The Halsworth (645 West End Avenue)
645 West End Avenue, New York, NY 10025
BBL 1012510062 · BIN 1034102
- Year built
- 1912
- Type
- Cooperative
- Units
- 72
- Landmark status
- Not an individual landmark; in the Riverside-West End Historic District
- NYC Landmarks Preservation Commission records, updated February 2026
- Subletting by shareholders
- Permitted with conditions
- Pied-à-terre
- Permitted with conditions
- Flip tax
- Tiered or formula; see fees
- Doorman
- Full-time doorman
Every recorded sale at this building, 2003–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- 2BR median, 2023–2024
- $2M
- 2 qualifying sales
- Recent range
- $1.6M – $2.9M
- Listing discount
- 3.7%
- Recorded transfers
- 59
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The Halsworth 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.
The Halsworth is one of the West End Avenue prewar apartment houses produced during the avenue's transformative 1910s building boom — a 1912–1913 commission designed by the young Gaetano Ajello, who would go on to design a sequence of admired buildings up and down West End Avenue. Built for the A.C. & H.M. Hall Realty Company, the building takes its name and the "H" worked into its facade from that developer; its 300 West 92nd Street corner address places it squarely in the heart of the West End / Riverside prewar district.
What sets the building apart is the interior. The Halsworth was designed on a grand scale — an elaborate attended lobby with soaring ceilings and marble detailing — yet it holds only 72 apartments, which makes it feel intimate for its size. Inside the residences, the prewar standard is unusually high: ceiling heights of roughly 10 to 12 feet, oak-paneled and beamed dining rooms, stained-glass windows, and decorative moldings throughout. These are the period details buyers cross the avenue to find, and they survive here in unusual concentration.
Within the protected Riverside–West End Historic District, the Halsworth offers buyers authentic 1913 architecture, generous light-filled prewar layouts, a genuine rooftop amenity package, and the relative value that West End Avenue has long carried against the Central Park-facing blocks.
Architecture and unit composition
Ajello's facade is a restrained, well-proportioned prewar composition, the developer's "H" reading as a quiet historical signature across the elevations. Though the building appears massive from the street, the modest 72-unit count produces larger average floor plates than its scale would suggest.
The apartments are arranged in the classic prewar manner — gracious entry galleries, separate dining rooms in the larger lines, and well-scaled principal rooms. The signature interior features are the 10-to-12-foot ceilings, the oak-paneled and beamed dining rooms, the stained glass, and the original moldings. Finish and configuration vary apartment to apartment after a century of individual ownership and renovation.
Building operations
The Halsworth operates as a full-service pre-war cooperative with a resident superintendent. Residents enjoy a landscaped rooftop garden and a rooftop gym/exercise room — amenities richer than most prewar peers of this vintage — along with a bike room and private storage. Subtenants are permitted to use the gym and roof deck, and the bike room is available for a monthly fee billed to the shareholder.
The building's policies are well defined. A 5% flip tax on net profit is paid by the seller (with broker fee, reasonable legal fees, and city and state transfer taxes deductible from the calculation). Pets are permitted subject to board review, with an introduction letter describing the pet required. Subletting is allowed for an initial one-year term plus a single one-year renewal, with a sublet fee of 20% of monthly maintenance. Pied-à-terre purchases are considered case by case. Trusts are permitted with submission of the trust documents for co-op counsel review; LLC and corporate ownership are not allowed, and the building does not permit interest-only mortgages or guarantors. As a building within a designated historic district, exterior alterations are subject to landmark review.
