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Buildings·Upper East Side·The Hardenbrook House Condominium·Sold prices

404 East 66th StreetRecorded sales & closing prices

404 East 66th Street, New York, NY 10065

88 recorded closings, 2004–2026. Sortable and searchable below.

Recorded closings
88
Date range
2004–2026
Median $/sf
$898
2026 · adjusted
Listing discount
3.6%
median, from last ask
Price range
$500K – $3.7M
Price shift · median $/sf · constant-quality
Since 2004
▲ +18.7%
10-Year
▼ -7.4%
Since 2022
▼ -4%
1-Year
▼ -1.7%

Change in the building’s median $/sf over each window, adjusted to a constant-quality (average-floor) unit so it reflects price — not which floors happened to sell. (2022 marks the rate-shock inflection.) Like-for-like repeat-sale figures to follow.

As a condominium, 404 East 66th Street trades on a price-per-square-foot basis rather than the price-per-room framing used for co-ops. Pricing here reflects three durable factors: the far-east Lenox Hill location, which sits at a discount to the Park-and-Fifth blocks; the condominium tenure, which typically commands a premium over comparable co-op stock because of financing and subletting flexibility; and the building's postwar layouts, which favor efficient studio-through-two-bedroom configurations over grand prewar proportions.

Buyers should expect per-square-foot values below the trophy condominium corridor and generally in line with, or modestly above, the full-service co-op inventory nearby — with the condo structure and permissive subletting supporting resale liquidity and investor demand. Specific closed prices move with unit line, floor, light, and condition, and should be underwritten against current recorded transfers rather than headline averages.

The complete recorded-sale history for The Hardenbrook House Condominium, compiled from NYC Department of Finance transfer records and verified listing data, then enriched apartment-by-apartment by The Roebling Team research desk. Across sales with a public asking price, the building carries a median listing discount of 3.6% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.

Price per square foot over time

77 sales with a known square footage, by closing date.

$373$2,001$3,629'04'08'12'16'20'24'266H · $629/sf · 20047A · $732/sf · 20043D · $722/sf · 200411C · $911/sf · 20053D · $806/sf · 200511B · $1,052/sf · 20052N · $873/sf · 20053J · $933/sf · 200511GH · $1,287/sf · 20062A · $839/sf · 20067H · $881/sf · 200610K · $926/sf · 20077H · $880/sf · 20075F · $957/sf · 200710L · $850/sf · 20073K · $1,018/sf · 200711D · $1,121/sf · 20085A · $877/sf · 200811A · $1,061/sf · 20086H · $778/sf · 20097D · $732/sf · 201010H · $750/sf · 20109H · $817/sf · 20119D · $800/sf · 20112N · $757/sf · 20117F · $547/sf · 20117E · $805/sf · 20117H · $846/sf · 201110K · $967/sf · 20123K · $982/sf · 20135N · $929/sf · 201410L · $973/sf · 201412A · $996/sf · 20145F · $1,039/sf · 201412B · $1,110/sf · 20152N · $999/sf · 20152G · $1,104/sf · 201512D · $1,154/sf · 2016PHA · $1,246/sf · 20164G · $1,030/sf · 20166M · $1,114/sf · 201712B · $1,261/sf · 201710F · $1,072/sf · 201710D · $970/sf · 20172E · $3,455/sf · 20183K · $1,209/sf · 201811A · $1,140/sf · 20182E · $1,229/sf · 20197J · $1,080/sf · 20196E · $1,186/sf · 20199G · $1,212/sf · 20206E · $1,165/sf · 2021J7 · $1,080/sf · 20219F · $1,039/sf · 20216P · $1,000/sf · 202112J · $915/sf · 202111GH · $1,563/sf · 20216D · $938/sf · 20226D · $946/sf · 202212J · $1,216/sf · 20225H · $937/sf · 202212H · $1,017/sf · 20224G · $1,233/sf · 20227E · $1,038/sf · 20221B · $920/sf · 20233P · $1,007/sf · 20236R · $1,056/sf · 20238D · $992/sf · 202310E · $1,284/sf · 20244E · $1,083/sf · 20244N · $1,000/sf · 20246H · $909/sf · 20242A · $957/sf · 20243H · $744/sf · 20252B · $1,000/sf · 20257C · $1,240/sf · 20251G · $878/sf · 2026
Each dot is one recorded sale with a known interior square footage, plotted by closing date against price per square foot. The line is the median $/sf each year, adjusted to a constant-quality (average-floor) unit — so it reflects price movement, not which floors happened to sell that year. Individual sale prices in the table below are unadjusted — and you can click any dot to jump straight to that sale.
Building average$898/sfevery bar sits above or below this · 0%

