447 East 57th Street

Fifteen stories of red brick over a two-story stone base, mid-block, with a canopied entrance and curved wrought-iron balconies at selected openings. The building carries roughly 71,800 square feet of aggregate residential floor area across twenty-three apartments. The resulting ratio of about 3,100 gross square feet is not an interior apartment measurement or a basis for a Manhattan-wide size ranking; use the current plan and dimensions for the specific residence.

The composition runs from the ground-floor maisonette with its private garden through simplexes and duplexes in the middle floors to full-floor apartments above and the roof-garden penthouse at the top. Combinations have gone in both directions over a century: some original floor-throughs were split, and at least one pair has been recombined. Ceiling heights, room counts and fireplace inventories vary by line and by what a previous shareholder did. The consistent elements are the ones the original specification fixed — oak floors with borders, plaster cornices in the entertaining rooms, wood-burning fireplaces in the principal rooms, and cellar storage for every apartment.

A twenty-three-unit cooperative is a small operating platform, and buyers should read it that way: a doorman-attended lobby, a modest staff, and a maintenance charge that spreads a full prewar building's costs across a very small number of shares. There is no garage, no gym and no amenity program, and none is likely to be added.

Capital work is visible in the DOB record. A penthouse parapet wall was removed and replaced and the south facade repointed under a 2016 filing; roofing was replaced in the same scope. A concrete slab repair at the penthouse roof with roof and flashing work has been carried through approvals from 2025 into 2026, and a heavy-duty sidewalk shed was permitted in August 2026 — so there is active exterior work at the building now. A buyer under contract should ask the managing agent directly what the current facade and roof scope costs, how it is being funded, and whether an assessment is in place or contemplated. No audited financial statements for this cooperative were located in The Roebling Research Library at the time of writing; the corporation's financials, budget, and underlying mortgage terms should be obtained from the managing agent and read by counsel.

Financing: 50 percent maximum. Half the purchase price in cash, before closing costs and before the board's post-closing liquidity expectations. On a building of this size and apartment scale, that is the gate almost every deal turns on.

Flip tax: 2 percent of the purchase price, paid by the seller. A price-based flip tax, not a profit-based one — it is owed whether or not the sale produces a gain.

Board package and interview. Standard cooperative process: a purchase application with a criminal and credit check, financial statement, tax returns, reference letters, and a board interview. The board takes a summer recess in July and August, which is a scheduling fact worth building into any contract timeline — a July contract can easily mean a September interview. Since 2026, New York City Local Law 58 sets the clock on the rest of it: written acknowledgment of an application within fifteen days specifying anything missing, and a decision within forty-five days of a complete application, with one permitted extension of up to fourteen days.

Fee stack (management-sourced, August 2026): purchase application fee $500; criminal and credit check $150 per applicant; recognition agreement fee $500 where applicable; seller's closing fee $750 with a broker or $800 without; estate closing fee $800 with a broker or $850 without; New York State transfer stamp fee of $0.05 per share; sublet application fee $600 plus $150 per applicant for verification; refinance application fee $500.

Not established by the documents reviewed. Pied-à-terre policy, purchases in trust or by an LLC, guarantors, co-purchasing, parental purchases, gifting rules, post-closing liquidity requirements, sublet seasoning and term limits, and the current proprietary lease expiration date. The fee schedule does not answer these questions, and they were not established in the material reviewed; the 50 percent financing cap does not establish the other terms. Get them in writing from the managing agent before you make an offer.

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.

Market read. Most recent trades (2026 to date) cleared a median $797/sf (recorded) across 1 sale. Median listing discount 8.6% 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 1-01369-0016). 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.

The journalist and editor Tina Brown and her husband, the editor Sir Harold Evans, owned the ground-floor maisonette at 447 East 57th Street from 1996 until 2018. The apartment, which had been extended into a triplex across the building's lower floors and included the garden the original 1927 plan set aside, was widely covered in the New York real estate press when they listed and sold it. City Register records confirm the 2018 transfer of the apartment out of their names.

Solve the 50 percent first. Everything else is secondary. Confirm the ceiling in writing, then model the board package around cash at closing plus post-closing liquidity — run the Co-op Board Qualification Calculator before you offer, not after.

Ask about the proprietary lease term. The original leases ran to September 30, 2027. Almost certainly they have been extended; that is routine. But it is a question with a one-line answer, your lender will ask it, and you want the answer before contract rather than during title review.

Ask what the current facade and roof work costs. There is a sidewalk shed permitted in August 2026 and penthouse roof and slab work carried through approvals across 2025 and 2026. Ask for the scope, the contract amount, the funding source, and whether an assessment is in place. In a twenty-three-unit building, a seven-figure exterior project is a large per-share number.

Read the plans, not the description. Eighteen original apartments became twenty-three, and the subdivisions were not uniform. There is no representative floor plan in this building. Look at the actual apartment.

Understand what a small co-op means. Twenty-three shareholders carry the whole building, so any assessment is spread across few owners and there is no amenity income to soften it. Review the current budget, audited statements, debt and any assessments.

Lead with the founding story and the plan. A 1928 Candela cooperative that was built as a cooperative, with its own plan of organization on file, is a genuinely rare thing in Manhattan. So is the guaranteed western garden strip. Both are documented and both survive attorney diligence.

Price the financing ceiling in. Fifty percent maximum financing removes a large share of the buyer pool. That is not a flaw to be argued away in a listing; it is a constraint to be priced. The buyers who clear it are a defined group and they know what the alternatives are on the block.

Disclose the exterior work early. A sidewalk shed is the first thing a buyer sees. Get ahead of it with the scope, the timeline and the funding, and the conversation moves on.

Present the specific floor plan. State verified dimensions and room counts without a citywide size ranking. Market rooms and light, and use the Renovation Cost Calculator honestly if the apartment is unrenovated — Sutton Place buyers do that math themselves.

If you're considering 447 East 57th Street, also evaluate:

• 455 East 57th Street — the immediate cooperative neighbor on the same blockfront
• 433 East 57th Street — prewar co-op a few doors west on the same block
• 419 East 57th Street — the same block, at the First Avenue end
• 411 East 57th Street — postwar co-op alternative on the block
• 2 Sutton Place — Rosario Candela on Sutton Place itself; the architect comparison
• 16 Sutton Place — prewar Sutton Place cooperative with river frontage
• 25 Sutton Place South — the river-facing prestige alternative
• 440 East 57th Street — the larger full-service co-op across the street
• 444 East 57th Street — building directly opposite for comparison
• 434 East 58th Street — small prewar co-op one block north