Application and transaction fees
Fees below are from building management's published schedule, as of September 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
- 5% OF NET PROFIT DEDUCTION ALLOWED ARE BROKER FEE, REASONABLE LEGAL FEE, NY STATE TRANSFER TAX, NY CITY TRANSFER TAX)
- Paid by
- Seller
Source: building management's published schedule, as of September 2026
Purchase
11 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Additional Processing FeeConditionalPaid to management | Paid by Buyer | When With the application | Amount $200 if there is a 2nd Applicant or Guarantor | Refundable Non-refundable |
| Application FeePaid to management | Paid by Buyer | When With the application | Amount $700 | Refundable Non-refundable |
| Credit Report FeePer applicantPaid to managementRequired | Paid by Buyer | When With the application | Amount $125 per applicant | Refundable Non-refundable |
| LL58 Compliance FeePaid to management | Paid by Buyer | When With the application | Amount $500 | Refundable Not stated |
| Rush Package Review FeeConditionalPaid to management | Paid by Buyer | When With the application | Amount $500 (if applicable) | Refundable Non-refundable |
| Additional Closing FeeConditionalConditions: WITHOUT a Bank Attorney PresentPaid to management | Paid by Buyer | When At closing | Amount $500, if applicable | Refundable Non-refundable |
| Estate Transfer Additional Closing FeeConditionalConditions: WITHOUT the attorney presentPaid to management | Paid by Buyer | When At closing | Amount $200, if applicable | Refundable Non-refundable |
| Postponement FeeConditionalConditions: Less than 48 Hours' NoticePaid to management | Paid by Buyer | When At closing | Amount $500, if applicable | Refundable Non-refundable |
| Transfer Closing FeePaid to management | Paid by Buyer | When At closing | Amount $300 | Refundable Not stated |
| Trust Transfer Additional Closing FeeConditionalConditions: WITHOUT the attorney presentPaid to management | Paid by Buyer | When At closing | Amount $200, if applicable | Refundable Non-refundable |
| Undertaking FeePaid to management | Paid by Buyer | When At closing | Amount $100 | Refundable Non-refundable |
Sublet
11 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Administrative FeePaid to the building | Paid by Shareholder | When With the application | Amount $250 | Refundable Non-refundable |
| Application FeePaid to management | Paid by Shareholder | When With the application | Amount $650 | Refundable Non-refundable |
| Credit Report FeePer applicantPaid to managementRequired | Paid by Shareholder | When With the application | Amount $125 per applicant | Refundable Non-refundable |
| Credit Report Rerun FeeConditional · Per applicantPaid to management | Paid by Shareholder | When With the application | Amount $100 per applicant (if required for time due) | Refundable Non-refundable |
| Package Resubmission FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $150 (if applicable) | Refundable Non-refundable |
| Rush Package Review FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $500 (if applicable) | Refundable Non-refundable |
| Additional Processing FeeConditionalPaid to management | Paid by Subtenant | When With the application | Amount $200 if there is a 2nd Applicant or Guarantor | Refundable Non-refundable |
| Sublet feeRecurringPaid to the building | Paid by Shareholder | When Upon approval | Amount 20% of monthly maintenance | Refundable Not stated |
Sublet renewal
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Package Resubmission FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $150 (if applicable) | Refundable Not stated |
| Processing FeePaid to management | Paid by Shareholder | When With the application | Amount $250 | Refundable Non-refundable |
| Sublet FeeRecurringPaid to the building | Paid by Shareholder | When With the application | Amount 20% of monthly maintenance | Refundable Non-refundable |
Refinance
8 items
Management's “less refinance” schedule
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Package Resubmission FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $150 (if applicable) | Refundable Non-refundable |
| Processing FeePaid to management | Paid by Shareholder | When With the application | Amount $250 | Refundable Non-refundable |
| Rush Package Review FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $500 (if applicable) | Refundable Non-refundable |
Management's “more refinance” schedule
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application FeePaid to management | Paid by Shareholder | When With the application | Amount $400 | Refundable Non-refundable |
| Credit Report FeePer applicantPaid to managementRequired | Paid by Shareholder | When With the application | Amount $125 per applicant | Refundable Non-refundable |
