| Primary address | 21 Somerset Avenue, Mastic |
| Zip code | 11950 |
| County | Suffolk |
| Municipality | Brookhaven |
| Parcel ID | 4010970 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 01/17/2003 |
| Sale price | $189,900 |
| Arm's length | Register |
| Current property tax | $5,972 |
| Building sqft | 1,656 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.25 |
| Year built | 1977 |
| Rooms | 7 |
| Bedrooms | 3 |
| Bathrooms | 2 |
| Zoning district | Register |
| School district | William Floyd |
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:
21 Somerset Avenue, Mastic, NY 11950 was built in 1977 and has a total of 1,656 square feet.
What is the assessed value of 21 Somerset Avenue, Mastic, NY 11950 and the property tax paid?Assessed at $1,805, the tax amount paid for 21 Somerset Avenue, Mastic, NY 11950 is $6,676.
When was 21 Somerset Avenue, Mastic, NY 11950 last sold?21 Somerset Avenue, Mastic, NY 11950 was last sold in 07/19/2016.
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 21 Somerset Avenue, Mastic, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
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 21 Somerset Avenue, Mastic, NY 11950. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Base tax | $6,677 |
| Current property tax | $5,972 |
| Market value | $340,566 |
| Assessed value | $1,805 |
Here's the assessment & property tax history for 21 Somerset Avenue, Mastic, 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 | $340,566 | $1,805 | 363.67 | $6,564 | +2.08% |
| 2023-2024 | $334,260 | $1,805 | 356.252 | $6,430 | -12.23% |
| 2022-2023 | $291,129 | $1,805 | 405.87 | $7,326 | -3.28% |
| 2021-2022 | $243,919 | $1,805 | 419.634 | $7,574 | +0.99% |
| 2020-2021 | $234,416 | $1,805 | 415.528 | $7,500 | +2.62% |
The complete history of permits filed for 21 Somerset Avenue, Mastic, 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 21 Somerset Avenue, Mastic, 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 21 Somerset Avenue, Mastic 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) |
|---|---|---|---|---|---|
| William Floyd Elementary School | 4 | Public | K-5 | 742 | 0.53 |
| William Floyd Learning Center | NR | Public | K-5 | 68 | 0.53 |
| John S Hobart Elementary School | 3 | Public | K-5 | 798 | 0.65 |
| Nathaniel Woodhull Elementary School | 6 | Public | K-5 | 703 | 0.89 |
| Tangier Smith Elementary School | 5 | Public | K-5 | 755 | 1.33 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| William Paca Middle School | 4 | Public | 6-8 | 1,009 | 1.19 |
| William Floyd Middle School | 3 | Public | 6-8 | 1,053 | 2.31 |
| Center Moriches Middle School | 3 | Public | 6-8 | 325 | 2.76 |
| Eastport South Manor Junior Senior High School | 5 | Public | 7-12 | 1,530 | 3.12 |
| Our Lady Queen Of Apostles Reg Catholic School | NR | Private | PK-8 | 153 | 3.65 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| William Floyd High School | 5 | Public | 9-12 | 3,013 | 1.01 |
| Center Moriches High School | 8 | Public | 9-12 | 556 | 2.76 |
| Eastport South Manor Junior Senior High School | 5 | Public | 7-12 | 1,530 | 3.12 |
| Bellport Senior High School | 5 | Public | 9-12 | 1,392 | 3.73 |
| Leonard E Burket Christian School | NR | Private | PK-12 | 77 | 4.00 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Somerset Avenue, Mastic.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 116 Monroe St, Mastic | 1,956 | 10/31/2023 | $595,000 |
| 29 Somerset Ave, Mastic | 1,408 | ||
| 17 Somerset Ave, Mastic | 1,236 | 08/06/2025 | |
| 123 Van Buren St, Mastic | 900 | 10/18/2001 | $123,000 |
| 115 Van Buren St, Mastic | 1,134 | 06/02/2022 | $456,000 |
| 126 Van Buren St, Mastic Beach | 2,137 | 02/23/2004 | $299,000 |
| 7 Somerset Ave, Mastic | 836 | 05/21/2004 | $125,000 |
| 25 Somerset Ave, Mastic | 2,096 | 09/24/2019 | $287,000 |
| 110 Van Buren St, Mastic | 828 | 08/16/2000 | $69,000 |
| 35 Somerset Ave, Mastic | 2,184 | ||
| 27 Somerset Ave, Mastic | 1,050 | 05/05/2022 | $316,000 |
| 127 Van Buren St, Mastic | 4,223 | 03/22/2005 | $475,000 |
| 121 Van Buren St, Mastic | 1,236 | 04/05/2002 | $167,900 |
| 118 Van Buren St, Mastic | 02/10/2004 | ||
| 23 Somerset Ave, Mastic | 1,216 | 11/25/2020 | $225,000 |
| 31 Somerset Ave, Mastic | 1,140 | 12/27/1996 | $87,500 |
| 126 Monroe St, Mastic | 2,452 | 04/08/2011 | $259,000 |
| 120 Monroe St, Mastic | 1,308 | 03/30/2020 | $275,000 |
| 112 Monroe St, Mastic | |||
| 122 Van Buren St, Mastic | 1,035 | 11/20/2015 |