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Buildings·Flatiron·15 West 20th Street (Altair 20)·Sold prices

15 West 20th Street (Altair 20)Recorded sales & closing prices

15 West 20th Street, New York, NY 10011

46 recorded closings, 2007–2025. Sortable and searchable below.

Recorded closings
46
Date range
2007–2025
Median $/sf
$1,394
2025 · adjusted
Listing discount
1.1%
median, from last ask
Monthly carry/sf
$2.15
≈ $4,855/mo · recent
Price range
$2M – $4.8M
Price shift · median $/sf · constant-quality
Since 2007
▲ +16.8%
10-Year
▼ -9.2%
Since 2022
▲ +4.1%
1-Year
▲ +0%

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.

The complete recorded-sale history for 15 West 20th Street (Altair 20), 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 1.1% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.

Price per square foot over time

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

$434$1,050$1,665'07'10'13'16'19'22'258B · $1,206/sf · 20072A · $1,003/sf · 20074A · $1,037/sf · 20074B · $1,074/sf · 20075A · $1,059/sf · 20078A · $1,183/sf · 20075A · $1,139/sf · 2007PH · $1,469/sf · 20073A · $1,109/sf · 20073A · $1,109/sf · 20077A · $1,138/sf · 20076A · $1,093/sf · 20072B · $1,052/sf · 20076B · $1,140/sf · 20079B · $1,239/sf · 20075B · $1,085/sf · 20073B · $1,096/sf · 20079A · $1,321/sf · 20077B · $1,206/sf · 20073A · $1,262/sf · 20083A · $1,222/sf · 20108B · $1,206/sf · 20102A · $985/sf · 20102B · $947/sf · 20115A · $1,031/sf · 2011COM · $500/sf · 20129B · $1,453/sf · 20124B · $1,180/sf · 20123B · $1,148/sf · 20127A · $1,282/sf · 20128A · $1,134/sf · 20124A · $1,386/sf · 20142B · $1,357/sf · 2014COM · $850/sf · 20144B · $1,599/sf · 20159A · $1,388/sf · 20178B · $1,545/sf · 20175B · $1,475/sf · 2018PH · $1,489/sf · 20183B · $1,378/sf · 20206A · $1,189/sf · 20215A · $1,262/sf · 20213B · $1,249/sf · 20229A · $1,417/sf · 2025
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$1,394/sfevery bar sits above or below this · 0%

Premium by line

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

Line A 3 sales
+0%

Recent closings

The building’s 10 most recent market sales.

DateUnitApartmentPrice$/sfvs. Ask
Nov 25, 20259A2 BR · 3 BA · 2,259 sf$3,200,000$1,417-7.2%
Mar 22, 20223B3 BR · 3 BA · 2,322 sf$2,900,000$1,249-7.6%
Feb 19, 20215A3 BR · 3 BA · 2,259 sf$2,850,000$1,262-8.1%
Feb 17, 20216A3 BR · 3 BA · 2,259 sf$2,685,000$1,189-10.4%
Jul 6, 20203B3 BR · 3 BA · 2,322 sf$3,200,000$1,378+0.0%
Aug 29, 2018PH3 BR · 3.5 BA · 3,223 sf$4,800,000$1,489-12.7%
Aug 1, 20185B3 BR · 3 BA · 2,322 sf$3,425,000$1,475+0.0%
Dec 1, 20178B3 BR · 3 BA · 2,320 sf$3,585,000$1,545-1.8%
Mar 2, 20179A2 BR · 3 BA · 2,259 sf$3,135,000$1,388-4.9%
Jan 13, 20154B3 BR · 3 BA · 2,173 sf$3,475,000$1,599—

The retrade record

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

COM · 4,000 sf+70%
$2,000,000 ($500/sf) 2012 → $3,400,000 ($850/sf) 2014
4B · 2,173 sf+41%
$2,469,256 ($1,074/sf) 2007 → $2,715,000 ($1,180/sf) 2012 → $3,475,000 ($1,599/sf) 2015
4A · 2,259 sf+34%
$2,341,975 ($1,037/sf) 2007 → $3,130,000 ($1,386/sf) 2014
2B · 2,322 sf+29%
$2,443,800 ($1,052/sf) 2007 → $2,200,000 ($947/sf) 2011 → $3,150,000 ($1,357/sf) 2014
8B · 2,320 sf+28%
$2,800,188 ($1,206/sf) 2007 → $2,800,000 ($1,206/sf) 2010 → $3,585,000 ($1,545/sf) 2017
9B · 2,322 sf+17%
$2,876,556 ($1,239/sf) 2007 → $3,375,000 ($1,453/sf) 2012
9A · 2,259 sf+15%
$2,774,731 ($1,321/sf) 2007 → $3,135,000 ($1,388/sf) 2017 → $3,200,000 ($1,417/sf) 2025
7A · 2,259 sf+13%
$2,571,081 ($1,138/sf) 2007 → $2,895,000 ($1,282/sf) 2012
3A · 2,250 sf+10%
$2,494,713 ($1,109/sf) 2007 → $2,494,712 ($1,109/sf) 2007 → $2,650,000 ($1,262/sf) 2008 → $2,750,000 ($1,222/sf) 2010
6A · 2,259 sf+9%
$2,469,256 ($1,093/sf) 2007 → $2,685,000 ($1,189/sf) 2021
2A · 2,259 sf-2%
$2,265,606 ($1,003/sf) 2007 → $2,225,000 ($985/sf) 2010
8A · 2,259 sf-4%
$2,672,906 ($1,183/sf) 2007 → $2,562,500 ($1,134/sf) 2012