| Credit Report Rerun FeeConditional · Per applicantPaid to management | Paid by Shareholder | When With the application | Amount $100 per applicant (if required for time due) | Refundable Non-refundable |
| Package Resubmission FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $150 (if applicable) | Refundable Non-refundable |
| Rush Package Review FeeConditionalPaid to management | Paid by Shareholder | When With the application | Amount $500 (if applicable) | Refundable Non-refundable |
Alteration
2 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Building Service FeeRecurringPaid to the building | Paid by Resident | When Upon approval | Amount Month 1 - $250; Month 2 - $250; Month 3 - $500; Month 4 - $500; Each month thereafter $1000 | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Alteration Security DepositPaid to the building | Paid by Resident | When Upon approval | Amount Decorative $1000, Standard $1000, Major $5000 | Refundable Refundable |
Ownership transfer
7 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Credit Report FeePer applicantPaid to management | Paid by Buyer | When With the application | Amount $125 per applicant | Refundable Non-refundable |
| Estate TransferConditionalPaid to management | Paid by Buyer | When With the application | Amount $250 if applicable | Refundable Not stated |
| LL58 Compliance FeePaid to management | Paid by Buyer | When With the application | Amount $500 | Refundable Not stated |
| Name change/spouse add/removalConditionalPaid to management | Paid by Buyer | When With the application | Amount $250 if applicable | Refundable Not stated |
| Transfer into a TrustConditionalPaid to management | Paid by Buyer | When With the application | Amount $500 if applicable | Refundable Not stated |
| Transfer to a Family Member and a Third PartyConditionalPaid to management | Paid by Buyer | When With the application | Amount $500 if applicable | Refundable Not stated |
| Closing Fee for all TransfersPaid to management | Paid by Buyer | When At closing | Amount $850 | Refundable Not stated |
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
- Guarantors
- Not permittedSource: building management's published schedule, as of September 2026
- Co-purchasing
- Permitted with conditionsCase to case- all applicant must submit all the requirements.Source: building management's published schedule, as of September 2026
- Parent buying for an employed child
- Permitted with conditionsCase to case- all must submit the requirementsSource: building management's published schedule, as of September 2026
- Parent buying for a student child
- Not permittedSource: building management's published schedule, as of September 2026
- Purchase or lease by a corporation
- Not permittedSource: building management's published schedule, as of September 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.
- Subletting by shareholders
- Permitted with conditionsA SHAREHOLDER MAY SUBLET. HIS/HER APARTMENT FOR A PERIOD OF ONE (1) YEAR, AND MAY SEEK A SINGLE EXTENSION OF THAT SUBLEASE FOR A MAXIMUM OF A ONE (1) YEAR PERIOD WITH A SUBMISSION OF A RENEWAL APPLICATION FOR BOARD APPROVAL. SUBLET FEE of 20% of monthly maintenance see fee list below.Source: building management's published schedule, as of September 2026
- Pied-à-terre ownership
- Permitted with conditionsCase to case basisSource: building management's published schedule, as of September 2026
- Short-term rentals
- Not permittedSource: building management's published schedule, as of September 2026
Considering an apartment here? Send Corey the listing to discuss the sublet and pied-à-terre rules for that apartment.
Monthly carrying charges in recent sales
- Maintenance, per room
- $594 per room a monthMedian of 3 recorded sales since October 2023Source: recorded sales, refreshed October 2026
Maintenance as recorded with each sale. A co-op's maintenance already covers the building's real estate taxes and the building's own mortgage, if it has one; add your own loan payment for the monthly outlay. A summary of recorded sales, not a current bill; charges change.
Building staffing and amenities
- Doorman
- Full-time doormanSource: recent listing records
- Concierge
- YesSource: recent listing records
- Live-in superintendent
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of City Planning records (PLUTO)
- Amenities noted
- Fitness room, roof deck, garden, bike storage, 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
- $0 (under cap)
- Per unit / month range
- —
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 →Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the inspector (QEWI) 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 — a licensed professional engineer or registered architect who meets DOB’s FISP qualifications and signs the report (the independent expert, not the managing agent).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City data last refreshed October 2026.
