| Primary address | 21 Knickerbocker Avenue, Holbrook |
| Zip code | 11741 |
| County | Suffolk |
| Municipality | Brookhaven |
| Parcel ID | 8000690 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 04/15/2016 |
| Sale price | $285,000 |
| Arm's length | Register |
| Property tax | $9,006 |
| Building sqft | 1,204 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.25 |
| Year built | 1960 |
| Rooms | 5 |
| Bedrooms | 3 |
| Bathrooms | 1 |
| School district | Sachem |
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 Knickerbocker Avenue, Holbrook, NY 11741 was built in 1960 and has a total of 1,204 square feet.
What is the assessed value of 21 Knickerbocker Avenue, Holbrook, NY 11741 and the property tax paid?Assessed at $2,550, the tax amount paid for 21 Knickerbocker Avenue, Holbrook, NY 11741 is $9,006.
When was 21 Knickerbocker Avenue, Holbrook, NY 11741 last sold and what was the last sale price?21 Knickerbocker Avenue, Holbrook, NY 11741 was last sold in 04/15/2016 for $285,000.
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 Knickerbocker Avenue, Holbrook, 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 21 Knickerbocker Avenue, Holbrook, NY 11741. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $9,006 |
| Market value | $481,132 |
| Assessed value | $2,550 |
Here's the assessment & property tax history for 21 Knickerbocker Avenue, Holbrook, 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 |
|---|---|---|---|---|---|
| 2025-2026 | $481,132 | $2,550 | 353.178 | $9,006 | +4.38% |
| 2024-2025 | $481,132 | $2,550 | 338.342 | $8,628 | -17.92% |
| 2023-2024 | $472,222 | $2,550 | 412.188 | $10,511 | +27.16% |
| 2022-2023 | $411,290 | $2,550 | 324.157 | $8,266 | +3.72% |
| 2021-2022 | $344,595 | $2,550 | 312.54 | $7,970 | +2.63% |
The complete history of permits filed for 21 Knickerbocker Avenue, Holbrook, 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.
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 County.
Create a free account to unlock extended information for 21 Knickerbocker Avenue, Holbrook, 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 Knickerbocker Avenue, Holbrook 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 (miles) |
|---|---|---|---|---|---|
| Hiawatha School | 4 | Public | K-5 | 603 | 0.63 |
| Nokomis School | 3 | Public | K-5 | 527 | 0.99 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.38 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.38 |
| Grundy Avenue School | 5 | Public | K-5 | 470 | 1.87 |
| Name | Rating | Type | Grade range | No of students | Distance (miles) |
|---|---|---|---|---|---|
| Seneca Middle School | 6 | Public | 6-8 | 973 | 1.16 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.38 |
| Samoset Middle School | 6 | Public | 6-8 | 892 | 1.61 |
| Sagamore Middle School | 6 | Public | 6-8 | 933 | 2.11 |
| Long Island Baptist Academy | NR | Private | 2-12 | 8 | 2.27 |
| Name | Rating | Type | Grade range | No of students | Distance (miles) |
|---|---|---|---|---|---|
| Sachem High School North | 8 | Public | 9-12 | 1,923 | 1.96 |
| Long Island Baptist Academy | NR | Private | 2-12 | 8 | 2.27 |
| Cleary School For The Deaf | NR | Private | PK-12 | 79 | 2.87 |
| Lake Grove School | NR | Private | 8-12 | 50 | 3.11 |
| Connetquot High School | 8 | Public | 9-12 | 1,757 | 3.15 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Knickerbocker Avenue, Holbrook.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 14 Knickerbocker Ave, Holbrook | 1,996 | 09/18/2000 | $120,000 |
| 41 Holbrook Rd, Holbrook | 2,187 | 04/10/2015 | $250,000 |
| 14 Maple Ave, Holbrook | 2,534 | 08/15/2002 | $285,000 |
| 264 Union Ave, Holbrook | 03/06/2006 | $354,000 | |
| 5 Smith Ave, Holbrook | 1,564 | ||
| 5140 Express Dr S, Holbrook | 08/18/2014 | $280,000 | |
| 233 Union Ave, Holbrook | 15,000 | 12/31/2014 | $2,500,000 |
| 19 Maple Ave, Holbrook | 1,176 | ||
| 100 Ackerly Ln, Holbrook | 1,249 | 10/25/2019 | $309,000 |
| 5136 Express Dr S, Holbrook | 02/27/2023 | $590,000 | |
| 160 Union Ave, Holbrook | 1,858 | 11/02/2020 | |
| 7 Maple Ave, Holbrook | 2,332 | ||
| 177 Mill Rd, Holbrook | 1,176 | ||
| 409 Union Ave, Holbrook | 1,607 | 09/15/2015 | $800,000 |
| 6 1st St, Holbrook | 1,204 | 07/24/2003 | $175,000 |
| 15 Coronado Rd, Holbrook | 1,782 | ||
| 415 Union Ave, Holbrook | 1,248 | ||
| 163 Union Ave, Holbrook | 3,196 | 04/30/2025 | $735,000 |
| 50 Holbrook Rd, Holbrook | 2,182 | 10/30/1996 | $134,260 |
| 26 Knickerbocker Ave, Holbrook | 662 |