Semi-Detached Single-Family
For Sale
$1,598,000
123 Avenue J, Brooklyn, NY 11230
Residential, Duplex, Brooklyn, NY
Property Size1,950 SF
Lot Size0.04 Acres
Price / SF$819.49
Days on Market135
Property Features for 123 Avenue J
General Information
Property type
Residential
Property subtype
Duplex
Zoning
R3-1
Bedrooms
4
Bathrooms
3
Full bathrooms
3
Rooms
Bedroom 1, Bedroom 3, Bathroom 2, Bedroom 2, Bedroom 4, Bathroom 1, Bathroom 3
Patio and Porch features
Porch
Interior features
Porch
Basement
Finished
Subdivision
Boro-Park
Standard status
Active
Size
1,950 SF
Lot size
0.04 Acres
Taxes and HOA fees
Tax Annual Amount
5710
Building Details
Year built
1920
Floors in Building
2
Flooring type
Hardwood
Architectural style
Other
Listing Agency:
Ben Bay Realty Co
Listed By:
Arthur Y. Bakayev
(718) 680-6442
Added: Apr 23
Changed: Aug 31
Last Checked: Sep 4 at 2:06AM
MLS# 500686
Copyright © 2026 Brooklyn New York Multiple Listing Service. 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.
This solid brick semi-detached single-family home offers two full floors plus a full basement, laid out to support a range of residential updates. The property sits on an 18 x 100 lot with a building footprint of 18 x 55, and it is currently in need of renovation, presenting an opportunity to customize the interior to your preferences.
The address is on Avenue J in Brooklyn, within short distance of the Avenue F train for transportation access. The home is also described as being situated on East 2nd Street and Avenue J.
Given the existing two-floor plus basement configuration and the renovation needed, the property may appeal to buyers looking for a residence they can refresh and tailor during the build-out process.
The address is on Avenue J in Brooklyn, within short distance of the Avenue F train for transportation access. The home is also described as being situated on East 2nd Street and Avenue J.
Given the existing two-floor plus basement configuration and the renovation needed, the property may appeal to buyers looking for a residence they can refresh and tailor during the build-out process.
Key Highlights
- 1920 brick, semi‑detached single‑family home on an 18 x 100 lot
- 18 x 55 building with two full floors plus a full basement for added space
- Four bedrooms plus three bathrooms
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$68,292
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
4.27%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$1,365,840
$1.4M
Cap Rate 7%
$975,600
$975.6K
Cap Rate 9%
$758,800
$758.8K
Market Conditions
NOI Build-Up for 1,950 SF
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.
Gross rent
$99.5K $51.00/SF
− Vacancy
−$1.9K −$0.97/SF
EGI
$97.6K $50.03/SF
− OpEx
−$29.3K −$15.01/SF
NOI
$68.3K $35.02/SF
Area
Brooklyn, NY
Vacancy
1.90%
Lease Rate
$51.00 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$1,365,840
Cap Rate 7%
$975,600
Cap Rate 9%
$758,800
Alternative Uses
Best Use
Multifamily LT 5
$975.6K
$853.7K – $1.14M
NOI $68,292 @ 7.0% cap · market cap 4.27%
Second Best
Apartment 5plus
$850.4K
$744.1K – $992.2K
NOI $59,531 @ 7.0% cap · market cap 3.73%
Theoretical Best
Specialty Retail
$1.61M
$1.41M – $1.88M
NOI $113,022 @ 7.0% cap · market cap 7.07%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Location Intelligence
Trade Area within ½ mile
3,751
Businesses Nearby
Explore this area
Business Placement
Demographics for 11230, NY
91,391
Population
34,269
Households
2.7
Avg Household Size
35
Median Age
44%
College-Educated
82%
High-School Grad
1.8 sq mi
ZIP Area
50,773
Density / Sq Mi
$69,522
Median Household Income
$43,135
Median Earnings
$1,734
Median Rent
$863,400
Median Home Value
Market
Vacancy Rate% for Multifamily in Northeast region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Duplex - Solid brick semi-detached home with two full floors and a full basement on an 18 x 100 lot, requiring renovation.
Where is this duplex located?
The property is located at 123 Avenue J Brooklyn, NY.
What is the asking price?
The asking price for this property is $1,598,000.
What are key features of this property?
This property features: 1920 brick, semi‑detached single‑family home on an 18 x 100 lot; 18 x 55 building with two full floors plus a full basement for added space; Four bedrooms plus three bathrooms
