Off market dec 2017 for $445K

$815,578

Est. refi paymentEst. refi $2,982/mo

•

—

sq ft

21 Hillside Rd, Stony Brook, NY 11790

About this home

Single-familyProperty Type

1964Year Built

0.36 acresLot Size

Listing by Carol Russell • Daniel Gale Sothebys Intl Rlty

Bought with Melora Lane • Daniel Gale Sothebys Intl Rlty

Redfin checked: 2 minutes ago

•Source:OneKey® MLS as Distributed by MLS Grid #L2928198

Redfin Estimate

$815,578

$371K since sold in December 2017$5,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.4% lower than the average sale price ($853K) of 6 comparable homes.

SOLD SEP 8, 2026
$975,000
A
4 beds2.5 baths2,355 sq ft
9 Briar Path, East Setauket, NY 11733
Listing by Douglas Elliman Real Estate
SOLD SEP 10, 2026
$805,000
B
4 beds2.5 baths1,851 sq ft
20 Upper Sheep Pasture Rd, East Setauket, NY 11733
Listing by Signature Premier Properties
SOLD OCT 6, 2026
$672,500
C
4 beds2.5 baths1,736 sq ft
8 Skyview Ln, Stony Brook, NY 11790
Listing by Coldwell Banker American Homes
SOLD OCT 19, 2026
$810,000
D
3 beds2.5 baths1,711 sq ft
12 William Penn Dr, Stony Brook, NY 11790
Listing by Real Broker NY LLC
SOLD JUN 3, 2026
$991,000
E
4 beds2.5 baths3,000 sq ft
1 Cumberland Path, Setauket, NY 11733
Listing by Daniel Gale Sothebys Intl Rlty
SOLD SEP 25, 2026
$865,000
F
3 beds2 baths1,918 sq ft
48 William Penn Dr, Stony Brook, NY 11790
Listing by Coldwell Banker M&D Good Life

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Earn from this home

Sell

$476,679

Est. take-home

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Refinance

Est. cash available

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Rent

$3,375/mo

Redfin rental estimate

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Market trends in 11790, NY

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

106.9%

+0.5% MoM

Median sale price

$860K

$20K MoM

Avg. days on market

18d

2 days MoM

Recently sold homes

3 MoM

New listings for sale

NEW 3 HRS AGO
$779,000
2 beds2 baths1,574 sq ft
16 Oak Run, Stony Brook, NY 11790
Listing by H & G Realty New York
COMING SOON
$749,000
3 beds2 baths1,800 sq ft
103 Sycamore Cir, Stony Brook, NY 11790
Listing by Howard Hanna Coach
OPEN FRI, 4PM TO 6PM
$529,000
2 beds2 baths1,100 sq ft
187 Knolls Dr, Stony Brook, NY 11790
Listing by Daniel Gale Sothebys Intl Rlty
$880,000
5 beds4 baths3,272 sq ft
1147 N Country Rd, Stony Brook, NY 11790
Listing by North Star Realty Assoc LLC
$799,999
5 beds4 baths2,800 sq ft
18 University Heights Dr, Stony Brook, NY 11790
Listing by BH&G R E Realty Connect
$759,000
4 beds2.5 baths2,200 sq ft
50 Bonnie Ln, Stony Brook, NY 11790
Listing by BH&G R E Realty Connect
$749,999
3 beds2 baths1,850 sq ft
25 Stratton Ln, Stony Brook, NY 11790
Listing by BH&G R E Realty Connect
See all

Provided by Redfin

Sale history for 21 Hillside Rd

Date

Event

Price

Public Records

Jan 22, 2018

Sold

$445,000

OneKey® MLS as Distributed by MLS Grid #L2928198

Dec 6, 2017

Sold

$445,000

Oct 3, 2017

Pending

—

Jul 5, 2017

Price Changed

$459,000

Jun 6, 2017

Price Changed

$479,000

May 9, 2017

Price Changed

$499,000

Apr 10, 2017

Listed

$529,000

OneKey® MLS as Distributed by MLS Grid #L2865768

Sep 16, 2016

Listing Removed

—

Jul 13, 2016

Price Changed

$529,000

Jul 1, 2016

Listed

$579,000

Public Records

Jul 14, 1999

Sold

$275,000

Public Records

Apr 22, 1991

Sold

$155,000

Public Records

Nov 20, 1990

Sold

$252,500

Public Records

Jan 30, 1986

Sold

$189,000

Year

Property tax

Land + Additions

Assessment*

2026

$18,274

$400 + $3,515

$3,915

2025

$18,274 (+3.8%)

$400 + $3,515

$3,915

2024

$17,612 (+7.0%)

$400 + $3,515

$3,915

2023

$16,467 (+3.5%)

$400 + $3,515

$3,915

2022

$15,914

$400 + $3,515

$3,915

2021

$15,914 (+0.9%)

$400 + $3,515

$3,915

2020

$15,766 (+1.7%)

$400 + $3,515

$3,915

2019

$15,498 (+2.9%)

$400 + $3,515

$3,915

2018

$15,067 (+11.1%)

$400 + $3,515

$3,915

2017

$13,564 (+1.4%)

$400 + $3,515

$3,915

2016

$13,371 (+7.3%)

$400 + $3,515

$3,915

2015

$12,461 (+2.3%)

$400 + $3,515

$3,915

2014

$12,185 (+3.2%)

