| Primary address | 21 William Road, Massapequa |
| Zip code | 11758 |
| County | Nassau |
| Town/City | Oyster Bay |
| Village (swiss code) | None (unincorporated town) |
| Parcel ID | 52-392-3 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Building sqft | 1,008 |
| Building class | One Family Year - Round Residence (210.01) |
| Land | Primary site |
| Topography | Level |
| Acreage | 0.145 |
| Buildings on lot | 1 |
| Year built | 1953 |
| Stories | 1 |
| Style | Ranch |
| Rooms | 5 |
| Bathrooms | 1 |
| Attic | None |
| Basement | Full |
| Exterior wall | Alum/Vinyl |
| Heating type | Central |
| Heating system | Hot water |
| Zoning district | Register (See more on map) |
| School district | Plainedge UFSD |
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 William Road, Massapequa, NY 11758 was built in 1953 and has a total of 1,008 square feet.
What is the assessed value of 21 William Road, Massapequa, NY 11758 and the property tax paid?Assessed at $475, the tax amount paid for 21 William Road, Massapequa, NY 11758 is $15,632.
When was 21 William Road, Massapequa, NY 11758 last sold and what was the last sale price?21 William Road, Massapequa, NY 11758 was last sold in 07/25/2025 for $727,000.
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 William Road, Massapequa, 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 William Road, Massapequa, NY 11758. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2026 |
| Base tax | $15,632 |
| Current property tax | $14,539 |
| Tax class | Register |
| Market value | $475,000 |
| Assessed value | $475 |
Here's the assessment & property tax history for 21 William Road, Massapequa, 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 | $475,000 | $475 | 3214.747 | $15,270 | -7.02% |
| 2024 | $474,841 | $475 | 3457.576 | $16,423 | -5.68% |
| 2023 | $475,000 | $475 | 3665.913 | $17,413 | -11.22% |
| 2022 | $475,000 | $475 | 4129.183 | $19,614 | -11.25% |
| 2021 | $455,000 | $455 | 4856.978 | $22,099 | +32.66% |
The complete history of permits filed for 21 William Road, Massapequa, 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 William Road, Massapequa, 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 William Road, Massapequa 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) |
|---|---|---|---|---|---|
| The Hagedorn Little Village School | NR | Private | PK-6 | 268 | 0.16 |
| The Hagedorn Little Village School | NR | Private | PK-6 | 268 | 0.16 |
| East Broadway School | 6 | Public | K-5 | 676 | 0.50 |
| Eastplain School | 6 | Public | PK, K-5 | 431 | 0.56 |
| Eastplain School | 6 | Public | PK, K-5 | 431 | 0.56 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Maria Regina Elementary School | NR | Private | PK-8 | 345 | 0.93 |
| Jonas E Salk Middle School | 7 | Public | 6-8 | 947 | 1.38 |
| Island Trees Middle School | 7 | Public | 5-8 | 657 | 1.40 |
| Plainedge Middle School | 6 | Public | 6-8 | 663 | 1.43 |
| Seaford Middle School | 9 | Public | 6-8 | 517 | 1.51 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Plainedge Senior High School | 8 | Public | 9-12 | 845 | 0.64 |
| Island Trees High School | 9 | Public | 9-12 | 727 | 1.24 |
| Gen Douglas Macarthur Senior High School | 10 | Public | 9-12 | 1,277 | 1.31 |
| Seaford Senior High School | 9 | Public | 9-12 | 658 | 1.58 |
| Mhs Ames Campus | NR | Public | 9 | 442 | 1.72 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 William Road, Massapequa.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 39 William Rd, Massapequa | 1,052 | 12/23/2020 | $425,000 |
| 63 William Rd, Massapequa | 1,052 | 05/02/2011 | $410,000 |
| 77 Daniel Rd, Massapequa | 1,304 | 12/11/2018 | |
| 59 Daniel Rd, Massapequa | 1,213 | 10/13/2022 | |
| 65 Daniel Rd N, Massapequa | 1,712 | 06/07/2016 | |
| 33 William Rd, Massapequa | 2,298 | 05/31/2013 | $389,999 |
| 69 William Rd, Massapequa | 2,331 | 07/29/2019 | |
| 75 William Rd, Massapequa | 1,184 | 05/27/2016 | $395,000 |
| 71 Daniel Rd N, Massapequa | 1,657 | 08/19/2022 | |
| 81 William Rd, Massapequa | 984 | 11/01/1995 | $176,000 |
| 83 N Daniel Rd, Massapequa | 1,213 | 04/20/2009 | |
| 2 Daniels Rd, Massapequa | 984 | 10/10/2013 | $387,000 |
| 53 Daniel Rd, Massapequa | 1,213 | ||
| 2 Joseph Rd, Massapequa | 1,223 | 12/03/2019 | $489,000 |
| 27 William Rd, Massapequa | 1,166 | ||
| 45 William Rd, Massapequa | 1,052 | 08/25/2022 | $595,000 |
| 57 William Rd, Massapequa | 984 | 07/12/2018 | |
| 15 William Rd, Massapequa | 1,262 | 12/01/2005 | $87,000 |
| 51 William Rd, Massapequa | 2,226 | 12/01/2000 | $370,000 |
| 89 Daniel Rd, Massapequa | 1,213 | 04/28/1999 | $213,000 |