The vertical premium

The climb in price per square foot as you rise through the building — light and views included, time-adjusted to today’s market.

Floors 11–15 4 sales
$990/sf+10%
Floors 6–10 12 sales
$910/sf+1%
Floors 1–5 10 sales
$878/sf-2%

Premium by line

What each line’s exposure is worth — its light, outlook, and orientation — measured against the building’s average sale.

Line E 4 sales
$990/sf+10%
Line G 3 sales
$987/sf+10%
Line D 3 sales
$839/sf-7%
Line H 4 sales
$823/sf-8%

Recent closings

The building’s 10 most recent market sales.

DateUnitApartmentPrice$/sfvs. Ask
Mar 16, 20261G1 BR · 1 BA · 877 sf$770,000$878-3.1%
May 21, 20257C500 sf$620,000$1,240-4.5%
Mar 11, 20252B1 BA · 560 sf$560,000$1,000—
Feb 28, 20253H874 sf$650,000$744—
Dec 18, 20242A1 BR · 1 BA · 721 sf$690,000$957-5.3%
Oct 21, 20246H1 BR · 1 BA · 875 sf$795,000$909-11.2%
Sep 20, 20244D$3,702,534—
Jun 28, 20244N1 BR · 1 BA · 700 sf$700,000$1,000-7.9%
Jun 26, 20244E2 BR · 2 BA · 1,200 sf$1,300,000$1,083-13.0%
May 28, 202410E2 BR · 2 BA · 1,180 sf$1,515,000$1,284-2.3%

The retrade record

Lines that have changed hands more than once in the public record — the building’s appreciation arc, apartment by apartment.

6H · 875 sf+45%
$550,000 ($629/sf) 2004 → $700,000 ($778/sf) 2009 → $795,000 ($909/sf) 2024
10E · 1,180 sf+33%
$1,140,000 2023 → $1,515,000 ($1,284/sf) 2024
12J · 732 sf+33%
$670,000 ($915/sf) 2021 → $890,000 ($1,216/sf) 2022
7E · 1,180 sf+29%
$950,000 ($805/sf) 2011 → $1,225,000 ($1,038/sf) 2022
4G · 1,196 sf+20%
$1,232,083 ($1,030/sf) 2016 → $1,475,000 ($1,233/sf) 2022
3K · 550 sf+19%
$560,000 ($1,018/sf) 2007 → $540,000 ($982/sf) 2013 → $665,000 ($1,209/sf) 2018
10L · 750 sf+17%
$625,000 ($850/sf) 2007 → $730,000 ($973/sf) 2014
12H · 600 sf+14%
$535,000 2008 → $575,000 2014 → $610,000 ($1,017/sf) 2022
12B · 518 sf+14%
$575,000 ($1,110/sf) 2015 → $653,000 ($1,261/sf) 2017
2N · 700 sf+14%
$612,500 ($873/sf) 2005 → $530,000 ($757/sf) 2011 → $699,000 ($999/sf) 2015
11A · 750 sf+12%
$765,000 ($1,061/sf) 2008 → $855,000 ($1,140/sf) 2018
3D · 900 sf+12%
$650,000 ($722/sf) 2004 → $725,000 ($806/sf) 2005
2A · 721 sf+10%
$629,000 ($839/sf) 2006 → $690,000 ($957/sf) 2024
5F · 914 sf+9%
$875,000 ($957/sf) 2007 → $950,000 ($1,039/sf) 2014
11GH · 1,360 sf+7%
$1,995,000 ($1,287/sf) 2006 → $2,125,000 ($1,563/sf) 2021
10K · 553 sf+4%
$512,000 ($926/sf) 2007 → $535,000 ($967/sf) 2012
6D · 888 sf+1%
$832,500 ($938/sf) 2022 → $839,900 ($946/sf) 2022
6E · 1,180 sf-2%
$1,400,000 ($1,186/sf) 2019 → $1,375,000 ($1,165/sf) 2021
7H · 875 sf-4%
$770,000 ($881/sf) 2006 → $770,000 ($880/sf) 2007 → $740,000 ($846/sf) 2011

