Nassau County  »  11791  »  Underhill Blvd  »  485 Underhill Blvd

485 Underhill Boulevard, Syosset, NY 11791 - Property report

Also known as: 485 Underhill Blvd

Property image for 485 Underhill Boulevard, Syosset, NY 11791
static Mapbox map

Property type

Office Building (464.14)

Year built

1985

Acreage

1.98

Sale price

$8,100,000

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
485 Underhill Boulevard
ZIP code
11791
County
Nassau
Town/City
Oyster Bay
Village (SWIS code)
None (unincorporated town)
Parcel ID
15-169-17

Owner

Find out who owns 485 Underhill Boulevard, Syosset, NY 11791. Uncover corporate and individual owners with a free account.

Building
Property type
Office Building (464.14)
Building sq. ft.
35,889
Buildings on lot
1
Stories
1
Year built
1985
Sales
Sale date
06/29/2006
Sale price
$8,100,000
Arm's length
Tax
Tax year
2026
Current property tax
$277,844
Tax class
Zoning & Use
Zoning
Capitalization rate
Area type
Commercial/Industrial park
Lot
Acreage
1.98
Topography
Level
Land
Primary site

Area overview

Walk score
51 /100.  Somewhat Walkable
Transit score
0 /100.  Minimal Transit
Bike score
46 /100.  Somewhat Bikeable
School district
3014
Street
Paved
Traffic
Medium

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

Commercial Buildings

Sq. ft. Structure Grade Year built Stories
35,889 Office bldg lr 1-3s B 1985 1
Floor distribution
Floors Sq. ft. Use Construction Condition Exterior wall Heating Air conditioning Plumbing
B1-B1 11,896 Parking garage
01-01 11,896 Offices Central
02-02 11,896 Offices Central
03-03 12,097 Offices Central
Ownership

Ownership information for 485 Underhill Boulevard, Syosset, NY

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

Sales history for 485 Underhill Boulevard, Syosset, NY 11791

Sale date Sale price Buyer name Seller name
06/29/2006 $8,100,000 XXX XXXXXXXXX XXXX XXX XXXXXXX XXXXX XXXXXX

*Most recent sale on record for this property.

More about Nassau County property records.

Title documents

Date Type Amount Party 1 Party 2
07/16/2026 - R Other
(Mortgage agreement)		 XXX XXXXXXXXX XXXX XXX XXXXXX XXXXXXXX XXXX
07/16/2026 - R Other
(Mortgage agreement)		 XXX XXXXXXXXX XXXX XXX XXXXXX XXXXXXXX XXXX
07/16/2026 - R Assignment
(Assign mortgage)		 XXX XXX XXXX XXXXXXX XXX XXXXXX XXXXXXXX XXXX
07/16/2026 - R Other
(Mortgage agreement)		 XXX XXX XXXX XXXXXXX XXX XXX XXXXXXXXX XXXX XXX
07/16/2026 - R
07/01/2026 - D		 Mortgage
(Mtg-mortgage)		 XXX XXXXXXXXX XXXX XXX XXXXXX XXXXXXXX XXXX
06/27/2024 - R Other
(Mortgage agreement)		 XXXXXXXXX XXXXXX XXXX XX XXX XXX XXXX XXXXXXX XXX
06/27/2024 - R Assignment
(Assign mortgage)		 XXXXXXXXX XXXXXX XXXX XX XXX XXX XXXX XXXXXXX XXX
06/27/2024 - R Other
(Mortgage agreement)		 XXXXXXXXX XXXX XXX XXXX XXX XXXX XXXXXXXXX XXXXXX XXXX XX
06/27/2024 - R Assignment
(Assign mortgage)		 XXXXXXXXX XXXX XXX XXXX XXX XXXX XXXXXXXXX XXXXXX XXXX XX
10/03/2006 - R
08/22/2006 - D		 Deed XXXXX XXXXXXXX, XXX XXX XXXXXXXXX XXXXXXXXX, XXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 485 Underhill Boulevard, 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
$277,844
Tax class
Base tax
$294,946
Recent tax assessments
Market value
$4,318,400
Assessed value
$43,184
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 $4,318,400 $43,184 682.999 $294,946 +10.40%
2025 $4,005,500 $40,055 666.972 $267,156 -5.13%
2024 $4,673,000 $43,907 644.549 $281,591 +0.97%
2023 $4,673,000 $46,730 686.201 $278,879 -16.80%
2022 $4,673,000 $46,730 717.269 $335,180 -28.72%
2021 $6,154,400 $61,544 764.093 $470,253 +63.76%
2020 $3,350,600 $33,506 857.052 $287,164 +5.64%
2019 $3,350,600 $33,506 811.322 $271,842 -2.15%
2018 $3,350,600 $33,506 829.133 $277,809 -2.27%
2017 $3,644,600 $36,446 779.92 $284,250 +4.88%
Permits

Permit information for 485 Underhill Boulevard, Syosset, NY

No recently recorded permits for this property.

Neighborhood

Demographics by ZIP code

Total population
25,520
Median age
43.2
Average household income
$276,174
Family households
83.9%
People per household (average)
3.11
Occupied housing units
8,113
Owner-occupied units
93.5%
Median year structure built
1959
Median value mortgaged units
$968,800
Median value unmortgaged units
$878,600

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 485 Underhill Boulevard, Syosset, NY 11791 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Neighbors for 485 Underhill Boulevard, Syosset, NY

8 Dorothy St, Syosset 10 Jean Pl, Syosset 140 Eileen Way, Syosset 345 Underhill Blvd, Syosset 2 Dorothy St, Syosset 425 Underhill Blvd, Syosset 325 Underhill Blvd, Syosset 15 Lenore St, Syosset 12 Jean Pl, Syosset 26 Cedar St, Syosset 575 Underhill Blvd, Syosset 6 Dorothy St, Syosset 14 Jean Pl, Syosset 475 Underhill Blvd, Syosset 313 Underhill Blvd, Syosset 225 Underhill Blvd, Syosset 24 Cedar St, Syosset 4 Dorothy St, Syosset 28 Cedar St, Syosset 2 Lesley Dr, Syosset

Nearby ZIP codes for 485 Underhill Boulevard, 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 485 Underhill Boulevard, Syosset, NY 11791?

The development at 485 Underhill Boulevard, Syosset, NY 11791 was built in 1985.

What is the market value of 485 Underhill Boulevard, Syosset, NY 11791?

The current market value of 485 Underhill Boulevard, Syosset, NY 11791 is $4,318,400.

What is the total square footage of 485 Underhill Boulevard, Syosset, NY 11791?

485 Underhill Boulevard, Syosset, NY 11791 has a total of 35,889 square feet.

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