When was property at 91 Union Avenue built and last sold?

The property at 91 Union Avenue was built in and last sold on Feb 12, 2016 for $427,500.

How much is this home worth?

The estimated value of the home located at 91 Union Avenue is $747,448.

What are some comparable homes to 91 Union Avenue?

There are currently no comparable homes to 91 Union Avenue.

Islip

11751

Islip

Undisclosed Address

$427,500

● House - Off Market

Undisclosed Address

Islip, NY 11751

4 Beds

2 Baths

$791,434

RealtyHop Estimate

75.92%

Since Mar 1, 2016

National-US

Primary Model

About This Property

Beautifully Remodeled Farm House Col In Aaa Loc! Over Sized Property. Dream Kit With Brand New Samsung Stainles Steel Appliances, Brand New Lg Washer And Dryer, Designer Painted And Trim. Entertainers Delight Sun Splashed Open Floor Plan!, Huge Party Deck, Beaut New Flooring 2 Gorgeous Brand New Baths!,New 200 Amp Svc And Blah Blah Blah, Just Come See For For Yourself!, Additional information: Appearance:Superb/New,Separate Hotwater Heater:Y

Unit Size

Days on Market

Land Size

0.21 acres

Price per sqft

Property Type

House

Property Taxes

$792

HOA Dues

Year Built

Payment Calculator

Cap Rate Calculator

Last updated: 4 months ago (OneKey MLS #KEYL2807116)

Price History

Date / Event	Date	Event
Aug 13, 2025	Sold	Premium
Sold
Apr 6, 2025	In contract	-
In contract
Mar 17, 2025	Listed by Michael J Watts & Assoc Inc	$729,999
Listed by Michael J Watts & Assoc Inc

	This beautifully restored Colonial is located in a prime residential block, just south of Montauk and in close proximity to the vibrant Main St. area, offering a variety of restaurants, charming boutiques, and local beaches. This home features a bright and open floor plan, with an updated eat-in kitchen and stainless steel appliances. With 4 spacious bedrooms and 2 full baths, this property offers comfort and style. The meticulously maintained grounds include new brick pavers and a charming gazebo, perfect for outdoor relaxation and entertainment. A true gem in a highly desirable area!
Mar 25, 2016	Sold	Premium
Sold
Feb 15, 2016	Sold	Premium
Sold
Oct 29, 2015	Listed by Realty 3000 Properties Inc	$449,890
Listed by Realty 3000 Properties Inc
Aug 4, 2015	Sold	Premium
Sold

Property Highlights

Building Info

Overview

General

Bedroom Count: 0

Building Condition: 0
Building Quality: 0
Construction Type: 0
Building Style: 0
Exterior Walls Type: 0
Interior Walls Type: 0
Roof Shape Type: 0
Roof Cover Type: 0
Floor Cover: 0
Basement Type: 0
Basement Area: 0
Garage Type: 0
Parking Space Count: 0
Patio Type: 0
Porch Type: 0
Pool Type: 0

Dimensions

Lot Size Square Feet: 9,148

Lot Size Frontage Feet: 680
Total Building Area: 0
Building Area: 0

Heating and Cooling

Air Conditioning: 0

Heating: 0
Heating Fuel Type: 0

Utilities

Sewer System: 0

Water Service: 0

Building

Building Type: 0

Property Class: R
Land Acres: 0000000210
Standard Land Use Code: 1001
County Land Use Code: 210
Legal Description 1: X2218167Y183388 T059H00000000H

Neighborhood

School District Name: Islip Union Free School District

School Tax School District: ISLIP
Census Tract: 147402

Zoning

Zoning: B

Geography

District: 0500-3

Section: 50.39
Parcel: 0500-396.00-04.00-073.000
Block: 6000
Lot: 400.073
Municipality: ISLIP
Latitude: 40.7263
Longitude: -73.2126

Address

Full Address: 91 Union Ave

Address - House Number: 91
Address - Street Name: Union
Address - Suffix Type: Ave
State: NY
City Name: Islip
Carrier Code: C018
4-Digit Zip Code: 3919
Zip Code: 11751

Valuation

Tax

Tax Year: 2023

Tax Amount: $1,154,085
Tax Rate Code Area: 472802

Appraisal Valuation

Standard Deviation: 0.2302

Valuation Date: Feb 14, 2024
Confidence Score: 68
Final Value: 679,298
High Value: 835,675
Low Value: 522,922

Market Valuation

Market Total Value: $478,022

Market Land Value: $142,857
Market Improvement Value: $335,165

Assessments Valuation

Assessed Year: 2023

Assessed Total Value: $34,800
Assessed Land Value: $10,400
Assessed Improvements Value: $24,400

Sales

Current Sale Contract Date: Feb 12, 2016

Current Sale Recording Date: Mar 25, 2016
Current Sale Price:

Premium
Current Sale Document Type: 12
Previous Sale Recording Date: Aug 04, 2015
Previous Sale Contract Date: Jul 16, 2015
Previous Sale Amount: $180,000
Previous Sale Document Type: 12

Last Sale Mortgage

First Mortgage Lender:

Premium

First Mortgage Transaction Date:

Premium
First Mortgage Loan Amount:

Premium
First Mortgage Terms:

Premium
First Mortgage Loan Type:

Premium
First Mortgage Loan Due Date:

Premium

Previous Mortgages

Previous Mortgage Lender:

Premium

Previous Mortgage Transaction Date:

Premium
Previous Mortgage Loan Amount:

Premium
Previous Mortgage Term:

Premium
Previous Mortgage Loan Type:

Premium

Data used for valuation calculations is provided by RealtyHop, and other third party sources

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Comparables

About Islip

Stats & Trends

Median Asking:

$644,500

Sale Price/ft²

$407

Below Asking

0.01%

Average Days on Market

Average Home Size

1481 ft²

Average Home Age

66.7 years

Currently For Sale

36 Listings

Based on RH Advisors, Inc. calculations of home data from MLS and/or public records.

Similar Homes for Sale

Currently no similar homes around

Nearby Rentals

Unit for rent at 584 Main Street, Islip, NY, 11751

$3,150 /mo

1 Bed
1 Bath
620 ft²

584 Main Street #1, Islip, NY, 11751 Listing by Sean Darbyshire RENE

Unit for rent at 2 Somerset Avenue, East Islip, NY, 11730

$1,900 /mo

Studio
1 Bath
198 ft²

2 Somerset Avenue #APT3, East Islip, NY, 11730 Listing by Jamie C. Winkler

Unit for rent at 407 East Main Street, Bay Shore, NY, 11706

$2,445 /mo

1 Bed
1 Bath
600 ft²

407 East Main Street #4075B, Bay Shore, NY, 11706 Listing by Michelle Holmes

Rentals Near You

Click here to view more rentals in the neighborhood.

Last Updated: 4 months ago
Data Source: OneKey MLS

Undisclosed Address

About This Property

Price History

Property Highlights

Building Info

Overview

Building

Neighborhood

Zoning

Geography

Valuation

Comparables

About Islip

Stats & Trends

Similar Homes for Sale

Nearby Rentals

Frequently Asked Questions