Brick Quadplex with Finished
For Sale
$1,250,000
643 Osborn Street, Brooklyn, NY 11212
Residential Income, Brooklyn, NY
Property Size3,075 SF
Lot Size0.06 Acres
Price / SF$406.50
Days on Market80
Property Features for 643 Osborn Street
General Information
Property type
Residential Multi Family
Property subtype
Other
Zoning description
Residential
Bedrooms
10
Bathrooms
4
Full bathrooms
4
Rooms
Bedroom 3, Bedroom 9, Bedroom 2, Bedroom 1, Bathroom 3, Bathroom 1, Bathroom 2, Bathroom 4, Bedroom 7, Bedroom 5, Bedroom 10, Bedroom 4, Bedroom 6, Bedroom 8
Subdivision
Brownsville
Standard status
Active
Size
3,075 SF
Lot size
0.06 Acres
Taxes and HOA fees
Tax Annual Amount
9943
Utilities
Water source
Public
Building Details
Year built
1930
Floors in Building
2
Flooring type
Hardwood
Building materials
Brick
Architectural style
Other
Listing Agency:
TWELVE STONES REALTY
(973) 873-8444
Listed By:
Avraham Birnbaum
(347) 876-9337
Added: Jul 13
Changed: Sep 17
Last Checked: Sep 30 at 2:06PM
MLS# 11908939
Copyright © 2026 My State MLS. 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 Brooklyn quadplex contains four residential units: three apartments with two bedrooms and one apartment with three bedrooms, each with one bathroom. The finished basement provides additional income-generating space. The 3,075-square-foot brick building was constructed in 1930 and includes hardwood flooring, public water service, and an R6 zoning designation. The property occupies a 25-foot by 100-foot lot.
Located on Osborn Street in Brooklyn, the property is near public transportation, schools, shopping, parks, and neighborhood amenities. Government-assisted rental programs are currently in place, and the asset carries a projected 10.65% cap rate.
Located on Osborn Street in Brooklyn, the property is near public transportation, schools, shopping, parks, and neighborhood amenities. Government-assisted rental programs are currently in place, and the asset carries a projected 10.65% cap rate.
Key Highlights
- Four‑unit multifamily building with three 2‑bedroom apartments and one 3‑bedroom apartment
- Finished basement provides additional income‑generating space
- 3,075 SF brick building constructed in 1930
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
$107,692
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
8.62%
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%
$2,153,840
$2.2M
Cap Rate 7%
$1,538,457
$1.5M
Cap Rate 9%
$1,196,578
$1.2M
Market Conditions
NOI Build-Up for 3,075 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
$156.8K $51.00/SF
− Vacancy
−$3.0K −$0.97/SF
EGI
$153.8K $50.03/SF
− OpEx
−$46.2K −$15.01/SF
NOI
$107.7K $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%
$2,153,840
Cap Rate 7%
$1,538,457
Cap Rate 9%
$1,196,578
Alternative Uses
Best Use
Multifamily LT 5
$1.54M
$1.35M – $1.79M
NOI $107,692 @ 7.0% cap · market cap 8.62%
Second Best
Apartment 5plus
$1.34M
$1.17M – $1.56M
NOI $93,877 @ 7.0% cap · market cap 7.51%
Theoretical Best
Specialty Retail
$2.55M
$2.23M – $2.97M
NOI $178,227 @ 7.0% cap · market cap 14.26%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
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Current Use
Lease Details
4
Residential units
Location Intelligence
Trade Area within ½ mile
2,360
Businesses Nearby
Explore this area
Business Placement
Demographics for 11212, NY
91,574
Population
34,782
Households
2.6
Avg Household Size
36
Median Age
16%
College-Educated
78%
High-School Grad
1.5 sq mi
ZIP Area
61,049
Density / Sq Mi
$40,060
Median Household Income
$32,553
Median Earnings
$1,231
Median Rent
$549,400
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?
Quadplex - Four apartments include three two-bedroom layouts and one three-bedroom layout.
Where is this quadplex located?
The property is located at 643 Osborn Street Brooklyn, NY.
What is the asking price?
The asking price for this property is $1,250,000.
What are key features of this property?
This property features: Four‑unit multifamily building with three 2‑bedroom apartments and one 3‑bedroom apartment; Finished basement provides additional income‑generating space; 3,075 SF brick building constructed in 1930
