Brick Duplex with Detached
For Sale
$700,000
621 E 43rd Street, Brooklyn, NY 11203
Residential, Duplex, Brooklyn, NY
Property Size1,280 SF
Lot Size0.05 Acres
Price / SF$546.88
Days on Market50
Property Features for 621 E 43rd Street
General Information
Property type
Residential
Property subtype
Duplex
Zoning
R4
Bedrooms
3
Bathrooms
3
Full bathrooms
2
Rooms
Bathroom 3, Bedroom 2, Bathroom 2, Bathroom 1, Bedroom 1, Bedroom 3
Interior features
A/C Unit - Window, Alarm, Refrigerator, Stove
Basement
Full
Subdivision
East Flatbush
Standard status
Active
Size
1,280 SF
Lot size
0.05 Acres
Taxes and HOA fees
Tax Annual Amount
6351
Amenities
private backyard
private driveway
detached garage
full basement
Building Details
Year built
1930
Floors in Building
2
Flooring type
Carpet
Building materials
Brick
Architectural style
Other
Listing Agency:
Gosen Properties
(718) 704-0494
Listed By:
Emmanuel Victor
(718) 598-7374
Added: Aug 13
Changed: Sep 19
Last Checked: Oct 1 at 5:06PM
MLS# 503807
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 1,280-square-foot duplex is a brick-built residence constructed in 1930 and positioned on a 0.0536-acre lot. The layout includes three bedrooms, formal living and dining rooms, a separate kitchen with access to the backyard, and a full basement with a rear entrance. Window-unit A/C, a refrigerator, a stove, an alarm system, and carpeted flooring are present. Exterior features include a private backyard, private driveway, and detached garage. The property requires updating and interior improvements, offering a buyer the opportunity to customize the residence while retaining its existing configuration. R4 zoning is identified for the property.
Key Highlights
- 3‑bedroom duplex with 1,280 square feet
- Brick construction dating to 1930
- Full basement with rear access
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
$44,828
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
6.40%
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%
$896,560
$896.6K
Cap Rate 7%
$640,400
$640.4K
Cap Rate 9%
$498,089
$498.1K
Market Conditions
NOI Build-Up for 1,280 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
$65.3K $51.00/SF
− Vacancy
−$1.2K −$0.97/SF
EGI
$64.0K $50.03/SF
− OpEx
−$19.2K −$15.01/SF
NOI
$44.8K $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%
$896,560
Cap Rate 7%
$640,400
Cap Rate 9%
$498,089
Alternative Uses
Best Use
Multifamily LT 5
$640.4K
$560.4K – $747.1K
NOI $44,828 @ 7.0% cap · market cap 6.40%
Second Best
Apartment 5plus
$558.2K
$488.5K – $651.3K
NOI $39,077 @ 7.0% cap · market cap 5.58%
Theoretical Best
Specialty Retail
$1.06M
$927.4K – $1.24M
NOI $74,189 @ 7.0% cap · market cap 10.60%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
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Current Use
Lease Details
1
Residential units
Location Intelligence
Trade Area within ½ mile
1,913
Businesses Nearby
Explore this area
Business Placement
Demographics for 11203, NY
81,824
Population
33,434
Households
2.4
Avg Household Size
41
Median Age
26%
College-Educated
88%
High-School Grad
2.1 sq mi
ZIP Area
38,964
Density / Sq Mi
$68,028
Median Household Income
$47,302
Median Earnings
$1,566
Median Rent
$677,700
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 - Two-level residence with a private driveway, backyard, full basement, and separate kitchen with direct outdoor access.
Where is this duplex located?
The property is located at 621 E 43rd Street Brooklyn, NY.
What is the asking price?
The asking price for this property is $700,000.
What are key features of this property?
This property features: 3‑bedroom duplex with 1,280 square feet; Brick construction dating to 1930; Full basement with rear access
