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Double Duplex With Private Rooftop

676 Union St Brooklyn, NY 11215

676 Union St, Brooklyn, NY, 11215
$6,850,000
For Sale
Claim this Listing
$6,850,000

Other - Brooklyn, NY

Property Size6,500 SF
Price / SF$1,053
AddedJun 12
Days on Market35
Last RefreshJul 16 at 12:06 pm

Property Features for 676 Union St

General Information

Property type
Other
Property subtype
Multi Family
Bedrooms
6
Bathrooms
5
Rooms
Bathroom 1, Bathroom 2, Bathroom 3, Bathroom 4, Bathroom 5, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4, Bedroom 5
Exterior features
Private Yard
Standard status
Active
Size
6,500 SF

Building Details

Year built
1920
Flooring type
Wood
Roof type
Other
Architectural style
Other

Listing agent Donald Brennan

Listing office Engel & Völkers Brooklyn Cobble Hill 221A Court Street, Brooklyn, NY

Listing date Jun 12, 2026

MLS# AM-5509147 Listing URL

Copyright © 2026 Engel & Völkers. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.


Investment Insights

Based on property information with market context.

A distinctive 25-foot-wide loft-style building offering a legal two-family configuration and an additional ground-level art gallery and studio with a kitchenette and powder room. The layout consists of two double duplex residences, each featuring an internal wood staircase and a wood-burning fireplace. The property has been stripped to original brick and reimagined with an emphasis on enduring build quality.

Upper levels include soaring 10-foot ceilings on the fifth floor, supported by two skylights for natural light. A private rooftop provides city views, and a south-facing Mediterranean-inspired garden with Italian stone-tiled floors adds a secluded outdoor space.

The current setup supports separate duplex-style living while also offering a flexible architectural canvas for potential reconfiguration into two condominiums or a single family estate, subject to verification of feasibility.

Key Highlights

  • Rare 25‑foot‑wide loft building with over 6,500 sq ft in prime Park Slope location.
  • Versatile architectural canvas suitable for a grand single‑family estate, two condos, or two duplex residences.
  • Private rooftop with sweeping city views and a secluded, south‑facing Mediterranean‑inspired garden.

Local Financial Insights For Multifamily LT 5

Simulate Cap Rate and NOI

NOI Build-Up
Vacancy
income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
EGI (Effective Gross Income)
gross rent minus vacancy losses — the realistic income before paying operating costs.
OpEx (Operating Expenses)
recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
NOI (Net Operating Income)
income a property generates after operating costs but before financing and taxes.

Component $ $/SF
Gross rent $331.5k $51.00
− Vacancy −$6.3k −$0.97
EGI $325.2k $50.03
− OpEx −$97.6k −$15.01
NOI $227.6k $35.02
6,500 SF · lease $51.00/SF/yr · vacancy 1.90% · expense 30.00%

Alternative Uses

Best Use
Multifamily LT 5
$3.25M
$2.85M – $3.79M (±1% cap)
NOI $227,641 @ 7.0% cap · market cap 3.32%
Second Best
Apartment 5plus
$2.83M
$2.48M – $3.31M (±1% cap)
NOI $198,438 @ 7.0% cap · market cap 2.90%
Theoretical Best
Specialty Retail
$5.38M
$4.71M – $6.28M (±1% cap)
NOI $376,740 @ 7.0% cap · market cap 5.50%
Zoning and permitted uses should be independently verified with local authorities.

Property Analytics

Property Profile Location Intelligence

Current Use by Public Records

Stairs New York Construction Company

Suggested Use

Law Firm Accounting Firm Nursing Home Nursing Home Auto Parts Store Catering Service Adult Day Care Tanning Salon Pet Grooming Service (Bike/Boat/Book/etc) Store

Zoning and permitted uses should be independently verified with local authorities.

FAQs

What type of property is this?
Duplex - Legal two-family double duplex offers internal wood staircase, fireplaces, and a private rooftop plus ground-level art space.
Where is this duplex located?
The property is located at 676 Union St Brooklyn, NY.
What is the asking price?
The asking price for this property is $6,850,000.
What are key features of this property?
This property features: Rare 25‑foot‑wide loft building with over 6,500 sq ft in prime Park Slope location.; Versatile architectural canvas suitable for a grand single‑family estate, two condos, or two duplex residences.; Private rooftop with sweeping city views and a secluded, south‑facing Mediterranean‑inspired garden.
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