Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
505 W End Avenue #12C

For Sale · Listing by Compass

505 W End Avenue #12C

Upper West Side, Manhattan

$1,800,000

Interested in this property?
Active For Sale • Co-op

$1,800,000

505 W End Avenue #12C

Upper West Side, Manhattan

MLS® #RLS20100556

RLS at REBNY

Listing by Compass

3
Bedrooms
2
Baths
N/A
Sq. Ft.
1922
Year Built

Quick Summary

Bedrooms 3
Bathrooms 2
Lot Size 10,267 sq ft
Year Built 1922
Ownership Co-op
Maintenance $4,041/mo
Neighborhood Upper West Side
Floor 12 of 14

Property Highlights

  • Views: City
  • Character: Pre-war building (1922)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 6
Baths 2 Full
Floor 12 of 14
View City
Pets Yes, CatsOk, DogsOk
Year Built 1922
Structure Type HighRise
Furnished Unfurnished
Lot Size 10,267 sq ft
Block/Lot 01246/0029

Listing History

Event Date Price Change
Listed Oct 1, 2026 $1,800,000 -
Currently Oct 2, 2026 $1,800,000 -

Description

Welcome to Apartment 12C at 505 West End Avenue, a gracious Classic Six in a well-established boutique cooperative on the coveted corner of West End Avenue and 84th Street. The sought-after C line is known for its exceptional proportions and flexible layout. A welcoming entry foyer seamlessly blends into the formal dining room and spacious living room. Designed for today's evolving lifestyles, the Classic Six floor plan offers exceptional renovation potential. Whether your vision includes a third bedroom, an expanded chef's kitchen, an additional bathroom, or reimagined entertaining spaces, the flexible layout provides endless possibilities to create a home tailored to your needs. Built circa 1922, the home retains timeless prewar character with soaring ceilings, original oak hardwood floors, classic moldings, and generously proportioned rooms. The apartment features two windowed full bathrooms, including a hall bath with a tub and a second bath with a shower adjoining the staff room, making it ideal as a guest suite, home office, or additional bedroom. The windowed kitchen offers tremendous potential for a custom renovation, providing the perfect opportunity to create your ideal chef's kitchen. Residents of 505 West End Avenue enjoy the convenience of a full-time doorman, live-in superintendent, fitness center, media room, laundry facilities, and a beautifully landscaped roof deck offering sweeping city, river, and skyline views. The cooperative is pet-friendly and permits in-unit washer/dryers and central air conditioning with board approval. Ideally situated moments from both Central Park and Riverside Park, the building is surrounded by the very best of the Upper West Side, including renowned restaurants, neighborhood boutiques, gourmet markets, and convenient transportation.

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed Common On Floor Common Area

Exterior Features

Building Roof Deck

Building Amenities

Bike Storage Elevators Fitness Center

Appliances

Dishwasher

Building Information

Building Data View Compliance & Permits
Total Units 68
Stories 14
Structure HighRise

Financial Details

Maintenance $4,041/mo

The Upper West Side (UWS) is celebrated for its cultural richness and architectural grandeur. Set between Central Park and Riverside Park, the neighborhood provides direct access to green space within the urban grid. Residents enjoy easy access to Lincoln Center, the American Museum of Natural History, and a popular culinary scene. The real estate landscape is famous for its historic brownstones and iconic 'white-glove' apartment buildings along Central Park West and Riverside Drive.

Upper West Side Live Market Data

View Neighborhood

Active Listings

533

Median Asking Price

$1.46M

Median $/Sqft

$1,559

Avg Days on Market

N/A

New This Week

20

Price Reduced

22%

Sold (30 Days)

75

Median Sale Price

$1.51M

Live data from RLS at REBNY • Updated 10/1/26, 9:49 PM EST

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Location

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505 W End Avenue #12C, Upper West Side, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1921
Year Built
105 years old
14
Floors
68
Residential Units
R10A
Zoning District
Elevator Apartments Historic District: Riverside-West End Historic District Extension I

Tax & Assessment

Assessed Value: $12,267,000
Land Value: $1,570,500
Exemptions: $57,550

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 10,250 SF
Building Area: 112,000 SF
Built FAR: 10.93
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $4,041 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 3 bedrooms and 2 full bathrooms.

According to MLS records, the building was constructed in 1922, making it approximately 104 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or milton@miltoncoste.com. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20100556
First Listed: 6/29/2026
On Market: 10/1/2026
Contract Date: 6/26/2026

Listing Courtesy of Compass - Brian J Goldfarb

Listing Contact: (917) 309-5108

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing 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. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 10/2/2026 at 1:49 AM UTC

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Milton Coste - NYC Real Estate Broker

Milton Coste

Licensed Real Estate Associate Broker

Keller Williams NYC

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Sale history, taxes, violations and comps for this unit

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Upper West Side Market Update

75 sales last 30 days · $1.46M median · 7.1 months supply

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Quick Facts

Status Active Type Co-op Neighborhood Upper West Side Borough Manhattan
County New York
Floor 12 of 14
Year Built 1922
First Listed 6/29/2026
Maintenance $4,041/mo

Monthly Costs Estimate

Down Payment 20%

$360,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $4,041
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $1M to $1,999,999 at 1.00%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$18,000

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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