Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
420 6th Avenue #12

For Sale · Listing by Compass

420 6th Avenue #12

Park Slope, Brooklyn

$975,000

Interested in this property?
Active For Sale Co-op

$975,000

420 6th Avenue #12

Park Slope, Brooklyn

MLS® #RLS20113139

RLS at REBNY

Listing by Compass

Open House Scheduled

Sunday, September 13 • 11:00 AM – 1:00 PM

REBNY 2025: signed Buyer Representation Agreement required before any showing.

2
Bedrooms
1
Bath
N/A
Sq. Ft.
1900
Year Built

Quick Summary

Bedrooms 2
Bathrooms 1
Lot Size 2,790 sq ft
Year Built 1900
Ownership Co-op
Maintenance $1,123/mo
Neighborhood Park Slope
Floor 1 of 4

Property Highlights

  • Style: WalkUp architecture
  • Character: Pre-war building (1900)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 1 Full
Floor 1 of 4
Pets CatsOk
Year Built 1900
Architectural Style WalkUp
Flooring Hardwood
Furnished Unfurnished
Lot Size 2,790 sq ft
Parcel # 01005-0042-00420-000-0000012
Block/Lot 01005/0042

Listing History

Event Date Price Change
Listed Sep 8, 2026 $975,000 -
Currently Sep 8, 2026 $975,000 -

Description

Bespoke, bright, and quintessentially Brooklyn. A private entrance, soaring ceilings, and a slice of Park Slope history give this one-of-a-kind maisonette a character entirely its own. Originally home to the building’s neighborhood bodega, this distinctive two-bedroom has been transformed into a charming residence while retaining the qualities that make it so unique: its own street-level entrance, dramatic 11.5 foot lofted ceilings, oversized windows and an abundance of natural light from two exposures. Tucked behind a gated patio on the corner of 8th street and 6th avenue, this home feels more like a boutique house than an apartment. The airy living and dining space is framed by custom floor-to-ceiling built-ins that add both architectural character and an impressive amount of storage. The adjacent open-concept kitchen is thoughtfully designed with full-size stainless steel appliances including a new Frigidaire induction range, abundant cabinetry and counter space, along with a breakfast bar that connects naturally to the living space. Both bedrooms are well proportioned, filled with light, and feature floor-to-ceiling double closets with upper cabinet storage. The primary offers two oversized windows and room for a king-sized bed with additional furniture, while the second bedroom features extensive custom built-in cabinetry and shelving–equally suited to a bedroom, nursery, or home office. A crisp white bathroom is finished with classic subway tile and a marble-topped vanity. Just outside the front door, the building's shared patio feels like a natural extension of the home and is used almost exclusively by this residence—an especially rare amenity in the heart of Park Slope. And then there's the roof. The building's expansive common roof deck rises above the surrounding treetops, with open sky and sweeping views across Brooklyn toward Downtown Manhattan—a spectacular setting for morning coffee, sunset drinks or an evening with friends. Residents enjoy free laundry in the cellar and individual private storage rooms; #12's dedicated storage space measures nearly 50 square feet. There is additional bike storage and stroller storage, both free of charge. The co-op also permits owners to install an in-unit washer/dryer. All of this in a setting that feels distinctly Park Slope, moments from Prospect Park, neighborhood cafés and restaurants, groceries and shopping, the Brooklyn Public Library, YMCA, and convenient access to F, G, & R trains and bus transportation. Cats welcome. Dogs considered on a case-by-case basis.

Features & Amenities

Interior Features

Breakfast Bar Building Washer Dryer Install Allowed Common On Floor Common Area Flooring: Hardwood

Exterior Features

Building Roof Deck

Building Amenities

Bike Storage

Appliances

Dishwasher

Building Information

Building Data View Compliance & Permits
Total Units 9
Stories 4
Style WalkUp

Financial Details

Maintenance $1,123/mo

Park Slope is a well-known Brooklyn neighborhood, recognized for its tree-lined streets and preserved brownstones. Bordering the western edge of Prospect Park, the neighborhood offers convenient access to green space. The real estate market features a mix of historic townhouses, cooperatives, and modern condominiums, within walking distance of the park.

Park Slope Live Market Data

View Neighborhood

Active Listings

51

Median Asking Price

$1.77M

Median $/Sqft

$1,405

Avg Days on Market

N/A

New This Week

13

Price Reduced

16%

Sold (30 Days)

44

Median Sale Price

$1.70M

Live data from RLS at REBNY • Updated 9/8/26, 5:23 PM EST

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Location

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420 6th Avenue #12, Park Slope, Kings County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1900
Year Built
126 years old
4
Floors
12
Residential Units
R6B
Zoning District
Walk-Up Apartments

Tax & Assessment

Assessed Value: $940,950
Land Value: $100,350
Exemptions: $2,230

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

Lot Area: 2,745 SF
Building Area: 9,776 SF
Built FAR: 3.56
Allowed FAR: 2

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 $1,123 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 2 bedrooms and 1 full bathroom.

According to MLS records, the building was constructed in 1900, making it approximately 126 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: Dogs considered on a case-by-case basis,Building Pets Allowed Comments:Cats OK. Dogs upon approval. 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: RLS20113139
First Listed: 9/8/2026
On Market: 9/8/2026
Price Changed: 9/8/2026
Contract Date: 9/7/2026

Listing Courtesy of Compass - Piers Portfolio

Listing Contact: (201) 739-6344

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 9/8/2026 at 9:23 PM UTC

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Park Slope Market Update

44 sales last 30 days · $1.77M median · 1.2 months supply

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Quick Facts

Status Active Type Co-op Neighborhood Park Slope Borough Brooklyn
County Kings
Floor 1 of 4
Year Built 1900
First Listed 9/8/2026
Style WalkUp
Maintenance $1,123/mo

Monthly Costs Estimate

Down Payment 20%

$195,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $1,123
Total Monthly $0

Estimates only. Consult a lender for exact figures.

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