Corner Duplex with Detached
For Sale
$899,999
4102 Avenue S, Brooklyn, NY 11234
Residential, Duplex, Brooklyn, NY
Property Size966 SF
Lot Size0.04 Acres
Price / SF$931.68
Days on Market108
Property Features for 4102 Avenue S
General Information
Property type
Residential
Property subtype
Duplex
Zoning
R4
Bedrooms
3
Bathrooms
2
Full bathrooms
2
Rooms
Bathroom 2, Bedroom 3, Bedroom 1, Bedroom 2, Bathroom 1
Parking features
Garage - Detached
Interior features
Refrigerator, Stove
Basement
Finished, Full
Subdivision
Marine Park
Standard status
Active
Size
966 SF
Lot size
0.04 Acres
Taxes and HOA fees
Tax Annual Amount
6648
Amenities
separate side entrance
private backyard
Building Details
Year built
1930
Floors in Building
2
Flooring type
Hardwood, Tile, Carpet
Architectural style
Other
Listing Agency:
ProBase Real Estate
(718) 210-2727
Listed By:
JiaJie (Kai) Zheng
(646) 407-6668
Added: Jun 16
Changed: Sep 16
Last Checked: Oct 1 at 4:06PM
MLS# 502271
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 1930-built duplex at 4102 Avenue S includes 966 square feet, three bedrooms, and two bathrooms within a functional residential layout. Tile, carpet, and hardwood flooring are complemented by a refrigerator and stove. A separate side entrance provides additional access, while the corner-lot position creates extra outdoor area and street exposure.
Exterior features include a private backyard and detached garage, offering outdoor space along with storage or parking capability. The property is in Brooklyn’s 11234 postal area, near schools, shopping, parks, and transportation. R4 zoning further identifies the property’s residential land-use classification.
Exterior features include a private backyard and detached garage, offering outdoor space along with storage or parking capability. The property is in Brooklyn’s 11234 postal area, near schools, shopping, parks, and transportation. R4 zoning further identifies the property’s residential land-use classification.
Key Highlights
- 966 square feet of property size
- 0.0425‑acre corner lot
- R4 zoning
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
$33,831
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
3.76%
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%
$676,620
$676.6K
Cap Rate 7%
$483,300
$483.3K
Cap Rate 9%
$375,900
$375.9K
Market Conditions
NOI Build-Up for 966 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
$49.3K $51.00/SF
− Vacancy
−$936 −$0.97/SF
EGI
$48.3K $50.03/SF
− OpEx
−$14.5K −$15.01/SF
NOI
$33.8K $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%
$676,620
Cap Rate 7%
$483,300
Cap Rate 9%
$375,900
Alternative Uses
Best Use
Multifamily LT 5
$483.3K
$422.9K – $563.9K
NOI $33,831 @ 7.0% cap · market cap 3.76%
Second Best
Apartment 5plus
$421.3K
$368.6K – $491.5K
NOI $29,491 @ 7.0% cap · market cap 3.28%
Theoretical Best
Specialty Retail
$799.8K
$699.9K – $933.2K
NOI $55,989 @ 7.0% cap · market cap 6.22%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
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Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
2,111
Businesses Nearby
Explore this area
Business Placement
Demographics for 11234, NY
92,133
Population
35,167
Households
2.6
Avg Household Size
41
Median Age
39%
College-Educated
89%
High-School Grad
7.4 sq mi
ZIP Area
12,450
Density / Sq Mi
$94,434
Median Household Income
$55,206
Median Earnings
$1,771
Median Rent
$746,800
Median Home Value
Check the figures for this property
Cap Rate, Value Estimation, Potential NOI and more
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Market
Vacancy Rate% for Multifamily in Northeast region
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Frequently Asked Questions
What type of property is this?
Duplex - R4-zoned duplex with a private backyard, separate side entrance, and detached garage.
Where is this duplex located?
The property is located at 4102 Avenue S Brooklyn, NY.
What is the asking price?
The asking price for this property is $899,999.
What are key features of this property?
This property features: 966 square feet of property size; 0.0425‑acre corner lot; R4 zoning