$400 + $3,515

$3,915

2013

$11,802 (−10.8%)

$400 + $3,515

$3,915

2012

$13,224 (+4.9%)

$400 + $4,045

$4,445

2011

$12,612 (+2.4%)

$400 + $4,045

$4,445

2010

$12,316 (+3.1%)

$400 + $4,045

$4,445

2009

$11,946

$400 + $4,480

$4,880

Tax history for 21 Hillside Rd

Year

Property tax

Land + Additions

Assessment*

2026

$18,274

$400 + $3,515

$3,915

2025

$18,274 (+3.8%)

$400 + $3,515

$3,915

2024

$17,612 (+7.0%)

$400 + $3,515

$3,915

2023

$16,467 (+3.5%)

$400 + $3,515

$3,915

2022

$15,914

$400 + $3,515

$3,915

2021

$15,914 (+0.9%)

$400 + $3,515

$3,915

2020

$15,766 (+1.7%)

$400 + $3,515

$3,915

2019

$15,498 (+2.9%)

$400 + $3,515

$3,915

2018

$15,067 (+11.1%)

$400 + $3,515

$3,915

2017

$13,564 (+1.4%)

$400 + $3,515

$3,915

2016

$13,371 (+7.3%)

$400 + $3,515

$3,915

2015

$12,461 (+2.3%)

$400 + $3,515

$3,915

2014

$12,185 (+3.2%)

$400 + $3,515

$3,915

2013

$11,802 (−10.8%)

$400 + $3,515

$3,915

2012

$13,224 (+4.9%)

$400 + $4,045

$4,445

2011

$12,612 (+2.4%)

$400 + $4,045

$4,445

2010

$12,316 (+3.1%)

$400 + $4,045

$4,445

2009

$11,946

$400 + $4,480

$4,880

*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

—

Stories

—

Lot width

—

Lot depth

—

Lot size

0.36 Acres

Year renovated

—

Sq. Ft.

—

Year built

—

Style

Single Family Residential

County

Suffolk County

APN

0200108000200006000

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 31, 2026.

Property details

Parking

Parking Information
Parking Features: Attached, Private

Interior

Virtual Tour Information

Fireplace Information
Fireplaces Total: 2

Heating & Cooling
Cooling: Central Air
Heating: Forced Air, Natural Gas

Interior Features
Interior Features: Eat-in Kitchen,Formal Dining
Appliances: Dishwasher, Dryer, Refrigerator, Washer
Flooring: Hardwood
Patio And Porch Features: Deck

Room Information
Basement YN: No
Attic: See Remarks
Rooms Total: 8
Basement: Full, Partially Finished
Additional Rooms: Library/Den

Bathroom Information
Bathrooms Full: 2
Bathrooms Half: 1

Exterior

Exterior Features
Construction Materials: Vinyl Siding

Property Information
Property Sub Type: Single Family Residence

Financial

Tax Information
Tax Section: 10800
Tax Annual Amount: $14,546.03

Financial Information
Buyer Financing: Conventional

Location

School Information
School District Number: 1
High School District: Three Village

Location Information
Hamlet: Stony Brook
Directions: 25A To Quaker Path, Bear Left Onto Mt. Grey Rd. Turn Right Onto Hillside Rd., House Is On Left Corner.
County Or Parish: Suffolk County

Public facts

Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: 0.36 acres
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: Suffolk County
APN: 0200108000200006000

Home facts updated by county records on Aug 31, 2026

Around this home

Schools

Setauket Elementary School

Public PreK-6 • Assigned • 1.2mi

6/10

Paul J Gelinas Junior High School

Public 7-9 • Assigned • 0.6mi

7/10

Ward Melville Senior High School

Public 9-12 • Assigned • 3.5mi

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 95° expected this year, 16 days in 30 years

8/10 Wind Factor

80% chance of strong winds in next 30 years

4/10 Air Factor

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

Provided by First Street

Historical weather

Stony Brook, NY • 11790

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 8.8 hours in June and 4.5 hours in December, which is comparable to the U.S. average for solar exposure.

8.8 hrs

4.5 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$775,000 – $938,000

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Listing by BH&G R E Realty Connect

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Listing by BH&G R E Realty Connect

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Home values near 21 Hillside Rd

Data from public records.

Address	Redfin Estimate
9 Hillside Road, Stony Brook, NY - Beds \| - Baths \| - Sq. Ft.	$653,486
23 Hillside Road, Stony Brook, NY - Beds \| - Baths \| 1836 Sq. Ft.	$820,962

Address	Redfin Estimate
19 Hillside Road, Stony Brook, NY 2 Beds \| 2 Baths \| - Sq. Ft.	$760,490
27 Hillside Road, Stony Brook, NY 6 Beds \| 3.5 Baths \| - Sq. Ft.	$1,411,670

Address	Redfin Estimate
22 Hillside Road, Stony Brook, NY 4 Beds \| 3.5 Baths \| - Sq. Ft.	$1,104,194
11 Mount Grey Road, Stony Brook, NY 3 Beds \| 2.5 Baths \| - Sq. Ft.	$912,198

Property information provided by OneKey® MLS as Distributed by MLS Grid when last listed in 2017. This data may not match . Learn more.

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About this home

Redfin Estimate

Earn from this home

Market trends in 11790, NY

Sale history for 21 Hillside Rd

Tax history for 21 Hillside Rd

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 11790

Home values near 21 Hillside Rd

More real estate resources