Nassau County  »  11791  »  Williams Ave  »  18 Williams Ave

18 Williams Avenue, Syosset, NY 11791 - Property report

Also known as: 18 Williams Ave

Property image for 18 Williams Avenue, Syosset, NY 11791
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Property type

One Family Year - Round Residence (210.01)

Year built

1955

Acreage

0.194

Sale price

$625,000

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
18 Williams Avenue
ZIP code
11791
County
Nassau
Town/City
Oyster Bay
Village (SWIS code)
None (unincorporated town)
Parcel ID
15-80-27

Owner

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Sales
Sale date
07/25/2018
Sale price
$625,000
Arm's length
Tax
Tax year
2026
Current property tax
$15,316
Tax class
Zoning & Use
Zoning
R1-7
Building
Property type
One Family Year - Round Residence (210.01)
Building sq. ft.
1,411
Buildings on lot
1
Stories
1
Year built
1955
Rooms
6
Bathrooms
2
Exterior wall
Alum/Vinyl
Building style
Ranch
Basement
Full
Attic
None
Heating type
Central/AC
Heating system
Central w ac
Lot
Acreage
0.194
Topography
Level
Land
Primary site

Area overview

Walk score
54 /100.  Somewhat Walkable
Transit score
0 /100.  Minimal Transit
Bike score
41 /100.  Somewhat Bikeable
School district
3014

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

Ownership

Ownership information for 18 Williams Avenue, Syosset, NY

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

Sales history for 18 Williams Avenue, Syosset, NY 11791

Sale date Sale price Buyer name Seller name
07/25/2018 $625,000 XXXXX XXXXXXX XXXXXXX X XXXXX XXXXX XXXXXXXXXX XXXXX; XXXXXX X XXXXX XXX
08/03/2004 $555,000 XXXXX XXXXXXX XXXXXXXXXXX XXXXXXXX
10/14/1998 $225,000 XXXXXXXXXXX XXXXXXXX XXX XXXXXXXX XXXXXXX XXXXXXX

*Most recent sales on record for this property.

More about Nassau County property records.

Title documents

Date Type Amount Party 1 Party 2
12/24/2020 - R Other
(Mortgage agreement)		 XXXXX XXXXXXX XXXXXXXX XXXXX XXXX XX
12/24/2020 - R
06/12/2020 - D		 Mortgage
(Gap)		 XXXXX XXXXXXX XXXXXXXX XXXXX XXXX XX
08/10/2018 - R Other
(Mortgage satisfaction)		 XXXXX XXXXXXX X XXXXXXXX XXXXX XXXX XX
08/09/2018 - R
07/25/2018 - D		 Deed XXXXXXX X XXXXX XXXXX XXXXXXXXXX XXXXX XXXXX XXXXXXX
08/09/2018 - R
07/25/2018 - D		 Mortgage
(Fixed rate)		 XXXXX XXXXXXX XXXXXXXX XXXXX XXXX XX
07/03/2017 - R
06/16/2017 - D		 Deed XXXXX XXXXXXX X XXXXX XXXXXX X & XXXXX X XXXXXXXX
01/27/2012 - R
01/10/2012 - D		 Deed XXXXX XXXXXXX
09/08/2004 - R
08/03/2004 - D		 Deed XXXXXXXXXXX XXXXXXXX XXXXX XXXXXXX
12/02/1998 - R
10/14/1998 - D		 Deed XXXXXXX XXXXXXX XXXXXXXXXXX XXXXXXXX XXX XXXXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 18 Williams 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
$15,316
Base tax
$17,007
Current school tax
Recent tax assessments
Market value
$523,000
Assessed value
$523
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 $523,000 $523 3251.91 $17,007 +2.58%
2025 $528,000 $528 3139.97 $16,579 -9.18%
2024 $593,000 $543 3361.673 $18,254 -13.50%
2023 $604,000 $604 3493.926 $21,103 -6.84%
2022 $593,000 $593 3820.056 $22,653 -13.85%
2021 $612,000 $612 4296.58 $26,295 +39.34%
2020 $401,200 $1,003 1881.494 $18,871 +6.54%
2019 $401,200 $1,003 1766.064 $17,714 +5.84%
2018 $401,200 $1,003 1668.546 $16,736 +5.56%
2017 $401,200 $1,003 1580.606 $15,853 +5.83%
Permits

