436 East 84th Street (Claiborne House)
436 East 84th Street, New York, NY 10028
Yorkville, Upper East Side
BBL 1015630032 · BIN 1050470
- Year built
- 1963
- Type
- Cooperative
- Units
- 94
- Floors
- 11
- Pets
- Pets permitted (with board approval)
- Flip tax
- 2% of sale price, paid by the buyer
Every recorded sale at this building, 2003–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- 1BR median
- $730K
- Recent range
- $485K – $1.1M
- Listing discount
- 3.3%
- Recorded transfers
- 90
436 East 84th Street — Claiborne House, whose cooperative corporation uses the 444 East 84th address for the 436–444 parcel — is a well-run, financially sound full-service Yorkville cooperative with the residential package a primary-home buyer looks for: doorman, concierge, private garage, balconies on many lines, and a settled owner-occupant culture. It is a classic Yorkville co-op, and its value proposition is stability and services at accessible far-eastern Upper East Side pricing.
The building's appeal is fundamentally about full-service, owner-occupied living at Yorkville value. On a tree-lined block between First and York, it offers a 24-hour doorman, concierge, a private residents' garage, and private balconies on many apartments — a service package that competes with far pricier corridors — while its classic co-op rules (restricted subletting, no pied-à-terre) reinforce a stable, resident-first community. For buyers who want a primary home in a serious, well-capitalized building, Claiborne House is a structural fit.
Its reputation for financial soundness is part of the story. The building is known as a well-run cooperative, and its distinctive lending library is a small but telling marker of a community that invests in shared amenity.
Architecture and unit composition
Claiborne House is an 11-story postwar cooperative of roughly 94–95 units, built in 1963 on the 436–444 East 84th Street parcel and converted to cooperative ownership in 1985. The red-brick facade features a canopied entrance, consistent fenestration, private balconies on many lines, discreet through-wall air conditioning, and sidewalk landscaping on a tree-lined block. The architect is not publicly documented.
The apartment mix runs from one-bedrooms through two-bedrooms and larger combined units, with balconied lines a recurring feature. The building's owner-occupant culture is reinforced by its restricted subletting policy and the absence of pied-à-terre ownership.
Building operations
Claiborne House operates as a full-service cooperative with a 24-hour doorman, concierge, live-in superintendent, elevator, a private residents' garage (typically with a waitlist), central laundry room, bike room, and a lending library. It does not have a gym or roof deck.
Financing is capped at 75% (25% minimum down payment). The flip tax is 2% of the sale price, paid by the buyer; this should be confirmed against the current proprietary lease and house rules. Subletting is restricted under classic co-op rules; pied-à-terre ownership is not permitted, while co-purchasing and gifting are allowed. As with any cooperative, board approval and a board interview are required.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $53,570/yr
- Per unit / month range
- $0 – $47
Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the engineer identified conditions requiring monitoring or repair before the next inspection cycle. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
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
Claiborne House trades as a stable, owner-occupied full-service Yorkville cooperative, with value expressed on a per-room and per-share basis. Pricing reflects the far-eastern Upper East Side value equation and the building's primary-home orientation: one-bedrooms and two-bedrooms generally trading from the high five figures per room into the low millions for larger and balconied units. Recent building activity has run around the high-$800s per square foot on average, with balconied and higher-floor lines commanding premiums. As with any cooperative, per-room value is best read within a unit's specific line, floor, exposure, and condition rather than a single building average.
Recent transfers 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 |
|---|---|---|---|---|---|
| Mar 2, 2026 | PHE | 4 BR · 3.5 BA | $2,200,000 | +0.0% | |
| Aug 6, 2025 | 6F | 2 BR · 2 BA | $1,150,000 | +0.0% | |
| Jul 8, 2025 | 6C | 2 BR · 2 BA | $1,150,000 | +0.0% | |
| Feb 28, 2025 | 10B | 1 BR · 1 BA | $757,500 | -2.3% | |
| Nov 5, 2024 | 7B | 1 BR · 1 BA · 850 sf | $730,000 | $859/sf | -3.8% |
| Jun 20, 2024 | 1C | 2 BR · 2 BA · 1,100 sf | $849,000 | $772/sf | -26.7% |
| Apr 3, 2024 | 5H | 1 BA | $490,000 | -3.9% | |
| May 5, 2023 | 2A | 1 BR · 1 BA | $625,000 | -2.2% |
Market read. $/sf is measured on the latest sales with reliable square footage (2024): a median $825/sf across 2 sales. The building has traded as recently as 2026. Median listing discount 2.8% 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 3, 2009 | PH11F | $695,000 |
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 1-01563-0032) 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.
What to know if you’re buying
This is a primary-home building. Restricted subletting and no pied-à-terre reinforce a stable, owner-occupant community — a plus for buyers seeking that, a constraint for investors.
Full-service package at Yorkville value. Doorman, concierge, private garage, and balconies on many lines, at accessible far-eastern UES pricing.
Note the buyer-paid flip tax. The 2% flip tax is a buyer cost here — factor it into your acquisition math and confirm against current house rules.
Financing is capped at 75%. Plan for a minimum 25% down payment and standard post-closing liquidity review.
Board approval and a board interview are required. Build the cooperative timeline into your plan.
What to know if you’re selling
Lead with stability and services. A well-run, financially sound full-service building with a private garage is the marketing story.
Highlight the balcony where you have one. Private outdoor space is a value driver on this corridor.
Set buyer expectations on the flip tax. The 2% buyer-paid flip tax affects buyer math — address it early.
Prepare buyers for the board. A clean board package and realistic financial and use-policy guidance shorten the path to approval.
Comparable buildings
If you're considering 436 East 84th, also evaluate:
- 400 East 84th Street — nearby Yorkville building
- 401 East 84th Street — nearby Yorkville building
- 450 East 83rd Street — nearby Yorkville building
- 525 East 82nd Street (The Mansion House) — nearby Yorkville cooperative
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Upper East Side — read The Roebling Team Guide to Upper East Side.
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.
Considering a move at Claiborne House?
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 Claiborne House 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.