Nassau County  »  20 Hamilton Ave

20 Hamilton Avenue, Oyster Bay, NY 11771 Property Information

20 Hamilton Avenue, Oyster Bay, NY 11771 Property Information

  • General
  • Owner
  • Documents
  • Tax
  • Permits
  • Neighborhood
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20 Hamilton Avenue, Oyster Bay, NY 11771
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Address

Primary address 20 Hamilton Avenue, Oyster Bay
Zip code 11771
County Nassau
Town/City Oyster Bay
Village (swiss code) None (unincorporated town)
Parcel ID 27-A-26

Sales & Tax Overview for 20 Hamilton Avenue, Oyster Bay

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Sale date 08/01/2022
Sale price $1,350,000
Arm's length
Current property tax $27,327

Lot & Building Information for 20 Hamilton Avenue, Oyster Bay

Building sqft 1,456
Building class Multiple Residences (280.02)
Land Primary site
Topography Level
Acreage 0.201
Buildings on lot 3
Year built 1920
Stories 1
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Zoning, Use & Area Overview

Walk Score
Transit Score
Bike Score


Capitalization rate
Street Paved
Traffic Medium
Area type Neighborhood or spot
School district Oyster Bay

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Commercial Buildings

Square footage Structure Grade Year built Stories
1,456 Apartments-4 to 6 units C- 1920 1
1,380 Apartments-4 to 6 units C- 1863 1
825 Warehouse 1-10000 sf C- 1903 1

Floor Distribution

Floors Square footage Use Construction Condition Exterior wall Heating Plumbing
B1-B1 676 Unfin res bsmt
01-01 704 Apt 4 to 6 units
01-01 825 Whse 0 - 10,000 sf
01-01 1,176 Apt 4 to 6 units
02-02 280 Apt 4 to 6 units

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Apartment Mix

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Income and Expenses

Check out a breakdown by type of rentable square feet and the rent charged for each, including detailed info on expenses, gross/net income, income and expense rate.

Other Property Data for 20 Hamilton Avenue, Oyster Bay

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  • • Improvements for 20 Hamilton Avenue, Oyster Bay , including their type, square footage, grade and when they were built.
  • Development maps such as planimetric, zoning, land use and urban landscape maps (building age and stories).
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About 20 Hamilton Avenue, Oyster Bay

What is the year built & the total sq. ft. for 20 Hamilton Avenue, Oyster Bay, NY 11771?

20 Hamilton Avenue, Oyster Bay, NY 11771 was built in 1920 and has a total of 1,456 square feet.

What is the assessed value of 20 Hamilton Avenue, Oyster Bay, NY 11771 and the property tax paid?

Assessed at $4,865, the tax amount paid for 20 Hamilton Avenue, Oyster Bay, NY 11771 is $27,327.

When was 20 Hamilton Avenue, Oyster Bay, NY 11771 last sold and what was the last sale price?

20 Hamilton Avenue, Oyster Bay, NY 11771 was last sold in 08/01/2022 for $1,350,000.

How many residential units does this building have?

This building has 6 residential unit(s).

Ownership Information

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Real Estate Reports:
Laura Pop-Badiu, May 21, 2026 How to Find Land Boundaries: Free & Paid Methods
If you need to find land boundaries fast, you can start with a free county parcel/GIS viewer or a premium platform like PropertyShark to see an approximate parcel outline and lot data. However, keep in mind that a web-based land boundaries map is a starting point, not the legal finish line.
Laura Pop-Badiu, May 07, 2026 Locked-In Owners, Mobile Renters: Homeowners Stay Put as Renters Move 3.7x More Across Largest U.S. Cities 
Renters became the primary drivers of long-distance mobility across the largest U.S. cities, moving 3.7 times more than owners in 2024, as high mortgage rates and housing costs kept many homeowners in place.
Eliza Theiss, Apr 23, 2026 $4.6M Hudson Yards Maintains Top Spot, Luxury Sales in Malba Set $2.5M Price Record for Queens
Despite prices declining, Hudson Yards remained the most expensive NYC neighborhood, but TriBeCa’s growth closed the gap to under $400,000, while Malba set a new historic price record for Queens at $2.5 million, securing the highest ranking ever for the borough at #5.
Research 100M+ property records powered by:
  • 2000+ governmental and public data sources
  • 80 dedicated analysts and researchers
  • 20+ years of real estate experience
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Past Sales & Property History for 20 Hamilton Avenue, Oyster Bay

Create a free account to view the complete sales history for 20 Hamilton Avenue, Oyster Bay, including title documents, transfer conditions, mortgages and liens.

