Suffolk County  »  11766  »  Old Post Rd  »  4 Old Post Rd

4 Old Post Road, Mount Sinai, NY 11766 - Property report

Also known as: 4 Old Post Rd

Property image for 4 Old Post Road, Mount Sinai, NY 11766
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Property type

One Family Year-Round Residence (210)

Year built

1820

Acreage

0.92

Sale price

$507,500

General information

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Address
Primary address
4 Old Post Road
ZIP code
11766
County
Suffolk
Village (SWIS code)
472289
Parcel ID
8710926

Owner

Find out who owns 4 Old Post Road, Mount Sinai, NY 11766. Uncover corporate and individual owners with a free account.

Sales
Sale date
06/05/2018
Sale price
$507,500
Arm's length
Tax
Tax year
2025-2026
Current property tax
$16,737
Building
Property type
One Family Year-Round Residence (210)
Building sq. ft.
3,731
Year built
1820
Lot
Acreage
0.92

Area overview

Walk score
10 /100.  Car-Dependent
Transit score
0 /100.  Minimal Transit
Bike score
4 /100.  Somewhat Bikeable
School district
472207

View more such as transportation, nearby schools and risk designations.

Ownership

Ownership information for 4 Old Post Road, Mount Sinai, NY

Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 4 Old Post Road, Mount Sinai, NY 11766

Sale date Sale price Buyer name Seller name
06/05/2018 $507,500 XXXXXXX XXXXXX; XXXX XXXXXX; XXXXXX XXXX XXXXXXXXXX XXXXX; XXXXX XXXXXXXXXX; XXXXXXXX XXXXXXXXXX X
12/26/2002 $605,000 XXXXXXXXXX XXXXX XXXX XXXXX X/XXXXXX XXX
05/02/1996 $175,000 XXXX XXXXX X XXX XXXXX XX XXXX XXXXXX XX XXXXXXXXXX XXX

*Most recent sales on record for this property.

More about Suffolk County property records.

Title documents

Date Type Amount Party 1 Party 2
07/17/2018 - R
06/05/2018 - D		 Deed XXXXXXXXXX XXXXX XXXXXXX XXXXXX
05/11/2012 - R
03/16/2012 - D		 Deed
01/09/2003 - R
12/26/2002 - D		 Deed XXXX XXXXX X/XXXXXX XXX XXXXXXXXXX XXXXX
05/10/1996 - R
05/02/1996 - D		 Deed XXX XXXXX XX XXXX XXXXXX XX XXXXXXXXXX XXX XXXX XXXXX X

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 4 Old Post Road, Mount Sinai, NY

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax
Tax year
2025-2026
Property tax
$16,737
Recent tax assessments
Market value
$767,925
Assessed value
$4,070

More about Suffolk County property taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year Market value Assessed value Tax rate Property tax Y-o-Y change
2025-2026 $767,925 $4,070 411.221 $16,737 +4.30%
2024-2025 $767,925 $4,070 394.249 $16,046 +3.18%
2023-2024 $753,704 $4,070 382.097 $15,551 +3.44%
2022-2023 $656,452 $4,070 369.378 $15,034 +2.22%
2021-2022 $550,000 $4,070 361.352 $14,707 +2.37%
2020-2021 $528,571 $4,070 352.982 $14,366 +2.16%
2019-2020 $473,256 $4,070 345.531 $14,063 +0.12%
2018-2019 $473,256 $4,070 345.113 $14,046 +1.84%
2017-2018 $452,222 $4,070 338.893 $13,793 +0.54%
2016-2017 $447,253 $4,070 337.064 $13,719 +1.70%
Permits

Permit information for 4 Old Post Road, Mount Sinai, NY

No recently recorded permits for this property.

Neighborhood

Brookhaven residential market stats

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.

Median sale price

$575,000

4.5% Y-o-Y

Median price/sq. ft.

