Off Market Oct 2025 for $1M

$1,350,540

Est. refi paymentEst. refi $6,268/mo

•

2,174

sq ft

21 Hillvale, Syosset, NY 11791

About this home

Exceptional opportunity to own this magnificent one-of-a-kind split perfectly situated in the prime area of Syosset. This stunning 3-bedroom, 2.5 bathroom offers everything one could want in sophisticated and comfortable living. Step into a bright open concept main level with a living room, dining room, inviting and spacious eat-in kitchen with gleaming hardwood floors, and a vaulted ceiling with skylights. The lower level features a fabulous den that offers a perfect place to relax and provides easy access to garage and finished basement. The second level includes a primary bedroom with an en-suite full bath, 2 additional bedrooms, and a hallway bath. This charmer boasts a 2-car garage with a long driveway, central air conditioning, an exquisite architectural landscaped yard with in ground sprinklers and a nice deck, perfect for entertaining.

Single-familyProperty Type

1955Year Built

$621Est. Price/Sq.Ft.

2 garage spacesParking

Listing by Pierre Fritz Bruno • Coldwell Banker American Homes

Contact: 516-223-2525

Bought with Pierre Fritz Bruno • Coldwell Banker American Homes

Redfin checked: a few seconds ago

•Source:OneKey® MLS as Distributed by MLS Grid #888023

Redfin Estimate

$1,350,540

$316K since sold in October 2025$48K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 10.8% higher than the average sale price ($1.22M) of 6 comparable homes.

SOLD JUL 17, 2026
$1,250,000
A
3 beds2.5 baths2,300 sq ft
24 Mesa Rd, Syosset, NY 11791
Listing by Real Broker NY LLC
SOLD MAY 27, 2026
$1,340,000
B
3 beds2.5 baths1,796 sq ft
5 Hillvale Rd, Syosset, NY 11791
Listing by H N L Realty Inc
SOLD APR 30, 2026
$1,314,500
C
3 beds2.5 baths1,885 sq ft
15 Center Dr, Syosset, NY 11791
Listing by Coldwell Banker American Homes
SOLD JUL 15, 2026
$1,200,000
D
3 beds2 baths1,789 sq ft
16 Hillvale Rd, Syosset, NY 11791
Listing by Integrity Core Realty
SOLD APR 30, 2026
$960,000
E
3 beds3 baths1,696 sq ft
8 Westminster Rd, Syosset, NY 11791
Listing by Compass Greater NY LLC
SOLD JUL 23, 2026
$1,250,000
F
3 beds2 baths1,671 sq ft
5 Joseph Ct, Syosset, NY 11791
Listing by E Realty International Corp

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Earn from this home

Sell

$454,934

Est. take-home

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Refinance

Est. cash available

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Rent

$5,122/mo

Redfin rental estimate

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Market trends in 11791, NY

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

99.8%

+0.3% MoM

Median sale price

$1.3M

$5K MoM

Avg. days on market

29d

7 days MoM

Recently sold homes

12 MoM

New listings for sale

FOR SALE BY OWNER
$1,350,000
4 beds1 bath2,069 sq ft
4 Betty St, Syosset, NY 11791
FOR SALE BY OWNER
$1,250,000
4 beds3 baths2,354 sq ft
12 Walters Ave, Syosset, NY 11791
OPEN SAT, 1PM TO 3PM
$899,000
3 beds2.5 baths1,978 sq ft
151 The Knl, Syosset, NY 11791
Listing by Good Choice Realty & Mgmt Corp
$2,099,000
5 beds3.5 baths4,023 sq ft
70 Juniper Ln, Muttontown, NY 11791
Listing by Compass Greater NY LLC
3D WALKTHROUGH
$1,499,888
4 beds2.5 baths2,736 sq ft
47 Syosset Cir, Syosset, NY 11791
Listing by Corcoran SRG Residential
$1,699,999
6 beds5 baths3,400 sq ft
6 Garden Cir, Syosset, NY 11791
Listing by BH&G R E Realty Connect
$1,100,000
3 beds2.5 baths1,658 sq ft
12 Leonard Rd, Syosset, NY 11791
Listing by HomeSmart Premier Living Rlty
See all

