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Renovated Office Building

311 Barnum Avenue, Port Jefferson, NY 11777

For Sale
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Renovated office property with private parking, storage, and a flexible professional layout.

Property SizeContact for details
Days on Market56

Property Features for 311 Barnum Avenue

General Information

Standard status Active
Property subtype Office
Listing Agency: Reliant Realty Group LLC
Listed By: Robert Gitto · License #NY
Source: Crexi
Added: Sep 15 Changed: Oct 25 Last Checked: Nov 8 at 9:03AM

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 Reliant Realty Group LLC

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Investment Insights

Based on property information with market context.

Located at 311 Barnum Avenue in Port Jefferson Village, this renovated office building offers a practical layout for professional or medical use. The interior includes five private offices, a conference room, a full eat-in kitchen, and two handicap-accessible restrooms. Additional utility comes from abundant dry storage and an accessible attic that provides further storage capacity.

The property includes 25 private on-site parking spaces and is positioned within Port Jefferson Village, near its business community, restaurants, shops, and other village amenities. Its existing office configuration and renovated condition support an owner-user seeking functional space with limited additional improvements, while the flexible arrangement may also suit other qualified commercial uses identified for the property.

Key Highlights

  • Five private offices plus a spacious conference room
  • 25 private on‑site parking spaces
  • Two handicap‑accessible restrooms

Property Analytics

Who owns this building? See the owner, sales and loan history
Open Analytics

Current Use

East End Hand ... Physician Optical Outfitters Ophthalmologist Village Eye Care Ophthalmologist Cossari Alfred J ... Ophthalmologist Jiri Mladek, OD Physician

Suggested Use

Top Pick Building Supply Grocery & Convenience Store Auto Repair Shop Storage Facility (Bike/Boat/Book/etc) Store HVAC Service

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Location Intelligence

Trade Area within ½ mile

804
Businesses Nearby

Demographics for 11777, NY

9,346
Population
3,893
Households
2.4
Avg Household Size
46
Median Age
69%
College-Educated
97%
High-School Grad
4.4 sq mi
ZIP Area
2,124
Density / Sq Mi
$148,519
Median Household Income
$72,042
Median Earnings
$2,261
Median Rent
$655,900
Median Home Value
Check the figures for this property Cap Rate, Value Estimation, Potential NOI and more
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Market

Average Price Trend$/SF for Office buildings in Suffolk County, NY

$306 Jul
$285 Aug
$371 Sep
$337 Oct

Properties on Market for Office buildings in Suffolk County

Jul
Aug
Sep
Oct

Vacancy Rate% for Office in Northeast region

13.1% 2019
15.4% 2020
17.6% 2021
19.1% 2022
20.2% 2023
20.9% 2024
19.9% 2025

Frequently Asked Questions

What type of property is this?
Office building - Renovated office property with private parking, storage, and a flexible professional layout.
Where is this office building located?
The property is located at 311 Barnum Avenue Port Jefferson, NY.
What is the asking price?
The asking price for this property is $2,200,000.
What are key features of this property?
This property features: Five private offices plus a spacious conference room; 25 private on‑site parking spaces; Two handicap‑accessible restrooms
(631) 509-0077 · Office Call to check price and availability
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