Two-Unit Duplex with Private
New
For Sale
$799,000
21 Carleton Ave, East Islip, NY 11730
Separate boilers and split HVAC systems serve the residences, while the driveway accommodates multiple vehicles.
Property SizeContact for details
Days on Market2
Property Features for 21 Carleton Ave
General Information
Standard status
Active
Total Parking Spaces
6
Property subtype
Multi-Family
Units
Unit Mix
1 x 3BR, 1 x 1BR
Multifamily Units
2
Additional Details
Public Transit
Yes
Building Details
Year Built
1900
Buildings
1
Listing Agency:
Century 21 Monticello Realty
Listed By:
Patricia V. Rodriguez · License #40RO0824403
(718) 804-5757
Source:
Realtyconnectusa
Added: Sep 26
Last Checked: Sep 26 at 2:42PM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Century 21 Monticello Realty
Investment Insights
Based on property information with market context.
Built in 1900, this duplex at 21 Carleton Ave in East Islip contains two separate residences. The first-floor unit has three bedrooms, while the second-floor unit has one bedroom and its own living space. Two boilers and five split HVAC units provide separate heating and cooling. A private driveway offers parking for up to six vehicles.
The property is approximately 10 minutes from the Long Island Rail Road and near major roadways, shopping, supermarkets, restaurants, schools, and parks.
The property is approximately 10 minutes from the Long Island Rail Road and near major roadways, shopping, supermarkets, restaurants, schools, and parks.
Key Highlights
- Two residences: a three‑bedroom first‑floor unit and a one‑bedroom second‑floor unit
- Two separate boilers and five split HVAC units
- Private driveway accommodates up to six vehicles
Property Analytics
Unlock full access to Insights
Subscribe to Realmo Intelligence
Open Analytics
Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
806
Businesses Nearby
Explore this area
Business Placement
Demographics for 11730, NY
14,523
Population
5,230
Households
2.8
Avg Household Size
43
Median Age
39%
College-Educated
95%
High-School Grad
4.5 sq mi
ZIP Area
3,227
Density / Sq Mi
$146,190
Median Household Income
$64,934
Median Earnings
$2,508
Median Rent
$577,600
Median Home Value
Check the figures for this property
Cap Rate, Value Estimation, Potential NOI and more
View Realmo Analytics
Market
Vacancy Rate% for Multifamily in Northeast region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Duplex - Separate boilers and split HVAC systems serve the residences, while the driveway accommodates multiple vehicles.
Where is this duplex located?
The property is located at 21 Carleton Ave East Islip, NY.
What is the asking price?
The asking price for this property is $799,000.
What are key features of this property?
This property features: Two residences: a three‑bedroom first‑floor unit and a one‑bedroom second‑floor unit; Two separate boilers and five split HVAC units; Private driveway accommodates up to six vehicles
