Suffolk County  »  11766  »  Mill St  »  21 Mill St

21 Mill Street, Mount Sinai, NY 11766 - Property report

Also known as: 21 Mill St

Property image for 21 Mill Street, Mount Sinai, NY 11766
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Property type

One Family Year-Round Residence with Accessory Apartment (215)

Year built

1986

Acreage

0.34

Sale price

$500,999

General information

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Address
Primary address
21 Mill Street
ZIP code
11766
County
Suffolk
Village (SWIS code)
472289
Parcel ID
1126060

Owner

Find out who owns 21 Mill Street, Mount Sinai, NY 11766. Uncover corporate and individual owners with a free account.

Sales
Sale date
12/11/2020
Sale price
$500,999
Arm's length
Tax
Tax year
2025-2026
Current property tax
$13,694
Building
Property type
One Family Year-Round Residence with Accessory Apartment (215)
Building sq. ft.
2,232
Year built
1986
Lot
Acreage
0.34

Area overview

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

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

Ownership

Ownership information for 21 Mill Street, Mount Sinai, NY

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

Sales history for 21 Mill Street, Mount Sinai, NY 11766

Sale date Sale price Buyer name Seller name
12/11/2020 $500,999 XXXXXXX XXXX; XXXXXXXX XXXX XXXXXXX XXXXXXXXX X
06/28/2016 $303,000 XXXXXXX XXXXXXXXX X XXXXXX XXXXXXXXX; XXXXX XXXXXXXXX

*Most recent sales on record for this property.

More about Suffolk County property records.

Title documents

Date Type Amount Party 1 Party 2
05/29/2024 - R
02/29/2024 - D		 Deed XXXX XXXXXXX XXXX XXXXXXX
01/26/2021 - R
12/11/2020 - D		 Deed
(Bargain and sale)		 XXXXXXX XXXXXXXXX X XXXXXXX XXXX
08/03/2016 - R
06/28/2016 - D		 Deed
(Bargain and sale)		 XXXXXX XXXXXXXXX XXXXXXX XXXXXXXXX X

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 21 Mill Street, 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
$13,694
Recent tax assessments
Market value
$628,302
Assessed value
$3,330

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 $628,302 $3,330 411.221 $13,694 +4.30%
2024-2025 $628,302 $3,330 394.249 $13,128 +3.18%
2023-2024 $616,667 $3,330 382.097 $12,724 +3.44%
2022-2023 $537,097 $3,330 369.378 $12,300 +2.22%
2021-2022 $450,000 $3,330 361.352 $12,033 +6.53%
2020-2021 $415,584 $3,200 352.982 $11,295 -5.11%
2019-2020 $400,581 $3,445 345.531 $11,904 +0.12%
2018-2019 $400,581 $3,445 345.113 $11,889 +1.84%
2017-2018 $382,778 $3,445 338.893 $11,675 +0.54%
2016-2017 $378,571 $3,445 337.064 $11,612 +1.70%
Permits

Permit information for 21 Mill Street, 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
View daily traffic map

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Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
Clinton Avenue School NR Public K-2 441 1.58
North Shore Christian School NR Private PK, K-6 101 1.99
North Shore Christian School NR Private PK, K-6 101 1.99
West Middle Island School 4 Public K-4 642 2.02
John F Kennedy Middle School 4 Public 4, 6-8 822 2.04
Terryville Road School 2 Public 3-5 454 2.05
Mount Sinai Middle School 5 Public 5-8 667 2.15
Coram Elementary School 3 Public PK, K-4 914 2.35
Coram Elementary School 3 Public PK, K-4 914 2.35
Stagecoach School 4 Public K-5 353 2.44
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
John F Kennedy Middle School 4 Public 4, 6-8 822 2.04
Mount Sinai Middle School 5 Public 5-8 667 2.15
Selden Middle School 4 Public 6-8 1,058 3.44
Maryhaven Center Of Hope NR Private 47 3.49
North Country Road School 5 Public 6-8 534 3.54
Port Jefferson Middle School 7 Public 6-8 222 3.77
Rocky Point Middle School 4 Public 6-8 638 4.23
Our Lady of Wisdom Regional School NR Private PK-8 74 4.24
Jericho Elementary School 3 Public 1-5, 7 413 4.35
Dawnwood Middle School 5 Public 6-8 1,074 4.78
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Comsewogue High School 6 Public 9-12 1,153 1.30
Miller Place High School 9 Public 9-12 820 1.96
Mount Sinai High School 9 Public 9-12 720 2.27
Sunshine Alternative Education Center NR Private 10-12 10 2.47
Ward Melville Senior High School 10 Public 9-12 1,507 3.40
Maryhaven Center Of Hope NR Private 47 3.49
Newfield High School 8 Public 9-12 1,559 3.64
Earl L Vandermeulen High School 9 Public 9-12 323 3.77
Rocky Point High School 7 Public 9-12 923 4.18
Sachem High School East 7 Public 9-12 2,082 4.50

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

Neighbors for 21 Mill Street, Mount Sinai, NY

5 Mill St, Port Jefferson Station 25 Mill St, Port Jefferson Station 10 Mill St, Port Jefferson Station 19 Mill St, Port Jefferson Station 17 Mill St, Port Jefferson Station 9 Mill St, Port Jefferson Station 12 Mill St, Port Jefferson Station 5 Anchor Ln, Mount Sinai 23 Mill St, Port Jefferson Station 26 Mill St, Port Jefferson Station 24 Mill St, Port Jefferson Station 8 Mill St, Port Jefferson Station 16 Mill St, Port Jefferson Station 15 Mill St, Port Jefferson Station 7 Mill St, Port Jefferson Station 14 Mill St, Port Jefferson Station 13 Mill St, Port Jefferson Station 22 Mill St, Port Jefferson Station 11 Mill St, Mount Sinai 3 Mill St, Mount Sinai

Nearby ZIP codes for 21 Mill Street, 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 21 Mill Street, Mount Sinai, NY 11766?

The development at 21 Mill Street, Mount Sinai, NY 11766 was built in 1986.

What is the total square footage of 21 Mill Street, Mount Sinai, NY 11766?

21 Mill Street, Mount Sinai, NY 11766 has a total of 2,232 square feet.

When was 21 Mill Street, Mount Sinai, NY 11766 last sold and what was the sale price?

21 Mill Street, Mount Sinai, NY 11766 was last sold on 12/11/2020 for $500,999.

What is the assessed value of 21 Mill Street, Mount Sinai, NY 11766?

21 Mill Street, Mount Sinai, NY 11766 is currently assessed at $3,330.

What are the property taxes for 21 Mill Street, Mount Sinai, NY 11766?

The property taxes for 21 Mill Street, Mount Sinai, NY 11766 total $13,693.

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