Detached Brick
For Sale
$1,799,000
3821 Avenue S, Brooklyn, NY 11234
MULTI_FAMILY - Brooklyn, NY
Property Size4,880 SF
Lot Size0.09 Acres
Price / SF$368.65
Days on Market52
Property Features for 3821 Avenue S
General Information
Property type
Residential Multi Family
Property subtype
Other
Bedrooms
7
Bathrooms
6
Full bathrooms
4
Rooms
Bathroom 5, Bathroom 6, Bedroom 2, Bedroom 1, Bathroom 2, Bathroom 4, Bedroom 7, Bedroom 5, Bedroom 6, Bathroom 3, Bedroom 3, Bedroom 4, Bathroom 1
Patio and Porch features
Porch, Deck
Interior features
Central Air, Deck, Dishwasher, Dryer, Fireplace, Laundry Area, Microwave, Porch, Refrigerator, Stove, Washer
Fireplace
1
Basement
Finished
Subdivision
Marine Park
Standard status
Active
Size
4,880 SF
Lot size
0.09 Acres
Taxes and HOA fees
Tax Annual Amount
15411
Amenities
cathedral ceiling
fireplaces
stained-glass windows
gourmet kitchen
Jacuzzi tub
steam sauna
private library
garage
landscaped backyard
Building Details
Year built
1940
Floors in Building
4
Number of units
4
Flooring type
Hardwood, Tile
Building materials
Brick
Roof type
Slate
Listing Agency:
RE/MAX Edge · RE/MAX International
(718) 612-3088
Listed By:
Michelle J. Zhang · License #MZ4172
(718) 612-3088
Added: Jul 4
Changed: Aug 15
Last Checked: Aug 24 at 7:06PM
MLS# 502772
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 fully detached two-family residence at 3821 Avenue S is built of solid brick and contains Approx. 4,880 Sq. Ft. on an approximately 40' x 100' corner lot. The home includes multiple living and dining areas, renovated kitchens, seven bedrooms, six bathrooms, hardwood and tile flooring, fireplaces, central air, laundry equipment, and a slate roof. A private driveway, garage, brick perimeter wall, porch, deck, and landscaped backyard add substantial exterior functionality.
Interior details include a 25-foot cathedral ceiling, custom millwork, decorative moldings, stained-glass windows, hardwood staircases, and multiple fireplaces. The upper levels include primary-suite accommodations with marble bathrooms, Jacuzzi tubs, separate showers, and a private steam sauna. The property also includes a library or bedroom, storage space, and a separate entrance that supports the existing two-family configuration. Built in 1940.
Interior details include a 25-foot cathedral ceiling, custom millwork, decorative moldings, stained-glass windows, hardwood staircases, and multiple fireplaces. The upper levels include primary-suite accommodations with marble bathrooms, Jacuzzi tubs, separate showers, and a private steam sauna. The property also includes a library or bedroom, storage space, and a separate entrance that supports the existing two-family configuration. Built in 1940.
Key Highlights
- Approx. 4,880 Sq. Ft. on an approximately 40' * 100' corner lot
- Fully detached two‑family solid‑brick residence
- Seven bedrooms and six bathrooms
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
$148,981
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
8.28%
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%
$2,979,620
$3.0M
Cap Rate 7%
$2,128,300
$2.1M
Cap Rate 9%
$1,655,344
$1.7M
Market Conditions
NOI Build-Up for 4,880 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
$276.4K $56.64/SF
− Vacancy
−$5.5K −$1.13/SF
EGI
$270.9K $55.51/SF
− OpEx
−$121.9K −$24.98/SF
NOI
$149.0K $30.53/SF
Area
Brooklyn, NY
Vacancy
2.00%
Lease Rate
$56.64 /SF/Yr
Expense Ratio
45.00%
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%
$2,979,620
Cap Rate 7%
$2,128,300
Cap Rate 9%
$1,655,344
Alternative Uses
Best Use
Multifamily LT 5
$2.44M
$2.14M – $2.85M
NOI $170,906 @ 7.0% cap · market cap 9.50%
Second Best
Apartment 5plus
$2.13M
$1.86M – $2.48M
NOI $148,981 @ 7.0% cap · market cap 8.28%
Theoretical Best
Specialty Retail
$4.04M
$3.54M – $4.71M
NOI $282,845 @ 7.0% cap · market cap 15.72%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
2,300
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
Market
Vacancy Rate% for Multifamily in Northeast region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Duplex - Corner-lot two-family residence with a private driveway, garage, landscaped backyard, and separate living areas.
Where is this duplex located?
The property is located at 3821 Avenue S Brooklyn, NY.
What is the asking price?
The asking price for this property is $1,799,000.
What are key features of this property?
This property features: Approx. 4,880 Sq. Ft. on an approximately 40' * 100' corner lot; Fully detached two‑family solid‑brick residence; Seven bedrooms and six bathrooms
