Three-Unit Colonial
New
For Sale
$1,688,000
343 Roslyn Avenue, Carle Place, NY 11514
Residential Income, Carle Place, NY
Property Size3,860 SF
Lot Size0.11 Acres
Price / SF$437.31
Days on Market2
Property Features for 343 Roslyn Avenue
General Information
Property type
Residential Multi Family
Property subtype
Triplex
Bedrooms
8
Bathrooms
4
Full bathrooms
4
Rooms
Bedroom 7, Bedroom 1, Bathroom 2, Bedroom 5, Bathroom 4, Basement, Bathroom 3, Bedroom 4, Bedroom 2, Bedroom 3, Bedroom 6, Bathroom 1, Bedroom 8
Parking
4
Parking features
Driveway
Interior features
First Floor Bedroom, First Floor Full Bath, Eat-in Kitchen
Basement
Partial
Elementary school
Rushmore Avenue School
Middle school
Carle Place Middle Senior High Sch
High school
Carle Place Middle Senior High Sch
Elementary school district
Carle Place
Middle school district
Carle Place
High school district
Carle Place
Directions
Rushmore Avenue to Roslyn Avenue and #343
Standard status
Active
APN
2289-10-012-00-0023-0
Lot size
0.11 Acres
Taxes and HOA fees
Tax Year
2026
Tax Annual Amount
16242
Utilities
Sewer type
Public Sewer
Heating system
Natural Gas, Hot Water(Heating)
Cooling system
Multi Units
Water source
Public
Building Details
Year built
1926
Number of units
3
Building materials
Aluminum Siding
Architectural style
Colonial
Listing Agency:
Douglas Elliman Real Estate
(516) 759-0400
Listed By:
Peggy Carillo GRI SFR · License #30CA0627622
(516) 984-1115
Added: Aug 20
Changed: Aug 21
Last Checked: Aug 21 at 7:06PM
MLS# 1038554
Copyright © 2026 OneKey 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 three-unit property comprises two residences with 3,860 square feet of total living area. The primary structure contains two separate two-bedroom units, while the second home offers four bedrooms plus a computer room or office. Interior features include an eat-in kitchen, first-floor bedroom, and first-floor full bath. The 1926 Colonial has aluminum siding, natural-gas hot-water heat, multi-unit cooling, and a basement.
The property occupies a 50-by-100-foot lot at 343 Roslyn Avenue in Carle Place, with driveway parking and public water and sewer. The LIRR station is approximately 0.5 miles away, with major highways and shopping also nearby.
The property occupies a 50-by-100-foot lot at 343 Roslyn Avenue in Carle Place, with driveway parking and public water and sewer. The LIRR station is approximately 0.5 miles away, with major highways and shopping also nearby.
Key Highlights
- Three‑unit setup across two residences with 3,860 sq. ft. of living area
- Primary residence includes two separate 2‑bedroom units
- Second residence offers 4 bedrooms and a computer room/office
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
$73,538
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
4.36%
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%
$1,470,760
$1.5M
Cap Rate 7%
$1,050,543
$1.1M
Cap Rate 9%
$817,089
$817.1K
Market Conditions
NOI Build-Up for 3,860 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
$111.2K $28.80/SF
− Vacancy
−$6.1K −$1.58/SF
EGI
$105.1K $27.22/SF
− OpEx
−$31.5K −$8.16/SF
NOI
$73.5K $19.05/SF
Area
Nassau County, NY
Vacancy
5.50%
Lease Rate
$28.80 /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%
$1,470,760
Cap Rate 7%
$1,050,543
Cap Rate 9%
$817,089
Alternative Uses
Best Use
Multifamily LT 5
$1.05M
$919.2K – $1.23M
NOI $73,538 @ 7.0% cap · market cap 4.36%
Second Best
Apartment 5plus
$983.6K
$860.7K – $1.15M
NOI $68,853 @ 7.0% cap · market cap 4.08%
Theoretical Best
Specialty Retail
$2.55M
$2.23M – $2.98M
NOI $178,650 @ 7.0% cap · market cap 10.58%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
3
Residential units
Yes
Paved road access
Location Intelligence
Trade Area within ½ mile
1,540
Businesses Nearby
Explore this area
Business Placement
Demographics for 11514, NY
4,635
Population
1,758
Households
2.6
Avg Household Size
43
Median Age
50%
College-Educated
93%
High-School Grad
0.9 sq mi
ZIP Area
5,150
Density / Sq Mi
$136,125
Median Household Income
$77,358
Median Earnings
$2,302
Median Rent
$713,700
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?
Triplex - Two residences on one parcel provide a three-unit residential income configuration with driveway parking and public utilities.
Where is this triplex located?
The property is located at 343 Roslyn Avenue Carle Place, NY.
What is the asking price?
The asking price for this property is $1,688,000.
What are key features of this property?
This property features: Three‑unit setup across two residences with 3,860 sq. ft. of living area; Primary residence includes two separate 2‑bedroom units; Second residence offers 4 bedrooms and a computer room/office
