# 55 Carleton Avenue, East Islip, NY 11730

> **TL;DR:** commercial, $1,650,000, built 1975.
> A/C. Est. $7,150/mo. Listed 220 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $1,650,000 |
| Year Built | 1975 |
| Lot Size | 42,689 sqft (0.98 acres) |
| Stories | 1 |
| Property Type | Commercial (Office) |
| Status | For Sale |
| Days on Market | 220 |

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Mortgage (20% down, 6.5%) | $7,150 |
| **Total** | **$7,150** |

## Key Amenities

- A/C

## Property Highlights

- Built in 1975
- 0.98 acre lot
- 18 parking spaces

## Description

### Agent Description
55 Carleton Avenue presents a rare chance to acquire a high-visibility, 0.98-acre commercial property on Carleton Avenue-the main thoroughfare into East Islip. Zoned GSD, this site is ideally suited for office, medical, or veterinary use, offering exceptional exposure and accessibility. This unique opportunity allows for expansion of additional space of up to 11,000 sq. ft. or redevelop the entire site for your new building up to 17,000 ft. sq. Only two miles from the Federal Court House and 2.5 miles from Northwell South Shore University Hospital with easy access from Sunrise Hwy and Southern State Parkway. The East Islip area boasts strong commercial activity and highly desirable demographics, making this a prime location for professional services seeking long-term growth and visibility.

## Location

- **Address:** 55 Carleton Avenue, East Islip, NY 11730
- **County:** Suffolk County

## Listing Agent

- **Name:** Joseph E. Donaghy
- **Brokerage:** Marylou Swan Realty Corp
- **Phone:** 6317749671
- **Email:** joe@swanrealtycorp.com

## Primary Photo

![55 Carleton Avenue - Primary Photo](http://lh.rdcpix.com/76b29f1a722245d3353abe996ef072e7l-f540240713r.jpg)

*15 total photos available on [listing page](https://www.propertysimple.com/listing/55-carleton-avenue-east-islip-ny-11730-y928396)*

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**MLS#:** 928396 | **Updated:** 2026-06-19
**Source:** listhub

*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.*

[View on PropertySimple](https://www.propertysimple.com/listing/55-carleton-avenue-east-islip-ny-11730-y928396)

---

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