| Primary address | 21 Island Street, Plainview |
| Zip code | 11803 |
| County | Nassau |
| Town/City | Oyster Bay |
| Village (swiss code) | None (unincorporated town) |
| Parcel ID | 12-51-20 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Building sqft | 1,556 |
| Building class | Two Family Year - Round Residence (220.01) |
| Land | Primary site |
| Topography | Level |
| Acreage | 0.184 |
| Buildings on lot | 1 |
| Year built | 1959 |
| Stories | 1 |
| Style | Cape |
| Rooms | 8 |
| Bathrooms | 4 |
| Attic | Full |
| Basement | Full |
| Exterior wall | Asbestos |
| Heating type | Central |
| Heating system | Hot water |
| Zoning district | Register (See more on map) |
| School district | Plainview |
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 Island Street, Plainview, NY 11803 was built in 1959 and has a total of 1,556 square feet.
What is the assessed value of 21 Island Street, Plainview, NY 11803 and the property tax paid?Assessed at $529, the tax amount paid for 21 Island Street, Plainview, NY 11803 is $16,165.
When was 21 Island Street, Plainview, NY 11803 last sold and what was the last sale price?21 Island Street, Plainview, NY 11803 was last sold in 12/18/2024 for $800,000.
How many residential units does this building have?This building has 2 residential unit(s).
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 Island Street, Plainview, 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 Island Street, Plainview, NY 11803. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2026 |
| Property tax | $16,166 |
| Tax class | Register |
| Market value | $529,000 |
| Assessed value | $529 |
Here's the assessment & property tax history for 21 Island Street, Plainview, 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 | $519,000 | $519 | 2970.267 | $15,416 | -9.34% |
| 2024 | $535,000 | $535 | 3178.305 | $17,004 | -4.91% |
| 2023 | $535,000 | $535 | 3342.412 | $17,882 | -9.82% |
| 2022 | $535,000 | $535 | 3706.543 | $19,830 | -12.22% |
| 2021 | $537,000 | $537 | 4206.654 | $22,590 | +112.37% |
The complete history of permits filed for 21 Island Street, Plainview, 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 Island Street, Plainview, 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 Island Street, Plainview 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) |
|---|---|---|---|---|---|
| Our Lady Of Mercy School | NR | Private | PK-8 | 195 | 0.32 |
| Our Lady Of Mercy School | NR | Private | PK-8 | 195 | 0.32 |
| Pasadena Elementary School | 9 | Public | K-4 | 439 | 0.47 |
| East Street School | 5 | Public | K-5 | 398 | 0.79 |
| Kramer Lane Elementary School | 8 | Public | K-5 | 387 | 0.88 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Our Lady Of Mercy School | NR | Private | PK-8 | 195 | 0.32 |
| St Ignatius Loyola School | NR | Private | PK, K-8 | 226 | 1.13 |
| Plainview Old Bethpage Middle School | 8 | Public | 5-8 | 889 | 1.29 |
| Good Shepherd Lutheran School | NR | Private | 0 | 1.31 | |
| Trinity Lutheran School | NR | Private | PK-8 | 196 | 1.34 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Good Shepherd Lutheran School | NR | Private | 0 | 1.31 | |
| Long Island Christian Academy | NR | Private | K-10 | 0 | 1.44 |
| Bethpage Senior High School | 9 | Public | 9-12 | 932 | 1.47 |
| Hicksville High School | 6 | Public | 9-12 | 1,852 | 1.73 |
| Miss Sue's Nursery School and Kindergarten | NR | Private | 0 | 1.94 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Island Street, Plainview.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 510-526 Old Country Rd, Garden City | 12/18/1998 | $2,200,000 | |
| 510-524 Old Country Rd, Plainview | 16,637 | ||
| 500 Old Country Rd, Plainview | 3,730 | 03/15/2004 | |
| 48 Island St, Plainview | 1,365 | ||
| 47 Vernon St, Plainview | 1,274 | 03/08/2004 | |
| 565 S Oyster Bay Rd, Plainview | 3,528 | 12/18/2002 | |
| 39 Vernon St, Plainview | 1,536 | 03/07/2024 | $750,000 |
| 35 Vernon St, Plainview | 864 | 12/03/2025 | $610,000 |
| 46 Island St, Plainview | 1,274 | 12/11/1995 | $155,000 |
| 37 Vernon St, Plainview | 1,512 | 10/19/2005 | $468,000 |
| 33 Vernon St, Plainview | 1,800 | 08/29/2012 | $446,000 |
| 15 Island St, Plainview | 864 | 12/20/2024 | $560,000 |
| 17 Island St, Plainview | 1,296 | 07/09/2021 | $490,000 |
| 19 Island St, Plainview | 2,712 | 05/27/2022 | $1,300,000 |
| 4 Universal Blvd, Plainview | 2,100 | 11/29/2004 | |
| 39 Island St, Plainview | 1,672 | 04/29/2003 | |
| 35 Island St, Plainview | 1,728 | ||
| 37 Island St, Plainview | 1,392 | 04/05/2022 | $750,000 |
| 49 Vernon St, Plainview | 2,229 | 12/13/2021 | $220,000 |
| 33 Island St, Plainview | 2,760 | 12/18/2020 | $542,000 |