Brick Duplex with Finished
For Sale
$2,895,000
4423 9th Avenue, Brooklyn, NY 11220
Residential, Brooklyn, NY
Property Size2,840 SF
Lot Size0.05 Acres
Price / SF$1,019
Days on Market52
Property Features for 4423 9th Avenue
General Information
Property type
Residential Multi Family
Property subtype
Other
Zoning
R6
Bedrooms
8
Bathrooms
6
Full bathrooms
4
Half bathrooms
2
Rooms
Bedroom 7, Bathroom 3, Bathroom 2, Bedroom 6, Bedroom 3, Bedroom 2, Bathroom 5, Bathroom 4, Bathroom 6, Bathroom 1, Bedroom 5, Bedroom 1, Bedroom 8, Bedroom 4
Interior features
Dishwasher, Microwave, Refrigerator, Stove
Basement
Full, Finished
Subdivision
Boro-Park
Standard status
Active
Size
2,840 SF
Lot size
0.05 Acres
Taxes and HOA fees
Tax Annual Amount
10956
Building Details
Year built
1925
Floors in Building
2
Number of units
2
Flooring type
Carpet, Hardwood, Parquet Wood, Tile
Building materials
Brick
Roof type
Flat
Buildings
1
Listing Agency:
RE/MAX Real Estate Professiona
Listed By:
Billy Apter · License #BEA5721
(718) 532-2000
Added: Sep 16
Changed: Oct 31
Last Checked: Nov 6 at 5:06AM
MLS# 504613
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.
Ask AI about this property
Review the available facts, identify missing information and prepare questions for the agent.
Investment Insights
Based on property information with market context.
This 2,840-square-foot duplex is a corner, semi-detached brick residence built in 1925. The home occupies a 25x100 lot and has a 20x71 house size. The second floor provides four bedrooms, two full bathrooms, a kitchen, living room, and dining room. The first floor includes three bedrooms, one and one-half bathrooms, a kitchen, living room, and dining room. A full finished basement adds a family room, recreation room, media room, summer kitchen, and bathrooms, with separate entrances. A private driveway accommodates three cars. Interior features include a dishwasher, microwave, refrigerator, and stove, with parquet wood, hardwood, tile, and carpet flooring.
The property is located at 4423 9th Avenue in Brooklyn, NY 11220, within the Sunset Park/Boro Park area. The source information identifies nearby transportation, shopping along 8th Avenue and Fort Hamilton Parkway, schools, and houses of worship. The property is zoned R6.
The property is located at 4423 9th Avenue in Brooklyn, NY 11220, within the Sunset Park/Boro Park area. The source information identifies nearby transportation, shopping along 8th Avenue and Fort Hamilton Parkway, schools, and houses of worship. The property is zoned R6.
Key Highlights
- 2,840‑square‑foot duplex on a 25x100 lot
- 20x71 house size with corner, semi‑detached brick construction
- Full finished basement with separate entrances
Financial Insights
Estimated NOI and Cap Rate
NOI / Yr
$84,560
Cap Rate
2.92%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,691,200
$1.7M
Cap Rate 7%
$1,208,000
$1.2M
Cap Rate 9%
$939,556
$939.6K
Market Conditions
NOI Build-Up for 2,840 SF
Gross rent
$126.1K $44.40/SF
− Vacancy
−$5.3K −$1.86/SF
EGI
$120.8K $42.54/SF
− OpEx
−$36.2K −$12.76/SF
NOI
$84.6K $29.77/SF
Area
ZIP 11220
Vacancy
4.20%
Lease Rate
$44.40 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,691,200
Cap Rate 7%
$1,208,000
Cap Rate 9%
$939,556
Alternative Uses
Best Use
Multifamily LT 5
$1.21M
$1.06M – $1.41M
NOI $84,560 @ 7.0% cap · market cap 2.92%
Second Best
Apartment 5plus
$1.08M
$946.7K – $1.26M
NOI $75,733 @ 7.0% cap · market cap 2.62%
Theoretical Best
Office A
$1.84M
$1.61M – $2.15M
NOI $128,877 @ 7.0% cap · market cap 4.45%
Zoning and permitted uses should be independently verified with authorities.
How Realmo checks its estimates
Property Analytics
Who owns this building?
See the owner, sales and loan history
Open Analytics
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
6,877
Businesses Nearby
Explore this area
Business Placement
Demographics for 11220, NY
105,797
Population
30,897
Households
3.4
Avg Household Size
35
Median Age
25%
College-Educated
62%
High-School Grad
1.7 sq mi
ZIP Area
62,234
Density / Sq Mi
$64,201
Median Household Income
$31,489
Median Earnings
$1,688
Median Rent
$1,021,200
Median Home Value
Check the figures for this property
Cap Rate, Value Estimation, Potential NOI and more
View Realmo Analytics
Market
Vacancy Rate% for Multifamily in Northeast region
Frequently Asked Questions
What type of property is this?
Duplex - Corner two-family residence with separate basement access, private driveway, and three-car parking.
Where is this duplex located?
The property is located at 4423 9th Avenue Brooklyn, NY.
What is the asking price?
The asking price for this property is $2,895,000.
What are key features of this property?
This property features: 2,840‑square‑foot duplex on a 25x100 lot; 20x71 house size with corner, semi‑detached brick construction; Full finished basement with separate entrances