Purchase date Purchase price Buyer name Seller name
08/01/2022 $1,350,000
06/24/2022 $1,350,000
03/21/2006 $750,000
       
       
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*Here are the three most recent sales for this property.


Title Documents for 20 Hamilton Avenue, Oyster Bay

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.

Date Type Amount Party 1 Party 2
08/01/2022 - R Other
(Mortgage agreement)
08/01/2022 - R Deed
(Deed four family dwelling)
06/24/2022 - D
08/01/2022 - R
Deed
(Deed four family dwelling)
06/24/2022 - D
08/01/2022 - R
Mortgage
(Mortgage and security agreement)
03/21/2006 - D
04/21/2006 - R
Deed
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R: Recorded date
D: Document date

Property Taxes for 20 Hamilton Avenue, Oyster Bay

Access detailed property tax data for 20 Hamilton Avenue, Oyster Bay, NY 11771. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year 2026
Property tax $27,327
Tax class
Market value $486,500
Assessed value $4,865
Transitional assessed value

Assessment History for 20 Hamilton Avenue, Oyster Bay

Here's the assessment & property tax history for 20 Hamilton Avenue, Oyster Bay, 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
2026 $486,500 $4,865 561.709 $27,327 +2.07%
2025 $486,500 $4,865 550.336 $26,774 +7.36%
2024 $486,480 $4,865 535.272 $24,938 -6.87%
2023 $486,500 $4,865 560.805 $26,778 -3.67%
2022 $486,500 $4,865 571.415 $27,799 -8.22%

Permits for 20 Hamilton Avenue, Oyster Bay

The complete history of permits filed for 20 Hamilton Avenue, Oyster Bay, 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.

Data not available for this property.

Demographics by Zip Code

Total population 10,908
Median age 41.1
Average household income $253,503
Family households 73.2%
Occupied housing units 3,961
Owner occupied units 74.6%
Average number of people per household 2.74
Median year structure built 1960
Median value for units with a mortgage $937,400
Median value for units without a mortgage $934,700

Risk

Create a free account to unlock extended information for 20 Hamilton Avenue, Oyster Bay, 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) 0.2, X (See more on map)

Transportation

Access the detailed traffic volume map for 20 Hamilton Avenue, Oyster Bay 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

Neighbors for 20 Hamilton Avenue, Oyster Bay

Here are the neighbors for 20 Hamilton Avenue, Oyster Bay.

Address Square feet Purchase date Purchase price
1 Bay View Ave, Oyster Bay 08/03/2016
38 Hamilton Ave, Oyster Bay 2,299 08/29/2000 $500,000
60 Maxwell Ave, Oyster Bay 1,370 10/11/1996
4 Hamilton Ave, Atlantic Beach 3,575 03/07/2025
14 Hamilton Ave, Oyster Bay 3,000 08/13/2013
34 Hamilton Ave, Oyster Bay 1,778
42 Hamilton Ave, Oyster Bay 2,456 10/07/2020
24 Hamilton Ave, Oyster Bay 3,252 04/29/2015
25 W End Ave, Oyster Bay 4,720
50 Hamilton Ave, Oyster Bay 1,456 08/29/2000 $650,000
46 Hamilton Ave, Oyster Bay 1,621 08/29/2000 $350,000
150 Pine Hollow Rd, Oyster Bay 35,369 06/18/2015 $5,250,000
1147 Bayview Ave, Oyster Bay 3,600 12/13/1999 $1,600,000
1 Bay Ave, Oyster Bay 8,148 12/17/1999 $325,000
7 Irving Pl, Oyster Bay
2 South St, Oyster Bay 1,846 09/28/2000 $454,750
30 Hamilton Ave, Oyster Bay 2,920 03/30/2020 $1,200,000
72 Hamilton Ave, Oyster Bay 4,164 06/12/2015 $800,000
34 South St, Oyster Bay 1,728 09/28/2000 $965,000
10-14 Bay Ave, Oyster Bay 2,670 09/25/1998 $200,000

Nearby ZIP Codes for 20 Hamilton Avenue, Oyster Bay

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