Google street view image for 21 Deborah Rd, Syosset, NY 11791

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Sold

$1,101,713

Est. refi paymentEst. refi $4,142/mo

—

•

2 ba

•

1,907

sq ft

21 Deborah Rd, Syosset, NY 11791

About this home

Syosset - Beautiful Expanded Cape With 4 Bedrooms. Very Spacious With Lots Of Natural Light. 2 Master Bedrooms Possible. Extended Updated Eik W/Granite Counters. Sliders To Deck. Gas Heat And Cooking, Cac, Hardwood Floors, Igs, Tandem 2 Car Garage, Perfect Location. Professionally Landscaped. Roof And Siding 3 Years Old. Syosset Schools. A Must See --, Additional information: Appearance:Mint,Separate Hotwater Heater:Yes

Single-familyProperty Type

1955Year Built

6,000 sq ftLot Size

$578Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,101,713

$488K since sold in November 2016$3,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 6.8% lower than the average sale price ($1.18M) of 6 comparable homes.

SOLD SEP 28, 2026
$1,320,000
A
3 beds2 baths1,803 sq ft
33 Birchwood Park Dr, Syosset, NY 11791
Listing by Douglas Elliman Real Estate
SOLD JUN 26, 2026
$1,110,000
B
4 beds2 baths1,870 sq ft
25 Leonard Rd, Syosset, NY 11791
Listing by Douglas Elliman Real Estate
SOLD JUL 17, 2026
$1,290,000
C
3 beds2 baths1,634 sq ft
19 Birchwood Park Dr, Syosset, NY 11791
Listing by Chase Global Realty Corp
SOLD JUL 23, 2026
$1,250,000
D
3 beds2 baths1,671 sq ft
5 Joseph Ct, Syosset, NY 11791
Listing by E Realty International Corp
SOLD JUL 21, 2026
$999,000
E
3 beds2 baths2,086 sq ft
58 Circle Dr, Syosset, NY 11791
Listing by Homes By Mara
SOLD SEP 30, 2026
$1,125,000
F
3 beds2 baths1,852 sq ft
9 Flint Ln, Jericho, NY 11753
Listing by BERKSHIRE HATHAWAY

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Earn from this home

Sell

$1,036,390

Est. take-home

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Refinance

Est. cash available

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Rent

$5,366/mo

Redfin rental estimate

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Market trends in 11791, NY

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

100.0%

+0.2% MoM

Median sale price

$1.3M

$8K MoM

Avg. days on market

24d

1 days MoM

Recently sold homes

9 MoM

New listings for sale

NEW 1 HR AGO
$1,779,999
4 beds2.5 baths2,638 sq ft
43 Pelican Ct, Syosset, NY 11791
Listing by Douglas Elliman Real Estate
OPEN SAT, 12PM TO 2PM
$1,379,999
3 beds3 baths2,402 sq ft
29 Hillside Ln, Syosset, NY 11791
Listing by BH&G R E Realty Connect
OPEN SAT, 1PM TO 3PM
$1,098,000
4 beds2 baths1,631 sq ft
20 Willets Ave, Syosset, NY 11791
Listing by Charles Rutenberg Realty Inc
OPEN SAT, 12PM TO 2PM
$899,000
3 beds2 baths1,212 sq ft
31 Garden Cir, Syosset, NY 11791
Listing by Daniel Gale Sothebys Intl Rlty
$2,250,000
3 beds4 baths5,081 sq ft
1574 Laurel Hollow Rd, Syosset, NY 11791
Listing by REO Assets America LLC
OPEN SUN, 10AM TO 12PM
$2,295,000
5 beds3 baths2,836 sq ft
135 Hickman St, Syosset, NY 11791
Listing by Douglas Elliman Real Estate
$1,288,000
5 beds4 baths2,150 sq ft
18 Park Dr E, Syosset, NY 11791
Listing by Sweet Key Realty Group Inc
$1,998,000
4 beds3.5 baths2,937 sq ft
4 Corin Ct, Syosset, NY 11791
Listing by Compass Greater NY LLC
OPEN SAT, 2PM TO 4PM
$1,899,999
4 beds4.5 baths3,100 sq ft
29 Melanie Ln, Syosset, NY 11791
Listing by ZI Realty LLC
OPEN SAT, 3:30PM TO 5PM
$1,699,000
5 beds3.5 baths3,400 sq ft
770 Cedar St, Syosset, NY 11791
Listing by ZI Realty LLC
See all

Provided by Redfin

Sale history for 21 Deborah Rd

Year

Property tax

Land + Additions

Assessment*

2025

$21,690 (+4.0%)

$294 + $388

$682

2024

$20,849 (+5.8%)

$294 + $388

$682

2023

$19,699 (+10.6%)

$294 + $388

$682

2022

$17,819 (+8.5%)

$294 + $388

$682

2021

$16,420 (−6.2%)

$311 + $411

$722

2020

$17,511 (+21.5%)

$311 + $411

$722

2019

$14,412 (+6.5%)

$303 + $400

$703

2018

$13,528 (+5.8%)

$637 + $129

$766

2017

$12,781 (−0.7%)

$637 + $129

$766

2016

$12,866 (+9.8%)

$637 + $177

$814

2015

$11,715 (+3.3%)

$637 + $311

$948

2014

$11,345 (−1.5%)

