Google street view image for 21 Billow Rd, Old Saybrook, CT 06475

Off market apr 1996 for $142K

$786,590

Est. refi paymentEst. refi $956/mo

•

1.5 ba

•

1,663

sq ft

21 Billow Rd, Old Saybrook, CT 06475

About this home

21 Billow Rd is a 1,663 square foot house on a 3,920 square foot lot with 3 bedrooms and 1.5 bathrooms. - it last sold on April 29, 1996 for $142,500. Based on Redfin's Old Saybrook data, we estimate the home's value is $786,590.

Single-familyProperty Type

1938Year Built

3,920 sq ftLot Size

$473Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$786,590

$644K since sold in April 1996$7,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 9.1% lower than the average sale price ($866K) of 6 comparable homes.

SOLD JUN 18, 2026
$1,030,000
A
3 beds1.5 baths1,772 sq ft
37 Mohican Rd, Old Saybrook, CT 06475
SOLD OCT 22, 2026
$999,000
B
3 beds2 baths1,426 sq ft
37 Woodland Dr, Old Saybrook, CT 06475
SOLD SEP 9, 2026
$715,000
C
4 beds2 baths1,675 sq ft
14 Seagull Rd, Old Saybrook, CT 06475
SOLD SEP 15, 2026
$805,000
D
4 beds1.5 baths1,088 sq ft
27 Gates Rd, Old Saybrook, CT 06475
SOLD SEP 15, 2026
$960,000
E
4 beds1.5 baths1,208 sq ft
28 Gates Rd, Old Saybrook, CT 06475
SOLD OCT 9, 2026
$685,000
F
2 beds2 baths1,760 sq ft
25 Uncas Trl, Old Saybrook, CT 06475

Claim this home to receive a free report every month with insights on the changing estimate.

Earn from this home

Sell

$739,355

Est. take-home

List your home with Redfin and save $7,866

Refinance

Est. cash available

Get cash now or lower your monthly rate

Market trends in 06475, CT

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

99.9%

0.2% MoM

Median sale price

$715K

$20K MoM

Avg. days on market

47d

13 days MoM

Recently sold homes

2 MoM

New listings for sale

$1,750,000
4 beds2.5 baths2,618 sq ft
7 Cromwell Ct, Old Saybrook, CT 06475
$900,000
3 beds3 baths3,128 sq ft
2 Hawk Brk, Old Saybrook, CT 06475
$1,200,000
2 beds0.5 baths624 sq ft
7 Toms Rd, Old Saybrook, CT 06475
$839,000
4 beds2.5 baths3,472 sq ft
3 Town Beach Rd, Old Saybrook, CT 06475
$2,495,000
4 beds3.5 baths3,766 sq ft
514 Main St, Old Saybrook, CT 06475
See all

Provided by Redfin

Sale history for 21 Billow Rd

Year

Property tax

Land + Additions

Assessment*

2023

$6,438 (+1.9%)

$173,500 + $141,300

$314,800

2022

$6,321 (+0.1%)

$173,500 + $141,300

$314,800

2021

$6,312

$173,500 + $141,300

$314,800

2020

$6,312 (+1.5%)

$173,500 + $141,300

$314,800

2019

$6,217 (−3.0%)

$173,500 + $141,300

$314,800

2018

$6,407 (−0.3%)

$173,500 + $153,400

$326,900

2017

$6,427 (+2.1%)

$173,500 + $153,400

$326,900

2016

$6,296 (+4.1%)

$173,500 + $153,400

$326,900

2014

$6,048 (−16.6%)

$173,500 + $153,400

$326,900

2011

$7,253

$286,200 + $191,000

$477,200

Tax history for 21 Billow Rd

Year

Property tax

Land + Additions

Assessment*

2023

$6,438 (+1.9%)

$173,500 + $141,300

$314,800

2022

$6,321 (+0.1%)

$173,500 + $141,300

$314,800

2021

$6,312

$173,500 + $141,300

$314,800

2020

$6,312 (+1.5%)

