| Primary address | 20 Delaware Avenue, Commack |
| Zip code | 11725 |
| County | Suffolk |
| Municipality | Smithtown |
| Parcel ID | 145-1-42 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Current property tax | $7,230 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.25 |
| Zoning district | Register |
| School district | Commack |
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:
Assessed at $3,850, the tax amount paid for 20 Delaware Avenue, Commack, NY 11725 is $9,914.
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 20 Delaware Avenue, Commack, including title documents, transfer conditions, mortgages and liens.
Access detailed property tax data for 20 Delaware Avenue, Commack, NY 11725. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Base tax | $9,914 |
| Current property tax | $7,230 |
| Market value | $447,675 |
| Assessed value | $3,850 |
Here's the assessment & property tax history for 20 Delaware Avenue, Commack, 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 | $447,675 | $3,850 | 2484.041 | $9,564 | +11.55% |
| 2023-2024 | $442,529 | $3,850 | 2226.929 | $8,574 | -2.61% |
| 2022-2023 | $550,000 | $3,850 | 2286.673 | $8,804 | -9.49% |
| 2021-2022 | $343,750 | $3,850 | 2526.564 | $9,727 | +1.86% |
| 2020-2021 | $334,783 | $3,850 | 2480.354 | $9,549 | -0.19% |
The complete history of permits filed for 20 Delaware Avenue, Commack, 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 Smithtown so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Smithtown and compare it to other neighborhoods in Suffolk County.
Create a free account to unlock extended information for 20 Delaware Avenue, Commack, 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 20 Delaware Avenue, Commack 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) |
|---|---|---|---|---|---|
| Sawmill Intermediate School | 6 | Public | 3-6 | 574 | 0.60 |
| The Jewish Academy | NR | Private | K-8 | 0 | 0.72 |
| Nassau/Suffolk Services-Autistic | NR | Private | 0 | 0.76 | |
| Nassau Suffolk Services for Autism | NR | Private | 25 | 0.81 | |
| Wood Park School | NR | Public | K-2 | 288 | 0.86 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| The Jewish Academy | NR | Private | K-8 | 0 | 0.72 |
| Nassau/Suffolk Services-Autistic | NR | Private | 0 | 0.76 | |
| Nassau Suffolk Services for Autism | NR | Private | 25 | 0.81 | |
| Commack Middle School | 7 | Public | 6-8 | 1,322 | 1.01 |
| The Children's Center At Ucp | NR | Private | 53 | 1.34 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Nassau/Suffolk Services-Autistic | NR | Private | 0 | 0.76 | |
| Nassau Suffolk Services for Autism | NR | Private | 25 | 0.81 | |
| The Children's Center At Ucp | NR | Private | 53 | 1.34 | |
| UCP-Assoc Greater Suffolk | NR | Private | 0 | 1.41 | |
| Sappo School | NR | Private | K-12 | 67 | 2.00 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 20 Delaware Avenue, Commack.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 6 Allegany Pl, Commack | 2,559 | 02/16/2022 | $1,220,000 |
| 6 Richmond Pl, Commack | 06/03/2019 | ||
| 11 Delaware Ave, Commack | 2,448 | 04/30/2015 | |
| 37 Delaware Ave, Commack | 04/02/2001 | $350,000 | |
| 8 Richmond Pl, Commack | 06/20/2023 | $645,000 | |
| 24 Delaware Ave, Commack | 982 | 12/28/2004 | $425,000 |
| 23 Delaware Ave, Commack | 06/04/2004 | ||
| 35 Delaware Ave, Commack | 02/01/2016 | ||
| 33 Delaware Ave, Commack | 1,660 | 02/26/2019 | $550,000 |
| 39 Delaware Ave, Commack | 982 | 09/27/2016 | $450,000 |
| 293 Harned Rd, Commack | 2,710 | 08/28/2018 | |
| 299 Harned Rd, Commack | 10/04/2011 | $449,000 | |
| 305 Harned Rd, Commack | 1,296 | 10/05/2023 | $350,000 |
| 1 Brian St, Commack | 2,436 | ||
| 22 Delaware Ave, Commack | 1,398 | 05/20/1996 | $165,000 |
| 21 Delaware Ave, Commack | 982 | 09/30/2016 | $395,000 |
| 313 Harned Rd, Commack | 01/26/2022 | ||
| 26 Delaware Ave, Commack | 06/29/2023 | ||
| 9 Delaware Ave, Commack | 1,466 | 07/21/2025 | $775,000 |
| 15 Delaware Ave, Commack | 12/22/2009 |