Permit information for 18 Williams 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
View daily traffic map

Access the detailed traffic volume map for 18 Williams 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)
Willits Elementary School 9 Public K-5 305 0.36
South Grove Elementary School 9 Public K-5 416 0.38
Baylis Elementary School 9 Public K-5 405 0.88
St Edward Confessor School NR Private PK-8 265 1.04
St Edward Confessor School NR Private PK-8 265 1.04
Robbins Lane Elementary School 9 Public K-5 500 1.19
Village Elementary School 9 Public K-5 415 1.19
Judy Jacobs Parkway Elementary School 8 Public K-4 392 1.36
Woodland Avenue School 6 Public PK, K-5 349 1.43
Woodland Avenue School 6 Public PK, K-5 349 1.43
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
H B Thompson Middle School 9 Public 6-8 997 0.50
St Edward Confessor School NR Private PK-8 265 1.04
Fusion Academy Woodbury Ny NR Private 6-12 75 1.08
P.S. 256 NR Public PK, K-12 500 1.45
Plainview Old Bethpage Middle School 8 Public 5-8 889 1.94
Our Lady Of Mercy School NR Private PK-8 195 2.01
South Woods Middle School 8 Public 6-8 746 2.05
Good Shepherd Lutheran School NR Private 0 2.10
Jericho Middle School 9 Public 6-8 810 2.18
The Center For Developmental Disabilities NR Private 105 2.25
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Fusion Academy Woodbury Ny NR Private 6-12 75 1.08
P.S. 256 NR Public PK, K-12 500 1.45
Our Lady Of Mercy Academy NR Private 9-12 359 1.63
Syosset Senior High School 10 Public 9-12 2,266 2.02
Good Shepherd Lutheran School NR Private 0 2.10
Jericho Senior High School 10 Public 9-12 1,258 2.18
The Center For Developmental Disabilities NR Private 105 2.25
Long Island Lutheran Middle & High School NR Private 6-12 439 2.70
Plainview Old Bethpage JFK High School 10 Public 9-12 1,649 2.71

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

Neighbors for 18 Williams Avenue, Syosset, NY

27 Underhill Ave, Syosset 6 Williams Ave, Syosset 38 Underhill Ave, Syosset 6 Willets Ave, Syosset 14 Williams Ave, Syosset 31 Underhill Ave, Syosset 12 Williams Ave, Syosset 4 Willams Ave, Syosset 32 A Underhill Ave, Syosset 8 Willets Ave, Syosset 20 Williams Ave, Syosset 10 Willets Ave, Syosset 22 Williams Ave, Syosset 32 Underhill Ave, Syosset 29 Underhill Ave, Syosset 12 Willets Ave, Syosset 16 Williams Ave, Syosset 10 Williams Ave, Syosset 8 Williams Ave, Syosset 1 Hicks Ln, Syosset

Nearby ZIP codes for 18 Williams 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 18 Williams Avenue, Syosset, NY 11791?

The development at 18 Williams Avenue, Syosset, NY 11791 was built in 1955.

What is the total square footage of 18 Williams Avenue, Syosset, NY 11791?

18 Williams Avenue, Syosset, NY 11791 has a total of 1,411 square feet.

When was 18 Williams Avenue, Syosset, NY 11791 last sold and what was the sale price?

18 Williams Avenue, Syosset, NY 11791 was last sold on 07/25/2018 for $625,000.

What is the assessed value of 18 Williams Avenue, Syosset, NY 11791?

18 Williams Avenue, Syosset, NY 11791 is currently assessed at $523.

What are the property taxes for 18 Williams Avenue, Syosset, NY 11791?

The property taxes for 18 Williams Avenue, Syosset, NY 11791 total $17,007.

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