$637 + $311

$948

2013

$11,523 (−1.8%)

$796 + $389

$1,185

2012

$11,738 (+2.3%)

$821 + $401

$1,222

2011

$11,475 (+1.9%)

$796 + $389

$1,185

2010

$11,260 (−6.0%)

$821 + $392

$1,213

2009

$11,974

$755 + $634

$1,389

Tax history for 21 Deborah Rd

Year

Property tax

Land + Additions

Assessment*

2025

$21,690 (+4.0%)

$294 + $388

$682

2024

$20,849 (+5.8%)

$294 + $388

$682

2023

$19,699 (+10.6%)

$294 + $388

$682

2022

$17,819 (+8.5%)

$294 + $388

$682

2021

$16,420 (−6.2%)

$311 + $411

$722

2020

$17,511 (+21.5%)

$311 + $411

$722

2019

$14,412 (+6.5%)

$303 + $400

$703

2018

$13,528 (+5.8%)

$637 + $129

$766

2017

$12,781 (−0.7%)

$637 + $129

$766

2016

$12,866 (+9.8%)

$637 + $177

$814

2015

$11,715 (+3.3%)

$637 + $311

$948

2014

$11,345 (−1.5%)

$637 + $311

$948

2013

$11,523 (−1.8%)

$796 + $389

$1,185

2012

$11,738 (+2.3%)

$821 + $401

$1,222

2011

$11,475 (+1.9%)

$796 + $389

$1,185

2010

$11,260 (−6.0%)

$821 + $392

$1,213

2009

$11,974

$755 + $634

$1,389

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

Public record

Public record
Permits

Beds

—

Baths

Stories

1.5

Lot width

—

Lot depth

—

Lot size

6,000 Sq. Ft.

Year renovated

—

Sq. Ft.

1,907

Year built

1955

Style

Single Family Residential

County

Nassau County

APN

12422 00170

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 17, 2026.

Property details

Around this home

Schools

Robbins Lane Elementary School

Public K-5 • Assigned • 1.0mi

9/10

H B Thompson Middle School

Public 6-8 • Assigned • 1.5mi

8/10

Syosset Senior High School

Public 9-12 • Assigned • 3.1mi

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

6/10 Heat Factor

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

6/10 Wind Factor

69% 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

$1.05M – $1.27M

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Nearby similar homes

OPEN SUN, 11AM TO 2PM

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New listings for sale in 11791

NEW 1 HR AGO

$1,779,999

4 beds2.5 baths2,638 sq ft

43 Pelican Ct, Syosset, NY 11791

Listing by Douglas Elliman Real Estate

OPEN SAT, 12PM TO 2PM

$1,379,999

3 beds3 baths2,402 sq ft

29 Hillside Ln, Syosset, NY 11791

Listing by BH&G R E Realty Connect

OPEN SAT, 1PM TO 3PM

$1,098,000

4 beds2 baths1,631 sq ft

20 Willets Ave, Syosset, NY 11791

Listing by Charles Rutenberg Realty Inc

OPEN SAT, 12PM TO 2PM

$899,000

3 beds2 baths1,212 sq ft

31 Garden Cir, Syosset, NY 11791

Listing by Daniel Gale Sothebys Intl Rlty

$2,250,000

3 beds4 baths5,081 sq ft

1574 Laurel Hollow Rd, Syosset, NY 11791

Listing by REO Assets America LLC

OPEN SUN, 10AM TO 12PM

$2,295,000

5 beds3 baths2,836 sq ft

135 Hickman St, Syosset, NY 11791

Listing by Douglas Elliman Real Estate

$1,288,000

5 beds4 baths2,150 sq ft

18 Park Dr E, Syosset, NY 11791

Listing by Sweet Key Realty Group Inc

$1,998,000

4 beds3.5 baths2,937 sq ft

4 Corin Ct, Syosset, NY 11791

Listing by Compass Greater NY LLC

OPEN SAT, 2PM TO 4PM

$1,899,999

4 beds4.5 baths3,100 sq ft

29 Melanie Ln, Syosset, NY 11791

Listing by ZI Realty LLC

Home values near 21 Deborah Rd

Data from public records.

Address	Redfin Estimate
25 Deborah Rd, Syosset, NY 6 Beds \| 2.5 Baths \| - Sq. Ft.	$1,189,938
27 Deborah Rd, Syosset, NY - Beds \| 2 Baths \| 1634 Sq. Ft.	$990,367

Address	Redfin Estimate
28 Deborah Rd, Syosset, NY - Beds \| 2 Baths \| 1387 Sq. Ft.	$908,542
14 Deborah Rd, Syosset, NY - Beds \| 2.5 Baths \| 2325 Sq. Ft.	$969,919

Address	Redfin Estimate
29 Deborah Rd, Syosset, NY - Beds \| 2 Baths \| 1634 Sq. Ft.	$981,000
11 Deborah Ct, Syosset, NY - Beds \| 2.5 Baths \| 1706 Sq. Ft.	$1,071,923

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GreatSchools Ratings provided by GreatSchools.org.

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21 Deborah Rd, Syosset, NY 11791

About this home

Redfin Estimate

Earn from this home

Market trends in 11791, NY

Sale history for 21 Deborah Rd

Tax history for 21 Deborah Rd

Public record

Property details

Public facts

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 11791

Home values near 21 Deborah Rd

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