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Duplex with Finished Basement
For Sale
$2,390,000

2398 E 21st Street, Brooklyn, NY 11229

Residential, Brooklyn, NY

Property Size2,786 SF
Lot Size0.07 Acres
Price / SF$857.86
Days on Market100

Property Features for 2398 E 21st Street

General Information

Property type Residential Multi Family
Property subtype Other
Zoning R4
Bedrooms 6
Bathrooms 4
Full bathrooms 4
Rooms Bathroom 1, Bathroom 2, Bedroom 6, Bedroom 3, Bathroom 3, Bedroom 5, Bedroom 2, Bedroom 4, Bedroom 1, Bathroom 4
Interior features Refrigerator, Stove
Basement Full, Finished
Subdivision Sheepshead Bay
Standard status Active
Size 2,786 SF
Lot size 0.07 Acres

Taxes and HOA fees

Tax Annual Amount 10323

Building Details

Year built 1935
Floors in Building 2
Number of units 2
Flooring type Hardwood, Tile
Building materials Brick
Roof type Shingle
Listing Agency: Tiger Realty
Listed By: Hang (Tyler) Chen · License #HC3855
Added: Jul 8 Changed: Oct 13 Last Checked: Oct 15 at 11:06AM
MLS# 502806

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 semi-detached duplex contains two residential units, each arranged with three bedrooms and two full bathrooms. The property provides six bedrooms and four full bathrooms overall, along with a full finished basement that adds recreation, storage, or flexible-use space. Brick construction, shingle roofing, tile and hardwood flooring, and included refrigerator and stove appliances are among the existing features. The home was built in 1935 and is zoned R4.

Located at 2398 E 21st Street in Brooklyn, the property includes a private driveway with parking for two vehicles. Shopping, supermarkets, restaurants, schools, parks, public transportation, and major roadways are identified in the surrounding area. The 2,786-square-foot building occupies a 0.0747-acre lot.

Key Highlights

  • 2,786‑square‑foot duplex with six bedrooms and four full bathrooms
  • Two units, each with 3 bedrooms and 2 full bathrooms
  • Full finished basement for recreation, storage, or flexible use

Financial Insights

Estimated NOI and Cap Rate

NOI / Yr
$97,570
Cap Rate
4.08%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,951,400 $2.0M
Cap Rate 7%
$1,393,857 $1.4M
Cap Rate 9%
$1,084,111 $1.1M
Market Conditions
NOI Build-Up for 2,786 SF
Gross rent
$142.1K $51.00/SF
− Vacancy
−$2.7K −$0.97/SF
EGI
$139.4K $50.03/SF
− OpEx
−$41.8K −$15.01/SF
NOI
$97.6K $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 Rate 5%
$1,951,400
Cap Rate 7%
$1,393,857
Cap Rate 9%
$1,084,111

Alternative Uses

Best Use
Multifamily LT 5
$1.39M
$1.22M – $1.63M (±1% cap)
NOI $97,570 @ 7.0% cap · market cap 4.08%
Second Best
Apartment 5plus
$1.22M
$1.06M – $1.42M (±1% cap)
NOI $85,054 @ 7.0% cap · market cap 3.56%
Theoretical Best
Specialty Retail
$2.31M
$2.02M – $2.69M (±1% cap)
NOI $161,477 @ 7.0% cap · market cap 6.76%
Zoning and permitted uses should be independently verified with authorities. How Realmo checks its estimates

Property Analytics

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Current Use

Duplexes

Suggested Use

Top Pick Real Estate Agency Parking Lot & Garage Hotel & Motel Bar & Pub Catering Service Nursing Home

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

2
Residential units

Location Intelligence

Trade Area within ½ mile

5,659
Businesses Nearby

Demographics for 11229, NY

83,669
Population
33,353
Households
2.5
Avg Household Size
40
Median Age
41%
College-Educated
88%
High-School Grad
2.0 sq mi
ZIP Area
41,835
Density / Sq Mi
$72,556
Median Household Income
$52,948
Median Earnings
$1,666
Median Rent
$812,200
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

4% 2022
4.6% 2023
5.3% 2024
5.6% 2025
Rey
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Frequently Asked Questions

What type of property is this?
Duplex - Semi-detached brick residence offers two three-bedroom units, finished lower-level space, and private off-street parking.
Where is this duplex located?
The property is located at 2398 E 21st Street Brooklyn, NY.
What is the asking price?
The asking price for this property is $2,390,000.
What are key features of this property?
This property features: 2,786‑square‑foot duplex with six bedrooms and four full bathrooms; Two units, each with 3 bedrooms and 2 full bathrooms; Full finished basement for recreation, storage, or flexible use
More about this property
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