Nassau County  »  21 Ontario Ave

21 Ontario Avenue, Plainview, NY 11803 - Property report

Also known as: 21 Ontario Ave

Property image for 21 Ontario Avenue, Plainview, NY 11803
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Property type

One Family Year - Round Residence (210.01)

Year built

1952

Acreage

0.142

Sale price

$348,000

General information

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Access up-to-date information from property owner names to sales history, deeds, tax info, mortgages, development data, planimetric maps and more.

Address
Primary address
21 Ontario Avenue
ZIP code
11803
County
Nassau
Town/City
Oyster Bay
Village (SWIS code)
None (unincorporated town)
Parcel ID
12-9-62

Owner

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Sales
Sale date
12/11/2011
Sale price
$348,000
Arm's length
Tax
Tax year
2026
Current property tax
$18,458
Tax class
Zoning & Use
Zoning
R1-7
Building
Property type
One Family Year - Round Residence (210.01)
Building sq. ft.
2,143
Buildings on lot
1
Stories
1.7
Year built
1952
Rooms
8
Bathrooms
3
Exterior wall
Alum/Vinyl
Building style
Cape
Basement
Full
Attic
None
Heating type
Central/AC
Heating system
Central w ac
Lot
Acreage
0.142
Topography
Level
Land
Primary site

Area overview

Walk score
72 /100.  Very Walkable
Transit score
17 /100.  Minimal Transit
Bike score
56 /100.  Bikeable
School district
3019

View more such as transportation, nearby schools and risk designations.

Ownership

Ownership information for 21 Ontario Avenue, Plainview, NY

Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 21 Ontario Avenue, Plainview, NY 11803

Sale date Sale price Buyer name Seller name
12/11/2011 $348,000 XXXXX XXXXXXXX; XXXX XXXXXXXX XXXXX X'XXXXX; XXXXXXXX X'XXXXX; XXXXXX X'XXXXX

*Most recent sale on record for this property.

More about Nassau County property records.

Title documents

Date Type Amount Party 1 Party 2
01/04/2012 - R
12/11/2011 - D		 Deed XXXXX X'XXXXX XXXXX XXXXXXXX
03/10/2004 - R
11/21/2003 - D		 Deed XXXXXX XXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 21 Ontario Avenue, Plainview, NY

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax
Tax year
2026
Property tax
$18,458
Current school tax
Recent tax assessments
Market value
$604,000
Assessed value
$604
Transitional assessed value

More about Nassau County property taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year Market value Assessed value Tax rate Property tax Y-o-Y change
2026 $604,000 $604 3055.951 $18,458 +2.88%
2025 $604,000 $604 2970.267 $17,940 -1.49%
2024 $604,000 $573 3178.305 $18,212 -5.73%
2023 $578,000 $578 3342.412 $19,319 -13.71%
2022 $604,000 $604 3706.543 $22,388 -12.32%
2021 $607,000 $607 4206.654 $25,534 +26.11%
2020 $426,400 $1,066 1899.467 $20,248 +18.72%
2019 $380,400 $951 1793.496 $17,056 +6.06%
2018 $380,400 $951 1690.954 $16,081 +4.46%
2017 $380,400 $951 1618.749 $15,394 +6.17%
Permits

Permit information for 21 Ontario Avenue, Plainview, NY

No recently recorded permits for this property.

