- Year built
- 1903
- Type
- Cooperative
- Amenities
- Keyed elevator, virtual doorman, common roof deck, bicycle room and storage
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
- Doorman
- Virtual doorman
The E. F. Caldwell & Co. Building sales history: 17 recorded sales
Every recorded sale at this building, 2005–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $835
- floor-adjusted, 1 sale
- Listing discount
- 0.0%
- Recorded sales
- 17
- On record
- 2005–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The E. F. Caldwell & Co. Building 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.
40 West 15th Street was built for a business whose work was lighting itself. E. F. Caldwell & Co. made electric fixtures and ornamental metalwork, leasing premises on this stretch of West 15th Street. The present six-story loft building was designed by D'Oench & Yost for the Van Buren estate, which leased it to the firm for ten years when construction was announced in 1903.
The cooperative retains large industrial floor plates behind that commercial exterior. Its thirteen residences include substantial single-level lofts, lower duplexes and penthouse homes with outdoor space. Exposed columns, beams and brick remain visible in selected apartments.
Architecture and unit composition
The original construction occupied a plot approximately fifty feet wide and just over one hundred feet deep. That width permits broad living areas, while the six-story height keeps the building comparatively low within this part of the loft district.
Typical lofts approach 2,000 square feet, with some larger plans exceeding that figure. Two- and three-bedroom arrangements have evolved through individual renovations. Open living and dining rooms, large windows and high ceilings are recurrent features, but partitions and kitchen locations differ between homes.
Lower duplexes include additional space beneath the main living level and can connect to a private patio. Upper homes include skylights and balconies or terraces. Some retain cast-iron columns and exposed structural steel, while newer renovations conceal or incorporate portions of the original fabric. Central air conditioning and in-unit laundry appear in renovated apartments.
Building operations
A keyed elevator serves the residences, and a virtual doorman system handles entry remotely. The common roof deck is landscaped and furnished, while bicycle storage and storage provide separate space for belongings.
Policy framework
Financing: Up to 80% — confirm with the managing agent.
Building staffing and amenities
- Doorman
- Virtual doormanSource: The Roebling Team's building profile
- Virtual or video entry
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of City Planning records (PLUTO)
- Amenities noted
- Roof deck, bike 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. Outdoor space, parking and some facilities can belong to particular apartments or to a separate owner; confirm access for the specific apartment.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $4,395/yr
- Per unit / month range
- $0 – $28
- Modeled exposure split equally across 13 units (the residential count on the city's lot record). Not an assessed amount; co-op shareholders are typically charged by share allocation.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City data last refreshed October 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Recent sales
Recent transfers 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 |
|---|---|---|---|---|---|
| Apr 23, 2026 | 1C | 2 BR · 1 BA · 1,750 sf | $1,499,000 | $857/sf | +0.0% |
| Aug 15, 2023 | 2A | 2 BR · 2 BA | $2,150,000 | +2.4% | |
| Jun 9, 2021 | 6B | 2 BR · 2 BA · 2,000 sf | $2,500,000 | $1,250/sf | +2.0% |
| Dec 7, 2018 | 4A | 3 BR · 2 BA · 2,100 sf | $2,750,000 | $1,310/sf | +0.0% |
| May 15, 2017 | 6A | 3 BR | $3,325,000 | +5.6% | |
| Aug 25, 2016 | 3B | 2 BR · 2,000 sf | $2,750,000 | $1,375/sf | +0.0% |
| Jul 27, 2015 | 1A | 3 BR | $2,450,000 | -2.0% | |
| Dec 23, 2013 | 4B | 3 BR · 2,000 sf | $2,100,000 | $1,050/sf | -6.7% |
Market read. Most recent trades (2026 to date) cleared a median $835/sf (floor-adjusted) across 1 sale. 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 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 1-00816-0063). 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 on co-ops is not officially recorded, figures shown are approximate.
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Comparable buildings
- 29 West 15th Street — A small cooperative in an early-twentieth-century commercial loft building on the same street.
- 30 West 15th Street — A taller loft conversion with broad floor plates and a larger cooperative inventory.
- 40 West 17th Street — A Schwartz & Gross Beaux-Arts commercial building converted to cooperative lofts.
- The Kensington — A prewar cooperative with a carved classical façade and a limited number of residences.
- La Fabrique — A later commercial-loft cooperative with a similarly small ownership scale.
More Flatiron buildings
- 36 East 22nd Street (The Story House) — 1901 condominium by Stephen B. Jacobs Group
- 39 West 23rd Street — condominium by COOKFOX Architects
- 40 East 19th Street — 1904 co-op
- 40 West 17th Street — 1909 co-op by Schwartz & Gross
- 40 West 22nd Street — 1909 co-op
- 40 West 24th Street — 1905 co-op
The neighborhood
For the full corridor — architecture, transit, and pricing across Flatiron — read The Roebling Team Guide to Flatiron.
The full playbook — what goes in the package, how boards read your financials, the interview, and the timeline — plus sample cover, reference, and personal letters you can adapt.
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.
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646.939.7375 · c.cohen@compass.com