$348

2.4% Y-o-Y

Suffolk county median sale price

$677,000

5.9% Y-o-Y

Risk

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FEMA flood zones

FEMA flood zones
X

Transportation

Daily traffic map
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Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
Mount Sinai Middle School 5 Public 5-8 667 0.80
Port Jefferson Elementary School 5 Public PK, K-5 364 1.26
Port Jefferson Elementary School 5 Public PK, K-5 364 1.26
Maryhaven Center Of Hope NR Private 47 1.45
Mount Sinai Elementary School 7 Public K-4 659 1.64
Our Lady of Wisdom Regional School NR Private PK-8 74 2.01
Our Lady of Wisdom Regional School NR Private PK-8 74 2.01
Sound Beach School 4 Public 3-5 473 2.08
John F Kennedy Middle School 4 Public 4, 6-8 822 2.39
Andrew Muller Primary School NR Public K-2 468 2.45
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Mount Sinai Middle School 5 Public 5-8 667 0.80
Maryhaven Center Of Hope NR Private 47 1.45
Our Lady of Wisdom Regional School NR Private PK-8 74 2.01
North Country Road School 5 Public 6-8 534 2.07
Port Jefferson Middle School 7 Public 6-8 222 2.10
John F Kennedy Middle School 4 Public 4, 6-8 822 2.39
The Laurel Hill School NR Private PK-8 321 3.54
Paul J Gelinas Junior High School 8 Public 7-9 647 4.79
Rocky Point Middle School 4 Public 6-8 638 4.81
Selden Middle School 4 Public 6-8 1,058 5.17
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Mount Sinai High School 9 Public 9-12 720 0.64
Maryhaven Center Of Hope NR Private 47 1.45
Earl L Vandermeulen High School 9 Public 9-12 323 2.10
Miller Place High School 9 Public 9-12 820 2.44
Comsewogue High School 6 Public 9-12 1,153 2.76
Ward Melville Senior High School 10 Public 9-12 1,507 3.19
Sunshine Alternative Education Center NR Private 10-12 10 3.84
Rocky Point High School 7 Public 9-12 923 4.71
Newfield High School 8 Public 9-12 1,559 5.47
The Stony Brook School NR Private 7-12 412 5.49

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 4 Old Post Road, Mount Sinai, NY

140 MT Sinai Ave, Mount Sinai 60 N Country Rd, Mount Sinai 555 Canal Rd, Mount Sinai 123 MT Sinai Ave, Mount Sinai 48 Birch Hill Rd, Mount Sinai 49 N Country Rd, Mount Sinai 111 N Country Rd, Mount Sinai 47 N Country Rd, Mount Sinai 9 High Hill Rd, Mount Sinai 31 Ashland St, Mount Sinai 6 Old Post Rd, Mount Sinai 8 Old Post Rd, Mount Sinai 188 MT Sinai Ave, Mount Sinai 179 MT Sinai Ave, Mount Sinai 119 MT Sinai Ave N, Mount Sinai 42 Birch Hill Rd, Mount Sinai 88 Old Post Rd, Mount Sinai 559 Canal Rd, Mount Sinai 529 MT Sinai CRM Rd, Mount Sinai 6 Ashland St, Mount Sinai

Nearby ZIP codes for 4 Old Post Road, Mount Sinai, NY

11720, Suffolk County, NY 11727, Suffolk County, NY 11733, Suffolk County, NY 11738, Suffolk County, NY 11742, Suffolk County, NY 11755, Suffolk County, NY 11763, Suffolk County, NY 11764, Suffolk County, NY 11776, Suffolk County, NY 11777, Suffolk County, NY 11778, Suffolk County, NY 11784, Suffolk County, NY 11786, Suffolk County, NY 11789, Suffolk County, NY 11790, Suffolk County, NY 11953, Suffolk County, NY 11961, Suffolk County, NY 11980, Suffolk County, NY

Frequently asked questions

What is the year built for 4 Old Post Road, Mount Sinai, NY 11766?

The development at 4 Old Post Road, Mount Sinai, NY 11766 was built in 1820.

What is the total square footage of 4 Old Post Road, Mount Sinai, NY 11766?

4 Old Post Road, Mount Sinai, NY 11766 has a total of 3,731 square feet.

When was 4 Old Post Road, Mount Sinai, NY 11766 last sold and what was the sale price?

4 Old Post Road, Mount Sinai, NY 11766 was last sold on 06/05/2018 for $507,500.

What is the assessed value of 4 Old Post Road, Mount Sinai, NY 11766?

4 Old Post Road, Mount Sinai, NY 11766 is currently assessed at $4,070.

What are the property taxes for 4 Old Post Road, Mount Sinai, NY 11766?

The property taxes for 4 Old Post Road, Mount Sinai, NY 11766 total $16,736.

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