$173,500 + $141,300

$314,800

2019

$6,217 (−3.0%)

$173,500 + $141,300

$314,800

2018

$6,407 (−0.3%)

$173,500 + $153,400

$326,900

2017

$6,427 (+2.1%)

$173,500 + $153,400

$326,900

2016

$6,296 (+4.1%)

$173,500 + $153,400

$326,900

2014

$6,048 (−16.6%)

$173,500 + $153,400

$326,900

2011

$7,253

$286,200 + $191,000

$477,200

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

Property details

Interior

Bathroom Information
# of Full Baths: 1
# of 1/2 Baths: 1

Heating & Cooling
Heating Type: Forced Hot Water

Room Information
# of Rooms: 5

Exterior

Exterior Information
Physical Condition: Average
Exterior Wall: Vinyl
Roof Shape Type: Gable

Property Information
Living Sq. Ft: 1,663
Gross Sq. Ft: 3,100
# of Units: 1
# of Stories: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 3,920
Municipality Name: OLD SAYBROOK
Acres: 0.09
Zoning Code: A
State Use Description: 1-FAMILY RESIDENCE

Financial

Assessor Information
Assessment Year: 2023

Public facts

Beds: 3
Baths: 1.5
Sq. Ft.: 1,663
Stories: 2.0
Lot Size: 3,920 square feet
Style: Single Family Residential
Year Built: 1938
Year Renovated: —
County: —
APN: 1022766

Home facts updated by county records on Jul 13, 2023

Around this home

Schools

K - 12
Preschool & daycare

Kathleen E. Goodwin School

Public PreK-4 • Assigned • 1.6mi

7/10

Old Saybrook Middle School

Public 5-8 • Assigned • 2.0mi

9/10

Old Saybrook Senior High School

Public 9-12 • Assigned • 1.9mi

6/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

4/10 Flood Factor

Estimated 10-16% chance 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 92° 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

Old Saybrook, CT • 06475

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 9 hours in June and 4.6 hours in December, which is comparable to the U.S. average for solar exposure.

9 hrs

4.6 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$748,000 – $905,000

Reach more buyers when you sell with Redfin. Save up to $7,866 in fees. 3 minutes to get started.

Get a free, detailed breakdown of how we calculated your estimate.

Nearby similar homes

SHORT SALE

$349,000

3 beds1 bath1,172 sq ft

513 Essex Rd, Westbrook, CT 06498

0.52 acre lot • Garage • Built 1967

$5,900,000

4 beds4 baths5,651 sq ft

12 Rocky Point Rd, Old Saybrook, CT 06475

Open floor plan • Cozy fireplace • Inviting deck

FOR SALE BY OWNER

$666,000

3 beds2 baths1,580 sq ft

15 Mill Rock Rd W, Old Saybrook, CT 06475

Major demolition • Foundation work • New septic system

$83,900

2 beds1 bath728 sq ft

33 Green Acres Park Dr, Westbrook, CT 06498

New roof • New plumbing • Covered deck

$679,000

3 beds2.5 baths2,755 sq ft

11 Kitteridge Hill Rd, Old Saybrook, CT 06475

Cul-de-sac • Hardwood floors • Formal dining room

FOR SALE BY OWNER

$560,000

4 beds2 baths1,922 sq ft

46 School Hill Ln, Westbrook, CT 06498

Raised ranch • Hardwood floors • Corian countertops

New listings for sale in 06475

$1,750,000

4 beds2.5 baths2,618 sq ft

7 Cromwell Ct, Old Saybrook, CT 06475

Custom kitchen • High-end appliances • Screened porch

$900,000

3 beds3 baths3,128 sq ft

2 Hawk Brk, Old Saybrook, CT 06475

Large living spaces • Eat-in kitchen • Cherry cabinetry

$1,200,000

2 beds0.5 baths624 sq ft

7 Toms Rd, Old Saybrook, CT 06475

Waterfront cottage • Private beach • Backyard dock

$839,000

4 beds2.5 baths3,472 sq ft

3 Town Beach Rd, Old Saybrook, CT 06475

New kitchen • New split systems • New hot water heater

$2,495,000

4 beds3.5 baths3,766 sq ft

514 Main St, Old Saybrook, CT 06475

Waterfront views • Chef's kitchen • Screened porch

Home values near 21 Billow Rd

Data from public records.