Neighborhood

Risk

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FEMA flood zones

FEMA flood zones
X

Transportation

Daily traffic map
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Access the detailed traffic volume map for 21 Ontario Avenue, Plainview, NY 11803 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
Our Lady Of Mercy School NR Private PK-8 195 0.31
Our Lady Of Mercy School NR Private PK-8 195 0.31
Stratford Road School 9 Public K-4 626 0.42
Woodland Avenue School 6 Public PK, K-5 349 0.59
Woodland Avenue School 6 Public PK, K-5 349 0.59
Pasadena Elementary School 9 Public K-4 439 0.63
East Street School 5 Public K-5 398 0.95
Baylis Elementary School 9 Public K-5 405 1.06
Plainview Old Bethpage Middle School 8 Public 5-8 889 1.10
Good Shepherd Lutheran School NR Private 0 1.18
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Our Lady Of Mercy School NR Private PK-8 195 0.31
Plainview Old Bethpage Middle School 8 Public 5-8 889 1.10
Good Shepherd Lutheran School NR Private 0 1.18
St Ignatius Loyola School NR Private PK, K-8 226 1.37
Trinity Lutheran School NR Private PK-8 196 1.57
Hicksville Middle School 4 Public 6-8 1,185 1.70
Long Island Christian Academy NR Private K-10 0 1.71
H B Thompson Middle School 9 Public 6-8 997 1.76
H B Mattlin Middle School 8 Public 5-8 772 1.91
John F Kennedy Middle School 8 Public 6-8 717 2.34
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Good Shepherd Lutheran School NR Private 0 1.18
Long Island Christian Academy NR Private K-10 0 1.71
Miss Sue's Nursery School and Kindergarten NR Private 0 1.94
Bethpage Senior High School 9 Public 9-12 932 1.95
Hicksville High School 6 Public 9-12 1,852 2.06
Plainview Old Bethpage JFK High School 10 Public 9-12 1,649 2.17
Fusion Academy Woodbury Ny NR Private 6-12 75 2.22
Carousel Day School NR Private 0 2.34
Jericho Senior High School 10 Public 9-12 1,258 2.61
P.S. 256 NR Public PK, K-12 500 3.03

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 21 Ontario Avenue, Plainview, NY

29 Ontario Ave, Plainview 14 Amby Ave, Plainview 3 Ontario Ave, Plainview 25 Ontario Ave, Plainview 23 Ontario Ave, Plainview 28 Amby Ave, Plainview 24 Amby Ave, Plainview 81 Parkview St, Plainview 4 Amby Ave, Plainview 27 Ontario Ave, Hicksville 31 Ontario Ave, Plainview 26 Amby Ave, Plainview 10 Amby Ave, Plainview 12 Amby Ave, Plainview 6 Amby Ave, Plainview 8 Amby Ave, Plainview 80 Elmwood St, Plainview 82 Parkview St, Plainview 82 Elmwood St, Plainview 30 Amby Ave, Plainview

Nearby ZIP codes for 21 Ontario Avenue, Plainview, NY

11554, Nassau County, NY 11568, Nassau County, NY 11590, Nassau County, NY 11714, Nassau County, NY 11724, Suffolk County, NY 11732, Nassau County, NY 11735, Nassau County, NY 11735, Suffolk County, NY 11743, Suffolk County, NY 11746, Suffolk County, NY 11747, Suffolk County, NY 11753, Nassau County, NY 11756, Nassau County, NY 11762, Nassau County, NY 11783, Nassau County, NY 11791, Nassau County, NY 11797, Nassau County, NY 11798, Suffolk County, NY 11801, Nassau County, NY 11804, Nassau County, NY

Frequently asked questions

What is the year built for 21 Ontario Avenue, Plainview, NY 11803?

The development at 21 Ontario Avenue, Plainview, NY 11803 was built in 1952.

What is the total square footage of 21 Ontario Avenue, Plainview, NY 11803?

21 Ontario Avenue, Plainview, NY 11803 has a total of 2,143 square feet.

When was 21 Ontario Avenue, Plainview, NY 11803 last sold and what was the sale price?

21 Ontario Avenue, Plainview, NY 11803 was last sold on 12/11/2011 for $348,000.

What is the assessed value of 21 Ontario Avenue, Plainview, NY 11803?

21 Ontario Avenue, Plainview, NY 11803 is currently assessed at $604.

What are the property taxes for 21 Ontario Avenue, Plainview, NY 11803?

The property taxes for 21 Ontario Avenue, Plainview, NY 11803 total $18,457.

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