| Primary address | 9 Chelsea Drive, Mount Sinai |
| Zip code | 11766 |
| County | Suffolk |
| Municipality | Brookhaven |
| Parcel ID | 1126377 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 04/19/2001 |
| Sale price | $219,900 |
| Arm's length | Register |
| Current property tax | $10,782 |
| Building sqft | 1,344 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.58 |
| Year built | 1975 |
| Rooms | 5 |
| Bedrooms | 3 |
| Bathrooms | 1 |
| School district | Mount Sinai |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
9 Chelsea Drive, Mount Sinai, NY 11766 was built in 1975 and has a total of 1,344 square feet.
What is the assessed value of 9 Chelsea Drive, Mount Sinai, NY 11766 and the property tax paid?Assessed at $2,840, the tax amount paid for 9 Chelsea Drive, Mount Sinai, NY 11766 is $11,678.
When was 9 Chelsea Drive, Mount Sinai, NY 11766 last sold and what was the last sale price?9 Chelsea Drive, Mount Sinai, NY 11766 was last sold in 04/19/2001 for $219,900.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 9 Chelsea Drive, Mount Sinai, including title documents, transfer conditions, mortgages and liens.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 9 Chelsea Drive, 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 | $11,679 |
| Current property tax | $10,782 |
| Market value | $535,849 |
| Assessed value | $2,840 |
Here's the assessment & property tax history for 9 Chelsea Drive, 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 |
|---|---|---|---|---|---|
| 2024-2025 | $535,849 | $2,840 | 394.249 | $11,197 | +3.18% |
| 2023-2024 | $525,926 | $2,840 | 382.097 | $10,852 | +3.44% |
| 2022-2023 | $458,064 | $2,840 | 369.378 | $10,490 | +2.22% |
| 2021-2022 | $383,784 | $2,840 | 361.352 | $10,262 | +2.37% |
| 2020-2021 | $368,831 | $2,840 | 352.982 | $10,025 | +2.16% |
The complete history of permits filed for 9 Chelsea Drive, 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.
Create a free account to unlock extended information for 9 Chelsea Drive, 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) |
Access the detailed traffic volume map for 9 Chelsea Drive, 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 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| West Middle Island School | 4 | Public | K-4 | 642 | 1.87 |
| Mount Sinai Middle School | 5 | Public | 5-8 | 667 | 2.04 |
| Clinton Avenue School | NR | Public | K-2 | 441 | 2.25 |
| John F Kennedy Middle School | 4 | Public | 4, 6-8 | 822 | 2.56 |
| North Shore Christian School | NR | Private | PK, K-6 | 101 | 2.57 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Mount Sinai Middle School | 5 | Public | 5-8 | 667 | 2.04 |
| John F Kennedy Middle School | 4 | Public | 4, 6-8 | 822 | 2.56 |
| North Country Road School | 5 | Public | 6-8 | 534 | 3.05 |
| Rocky Point Middle School | 4 | Public | 6-8 | 638 | 3.53 |
| Maryhaven Center Of Hope | NR | Private | 47 | 3.69 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Miller Place High School | 9 | Public | 9-12 | 820 | 1.33 |
| Comsewogue High School | 6 | Public | 9-12 | 1,153 | 1.93 |
| Mount Sinai High School | 9 | Public | 9-12 | 720 | 2.23 |
| Sunshine Alternative Education Center | NR | Private | 10-12 | 10 | 3.16 |
| Rocky Point High School | 7 | Public | 9-12 | 923 | 3.48 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 9 Chelsea Drive, Mount Sinai.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 43 Chelsea Dr, Mount Sinai | 3,112 | ||
| 19 Plymouth Ave, Mount Sinai | 2,628 | 07/09/2016 | $1 |
| 28 Plymouth Ave, Mount Sinai | 3,626 | 10/31/2023 | |
| 25 Plymouth Ave, Mount Sinai | 1,842 | ||
| 27 Chelsea Dr, Mount Sinai | 1,549 | 10/02/1998 | $154,500 |
| 4 Kingston Rd, Mount Sinai | 2,646 | 10/09/2020 | $545,000 |
| 2 Chelsea Dr, Mount Sinai | 1,763 | ||
| 11 Chelsea Dr, Mount Sinai | 2,033 | 11/16/2009 | $370,000 |
| 31 Chelsea Dr, Mount Sinai | 2,480 | 08/24/2000 | $180,000 |
| 39 Chelsea Dr, Mount Sinai | 1,046 | 07/19/2022 | $484,000 |
| 5 Chelsea Dr, Mount Sinai | 1,272 | 04/14/2000 | $198,500 |
| 21 Plymouth Ave, Mount Sinai | 1,246 | 12/17/2024 | |
| 2 Kingston Rd, Mount Sinai | 1,526 | 03/27/2007 | $360,000 |
| 4 Chelsea Dr, Mount Sinai | 1,882 | 07/21/2025 | $550,000 |
| 15 Chelsea Dr, Mount Sinai | 1,846 | ||
| 19 Chelsea Dr, Mount Sinai | 1,556 | 11/27/2018 | |
| 23 Chelsea Dr, Mount Sinai | 1,595 | 07/22/2024 | |
| 35 Chelsea Dr, Mount Sinai | 1,638 | 10/01/2021 | $551,101 |
| 6 Chelsea Dr, Mount Sinai | 1,693 | 10/29/2004 | $395,000 |