50 Madison Avenue: Apartments for Sale & Rent

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Last updated on Jan 31, 2026

50 Madison Avenue

In 1896, the five-story headquarters of the American Society for the Prevention of Cruelty to Animals opened at 50 Madison Avenue, designed by Renwick, Aspinwall & Owen. In 2005, the building was remodeled into an 11-story luxury condominium building, preserving the lower three floors and adding eight new floors clad in limestone-colored precast panels. Currently, 1 apartment is for sale.

All Apartments For Sale (1) $2,196 Avg. price/ft²
Recent Sales (3) $2,399 Avg. price/ft²
All Units in Building (9)

Apt. 6
Quick view: 14 photos

3 beds

3.5 baths

2,630 ft²

$2,196

$5,775,000 -3.7%

Jul 5, 2025

219 days

#6: $5,775,000 (-3.7%) - 3 beds

Apt. RU 7

3 beds

3.5 baths

2,630 ft²

$6,500,000

$2,471

$6,500,000

May 21, 2024

Apt. RU 9

4 beds

3.5 baths

3,564 ft²

$9,000,000

$2,525

Nov 1, 2023

Apt. RU 8

3 beds

3.5 baths

2,630 ft²

$5,787,500 -12%

$2,201

$6,575,000

Mar 31, 2023

View Full Sales History

Overview of 50 Madison Avenue

50 Madison Avenue was built in 1896 and converted to condos in 2005. 50 Madison Avenue has a total of 9 apartments and is located in Flatiron/Union Square, very close to the N, R and 6 subway lines.

Amenities at this pet friendly building include doorman, resident storage, terraces / balconies and central ac.

Similar nearby buildings include 400 Park Avenue South, 90 Lexington Avenue, 45 East 22nd Street and 260 Park Avenue South. See more ->

Doorman

Full Time

Type

Condo

Year Built

1896

Converted: 2005

Apartments

9 (view all units)

Floors

Pets: Allowed

Neighborhood

Flatiron/Union Square (Manhattan)

Min Down

20%

Maps &
3D Aerial Views

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Amenities

FT Doorman
Resident Storage
Central AC
Elevator
Outdoor Entertainment Space
In-Unit Washer/Dryer
Terraces / Balconies

Area Map StreetView

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at Park Ave 0.12 miles

at Broadway 0.19 miles

at 6th Ave 0.32 miles

at 7th Ave 0.46 miles

at 6th Ave 0.46 miles

Pros & Cons

Overlooks Madison Square Park
Doorman
Individual storage units
Permits pets
Large layouts
Convenient to many restaurants
Good public transportation
Convenient to Flatiron and Chelsea districts
Elegant entrance
Full floor residences
Close to Subway

No sidewalk landscaping
No garage
No roof deck
No balconies

CityRealty Rating

/44

Architecture

/36

Location

/39

Features

Editor’s Points

CITYREALTY
RATING

How is the CityRealty Rating calculated?
Architecture

30+ remarkable

20-29 distinguished

11-19 average

< 11 below average
Location

27+ remarkable

18-26 distinguished

9-17 average

< 9 below average
Features

22+ remarkable

16-21 distinguished

9-15 average

< 9 below average
CityRealty’s Ratings Explained

Sales History

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Sales Summary

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Sales History by Apartment Size

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Pricing Comparison of Similar Buildings

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Editorial Coverage

Alternate Address

50 Madison Park

The Treadwell

between Second Avenue & Third Avenue

Lenox Hill

Comfortable elegance on the Upper East Side. Whole-life amenities + complimentary 1-year memberships to Sollis Health and Omacasa | Immediate occupancy

4 beds starting at $9,500,000

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RLS IDX Data display by CityRealty.com, LLC. This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved. IDX information is provided exclusively for consumers’ personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer and for no listing shall the number of bedrooms listed be considered a legal conclusion.

All closed sales data has been provided by the New York City Department of Finance via the Automated City Register Information System (ACRIS). No warranty or representation is made as to the accuracy of any data provided by ACRIS or any other sources.

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An equal housing opportunity

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50 Madison Avenue

Overview of 50 Madison Avenue

Maps &3D Aerial Views

Amenities

Pros & Cons

CityRealty Rating

How is the CityRealty Rating calculated?

Sales History

Sales Summary

Sales History by Apartment Size

Pricing Comparison of Similar Buildings

Editorial Coverage

Alternate Address

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