336 West End Avenue

Boak & Paris worked in brick and limestone here, and the LPC classifies the elevation as Romanesque Revival — a designation worth flagging, because several secondary architectural summaries call the building Art Deco, which is what its 1932 date and its interior detailing would suggest. Both readings describe something real: the massing and ornament are historicist, the apartment planning is of its moment.

Inside, the plans are what a 1932 building on a narrow lot produces — entrance galleries, defined dining rooms, and a high proportion of lines with two exposures because the building is tall relative to its footprint. Line letters run from A through F on most floors, which means roughly six apartments per floor as built; the alteration record shows how much of that has been undone. Department of Buildings filings since 2001 document combinations on the 2nd, 5th, 7th, 8th, 11th, 12th, 15th, 16th and 17th floors, several of them across two lines, and several of them under TPPN 3/97, the city's technical bulletin for apartment combinations. Buyers should expect a mix: original one- and two-bedroom lines alongside three- and four-bedroom combinations that carry two former apartments' worth of windows.

The building is full-service: 24-hour doorman, live-in resident manager, central laundry, bicycle room, and private storage allocated by waitlist. The landscaped roof deck is the amenity that distinguishes it from most of the corridor's stock.

The capital record in city filings is that of a well-maintained prewar house on a regular cycle. Facade and Local Law 11 work appears in 2002, 2004, 2006, 2008, 2011–12, 2014 and 2019–20; the roof was replaced in 2004 and terrace membranes repaired in 2014; the boiler chimney was rebuilt in 2003 and a sprinkler system added to the cellar laundry.

The most consequential recent work is current. Department of Buildings filings on file cover replacement of the heating plant — new dual-fuel low-pressure boilers and burners, a new chimney liner, and two new gas-fired domestic hot water heaters — together with a building-wide gas infrastructure restoration running from the cellar through the 20th floor, including a new master meter and appliance connections. A gas restoration of that scope is a significant, disruptive and expensive project. Any buyer under contract should ask the managing agent directly whether it is being funded from reserves, from the credit facility, or by assessment, and should ask when gas service is expected to be fully restored.

The underlying financing is visible in ACRIS. The corporation moved from a co-op lender to a commercial bank in 2011, consolidated to a larger facility in 2014, and refinanced again in January 2021 with new money and a consolidated first mortgage in the $4 million range, secured additionally by an assignment of leases and rents. In late 2025 a further agreement was recorded involving the successor lender and a rooftop telecommunications tenancy — the building carries antenna income, which is a small but real offset to maintenance and which a buyer's attorney should confirm is under a current lease.

Management-sourced records report a permissive stack by corridor standards: 75 percent maximum financing, pets allowed subject to a weight limit, pied-à-terre permitted, subletting permitted, co-purchase and guarantors considered, and no flip tax. A prewar Upper West Side co-op with 75 percent financing, no transfer fee and a pied-à-terre policy is a wider buyer pool than the corridor average, and it is the single strongest argument for the building against its neighbors.

None of that is published by the corporation. Financing ceilings, post-closing liquidity expectations, sublet seasoning and any restriction on purchases by trusts or limited liability companies are set by the board and change without notice. Get them in writing from the managing agent before you make an offer, and read the proprietary lease and current house rules rather than a listing summary.

Recent sales

Recent transfers at this building, curated by The Roebling Team research desk. 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.

Market read. $/sf is measured on the latest sales with reliable square footage (2025): a median $723/sf across 1 sale. The building has traded as recently as 2026. Median listing discount 2.5% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01167-0061) 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 on co-ops is not officially recorded, figures shown are approximate.

Underwrite the gas and heating-plant project first. It is the largest open item in the building's file. Ask for the board minutes and the current budget, and ask specifically whether an assessment has been levied or is contemplated.

Test the no-flip-tax report. It is a meaningful number on a resale and it is reported rather than documented. Confirm it with the managing agent in writing, and confirm whether the corporation has adopted any capital contribution in its place.

The board package is the transaction. Financing is reported at 75 percent, but a board can approve a purchase at less. Assemble the package for a prewar Upper West Side board: two years of returns, verified liquid assets after closing, reference letters, and a debt-to-income presentation that survives the managing agent's screen before it reaches the directors. Run the Co-op Board Qualification Calculator before you offer.

Landmark status governs the windows. Any exterior work — window replacement included — needs a Landmarks permit and board consent. Price a window replacement into a renovation budget rather than assuming it.

Lead with the policy stack. Financing at 75 percent, pets, pied-à-terre, subletting and no reported flip tax widen your buyer pool against most of the corridor. Say so plainly in the marketing rather than burying it.

Document the combination. If your apartment is a combination, produce the DOB job number and sign-off. Buyers' attorneys ask, and an undocumented combination slows a deal or reprices it.

Time around the capital work. A live gas and heating-plant project is a question every buyer's attorney will ask. Have the managing agent's written answer ready on day one rather than discovering it at contract.

If you're considering 336 West End Avenue, also evaluate:

• 330 West End Avenue — the 1917 co-op immediately south on the same block; converted 1981, a decade after 336
• 320 West End Avenue — Rosario Candela's 1924 co-op at the 75th Street end of the block; the corridor's architectural step-up
• 610 West End Avenue — a 1910 co-op further north on the avenue; older stock, larger prewar layouts
• 498 West End Avenue — a 1911–12 prewar converted to condominium; the condominium alternative on the corridor
• 595 West End Avenue — a 1922–23 prewar converted to condominium in 2007
• 817 West End Avenue — a 1909–10 building converted to condominium in 2007, at the corridor's northern end
• 2138 Broadway — a 1924 co-op one block east; Broadway frontage rather than avenue quiet
• 216 West 76th Street — new-construction condominium on the same side street; the modern alternative
• 235 West 75th Street — prewar converted to condominium a block south