New Construction Duplex with
For Sale
$899,000
33 Keen Court, Brooklyn, NY 11229
Residential, Duplex, Brooklyn, NY
Property Size2,025 SF
Lot Size0.03 Acres
Price / SF$443.95
Days on Market304
Property Features for 33 Keen Court
General Information
Property type
Residential
Property subtype
Duplex
Zoning
Rx4
Bedrooms
3
Bathrooms
3
Full bathrooms
2
Half bathrooms
1
Rooms
Bathroom 3, Bedroom 1, Bedroom 2, Bedroom 3, Bathroom 1, Bathroom 2
Patio and Porch features
Porch
Interior features
A/C Unit, Central Air, Central Air - Split, Dishwasher, Dryer, Garage Door Opener(s), Laundry Area, Microwave, Porch, Refrigerator
Basement
Full, Finished
Subdivision
Gerritsen Beach
Standard status
Active
Size
2,025 SF
Lot size
0.03 Acres
Taxes and HOA fees
Tax Annual Amount
5453
Amenities
balcony
private backyard
laundry room
Building Details
Year built
2024
Floors in Building
3
Flooring type
Granite, Hardwood
Architectural style
Other
Listing Agency:
Reliable Sell & Buy Realty Inc
(718) 265-0066
Listed By:
Mark Geller
(917) 588-0099
Added: Nov 8, 2025
Changed: Sep 6
Last Checked: Sep 8 at 12:06PM
MLS# 497212
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.
Completed in 2024, this 2,025-square-foot duplex spans three floors and includes three bedrooms and three bathrooms. The design incorporates high ceilings, hardwood flooring on the upper levels, granite finishes, triple-pane sound-attenuating windows, and radiant heated floors. A multi-zone HVAC system provides room-by-room central cooling, while foam insulation, LED lighting, a heat pump, and a heat exchanger support energy-efficient operation.
The lower level provides additional living area with two entrances and can accommodate an office or family room. Interior features include a second-floor laundry area, walk-in closet, modern Samsung appliances, and a balcony connected to the living room. Exterior amenities include a terrace, porch, private backyard, garage, and driveway with two private parking areas. The property is zoned Rx4 and occupies 0.032 acres.
The lower level provides additional living area with two entrances and can accommodate an office or family room. Interior features include a second-floor laundry area, walk-in closet, modern Samsung appliances, and a balcony connected to the living room. Exterior amenities include a terrace, porch, private backyard, garage, and driveway with two private parking areas. The property is zoned Rx4 and occupies 0.032 acres.
Key Highlights
- 2024 construction with 2,025 square feet across three floors
- Three bedrooms and three bathrooms
- Radiant heated floors and multi‑zone HVAC with room‑by‑room cooling control
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
$70,919
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
7.89%
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%
$1,418,380
$1.4M
Cap Rate 7%
$1,013,129
$1.0M
Cap Rate 9%
$787,989
$788.0K
Market Conditions
NOI Build-Up for 2,025 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
$103.3K $51.00/SF
− Vacancy
−$2.0K −$0.97/SF
EGI
$101.3K $50.03/SF
− OpEx
−$30.4K −$15.01/SF
NOI
$70.9K $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%
$1,418,380
Cap Rate 7%
$1,013,129
Cap Rate 9%
$787,989
Alternative Uses
Best Use
Multifamily LT 5
$1.01M
$886.5K – $1.18M
NOI $70,919 @ 7.0% cap · market cap 7.89%
Second Best
Apartment 5plus
$883.2K
$772.8K – $1.03M
NOI $61,821 @ 7.0% cap · market cap 6.88%
Theoretical Best
Specialty Retail
$1.68M
$1.47M – $1.96M
NOI $117,369 @ 7.0% cap · market cap 13.06%
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
557
Businesses Nearby
Explore this area
Business Placement
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
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 - New construction features radiant floors, multi-zone HVAC, and energy-efficient windows.
Where is this duplex located?
The property is located at 33 Keen Court Brooklyn, NY.
What is the asking price?
The asking price for this property is $899,000.
What are key features of this property?
This property features: 2024 construction with 2,025 square feet across three floors; Three bedrooms and three bathrooms; Radiant heated floors and multi‑zone HVAC with room‑by‑room cooling control
