Suffolk County » 11751 » Nassau Ave » 143 Nassau Ave

143 Nassau Avenue, Islip, NY 11751 Property Information

Q: How many residential units does this building have?

This building has 2 residential units and 0 commercial spaces.

Research 100M+ property records powered by:

2000+ governmental and public data sources
80 dedicated analysts and researchers
20+ years of real estate experience

Learn More

Photo & Map Show Hide

Address

Primary address	143 Nassau Avenue, Islip
Zip code	11751
County	Suffolk

Municipality	Islip
Parcel ID	345-1-27

Sales & Tax Overview for 143 Nassau Avenue, Islip

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Property tax	$9,327

Lot & Building Information for 143 Nassau Avenue, Islip

Building class	Two Family Year-Round Residence (220)
Acreage	0.15
Units	2

Zoning, Use & Area Overview

Walk Score

Transit Score

Bike Score

Zoning district	Register
School district	Islip

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Other Property Data for 143 Nassau Avenue, Islip

Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:

• Improvements for 143 Nassau Avenue, Islip , including their type, square footage, grade and when they were built.

• Development maps such as planimetric, zoning, land use and urban landscape maps (building age and stories).

Unlock all property data with a free account.
Sign up

About 143 Nassau Avenue, Islip

What is the assessed value of 143 Nassau Avenue, Islip, NY 11751 and the property tax paid?

Assessed at $29,550, the tax amount paid for 143 Nassau Avenue, Islip, NY 11751 is $9,327.

How many residential units does this building have?

This building has 2 residential unit(s).

Ownership Information

View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.

Commercial Real Estate nearby

Real Estate Reports:

Laura Pop-Badiu, Jul 29, 2026 How to Contact Property Owners: Cold Calling Scripts, Email Templates & Outreach Tips

When it comes to efficiently contacting property owners, the challenge is twofold: First, you need to identify the right owner. Then, you need to reach that owner through the appropriate channel with the right message. Enhanced by effective follow-up tips and tactics, this guide is particularly useful for investors, agents and other real estate professionals who need an effective outreach process.

Lucian Alixandrescu, Jul 28, 2026 Brooklyn Emerges as NYC’s Coworking Growth Engine, Manhattan Rents Cross $100 in the Plaza District

New York City’s office market continued to lead the U.S. in Q2, but internal shifts were most visible in the flex office market. Brooklyn’s coworking inventory grew 6.2% Q-o-Q even as Manhattan’s supply retreated. At the same time, Brooklyn’s asking rents for traditional office leases climbed more than twice as fast as the national average.

Eliza Theiss, Jul 22, 2026 Prices Rise in 32 of NYC’s Leading Neighborhoods as City and Manhattan Hit Record Highs

Q2 2026 saw NYC and Manhattan reach historic highs, with Brooklyn and Queens marking close to new records as well. Meanwhile, Hudson Yards remained at the top, Central Midtown posted its highest price ever and Carroll Gardens marked its third consecutive quarter over $2 million

Research 100M+ property records powered by:

2000+ governmental and public data sources
80 dedicated analysts and researchers
20+ years of real estate experience

Learn More

Past Sales & Property History for 143 Nassau Avenue, Islip

Create a free account to view the complete sales history for 143 Nassau Avenue, Islip, including title documents, transfer conditions, mortgages and liens.

No recorded sales for this property.

More about Suffolk County Property Records

Title Documents for 143 Nassau Avenue, Islip

Data not available for this property.

Property Taxes for 143 Nassau Avenue, Islip

Access detailed property tax data for 143 Nassau Avenue, Islip, NY 11751. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year	2025-2026
Property tax	$9,327
Market value	$416,197
Assessed value	$29,550

More about Suffolk County Property Taxes

Assessment History for 143 Nassau Avenue, Islip

Here's the assessment & property tax history for 143 Nassau Avenue, Islip, including the evolution of the total tax rate and corresponding property tax.

Year	Market value	Assessment value	Total tax rate	Property tax	Year over year change
2025-2026	$416,197	$29,550	31.564	$9,327	+3.54%
2024-2025	$416,197	$29,550	30.486	$9,009	+3.73%
2023-2024	$405,907	$29,550	29.39	$8,685	+1.68%
2022-2023	$356,884	$29,550	28.904	$8,541	+0.07%
2021-2022	$318,426	$29,550	28.884	$8,535	+3.07%

Permits for 143 Nassau Avenue, Islip

The complete history of permits filed for 143 Nassau Avenue, Islip, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.

Data not available for this property.

Risk

Create a free account to unlock extended information for 143 Nassau Avenue, Islip, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).

FEMA flood zone(s)	X (See more on map)

Transportation

Access the detailed traffic volume map for 143 Nassau Avenue, Islip to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

View daily traffic map

Schools

Nearest elementary schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
Wing Elementary School	NR	Public	K-1	379	0.44
St Mary School	NR	Private	PK-8	413	0.82
St Mary School	NR	Private	PK-8	413	0.82
Commack Road Elementary School	3	Public	2-5	397	0.91
Maud S Sherwood Elementary School	6	Public	2-5	335	1.12

Nearest middle schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
Islip Middle School	4	Public	6-8	641	0.77
St Mary School	NR	Private	PK-8	413	0.82
St Patrick School	NR	Private	PK-8	534	1.62
East Islip Middle School	6	Public	6-8	804	1.80
Bay Shore Middle School	5	Public	6-8	1,298	2.24

Nearest high schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
Islip High School	9	Public	9-12	892	0.72
East Islip High School	8	Public	9-12	1,145	1.84
Bay Shore Senior High School	5	Public	9-12	1,910	2.30
MDQ Academy	NR	Private	PK-12	412	3.16
Brentwood High School	3	Public	9-12	4,641	3.56

Neighbors for 143 Nassau Avenue, Islip

Here are the neighbors for 143 Nassau Avenue, Islip.

Address	Square feet	Purchase date	Purchase price
378 Moffitt Blvd, Islip
370 Moffitt Blvd, Islip		01/29/2016
9 William Ave, Islip
34 Columbia St, Islip	1,755	10/20/2017
40 Columbia St, Islip
24 Jenkins St, Islip
2729 Union Blvd, Islip	1,670	08/26/2019
168 Islip Ave, Islip
2715 Union Blvd, Islip
155 Islip Ave, Islip	47,379
139 Nassau Ave, Islip
20 Jenkins St, Islip	1,218	06/26/2024	$486,000
179 Islip Ave, Islip
173 Islip Ave, Islip
390 Moffitt Blvd, Islip	7,884	12/02/2022	$895,000
26 Jenkins St, Islip
350 Moffitt Blvd, Islip	5,560
17 Oak CT, Islip	778	05/29/2020	$345,000
147 A Nassau Ave, Islip		05/07/2010	$226,600
78 Nassau Ave, Islip		09/14/2022	$560,000

Nearby ZIP Codes for 143 Nassau Avenue, Islip

Not sure if we cover all the data-points you need? View sample full report View sample full report