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6 Beds
5 Baths
1,050 sqft

$6,250,000

121 St Marks Avenue, Brooklyn NY, 11217

Price per sqft$5,952.38
Built in1910
Property size1,050 sqft
Property typeTownhomes

Policies

Pets Allowed
Yes

Overview

Pending

Listed Apr 21, 2026

Updated 4h ago

121 Saint Marks Avenue

On a picturesque, tree-lined block in the heart of Prospect Heights, 121 Saint Marks Avenue is a classic 21-foot-wide Brooklyn brownstone offering exceptional scale, flexibility, and opportunity.

Set on an extra-deep block, the home unfolds across approximately 4,000 square feet and is currently configured as an owner's triplex over a private one-bedroom garden apartment. Behind its handsome historic facade lies a residence defined by grand proportions, soaring ceilings, and the timeless character that makes Brooklyn townhouses so beloved.

The owner's triplex begins on the gracious parlor level, where tall windows fill the living room with natural light and original details speak to the home's historic charm. A formal dining room creates an elegant setting for entertaining, flowing naturally toward the kitchen and out to a deck overlooking the garden below. It is a floor designed equally for lively gatherings and quiet evenings at home.

Upstairs, the second and third floors offer a generous and flexible layout with multiple bedrooms and the potential for home offices, libraries, or creative spaces. The home's impressive 21-foot width allows each room to feel open and comfortable, a rarity even among Brooklyn townhouses.

Below, the garden level is configured as a one-bedroom apartment with its own entrance and direct access to the garden, ideal for rental income, guests, or conversion into a spectacular single-family residence.

The property will be delivered vacant, presenting a rare opportunity for the next owner to move right in, create a custom townhouse, or design the ideal live-plus-income configuration.

Just moments from the cafés and restaurants of Vanderbilt Avenue, the cultural energy of the Barclays Center district, and the green expanses of Prospect Park, the location offers the very best of Brooklyn living. Multiple subway lines nearby provide easy access to Manhattan and beyond.

$41,581/mo

Est. mortgage payment based on a $6,250,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
RLS20085734

Interior Features

Bedrooms
6
Bathrooms
5
Fireplace
Yes
Cooling
Yes
Basement
No

Exterior Features

Lot Size
0.07 Acres

Other Property Details

Taxes
$9,924
Tax Frequency
Annually
View
Yes
MLS provider logo

Listing Courtesy of Corcoran Group -  Jessica L Buchman

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.This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

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

RLS Data display by Compass. Data last updated on 9/15/2026 at 8:35 AM UTC

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