RealtyLens
for saleRealtyLens property overview
$6,495,000

439 W 21st St Unit 12345

New York, NY, 10011
View more New York, NY property pages
7Beds
7Baths
4,175Sqft
$1556$/sqft

Listing Notes

For sale is a luxury multi-family townhouse that includes five studios and a triplex with two bedrooms and one and a half bathrooms. This property is located on one of the most exquisite blocks in Chelsea, surrounded by charming historic landmark houses.Situated in a prime location between Ninth and Tenth Avenue, this property is considered a prestigious asset in highly sought-after West Chelsea. Nestled on a serene tree-lined street, it offers a tranquil setting. The townhouse enjoys close proximity to several notable Chelsea attractions, including Chelsea Piers, the High Line, and the world-renowned Chelsea Market.Currently, the layout comprises two studios with market rates, two occupied rent-stabilized units, and one vacant rent-stabilized studio that could potentially be combined with the free market triplex. Additionally, the property boasts a 35-foot-deep private rear yard, providing a delightful outdoor space.This property presents a compelling opportunity for both investors and end-users due to its strong rental cash flow and various value-add features:Development potential utilizing the unused air rights to construct an additional 1.5 stories.A garden floor triplex with high-end renovations, offering an excellent live-in plus income opportunity.Potential for future conversion into a single-family residence.It comprises a total floor area of 4, 175 square feet and features six units in total, including five studios and one triplex. The rear yard spans 740 square feet, providing ample outdoor space. Moreover, the property has 1, 135 square feet of available air rights for potential future development. The lot dimensions measure 1983, while the building dimensions are 1944.

Market Insights

Below nearby median-29%

$1556/sqft vs a nearby median of $2204/sqft.

Nearby median$2204/sqft
Nearby properties12
Property size4,175 sqft
  • -29% versus the nearby median price per square foot.
  • Price history is limited, so current comps matter more than trend alone.
  • 4,175 sqft creates a usable price-per-square-foot read.

Pricing Read

Yardstick fair value$9.43M$8.58M$10M · 50% confidence
vs ask $6.50M−$2.94M (−45.2%)

Asking price is about 45.2% below the fair value — likely to draw competing offers if it's still on market.

$2,204/sqft median across 11 tight comps × 4,175 sqft= $9.20M
  • Pre-war character+$230k +2.5%
  • Transit access+$46k +0.5%
  • Visible condition issues−$46k −0.5%
Cumulative NYC adjustments+$230k+2.5%

Property Read

FreshnessCurrent market data

The listing facts are current enough for an initial property review.

Market Position-29% vs nearby

The asking price per square foot is below the nearby median, which can be worth a closer comp check.

Price MovementInitial price point

Price history is still limited; review again as more market activity becomes available.

Diligence Read4 items to check
AI ReadinessReady to analyze
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Generated from the facts shown on this page and nearby market data. Not a professional appraisal.

Listing Details

Days on market
6 days
Last price change
No change recorded
Listed
May 6, 2026
Photos
15 photos
Property type
townhomes
Status
for sale

Features & Amenities

Two Or More StoriesPrivate BackyardRental PropertyDen

Photos

Building Facts

Year built
1853
Stories
4
Total units
8
Residential units
8
Building area
3,600 sqft
Lot size
1,577 sqft
Land use
Multi-family walk-up buildings
Building class
C1

From NYC public records where available.

Price History

May 7, 2026Initial record
$6,495,000for sale

Public Records

DOB violations1 open

14 total recorded against the building

HPD violations1 open

10 total recorded

ACRIS documents59

Tax-lot deed, mortgage, and transfer records on file

311 calls (12 mo)23,486

Top: encampment

Top complaint types in ZIP 10011

  • Encampment3,789
  • Noise - Residential1,437
  • Illegal Parking1,317
  • Homeless Person Assistance1,218
  • HEAT/HOT WATER1,215

Recent DOB

  • Nov 14, 2025V*-DOB VIOLATION - DISMISSED · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED
  • Sep 23, 2024V*-DOB VIOLATION - DISMISSED · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED
  • Jun 30, 2023V*-DOB VIOLATION - DISMISSED · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED
  • Jun 20, 2023V*-DOB VIOLATION - DISMISSED · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED

Recent HPD

  • Apr 29, 2026Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...
  • Nov 17, 2025Class I · §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITE...
  • Nov 22, 2024Class I · §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITE...
  • Apr 1, 2024Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...

Recent Transfers (ACRIS)

  • Sep 27, 2017DEED$5,720,000

Sourced from NYC Open Data (DOB, HPD, ACRIS). Updated as the city republishes — check the original source for live status.

You can also find this listing on StreetEasy.

Listing data sourced from streeteasy.com. RealtyLens enriches and contextualises it for you, but the original listing lives on the source.