443 12TH Street #1B
MLS® #RLS20086151
Listing by Corcoran Group
3
Bedrooms
2
Baths
1,915
Sq. Ft.
1960
Year Built
Quick Summary
Property Highlights
- Views: Other
- Exposure: South facing
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Apr 22, 2026 | $2,150,000 | - |
| Currently | Apr 23, 2026 | $2,150,000 | - |
Description
Loft 1B The Ansonia Clock Factory 443 12th Street
Set within the historic Ansonia Clock Factory,a distinguished early 20th-century Park Slope warehouse thoughtfully converted into cooperative residences, Loft 1B is a striking street-level duplex, meticulously redesigned in 2014 by architect Philippe Baumann. The renovation masterfully balances the building's industrial heritage with the clean, contemporary clarity for which Baumann Architecture is known.
Spanning approximately 1,915 square feet across two expansive levels, the residence is defined by its remarkable volume and structural character. A flood of natural light, soaring near triple-height ceilings, exposed brick, and original beam construction create a dramatic interplay between open living areas andA thoughtfully articulated private spaces.
Baumann's redesign emphasizes material continuity throughout, with hardwood flooring, steel and wood detailing, and extensive custom storage enhancing both functionality and aesthetic cohesion. Two distinct mezzanine levels further elevate the sense of verticality while offering flexibility for a variety of uses, whether as sleeping quarters, creative studios, or workspaces.
The upper level showcases preserved original structural elements, framing a generous eat-in kitchen and dining area unified within one expansive space, stylishly renovated with granite countertops and custom cabinetry, and anchored by soaring columns that lend a striking architectural presence.
In a chorus of elevated "floating" interventions, two mezzanine chambers and a full bathroom overlook the main living space. A distinctive system of accordion panels allows for adaptable privacy, elegantly modulating light and sound. Integrated LED lighting throughout enhances both ambiance and functionality.
A sculptural steel staircase serves as both centerpiece and connector, linking the upper volumes to a light-filled lower level designed for everyday living. This level offers generous space for lounging, working, and quiet retreat, all beneath impressive ceiling heights (24 feet height) and an abundance of natural light.
The primary suite completes the lower level, with integrated large closets, and featuring a glass-tiled en-suite shower room and a full-sized laundry room, set against modern concrete floors that echo the loft's industrial roots.
Accessible via elevator, the building's well-maintained communal rooftop offers sweeping views of Manhattan, including a direct sightline to the Statue of Liberty. It is an ideal setting for al fresco dining, sunset gatherings, and Fourth of July fireworks.
Located just minutes from Prospect Park, 443 12th Street retains the authentic character of its industrial past, with oversized windows, substantial proportions, and a true loft sensibility. Residents enjoy a professionally managed, pet-friendly cooperative with elevator access and a beautifully maintained shared rooftop, an exceptional extension of the home.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
Building Information
Financial Details
About Park Slope
View All Park Slope ListingsPark 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 NeighborhoodActive Listings
110
Median Asking Price
$1.70M
Median $/Sqft
$1,376
Avg Days on Market
N/A
New This Week
8
Price Reduced
17%
Sold (30 Days)
22
Median Sale Price
$1.67M
Live data from RLS at REBNY • Updated 4/22/26, 8:50 PM EST
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Location
443 12TH Street #1B, Park Slope, Kings County
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)
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Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
Market Data
RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.
Map & Location
OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.
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Frequently Asked Questions
Common questions about this property
The current listed monthly maintenance are $1,753 per month. Confirm the exact amount with the listing broker before making an offer.
This property has 3 bedrooms and 2 full bathrooms.
The listed interior living area is 1,915 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1960, making it approximately 66 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 the listing broker for weight limits or breed restrictions.
At the current list price of $2,150,000 for 1,915 sq ft, the asking price per square foot is approximately $1,123. This figure is for reference only and may differ from appraised or assessed values.
To schedule a private showing, contact Milton Coste at (917) 416-7433 or mcoste@kwnyc.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) 416-7433Listing Courtesy of Corcoran Group - Jessica L Buchman
Listing Contact: (917) 579-8641
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 Data display by Keller Williams NYC. Data last updated on 4/23/2026 at 12:50 AM UTC