For sale

$1,750,000

Est. $12,064/mo

•

3 ba

•

2,934

sq ft

21 Colonial Rd, Old Bethpage, NY 11804

About this home

2015Year Built

$596Price/Sq.Ft.

Source:FSBO.com#cmvg5nbz801uis6018fg4ad60

Payment calculator

$12,064 per month

Principal and interest$9,550

Property taxes

$2,178

HOA dues

Home insurance

$335

Utilities

Add

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Around this home

Schools

K - 12
Preschool & daycare

Old Bethpage School

Public K-4 • Assigned • 0.9mi

7/10

H B Mattlin Middle School

Public 5-8 • Assigned • 1.0mi

8/10

Plainview Old Bethpage JFK High School

Public 9-12 • Assigned • 1.2mi

9/10

Provided by GreatSchools

About Oyster

Bay

Oyster Bay, located between Cold Spring Harbor and Bayville, is a waterfront and historic Glen Cove neighborhood with a working harbor and leafy, estate-era streetscapes. The neighborhood’s character concentrates around Audrey Avenue at Spring Street, where coffee counters, independent boutiques, and old-school storefronts set a walkable, small-town cadence. The Oyster Bay Railroad Museum, the Oyster Bay Historical Society’s Earle-Wightman House, and the Planting Fields Arboretum State Historic Park act as cultural anchors. Shingle-style homes and classic Colonials mix with village-era cottages near the shore. Waterfront paths and marinas frame daily routines with salt-air views. Beaches and preserves shape the landscape from cove to bluff.

Provided by Walk Score and Local Logic

Market insights

21 Colonial Rd · $1,750,000

DAYS ON MARKET

The average home goes pending in 30 days.

SALE-TO-LIST

Most homes are selling 1% above list price.

LIST PRICE

Median sale price in this area is $858,225. (51% lower than this home)

PRICE DROP

17% of homes in this area have had a price drop in the past month.

Property details

Sale and tax history for 21 Colonial Rd

Sale History
Tax History

Date

Event

Price

FSBO.com #cmvg5nbz801uis6018fg4ad60

Oct 20, 2026

Listed

$1,750,000

$596/sq ft

Public Records

Sep 14, 2017

Sold

$940,000

$320/sq ft

OneKey® MLS as Distributed by MLS Grid #L2932114

Apr 24, 2017

Listed

$965,000

$329/sq ft

Public Records

Aug 9, 2016

Sold

$895,000

$305/sq ft

OneKey® MLS as Distributed by MLS Grid #L2818539

May 13, 2016

Listing Removed

—

Apr 14, 2016

Price Changed

$929,000

$317/sq ft

Apr 2, 2016

Price Changed

$939,000

$320/sq ft

Jan 2, 2016

Listed

$949,000

$323/sq ft

OneKey® MLS as Distributed by MLS Grid #L2852309

Jan 1, 2016

Listed

$899,000

$306/sq ft

OneKey® MLS as Distributed by MLS Grid #L2772052

Dec 31, 2015

Listing Removed

—

Jun 12, 2015

Listed

$949,000

$323/sq ft

Public Records

Jan 5, 2015

Sold

$330,000

$112/sq ft

Public Records

Jun 1, 1974

Sold

$43,000

$15/sq ft

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Year

Property tax

Land + Additions

Assessment*

2025

$26,136 (+1.5%)

$275 + $617

$892

2024

$25,751 (+2.9%)

$275 + $617

$892

2023

$25,013 (+4.2%)

$275 + $617

$892

2022

$23,999 (+3.1%)

$275 + $617

$892

2021

$23,271 (+3.2%)

$284 + $636

$920

2020

$22,554 (−6.0%)

$284 + $636

$920

2019

$23,990 (−18.8%)

$273 + $667

$940

2018

$29,557 (+22.1%)

$801 + $847

$1,648

2017

$24,214 (+66.8%)

$801 + $847

$1,648

2016

$14,520 (+24.1%)

$801 + $865

$1,666

2015

$11,701 (+6.8%)

$801

2014

$10,956 (+8.6%)

$801

2013

$10,091 (+7.7%)

$801

2012

$9,368 (+8.8%)

$801 + $110

$911

2011

$8,611 (−3.2%)

$801 + $110

$911

2010

$8,897 (−3.8%)

$801

2009

$9,249

$801 + $291

$1,092

Public record

Beds

—

Baths

Stories

Lot width

—

Lot depth

—

Lot size

7,128 Sq. Ft.

Year renovated

—

Finished Sq. Ft.

2,934

Unfinished Sq. Ft.

—

Total Sq. Ft.

2,934

Year built

2015

Style

Single Family Residential

County

Nassau County

APN

47089 00030

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 17, 2026.

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

6/10 Wind Factor

61% 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

Old Bethpage, NY • 11804

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

82/ 100

Very good sunlight

Sunscore

There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8.8 hrs

5.5 hrs

JuneDecember

Provided by Shadowmap

Redfin Estimate for 21 Colonial Rd

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