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143 Chestnut Street, Mount Sinai, NY 11766 Property Information

143 Chestnut Street, Mount Sinai, NY 11766 Property Information

  • General
  • Owner
  • Documents
  • Tax
  • Permits
  • Neighborhood
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143 Chestnut Street, Mount Sinai, NY 11766
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Address

Primary address 143 Chestnut Street, Mount Sinai
Zip code 11766
County Suffolk
Municipality Brookhaven
Parcel ID 1142814

Sales & Tax Overview for 143 Chestnut Street, Mount Sinai

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

Current property tax $10,151

Lot & Building Information for 143 Chestnut Street, Mount Sinai

Building sqft 2,239
Building class One Family Year-Round Residence (210)
Acreage 1
Year built 1986
Rooms 7
Bedrooms 3
Bathrooms 2
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Zoning, Use & Area Overview

Walk Score
1 /100. Car-Dependent
Transit Score
0 /100. Minimal Transit
Bike Score
27 /100. Somewhat Bikeable

Zoning district
School district Mount Sinai

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

Other Property Data for 143 Chestnut Street, Mount Sinai

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  • • Development maps such as planimetric, zoning, land use and urban landscape maps (building age and stories).
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About 143 Chestnut Street, Mount Sinai

What is the year built & the total sq. ft. for 143 Chestnut Street, Mount Sinai, NY 11766?

143 Chestnut Street, Mount Sinai, NY 11766 was built in 1986 and has a total of 2,239 square feet.

What is the assessed value of 143 Chestnut Street, Mount Sinai, NY 11766 and the property tax paid?

Assessed at $3,100, the tax amount paid for 143 Chestnut Street, Mount Sinai, NY 11766 is $12,747.

Ownership Information

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

Real Estate Reports:
How to Contact Property Owners: Cold Calling Scripts, Email Templates & Outreach Tips 
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.
Brooklyn Emerges as NYC’s Coworking Growth Engine, Manhattan Rents Cross $100 in the Plaza District 
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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.
Prices Rise in 32 of NYC’s Leading Neighborhoods as City and Manhattan Hit Record Highs
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
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Past Sales & Property History for 143 Chestnut Street, Mount Sinai

Create a free account to view the complete sales history for 143 Chestnut Street, Mount Sinai, including title documents, transfer conditions, mortgages and liens.

No recorded sales for this property.

More about Suffolk County Property Records

Title Documents for 143 Chestnut Street, Mount Sinai

Data not available for this property.

Property Taxes for 143 Chestnut Street, Mount Sinai

Access detailed property tax data for 143 Chestnut Street, Mount Sinai, NY 11766. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year 2025-2026
Base tax $12,748
Current property tax $10,151
Market value $584,906
Assessed value $3,100

More about Suffolk County Property Taxes

Assessment History for 143 Chestnut Street, Mount Sinai

Here's the assessment & property tax history for 143 Chestnut Street, Mount Sinai, 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 $584,906 $3,100 411.221 $12,748 +4.30%
2024-2025 $584,906 $3,100 394.249 $12,222 +3.18%
2023-2024 $574,074 $3,100 382.097 $11,845 +3.44%
2022-2023 $500,000 $3,100 369.378 $11,451 +2.22%
2021-2022 $418,919 $3,100 361.352 $11,202 +2.37%
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Permits for 143 Chestnut Street, Mount Sinai

The complete history of permits filed for 143 Chestnut Street, Mount Sinai, 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.

Brookhaven residential market stats

Median Sale Price
$575,000
4.5% YoY
Median Price/Sqft
$348
2.4% YoY
Suffolk County Median Sale Price
$677,000
5.9% YoY

Access a detailed real estate market overview of Brookhaven so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Brookhaven and compare it to other neighborhoods in Suffolk County.

Risk

Create a free account to unlock extended information for 143 Chestnut Street, Mount Sinai, 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 Chestnut Street, Mount Sinai 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)
Mount Sinai Middle School 5 Public 5-8 667 1.40
Clinton Avenue School NR Public K-2 441 1.62
John F Kennedy Middle School 4 Public 4, 6-8 822 1.72
North Shore Christian School NR Private PK, K-6 101 1.77
North Shore Christian School NR Private PK, K-6 101 1.77
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Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Mount Sinai Middle School 5 Public 5-8 667 1.40
John F Kennedy Middle School 4 Public 4, 6-8 822 1.72
Maryhaven Center Of Hope NR Private 47 2.82
North Country Road School 5 Public 6-8 534 2.96
Port Jefferson Middle School 7 Public 6-8 222 3.17
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Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Comsewogue High School 6 Public 9-12 1,153 1.27
Mount Sinai High School 9 Public 9-12 720 1.52
Miller Place High School 9 Public 9-12 820 1.66
Sunshine Alternative Education Center NR Private 10-12 10 2.60
Maryhaven Center Of Hope NR Private 47 2.82
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Data provided by GreatSchools.org © 2025. All rights reserved.

Neighbors for 143 Chestnut Street, Mount Sinai

Here are the neighbors for 143 Chestnut Street, Mount Sinai.

Address Square feet Purchase date Purchase price
147 Chestnut St, Mount Sinai 864 11/13/1998 $109,000
135 Chestnut St, Mount Sinai 2,512 02/22/2022
131 Chestnut St, Mount Sinai 4,718 12/24/2003
123 Chestnut St, Mount Sinai 2,257
149 Chestnut St, Mount Sinai 1,431
127 Chestnut St, Mount Sinai 2,546 11/17/2023 $733,000
121 Chestnut St, Mount Sinai 1,277 12/03/2021
155 Chestnut St, Mount Sinai 2,540 04/04/2012
161 Chestnut St, Mount Sinai 1,350
165 Chestnut St, Mount Sinai 1,808 10/02/2017 $315,000
139 Chestnut St, Mount Sinai 2,014 05/17/2022 $600,000
115 Chestnut St, Mount Sinai 1,301 12/02/2022 $520,000
137 Chestnut St, Mount Sinai 2,082 09/04/2024
125 Chestnut St, Mount Sinai 1,300 08/06/2025 $610,000
159 Chestnut St, Mount Sinai 1,772 01/31/2023
141 Chestnut St, Mount Sinai 1,229
145 Chestnut St, Mount Sinai 2,154 08/28/2025 $765,000
157 Chestnut St, Mount Sinai 02/05/2024 $162,500
539 Canal Rd, Mount Sinai 1,378 03/15/2016 $270,000
543 Canal Rd, Mount Sinai 1,474 06/15/2005 $367,000
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Nearby ZIP Codes for 143 Chestnut Street, Mount Sinai

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