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1148 Fifth Avenue #12C
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Active For Sale Co-op

$4,695,000

1148 Fifth Avenue #12C

Carnegie Hill, Manhattan

MLS® #RLS20083774

RLS at REBNY

Listing by Sothebys International Realty

4

Bedrooms

3

Baths

N/A

Sq. Ft.

1922

Year Built

Quick Summary

Bedrooms 4
Bathrooms 3
Year Built 1922
Ownership Co-op
Maintenance $8,384/mo
Neighborhood Carnegie Hill
Floor 12 of 13

Property Highlights

  • Views: Park Greenbelt
  • Fireplace: 1 fireplace
  • Character: Pre-war building (1922)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 9
Baths 3 Full
Floor 12 of 13
View Park Greenbelt
Pets Yes
Cross Street 95th Street/96th Street
Year Built 1922
Structure Type MultiFamily
Flooring Wood
Block/Lot 01507/0069

Description

Welcome to Residence 12C at 1148 Fifth Avenue, a distinguished home in one of J.E.R. Carpenter’s most celebrated Fifth Avenue cooperatives. This grand, light-filled nine-room residence exemplifies Carpenter’s hallmark elegance, with soaring 10-foot ceilings, balanced proportions, and a beautifully articulated prewar layout. Centered around a gracious 20’ x 8’ entrance gallery, the residence offers a refined, symmetrical flow characteristic of Carpenter’s finest designs. A semi-private landing opens into a formal gallery leading to the expansive living room, anchored by an original wood-burning fireplace and a side view overlooking the treetops of Central Park. To the south, French doors reveal a sun-drenched dining room, its light and scale ideal for grand entertaining. Original oak floors, brass hardware, and preserved millwork throughout the principal rooms speak to the home’s meticulous stewardship and timeless craftsmanship. The renovated kitchen merges classic architecture with modern convenience, opening onto the former butler’s pantry to create a spacious eat-in area with thoughtful storage and a vented washer/dryer. Two adjoining staff rooms retain their original details and functionality, now ideal as home offices or guest quarters. A custom-designed wine pantry offers additional sophistication and utility. A private hallway leads to three large bedrooms and two well-appointed baths. The primary suite, facing north with partial park views, features three walk-in closets and an en-suite bath that also adjoins the library. The two secondary bedrooms share a spacious, windowed bathroom. The cooperative’s history of board-approved alterations allows for the possibility of a powder room and a fourth full bath within this line. This residence includes a private storage unit, bicycle room, and access to the newly renovated fitness center. The building—pet-friendly and offering up to 50% financing—encourages central air installation. A 2% flip tax is applicable. Located in the heart of Carnegie Hill along Fifth Avenue’s most distinguished residential stretch, 1148 Fifth Avenue offers an exceptional lifestyle defined by impeccable service and timeless elegance. Residents enjoy white-glove amenities, including a 24-hour doorman, live-in resident manager, and a dedicated, attentive staff. Overlooking Central Park and the 95th Street playground, the building is surrounded by the neighborhood’s most esteemed cultural and educational institutions, including many of New York’s finest private schools. Nearby Madison Avenue boutiques and restaurants further enhance the appeal, while Mount Sinai Hospital is just moments away—making this one of Fifth Avenue’s most sought-after and refined addresses.

Features & Amenities

Interior Features

Common On Floor Common Area Laundry Room Flooring: Wood Fireplace (1)

Building Amenities

Elevators

Appliances

Dishwasher

Building Information

Total Units 59
Stories 13
Structure MultiFamily

Financial Details

Maintenance $8,384/mo

Carnegie Hill is one of Manhattan's most refined and tranquil residential pockets. Located in the northern section of the Upper East Side, it is defined by its proximity to Central Park and the 'Museum Mile.' The neighborhood is famous for its low-rise historic architecture and grand pre-war cooperatives. It offers a sophisticated, community-oriented atmosphere with nearby private schools and charming local boutiques.

Carnegie Hill Live Market Data

View Neighborhood

Active Listings

131

Median Asking Price

$2.69M

Median $/Sqft

$1,563

Avg Days on Market

N/A

New This Week

17

Price Reduced

29%

Sold (30 Days)

16

Median Sale Price

$2.44M

Live data from RLS at REBNY • Updated 4/14/26, 7:37 PM EST

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Location

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1148 Fifth Avenue #12C, Carnegie Hill, New York County • Near 95th Street/96th Street

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Floor Plans

Floor Plan
MLS® ID: RLS20083774
First Listed: 4/14/2026
On Market: 4/9/2026
Price Changed: 4/14/2026
Contract Date: 4/9/2026

Listing Courtesy of Sothebys International Realty - Dianne M Weston

Listing Contact: (917) 693-8442

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 4/14/2026 at 11:37 PM UTC

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