comps anchor pricing. With a small residential component, recent in-building per-square-foot closings, adjusted for floor and exposure, are the most reliable pricing evidence.
Closing timelines are condo-fast. 30–45 days from contract to closing is typical and is a selling point for time-sensitive buyers.
Comparable buildings
If you're considering Cassa, also evaluate:
- 175 Fifth Avenue — the landmark Flatiron Building condominium conversion
- 45 East 22nd Street — a full-amenity Flatiron condominium tower
- 21 East 26th Street — a Madison Square-facing condominium
- 23 East 22nd Street — a Madison Square Park condominium
- 15 Union Square West — a landmark condominium conversion at Union Square
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Flatiron — read The Roebling Team Guide to Flatiron.
Considering a move at Cassa?
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 Cassa 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.