Every recorded sale

Sort any column; filter by unit or keyword. Prices are the recorded transfer amount at the NYC Department of Finance. Every sale sits in one of three states: counted in the building’s medians and trend; shown but excluded as a non-arms-length or nominal transfer; or shown and ⚑ flagged for review — a possible duplicate filing or an extreme $/sf outlier, held out of the statistics pending manual verification rather than allowed to move them.

88 recorded sales
Apartment
Mar 16, 20261G1 BR · 1 BA877$770,000$878-3.1%
May 21, 20257C500$620,000$1,240-4.5%
Mar 11, 20252B1 BA560$560,000$1,000—
Feb 28, 20253H874$650,000$744—
Dec 18, 20242A1 BR · 1 BA721$690,000$957-5.3%
Oct 21, 20246H1 BR · 1 BA875$795,000$909-11.2%
Sep 20, 20244D—$3,702,534——
Jun 28, 20244N1 BR · 1 BA700$700,000$1,000-7.9%
Jun 26, 20244E2 BR · 2 BA1,200$1,300,000$1,083-13.0%
May 28, 202410E2 BR · 2 BA1,180$1,515,000$1,284-2.3%
Oct 31, 20238D1 BR880$873,000$992-8.1%
Sep 15, 20236R1 BA500$528,000$1,056-11.9%
Mar 20, 20233P1 BR · 1 BA720$725,000$1,007-3.2%
Mar 16, 202310E2 BR—$1,140,000—-8.8%
Feb 24, 20231B560$515,000$920—
Dec 16, 20227E2 BR · 2 BA1,180$1,225,000$1,038-2.0%
Dec 7, 20224G3 BR · 2 BA1,196$1,475,000$1,233-6.3%
Jul 19, 202212H5 BR · 1 BA600$610,000$1,017-2.4%
May 26, 20225H1 BR · 1 BA875$820,000$937-3.5%
Apr 11, 202212J1 BR · 1 BA732$890,000$1,216-1.1%
Mar 16, 20226D1 BR · 1 BA888$839,900$946—
Feb 9, 20226D1 BR · 1 BA888$832,500$938—
Dec 23, 202111GH2 BR · 2 BA1,360$2,125,000$1,563-5.6%
Oct 12, 202112J1 BR · 1 BA732$670,000$915—
Sep 17, 20216P1 BR · 1 BA720$720,000$1,000-9.9%
May 12, 20219F1 BR · 1 BA914$950,000$1,039-4.5%
May 10, 2021J75 BR · 1 BA537$580,000$1,080-2.5%
Mar 25, 20216E2 BR · 2 BA1,180$1,375,000$1,165-12.7%
May 18, 20206A1 BR—$850,000—-2.9%
May 6, 20209G1,196$1,450,000$1,212—
Jan 25, 20206D1 BR · 1 BAnon-market transfer (excluded from $/sf & trends)888$560,065——
Dec 10, 20196E2 BR · 2 BA1,180$1,400,000$1,186—
Oct 25, 20196F1 BR · 1 BA—$950,000—-2.0%
Aug 2, 20197J5 BR · 1 BA537$580,000$1,080-16.5%
Jul 24, 20195J5 BR · 1 BA—$639,000—-1.7%
Apr 9, 20192E2 BR · 2 BA1,180$1,450,000$1,229-3.0%
Aug 17, 201811A1 BR750$855,000$1,140-4.9%
May 23, 20183K5 BR550$665,000$1,209-2.1%
Jan 18, 20182E2 BR · 2 BA275$950,000$3,455—
Oct 11, 201710J5 BR · 1 BA—$685,000—-2.0%
Jul 6, 201710D1 BR888$861,000$970-1.6%
Jun 28, 201710F1 BR · 1 BA914$980,000$1,072-1.5%
May 11, 201712B518$653,000$1,261-1.8%
Jan 11, 20176M1 BA458$510,000$1,114-8.6%
Sep 27, 20164G3 BR · 2 BA1,196$1,232,083$1,030—
May 31, 2016PHA850$1,058,980$1,246—
May 2, 201612D1,127$1,300,000$1,154—
