894 UNION Street
$5,750,000
MLS# RLS20120343 · Park Slope
Listed October 10, 2026 · 19 days on the market
4 Beds 5 Baths 4,846 Sq.Ft.
About This Property
894 Union Street is a distinguished landmarked 21 ft. wide Neo-Grec brownstone that has been lovingly maintained and thoughtfully upgraded by its current owners for more than two decades. Well-positioned on one of Park Slope's most coveted blocks between Prospect Park West and Eighth Avenue, close to Grand Army Plaza and Prospect Park, this legal four-family townhouse is currently configured as a three-family home, offering an ideal balance of luxurious owner occupancy and strong income potential.
The owners' residence occupies the garden and parlor levels in a beautifully appointed 2-bedroom, 2.5-bath duplex , where thoughtful renovations complement the home's extraordinary nineteenth-century craftsmanship. Mitsubishi & LG mini-split systems provide efficient heating and cooling, while all-new Marvin windows installed throughout the townhouse between 2014 and 2015 enhance comfort and performance while preserving the residence's historic character. Soaring ceilings and graciously proportioned rooms showcase a remarkable collection of original details. The parlor level retains its magnificent mahogany staircase, richly detailed mahogany moldings and window casings, elegant wainscoting, window shutters, pocket doors and original dining room mantel, all preserved in exceptional condition. Upstairs, finely crafted oak millwork continues the home's architectural story, reflecting the quality and artistry of its original construction.
The parlor-level kitchen opens to a beautifully designed outdoor retreat, featuring a custom steel & Ipe wood deck installed in 2016 with a staircase leading directly to the backyard. Designed as a private urban sanctuary, the garden features a tranquil Zen-inspired landscape with bamboo fencing, bluestone pavers, and custom terracotta tile details, creating a serene extension of the living space perfect for entertaining, gardening, or quiet moments outdoors.
Below the duplex, a fully finished lower level reveals an extraordinary surprise: a custom retro-inspired movie theater designed by the previous owner, Theo Kalomirakis, widely regarded as the father of luxury home theater design. This remarkable screening room served as the prototype for what would become his internationally acclaimed work and remains a truly unique amenity for film enthusiasts and entertainers alike.
The upper floors are configured as two oversized one-bedroom, one-bath apartments , each thoughtfully designed with an additional home office or nursery. These generously scaled apartments offer excellent rental income potential while maintaining a high standard of comfort and livability. The top-floor residence is currently leased until April 2027, providing a stable income stream for the next owner.
Located within the coveted P.S. 321 school district , 894 Union Street enjoys one of Brooklyn's premier residential locations, just moments from Prospect Park, the Grand Army Plaza Greenmarket, Brooklyn Museum, Brooklyn Botanic Garden, acclaimed restaurants, cafés & boutiques on 7th Avenue, plus multiple subway lines.
Showings by appointment only.
Agent's Note
From Curtis Bain. Details about the apartment are drawn from the listing information provided through RLS by Corcoran Group.
A custom retro-inspired movie theater fills the finished lower level, designed by the previous owner, Theo Kalomirakis, whom the listing describes as a father of luxury home theater design. It's a rare feature for a Park Slope house, and I'd think of that room as the main entertaining space rather than storage.
The house is a 21 foot wide Neo-Grec brownstone built in 1887 and located in the Park Slope Historic District. It has 4,846 square feet over three stories and five bathrooms. The parlor level keeps its mahogany staircase, moldings and window casings, wainscoting, window shutters, pocket doors and dining room mantel, and the upper floors have oak millwork.
Ductless cooling is a home feature here, with Mitsubishi and LG mini-split systems providing heating and cooling. The Marvin windows were installed between 2014 and 2015 and keep the historic character of the street-facing rooms.
The parlor-level kitchen opens onto a custom steel and Ipe wood deck, built in 2016, with a staircase down to the backyard. The garden has bamboo fencing, bluestone pavers and terracotta tile details, which makes it a practical outdoor room if you cook and entertain often.
Everyday use is well covered, with a washer and dryer in the unit, a dishwasher, storage, walk-in closets and a decorative fireplace. A townhouse like this gives you more separation across floors than a flat, though the stairs and the upkeep of a three-story building are part of the picture. The top-floor residence is leased through April 2027.
Prospect Park is about 3 minutes away on foot, and the 2 and 3 trains at Grand Army Plaza are about 4 minutes away. The 7th Avenue Gourmet supermarket is about 5 minutes on foot.
Quick answers+
Does the home have in-unit laundry?
Yes. There is a washer and dryer in the unit.
Is there private outdoor space?
Yes. The home has a balcony, a deck, and private outdoor space over 60 square feet, along with a backyard garden with bluestone pavers and bamboo fencing.
Does the home have air conditioning?
Yes. It has ductless cooling, with Mitsubishi and LG mini-split systems that provide heating and cooling.
Curtis Bain
Brown Harris Stevens
Property Features
Policies
- Pets allowed
- Smoke-free
Home features
- Washer/dryer in unit
- Ductless cooling
- Decorative fireplace
- Dishwasher
- High ceilings
- Storage
- Walk-in closets
- Balcony
- Private outdoor space (over 60 sq ft)
- Deck
Building amenities
Services and facilities
- Green building
Estimate
Monthly Cost & Closing Costs
The rate is a placeholder, not a quote. Enter the one your lender gives you.
$31,362 / month
- Principal and interest$29,075
- Property taxes$2,287
Due at closing
- Down payment (20%)$1,150,000
- NYS “mansion tax” (2.25%)$129,375
- Mortgage recording tax (1.925%)$88,550
Not included: attorney, title insurance, lender and appraisal fees, board application and move-in fees, flip tax and prepaid items. Estimates only, based on the published New York State rates. Your attorney and lender will confirm the real figures.
Gallery
Property Photos
Listing Courtesy of Corcoran Group
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.