Provided by Redfin

Sale history for 21 Hillvale

Date

Event

Price

Public Records

Oct 29, 2025

Sold

$1,030,000

$474/sq ft

OneKey® MLS as Distributed by MLS Grid #888023

Oct 8, 2025

Sold

$1,035,000

$476/sq ft

Aug 1, 2025

Pending

—

Jul 10, 2025

Listed

$1,005,000

$462/sq ft

Public Records

Nov 7, 2016

Sold

$705,000

$324/sq ft

MLSLI #2866183

Aug 14, 2016

Pending

—

Jul 5, 2016

Listed

$333/sq ft

OneKey® MLS as Distributed by MLS Grid #L2866183

Jul 5, 2016

Listed

$725,000

$333/sq ft

Public Records

Nov 22, 2004

Sold

$670,000

$308/sq ft

Public Records

Sep 24, 2003

Sold

$590,000

$271/sq ft

** Price available after signing in.

Join or sign in to view all info

Year

Property tax

Land + Additions

Assessment*

2025

$22,090 (+10.3%)

$322 + $372

$694

2024

$20,026 (−4.4%)

$322 + $372

$694

2023

$20,944 (+0.3%)

$322 + $372

$694

2022

$20,872 (+8.0%)

$322 + $372

$694

2021

$19,332 (−8.6%)

$336 + $389

$725

2020

$21,153 (+9.5%)

$336 + $389

$725

2019

$19,323 (+6.6%)

$328 + $380

$708

2018

$18,122 (+5.9%)

$842 + $167

$1,009

2017

$17,116 (−11.3%)

$842 + $167

$1,009

2016

$19,289 (+10.7%)

$842 + $446

$1,288

2015

$17,420 (+7.9%)

$842 + $446

$1,288

2014

$16,139 (+9.3%)

$842 + $446

$1,288

2013

$14,767 (+5.2%)

$842 + $446

$1,288

2012

$14,043 (+6.0%)

$842 + $532

$1,374

2011

$13,243 (+2.2%)

$842 + $532

$1,374

2010

$12,961 (−2.6%)

$842 + $519

$1,361

2009

$13,308

$842 + $715

$1,557

Tax history for 21 Hillvale

Year

Property tax

Land + Additions

Assessment*

2025

$22,090 (+10.3%)

$322 + $372

$694

2024

$20,026 (−4.4%)

$322 + $372

$694

2023

$20,944 (+0.3%)

$322 + $372

$694

2022

$20,872 (+8.0%)

$322 + $372

$694

2021

$19,332 (−8.6%)

$336 + $389

$725

2020

$21,153 (+9.5%)

$336 + $389

$725

2019

$19,323 (+6.6%)

$328 + $380

$708

2018

$18,122 (+5.9%)

$842 + $167

$1,009

2017

$17,116 (−11.3%)

$842 + $167

$1,009

2016

$19,289 (+10.7%)

$842 + $446

$1,288

2015

$17,420 (+7.9%)

$842 + $446

$1,288

2014

$16,139 (+9.3%)

$842 + $446

$1,288

2013

$14,767 (+5.2%)

$842 + $446

$1,288

2012

$14,043 (+6.0%)

$842 + $532

$1,374

2011

$13,243 (+2.2%)

$842 + $532

$1,374

2010

$12,961 (−2.6%)

$842 + $519

$1,361

2009

$13,308

$842 + $715

$1,557

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Beds

—

Baths

2.5

Stories

Lot width

—

Lot depth

—

Lot size

7,000 Sq. Ft.

Year renovated

—

Sq. Ft.

1,788

Year built

1955

Style

Single Family Residential

County

Nassau County

APN

12504 00190

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 17, 2026.

Property details

Parking

Parking Information
Carport YN: No
Parking Total: 6

Garage Information
Garage Spaces: 2
Has Garage

Interior

Virtual Tour Information

Heating & Cooling
Cooling: Central Air
Heating: Hot Water

Interior Features
Interior Features: Breakfast Bar,Cathedral Ceiling(s),Ceiling Fan(s),Chandelier,Crown Molding,Eat-in Kitchen,Entrance Foyer,Formal Dining,High Ceilings,Open Kitchen,Primary Bathroom,Walk Through Kitchen,Walk-In Closet(s)
Appliances: Dishwasher, Disposal, Dryer, Electric Oven, Electric Range, Electric Water Heater, Exhaust Fan, Microwave, Refrigerator, Washer
Flooring: Hardwood
Levels: Multi/Split
Patio And Porch Features: Deck, Patio