Nov 23, 20152G2 BR1,200$1,325,000$1,104-8.6%
May 4, 20152N1 BR700$699,000$999—
Apr 3, 201512B5 BR · 1 BA518$575,000$1,110-5.7%
Dec 9, 20145F1 BR · 1 BA914$950,000$1,039-4.5%
Oct 30, 201412G1 BR · 1 BA—$725,000—-3.2%
Jun 5, 201412H—$575,000—-5.7%
Apr 30, 201412A1 BR · 1 BA720$717,000$996+0.3%
Mar 13, 201410L1 BR750$730,000$973-2.5%
Jan 28, 20145N1 BR · 1 BA700$650,000$929-6.5%
Jul 31, 20133K550$540,000$982—
Jul 20, 201210K1 BR553$535,000$967—
Dec 13, 20117H2 BR875$740,000$846-6.9%
Aug 18, 20117E2 BR · 2 BA1,180$950,000$805—
Aug 10, 20117F914$500,000$547—
Mar 24, 20112N1 BR700$530,000$757-6.2%
Feb 3, 20119D1 BR900$720,000$800-2.6%
Jan 28, 20119H1 BR875$715,000$817-4.5%
May 12, 201010H1 BR900$675,000$750-2.9%
Feb 22, 20107D888$650,000$732—
Oct 19, 20096H1 BR900$700,000$778-6.0%
Oct 7, 200811A1 BR721$765,000$1,061—
Feb 19, 20085A1 BR730$640,000$877-5.7%
Feb 6, 200812H—$535,000—-1.8%
Jan 28, 200811D2 BR1,200$1,345,000$1,121-3.6%
Aug 28, 20073K550$560,000$1,018-4.3%
Jun 29, 200710L1 BR735$625,000$850—
Jun 28, 20075F1 BR914$875,000$957-0.5%
Feb 7, 20077H2 BR875$770,000$880-3.6%
Jan 17, 200710K1 BR553$512,000$926-3.2%
Sep 5, 20067H2 BR874$770,000$881—
Aug 16, 20062A1 BR750$629,000$839-4.6%
May 24, 200611GH2 BR1,550$1,995,000$1,287—
Apr 25, 200611G—$1,875,000——
Jul 7, 20053J536$500,000$933—
Jul 6, 20052N1 BR702$612,500$873—
Jun 30, 200511B5 BR · 1 BA518$545,000$1,052—
Jun 27, 20053D2 BR900$725,000$806+3.7%
May 5, 200511C1 BR823$750,000$911-2.5%
Nov 10, 20043D2 BR900$650,000$722-1.4%
Nov 3, 20047A1 BR750$549,000$732-3.5%
Sep 21, 20046H1 BR874$550,000$629—

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01460-7501) 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 from recorded condo declarations and offering plans. Storage, parking, and commercial units are excluded from all figures. Floor- and line-level $/sf are time-controlled (each sale measured against the building’s going rate at the time of sale) and expressed at today’s pricing, so they isolate the floor or line premium rather than blend two decades of market movement.

Buying or selling at The Hardenbrook House Condominium?

Put this data to work.

Buying here

Know what’s fair before you offer — we’ll show you where each line trades, the building’s discount-to-ask pattern, and where the value sits right now.

Selling here

Price to the building’s real trajectory, not a guess — we’ll position your line against its true comps to maximize the outcome.

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Corey Cohen, Principal · The Roebling Team at Compass
646.939.7375 · c.cohen@compass.com