Nassau County  »  11791  »  Alden Ave  »  21 Alden Ave

21 Alden Avenue, Syosset, NY 11791 - Property report

Also known as: 21 Alden Ave

Property image for 21 Alden Avenue, Syosset, NY 11791
static Mapbox map

Property type

One Family Year - Round Residence (210.01)

Year built

1955

Acreage

0.143

Sale price

$400,000

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 Alden Avenue
ZIP code
11791
County
Nassau
Town/City
Oyster Bay
Village (SWIS code)
None (unincorporated town)
Parcel ID
12-387-22

Owner

Find out who owns 21 Alden Avenue, Syosset, NY 11791. Uncover corporate and individual owners with a free account.

Sales
Sale date
09/07/2012
Sale price
$400,000
Arm's length
Tax
Tax year
2026
Current property tax
$14,424
Tax class
Zoning & Use
Zoning
R1-7
Building
Property type
One Family Year - Round Residence (210.01)
Building sq. ft.
1,120
Buildings on lot
1
Stories
1
Year built
1955
Rooms
6
Bathrooms
2
Exterior wall
Brick
Building style
Ranch
Basement
Full
Attic
None
Heating type
Central
Heating system
Hot water
Lot
Acreage
0.143
Topography
Level
Land
Primary site

Area overview

Walk score
39 /100.  Car-Dependent
Transit score
0 /100.  No Nearby Transit
Bike score
38 /100.  Somewhat Bikeable
School district
3014

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

Ownership

Ownership information for 21 Alden Avenue, Syosset, NY

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

Sales history for 21 Alden Avenue, Syosset, NY 11791

Sale date Sale price Buyer name Seller name
09/07/2012 $400,000 XXXXXX XXXXXX; XXXXXX XXXXXX XXXXX XXXXX X; XXXXXXXX XXXXX; XXXXXXXXX XXXXX; XXXXXXXX XXXXX

*Most recent sale on record for this property.

More about Nassau County property records.

Title documents

Date Type Amount Party 1 Party 2
05/15/2014 - R
01/13/2014 - D		 Deed XXXXXX XXXXXX & XXXXXX XXXXXX XXXXXX X & XXXXXX XXX
09/25/2012 - R
09/07/2012 - D		 Deed XXXXX XXXXX X XXXXXX XXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 21 Alden Avenue, Syosset, NY

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

Current property tax
Tax year
2026
Current property tax
$14,424
Base tax
$16,487
Current school tax
Recent tax assessments
Market value
$507,000
Assessed value
$507
Transitional assessed value
Exemptions

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 $507,000 $507 3251.91 $16,487 +2.96%
2025 $510,000 $510 3139.97 $16,014 -6.04%
2024 $557,000 $507 3361.673 $17,044 -11.79%
2023 $553,000 $553 3493.926 $19,321 -9.19%
2022 $557,000 $557 3820.056 $21,278 -9.47%
2021 $547,000 $547 4296.58 $23,502 +69.72%
2020 $294,400 $736 1881.494 $13,848 +6.54%
2019 $294,400 $736 1766.064 $12,998 +5.84%
2018 $294,400 $736 1668.546 $12,280 -12.60%
2017 $355,600 $889 1580.606 $14,052 +5.83%
Permits

Permit information for 21 Alden Avenue, Syosset, 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 Alden Avenue, Syosset, NY 11791 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)
Woodland Avenue School 6 Public PK, K-5 349 0.41
Woodland Avenue School 6 Public PK, K-5 349 0.41
South Grove Elementary School 9 Public K-5 416 0.70
Schechter School of Long Island NR Private K-5 114 0.74
Solomon Schechter Day School-Nassau NR Private K-5 0 0.80
Stratford Road School 9 Public K-4 626 0.91
Baylis Elementary School 9 Public K-5 405 0.95
George A Jackson School 9 Public K-5 462 0.95
Robbins Lane Elementary School 9 Public K-5 500 1.11
Our Lady Of Mercy School NR Private PK-8 195 1.12
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Our Lady Of Mercy School NR Private PK-8 195 1.12
H B Thompson Middle School 9 Public 6-8 997 1.35
St Ignatius Loyola School NR Private PK, K-8 226 1.70
Plainview Old Bethpage Middle School 8 Public 5-8 889 1.72
Jericho Middle School 9 Public 6-8 810 1.80
Trinity Lutheran School NR Private PK-8 196 1.83
Good Shepherd Lutheran School NR Private 0 1.85
Fusion Academy Woodbury Ny NR Private 6-12 75 1.94
Hicksville Middle School 4 Public 6-8 1,185 2.10
P.S. 256 NR Public PK, K-12 500 2.51
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Jericho Senior High School 10 Public 9-12 1,258 1.80
Good Shepherd Lutheran School NR Private 0 1.85
Fusion Academy Woodbury Ny NR Private 6-12 75 1.94
Long Island Christian Academy NR Private K-10 0 2.01
Hicksville High School 6 Public 9-12 1,852 2.40
P.S. 256 NR Public PK, K-12 500 2.51
New York Christian Center Academy NR Private PK, K-12 71 2.52
Carousel Day School NR Private 0 2.53
Plainview Old Bethpage JFK High School 10 Public 9-12 1,649 2.75
Bethpage Senior High School 9 Public 9-12 932 2.87

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

Neighbors for 21 Alden Avenue, Syosset, NY

4 Birchwood Park Dr, Syosset 6 Birchwood Park Dr, Syosset 47 Birchwood Park Dr, Syosset 133 Ketchams Rd, Syosset 129 Ketchams Rd, Syosset 19 Alden Ave, Syosset 45 Birchwood Park Dr, Syosset 137 Ketchams Rd, Syosset 135 Ketchams Rd, Syosset 17 Alden Ave, Syosset 2 Birchwood Park Dr, Syosset 8 Birchwood Park Dr, Syosset 10 Birchwood Park Dr, Syosset 4 Morris Dr, Syosset 139 Ketchams Rd, Syosset 125 Ketchams Rd, Syosset 6 Morris Dr, Syosset 131 Ketchams Rd, Syosset 127 Ketchams Rd, Syosset 8 Morris Dr, Syosset

Nearby ZIP codes for 21 Alden Avenue, Syosset, NY

11545, Nassau County, NY 11548, Nassau County, NY 11554, Nassau County, NY 11560, Nassau County, NY 11568, Nassau County, NY 11590, Nassau County, NY 11709, Nassau County, NY 11714, Nassau County, NY 11724, Suffolk County, NY 11732, Nassau County, NY 11743, Suffolk County, NY 11747, Suffolk County, NY 11753, Nassau County, NY 11756, Nassau County, NY 11765, Nassau County, NY 11797, Nassau County, NY 11801, Nassau County, NY 11804, Nassau County, NY

Frequently asked questions

What is the year built for 21 Alden Avenue, Syosset, NY 11791?

The development at 21 Alden Avenue, Syosset, NY 11791 was built in 1955.

What is the total square footage of 21 Alden Avenue, Syosset, NY 11791?

21 Alden Avenue, Syosset, NY 11791 has a total of 1,120 square feet.

When was 21 Alden Avenue, Syosset, NY 11791 last sold and what was the sale price?

21 Alden Avenue, Syosset, NY 11791 was last sold on 09/07/2012 for $400,000.

What is the assessed value of 21 Alden Avenue, Syosset, NY 11791?

21 Alden Avenue, Syosset, NY 11791 is currently assessed at $507.

What are the property taxes for 21 Alden Avenue, Syosset, NY 11791?

The property taxes for 21 Alden Avenue, Syosset, NY 11791 total $16,487.

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