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.

46 recorded sales
Apartment
Nov 25, 20259A2 BR · 3 BA2,259$3,200,000$1,417-7.2%
Mar 22, 20223B3 BR · 3 BA2,322$2,900,000$1,249-7.6%
Feb 19, 20215A3 BR · 3 BA2,259$2,850,000$1,262-8.1%
Feb 17, 20216A3 BR · 3 BA2,259$2,685,000$1,189-10.4%
Jul 6, 20203B3 BR · 3 BA2,322$3,200,000$1,378+0.0%
Aug 29, 2018PH3 BR · 3.5 BA3,223$4,800,000$1,489-12.7%
Aug 1, 20185B3 BR · 3 BA2,322$3,425,000$1,475+0.0%
Mar 5, 2018COMnon-market transfer (excluded from $/sf & trends)—$611,320——
Mar 5, 2018COMnon-market transfer (excluded from $/sf & trends)—$611,321——
Dec 1, 20178B3 BR · 3 BA2,320$3,585,000$1,545-1.8%
Mar 2, 20179A2 BR · 3 BA2,259$3,135,000$1,388-4.9%
Jan 13, 20154B3 BR · 3 BA2,173$3,475,000$1,599—
Jul 22, 2014COM4,000$3,400,000$850—
Jun 26, 20142B2 BR2,322$3,150,000$1,357-10.0%
Mar 7, 20144A2 BR2,259$3,130,000$1,386-13.0%
Nov 13, 20128A2 BR · 3 BA2,259$2,562,500$1,134-7.7%
Nov 7, 20127A2 BR2,259$2,895,000$1,282+0.0%
Aug 2, 20123B2 BR · 3 BA2,322$2,665,800$1,148-1.1%
Jul 25, 20124B3 BR · 3 BA2,300$2,715,000$1,180+4.6%
Apr 27, 20129B2 BR2,322$3,375,000$1,453+2.4%
Mar 20, 2012COM4,000$2,000,000$500—
Jun 20, 20115A2 BR · 3 BA2,259$2,330,000$1,031-6.6%
Apr 11, 20112B2 BR2,322$2,200,000$947-4.1%
Jun 30, 20102A2 BR2,259$2,225,000$985-7.1%
Mar 22, 20108B3 BR2,322$2,800,000$1,206-6.5%
Jan 25, 20103A2 BR2,250$2,750,000$1,222—
Sep 3, 20083A2 BR2,100$2,650,000$1,262—
Aug 20, 20077B2 BR2,322$2,800,188$1,206+0.9%
Jul 31, 20079A2 BR · 3 BA2,100$2,774,731$1,321—
Jul 18, 20073B2 BR · 3 BA2,322$2,545,625$1,096+1.8%
Jul 17, 20075B2 BR2,322$2,520,169$1,085+1.8%
Jul 12, 20076B2 BR2,322$2,647,450$1,140-0.1%
Jul 12, 20079B2 BR2,322$2,876,556$1,239+1.8%
Jul 10, 20072B2 BR2,322$2,443,800$1,052-0.3%
Jul 9, 20077A2 BR2,259$2,571,081$1,138-1.1%
Jul 9, 20076A3 BR2,259$2,469,256$1,093+1.8%
Jul 2, 2007PH2 BR2,841$4,174,825$1,469+1.8%
Jul 2, 20073A2 BR2,250$2,494,713$1,109-9.3%
Jul 2, 20073A2 BR2,250$2,494,712$1,109-9.3%
Jun 28, 20075A2 BR · 3 BA2,259$2,392,888$1,059+1.8%
Jun 28, 20078A2 BR · 3 BA2,259$2,672,906$1,183-0.1%
Jun 28, 20075A3 BR · 3 BA2,100$2,392,887$1,139—
Jun 27, 20074B3 BR · 3 BA2,300$2,469,256$1,074+1.8%
Jun 25, 20078B3 BR2,322$2,800,188$1,206-2.6%
Jun 25, 20072A2 BR2,259$2,265,606$1,003-1.5%
Jun 25, 20074A2 BR · 3 BA2,259$2,341,975$1,037+0.0%

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00822-7504) 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.

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