Management & transfer contacts
- Flip tax
- 5% of net profit (deductions: broker fee, legal, NYS/NYC transfer tax)
- Sublet policy
- 1 year + single 1-year extension; sublet fee 20% of monthly maintenance; no guarantors
- Pied-à-terre
- Case-by-case basis
- Policies and fees
- Co-op. App fee $700; credit $125/applicant; transfer closing $300; alteration deposit $1,000-$5,000 + building service fee. No LLC/corporate, no interest-only mortgages
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 |
|---|---|---|---|---|---|
| Jun 22, 2026 | 2A | 3 BR · 2.5 BA | $2,865,000 | -4.3% | |
| Nov 25, 2025 | 9C | 3 BR · 3 BA · 1,500 sf | $1,600,000 | $1,067/sf | -3.0% |
| Jul 18, 2024 | 10D | 2 BR · 2.5 BA · 1,600 sf | $1,995,000 | $1,247/sf | +0.0% |
| Sep 21, 2023 | 10F | 2 BR · 2 BA · 1,600 sf | $1,995,000 | $1,247/sf | -7.2% |
| Mar 10, 2022 | 2F | 2 BR · 2 BA | $1,635,000 | -0.9% | |
| Jan 14, 2022 | 5D | 3 BR · 3 BA | $2,325,000 | +3.3% | |
| Jan 12, 2022 | 12D | 2 BR · 2.5 BA | $1,999,999 | +0.3% | |
| Dec 30, 2020 | 12C | 2 BR · 3 BA | $1,352,400 | -28.6% |
Market read. $/sf is measured on the latest sales with reliable square footage (2025): a median $1,011/sf (floor-adjusted) across 1 sale. The building has traded as recently as 2026. Median listing discount 1.6% 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.
Other recent transfers
| Date | Unit | Price |
|---|---|---|
| Dec 9, 2009 | 9D | $1,495,000 |
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 1-01251-0062). 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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What to know if you’re buying
The prewar interiors are the building's selling point. Ten-to-twelve-foot ceilings, oak-paneled dining rooms, and stained glass are rare survivors — a genuine quality-of-life differentiator versus thinner postwar stock.
The rooftop amenities are a real draw. A landscaped roof garden and rooftop gym are notable for a 1913 building, and they extend to subtenants as well as owners.
The financing and ownership rules are strict. Plan for a maximum mortgage with no interest-only structures, no LLC or corporate purchases, and a board that reviews trusts and pied-à-terre requests individually.
Budget the 5% flip tax into your resale math. It is paid by the seller on net profit, with standard deductions allowed.
What to know if you’re selling
The Ajello authorship and the period interiors are marketing assets. Listing copy should foreground the architect's reputation on West End Avenue, the soaring ceilings, the oak-paneled dining rooms, and the rooftop garden and gym.
Account for the 5% net-profit flip tax. It is a meaningful seller cost; price and net-proceeds conversations should reflect it from the outset.
Pricing requires apartment-level comparable analysis. With 72 units in mixed prewar configurations, floor, exposure, and renovation history drive value more than building averages.
Closing timelines are co-op standard. Plan for roughly 6–10 weeks from contract signing to closing.
Comparable buildings
If you're considering The Halsworth, also evaluate:
- 670 West End Avenue — nearby West End Avenue prewar co-op
- 680 West End Avenue — nearby West End Avenue prewar peer
- 685 West End Avenue — nearby West End Avenue building
More West End Avenue buildings
- 610 West End Avenue (The Evanston) — 1910 co-op by George and Edward Blum
- 617 West End Avenue — 1925 co-op by Schwartz & Gross
- The Arbutus, 639 West End Avenue — 1927 co-op by Gronenberg & Leuchtag
- 650 West End Avenue — 1917 condominium by Schwartz & Gross
- 670 West End Avenue — 1926 co-op by George and Edward Blum
- 675 West End Avenue — 1925 co-op by George F. Pelham
The neighborhood
For the full corridor — architecture, transit, and pricing across West End Avenue — read The Roebling Team Guide to West End Avenue.
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.
Considering a move at The Halsworth?
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