| Primary address | 21 Prospect Avenue, Sea Cliff |
| Zip code | 11579 |
| County | Nassau |
| Town/City | Oyster Bay |
| Village (swiss code) | Sea Cliff |
| Parcel ID | 21-117-3 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 11/01/2019 |
| Sale price | $1,225,000 |
| Tax class | Register |
| Current property tax | $25,089 |
| Building sqft | 3,649 |
| Building class | One Family Year - Round Residence (210.01) |
| Land | Primary site |
| Topography | Level |
| Acreage | 0.324 |
| Buildings on lot | 1 |
| Year built | 1932 |
| Stories | 1.5 |
| Style | Old Style |
| Rooms | 8 |
| Bathrooms | 5 |
| Attic | None |
| Basement | Full |
| Exterior wall | Brick |
| Heating type | Central/AC |
| Heating system | Central w ac |
| Fireplace | 2 |
| Zoning district | Register (See more on map) |
| School district | Sea Cliff |
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 Prospect Avenue, Sea Cliff, NY 11579 was built in 1932 and has a total of 3,649 square feet.
What is the assessed value of 21 Prospect Avenue, Sea Cliff, NY 11579 and the property tax paid?Assessed at $1,471, the tax amount paid for 21 Prospect Avenue, Sea Cliff, NY 11579 is $31,303.
When was 21 Prospect Avenue, Sea Cliff, NY 11579 last sold and what was the last sale price?21 Prospect Avenue, Sea Cliff, NY 11579 was last sold in 11/01/2019 for $1,225,000.
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 Prospect Avenue, Sea Cliff, 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 Prospect Avenue, Sea Cliff, NY 11579. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2026 |
| Base tax | $31,303 |
| Current property tax | $25,090 |
| Tax class | Register |
| Market value | $1,471,000 |
| Assessed value | $1,471 |
Here's the assessment & property tax history for 21 Prospect Avenue, Sea Cliff, 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 | $1,471,000 | $1,471 | 2069.896 | $30,448 | +17.39% |
| 2024 | $1,168,000 | $1,168 | 2220.743 | $25,938 | -12.79% |
| 2023 | $1,281,000 | $1,281 | 2321.685 | $29,741 | +3.36% |
| 2022 | $1,168,000 | $1,168 | 2463.641 | $28,775 | -16.63% |
| 2021 | $1,275,000 | $1,275 | 2707.164 | $34,516 | +70.34% |
The complete history of permits filed for 21 Prospect Avenue, Sea Cliff, 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 Prospect Avenue, Sea Cliff, 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 Prospect Avenue, Sea Cliff 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) |
|---|---|---|---|---|---|
| Sea Cliff Elementary School | 8 | Public | K-5 | 343 | 0.47 |
| Tiegerman Elementary School | NR | Private | 1-5 | 136 | 0.65 |
| Landing School | 4 | Public | PK, 3-5 | 349 | 0.78 |
| Landing School | 4 | Public | PK, 3-5 | 349 | 0.78 |
| North Shore Senior High School | 9 | Public | K-5, 9-12 | 764 | 1.19 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| North Shore Middle School | 9 | Public | K-8 | 646 | 1.28 |
| All Saints Regional Catholic School | NR | Private | PK-8 | 166 | 1.40 |
| Robert M Finley Middle School | 5 | Public | 6-8 | 710 | 1.59 |
| North Shore Day School | NR | Private | 0 | 1.78 | |
| St. Peter of Alcantara School | NR | Private | PK-8 | 162 | 2.34 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| North Shore Senior High School | 9 | Public | K-5, 9-12 | 764 | 1.19 |
| North Shore Day School | NR | Private | 0 | 1.78 | |
| Glen Cove High School | 5 | Public | 9-12 | 1,050 | 2.16 |
| Paul D Schreiber Senior High School | 9 | Public | 9-12 | 1,613 | 2.34 |
| Friends Academy | NR | Private | PK-12 | 765 | 2.75 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Prospect Avenue, Sea Cliff.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 51 Carpenter Ave, Sea Cliff | 2,668 | 04/07/2020 | $1,350,000 |
| 61 Carpenter Ave, Sea Cliff | 1,494 | ||
| 7 Prospect Ave, Sea Cliff | 452 | ||
| 191 Glen Cove Ave, Sea Cliff | 1,028 | 01/18/2024 | |
| 187 Glen Cove Ave, Sea Cliff | 3,690 | ||
| 63 Carpenter Ave, Sea Cliff | 2,227 | ||
| 9 Prospect Ave, Sea Cliff | 1,559 | ||
| 193 Glen Cove Ave, Sea Cliff | 1,913 | 05/23/2023 | $700,000 |
| 11 Prospect Ave, Sea Cliff | 2,220 | 05/18/1995 | $350,000 |
| 59 Carpenter Ave, Sea Cliff | 1,137 | 09/28/2021 | |
| 30 Sea Cliff Ave, Sea Cliff | 3,325 | 08/07/2014 | $670,000 |
| 5 Prospect Ave, Sea Cliff | 2,100 | 10/03/2014 | $755,000 |
| 3 Prospect Ave, Sea Cliff | 1,008 | 10/10/2000 | $122,500 |
| 54 Sea Cliff Ave, Sea Cliff | 2,906 | 06/21/2024 | |
| 23 Prospect Ave, Sea Cliff | 1,818 | 07/11/2019 | $795,000 |
| 10 Sea Cliff Ave, Sea Cliff | 1,320 | 01/12/2000 | $25,000 |
| 6 Sea Cliff Ave, Sea Cliff | 3,525 | 08/02/2017 | $1,300,000 |
| 17 Prospect Ave, Sea Cliff | 2,530 | 05/14/2015 | $1,274,000 |
| 3 Carpenter Ave, Sea Cliff | 1,421 | 08/04/1997 | $275,000 |
| 62 Sea Cliff Ave, Sea Cliff | 3,560 |