Room Information
Basement YN: Yes
Attic: Full
Rooms Total: 11
Basement: Finished

Bathroom Information
Bathrooms Full: 2
Bathrooms Half: 1

Exterior

Exterior Features
Construction Materials: Brick
Fencing: Fenced
Security Features: Smoke Detector(s)
Body Type: Single Wide
Waterfront YN: No

Lot Information
Lot Features: Back Yard

Property Information
Living Area Source: Public Records
Living Area (Sq. Ft.): 2174.00
Building Area Total (Sq. Ft.): 3352.00
Building Area Source: Plans
Property Sub Type: Single Family Residence
Property Condition: Actual

Financial

Tax Information
Tax Year: 2024
Tax Source: Other
Tax Annual Amount: $19,369

Financial Information
Buyer Financing: Conventional

Utilities

Utility Information
Electric Company: PSEG
Sewer: Public Sewer
Utilities: Electricity Connected

Location

School Information
Elementary School: Baylis Elementary School
Elementary School District: Syosset
Middle Or Junior School: H B Thompson Middle School
Middle Or Junior School District: Syosset
High School: Syosset Senior High School
High School District: Syosset

Location Information
Directions: Parkway Dr To Hillvale St
County Or Parish: Nassau County

Public facts

Beds: —
Baths: 2.5
Sq. Ft.: 1,788
Stories: 1.0
Lot Size: 7,000 square feet
Style: Single Family Residential
Year Built: 1955
Year Renovated: —
County: Nassau County
APN: 12504 00190

Home facts updated by county records on Aug 17, 2026

Around this home

Schools

Baylis Elementary School

Public K-5 • Assigned • 0.5mi

7/10

H B Thompson Middle School

Public 6-8 • Assigned • 1.2mi

8/10

Syosset Senior High School

Public 9-12 • Assigned • 2.9mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

5/10 Heat Factor

7 days above 98° expected this year, 16 days in 30 years

6/10 Wind Factor

67% chance of strong winds in next 30 years

4/10 Air Factor

5 unhealthy days expected this year, 7 days in 30 years

Provided by First Street

Historical weather

Syosset, NY • 11791

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 8.7 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

8.7 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.28M – $1.55M

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New listings for sale in 11791

FOR SALE BY OWNER

$1,350,000

4 beds1 bath2,069 sq ft

4 Betty St, Syosset, NY 11791

FOR SALE BY OWNER

$1,250,000

4 beds3 baths2,354 sq ft

12 Walters Ave, Syosset, NY 11791

OPEN SAT, 1PM TO 3PM

$899,000

3 beds2.5 baths1,978 sq ft

151 The Knl, Syosset, NY 11791

Listing by Good Choice Realty & Mgmt Corp

$2,099,000

5 beds3.5 baths4,023 sq ft

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Listing by Compass Greater NY LLC

3D WALKTHROUGH

$1,499,888

4 beds2.5 baths2,736 sq ft

47 Syosset Cir, Syosset, NY 11791

Listing by Corcoran SRG Residential

$1,699,999

6 beds5 baths3,400 sq ft

6 Garden Cir, Syosset, NY 11791

Listing by BH&G R E Realty Connect

$1,100,000

3 beds2.5 baths1,658 sq ft

12 Leonard Rd, Syosset, NY 11791

Listing by HomeSmart Premier Living Rlty

Home values near 21 Hillvale

Data from public records.

Address	Redfin Estimate
20 Hillvale Rd, Syosset, NY 3 Beds \| 2.5 Baths \| - Sq. Ft.	$1,179,381
23 Hillvale Rd, Syosset, NY - Beds \| 3.5 Baths \| 2497 Sq. Ft.	$1,284,996

Address	Redfin Estimate
15 Hillvale Rd, Syosset, NY 4 Beds \| 3 Baths \| 1796 Sq. Ft.	—
11 Hillvale Rd, Syosset, NY - Beds \| 2.5 Baths \| 1801 Sq. Ft.	$1,184,939

Address	Redfin Estimate
25 Hillvale Rd, Syosset, NY 3 Beds \| 2.5 Baths \| 1789 Sq. Ft.	$1,223,916
17 Hillvale Rd, Syosset, NY - Beds \| 2.5 Baths \| 2074 Sq. Ft.	$1,303,637

Property information provided by OneKey® MLS as Distributed by MLS Grid when last listed in 2025. This data may not match . Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 11791, NY

Sale history for 21 Hillvale

Tax history for 21 Hillvale

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 11791

Home values near 21 Hillvale

More real estate resources