Address	Redfin Estimate
10 Billow Rd, Old Saybrook, CT 4 Beds \| 6.5 Baths \| 5852 Sq. Ft.	$3,447,041
11 Billow Rd, Old Saybrook, CT 3 Beds \| 2 Baths \| 1248 Sq. Ft.	$660,938
23 Billow Rd, Old Saybrook, CT 3 Beds \| 1.5 Baths \| 1006 Sq. Ft.	$690,581
17 Billow Rd, Old Saybrook, CT 4 Beds \| 1.5 Baths \| 1550 Sq. Ft.	$777,052
16 Uncas Rd, Old Saybrook, CT 3 Beds \| 2 Baths \| 2052 Sq. Ft.	$1,063,579
20 Uncas Rd, Old Saybrook, CT 3 Beds \| 1.5 Baths \| 1364 Sq. Ft.	$1,034,714
21 Uncas Rd, Old Saybrook, CT 3 Beds \| 2 Baths \| 1960 Sq. Ft.	$1,057,867

Address	Redfin Estimate
19 Billow Rd, Old Saybrook, CT 4 Beds \| 1 Baths \| 1512 Sq. Ft.	$647,225
7 Billow Rd, Old Saybrook, CT 4 Beds \| 2 Baths \| 1872 Sq. Ft.	$975,563
25 Billow Rd, Old Saybrook, CT 2 Beds \| 1.5 Baths \| 720 Sq. Ft.	$597,521
13 Billow Rd, Old Saybrook, CT 4 Beds \| 2 Baths \| 1464 Sq. Ft.	$919,463
14 Uncas Rd, Old Saybrook, CT 4 Beds \| 3.5 Baths \| 2100 Sq. Ft.	$1,240,974
22 Uncas Rd, Old Saybrook, CT 3 Beds \| 2 Baths \| 1878 Sq. Ft.	$987,366
19 West Shore Dr, Old Saybrook, CT 4 Beds \| 1 Baths \| 1500 Sq. Ft.	$1,269,877

Address	Redfin Estimate
15 Billow Rd, Old Saybrook, CT 5 Beds \| 2 Baths \| 1800 Sq. Ft.	$811,506
27 Billow Rd, Old Saybrook, CT 4 Beds \| 2 Baths \| 1353 Sq. Ft.	$1,231,502
26 Billow Rd, Old Saybrook, CT 3 Beds \| 1 Baths \| 1181 Sq. Ft.	$919,931
10 Uncas Rd, Old Saybrook, CT 3 Beds \| 2 Baths \| 1082 Sq. Ft.	$749,410
18 Uncas Rd, Old Saybrook, CT 4 Beds \| 2 Baths \| 1981 Sq. Ft.	$1,103,376
24 Uncas Rd, Old Saybrook, CT 3 Beds \| 1 Baths \| 1148 Sq. Ft.	$618,742
16 West Shore Dr, Old Saybrook, CT 4 Beds \| 1.5 Baths \| 1450 Sq. Ft.	$1,296,859

Download the Redfin App on the Apple App Store

Download the Redfin App from the Google Play Store

Join us

Become an Agent

Get referrals

Careers

Find homes faster

About us

Find us

Subsidiaries

Affiliated Business

Countries

United States

Canada

Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.

Do not sell or share my personal information.

REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.

Redfin Brokerage Licenses

California DRE #01521930

Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures

New Mexico Real Estate Licenses

TREC: Info About Brokerage Services, Consumer Protection Notice

All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.

If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.

REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.

GreatSchools Ratings provided by GreatSchools.org.