Google street view image for 9839 Longs Mill Rd, Rocky Ridge, MD 21778

Off market

$244,690

—

•

1 ba

•

1,200

sq ft

9839 Longs Mill Rd, Rocky Ridge, MD 21778

About this home

9839 Longs Mill Rd is a 1,200 square foot house on a 1.16 acre lot with 1 bathroom. Based on Redfin's Rocky Ridge data, we estimate the home's value is $244,690.

Single-familyProperty Type

1920Year Built

1.16 acresLot Size

$204Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$244,690

$9,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 26.4% lower than the average sale price ($332K) of 6 comparable homes.

SOLD MAY 7, 2026
$159,000
A
2 beds1 bath1,428 sq ft
1981 Keysville Rd S, Keymar, MD 21757
SOLD AUG 10, 2026
$339,000
B
3 beds1 bath986 sq ft
8128 Apples Church Rd, Thurmont, MD 21788
SOLD JUN 26, 2026
$337,000
C
3 beds2 baths1,316 sq ft
7220 Middleburg Rd, Keymar, MD 21757
SOLD MAR 13, 2026
$310,000
D
3 beds1 bath1,120 sq ft
9320 Rocky Ridge Rd, Rocky Ridge, MD 21778
SOLD JUL 24, 2026
$390,000
E
3 beds1.5 baths1,426 sq ft
12138 Keymar Rd, Keymar, MD 21757
SOLD MAY 29, 2026
$459,900
F
3 beds2 baths1,542 sq ft
11818 Cash Smith Rd, Keymar, MD 21757

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Earn from this home

Sell

$228,560

Est. take-home

List your home with Redfin and save $2,447

Market trends in 21778, MD

Last updated September 2026

Sale-to-List Price

98.5%

1.5% MoM

Median sale price

$398K

$43K MoM

Avg. days on market

98d

65 days MoM

Recently sold homes

1 MoM

Provided by Redfin

Sale history for 9839 Longs Mill Rd

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2026

$2,455 (+5.2%)

$76,800 + $141,900

$218,700

2025

$2,334 (+5.1%)

$76,800 + $141,900

$218,700

2024

$2,221 (+9.2%)

2023

$2,033 (+1.0%)

2022

$2,013 (+0.2%)

$76,800 + $85,500

$162,300

2021

$2,010 (+1.9%)

2020

$1,973 (+4.2%)

2019

$1,893 (+3.6%)

$76,800 + $80,300

$157,100

2018

$1,828 (+5.5%)

2017

$1,733 (−1.8%)

$76,800 + $59,700

$136,500

2015

$1,765 (+3.1%)

$80,800 + $57,200

$138,000

2014

$1,712 (+3.1%)

2013

$1,660 (−0.6%)

2012

$1,670 (+4.4%)

2011

$1,600

2010

$1,600 (+44.8%)

2009

$1,105

Tax history for 9839 Longs Mill Rd

Year

Property tax

Land + Additions

Assessment*

2026

$2,455 (+5.2%)

$76,800 + $141,900

$218,700

2025

$2,334 (+5.1%)

$76,800 + $141,900

$218,700

2024

$2,221 (+9.2%)

2023

$2,033 (+1.0%)

2022

$2,013 (+0.2%)

$76,800 + $85,500

$162,300

2021

$2,010 (+1.9%)

2020

$1,973 (+4.2%)

2019

$1,893 (+3.6%)

$76,800 + $80,300

$157,100

2018

$1,828 (+5.5%)

2017

$1,733 (−1.8%)

$76,800 + $59,700

$136,500

2015

$1,765 (+3.1%)

$80,800 + $57,200

$138,000

2014

$1,712 (+3.1%)

2013

$1,660 (−0.6%)

2012

$1,670 (+4.4%)

2011

$1,600

2010

$1,600 (+44.8%)

2009

$1,105

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

Zoning

Residential District 1

The purpose of the residential density districts is to promote healthful and convenient distribution of population with sufficient densities to maintain a high standard of physical design and community service. Residential density districts will conform to the County Comprehensive Plan and will be located within areas identified for residential development. The districts, as a group, are intended to provide for a variety of dwelling types and densities and to offer housing choices at various economic levels. It is further the intent to establish various densities of residential developments in order to efficiently and effectively provide for necessary public services and facilities. The following residential density districts and maximum densities are hereby established.

Permitted uses

Include but are not limited to:

Agriculture
Housing-Group
Housing-Single unit
Housing-Multiple units

Property details

Interior

Bathroom Information
# of Full Baths: 1

Heating & Cooling
Heating Type: Hot Air

Fireplace Information
# of Fireplaces: 1
Fireplace Type: 2 Story Brick
Has Fireplace

Exterior

Exterior Information
Building Construction Quality: Fair
Exterior Wall: Frame
Roof Shape Type: Metal
Building Type: Single Family

Property Information
Living Sq. Ft: 1,200
Building Sq. Ft: 1,200
# of Stories: 2
Stories Type: 2 Story With Basement
Legal Description: LT 1.16 AC E/S LONGS MILL RD. S/RT. 77

Lot Information
# of Buildings: 1
Land Sq. Ft: 50,530
Acres: 1.16
Zoning Code: R1
State Use Description: RESIDENTIAL

Utility Information
Sewer Type: Private

Financial

Assessor Information
Assessment Year: 2026
Tax District County: 04

Public facts

Beds: —
Baths: 1.0
Sq. Ft.: 1,200
Stories: 2.0
Lot Size: 1.16 acres
Style: Single Family Residential
Year Built: 1920
Year Renovated: —
County: Frederick County
APN: 04 155084

Home facts updated by county records on Sep 24, 2026

Around this home

Schools

Thurmont Primary School

Public PreK-2 • Assigned • 4.0mi

Thurmont Middle School

Public 6-8 • Assigned • 4.9mi

5/10

Catoctin High School

Public 9-12 • Assigned • 5.6mi

6/10

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

3/10 Fire Factor

0.15% chance of being in a wildfire in next 30 years

5/10 Heat Factor

7 days above 102° expected this year, 15 days in 30 years

4/10 Wind Factor

8% chance of strong winds in next 30 years

2/10 Air Factor

1 unhealthy days expected this year, 2 days in 30 years

Provided by First Street

Historical weather

Rocky Ridge, MD • 21778

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 9.2 hours in June and 4 hours in December, placing it below the U.S. average for solar exposure.

9.2 hrs

4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$233,000 – $282,000

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Nearby similar homes

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Land— sq ft

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3 beds2 baths2,122 sq ft

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Home values near 9839 Longs Mill Rd

Data from public records.

Address	Redfin Estimate
10040 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1 Baths \| 1885 Sq. Ft.	$428,017
10056 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1 Baths \| 1704 Sq. Ft.	$278,225

Address	Redfin Estimate
9716 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1.5 Baths \| 2036 Sq. Ft.	$647,813
10020 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1 Baths \| 1104 Sq. Ft.	$285,923

Address	Redfin Estimate
9911 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1.5 Baths \| 2603 Sq. Ft.	$507,712
10026 Longs Mill Rd, Rocky Ridge, MD - Beds \| 1 Baths \| 1428 Sq. Ft.	$322,805

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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 21778, MD

Sale history for 9839 Longs Mill Rd

Tax history for 9839 Longs Mill Rd

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

Home values near 9839 Longs Mill Rd

More real estate resources