OFF MARKET

Off Market Sep 2015 for $622K

$981,278

Est. refi paymentEst. refi $4,717/mo

•

3,857

sq ft

12650 Knoll Rd, Mount Airy, MD 21771

About this home

Stunning contemporary home on 8.18 acres of picturesque land! Enjoy upgrades throughout including granite counters, fixtures, SS appls, carpet, bamboo flooring & more! Soaring vaulted ceilings & walls of windows create bright & airy living spaces. The outdoor oasis is complete with a heated in ground pool, 3 stall pole barn, play area, deck, tennis courts & more! Tax Records are incorrect

Single-familyProperty Type

1986Year Built

8.18 acresLot Size

$254Est. Price/Sq.Ft.

3 car garageParking

Listed by Creig Northrop • Long & Foster Real Estate, Inc.

•410-531-0321 (broker)

Listed by Cindy Delzoppo • Long & Foster Real Estate, Inc.

•410-531-0321 (broker)

Bought with • Ultra Real Estate

•703-759-2600 (broker)

•suzannef53@verizon.net (broker)

Redfin checked: a minute ago

•Source:BRIGHT MLS #1003681763

Redfin Estimate

$981,278

$359K since sold in September 2015$26K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 22.6% higher than the average sale price ($800K) of 6 comparable homes.

SOLD FEB 17, 2026
$827,500
A
4 beds4.5 baths3,154 sq ft
12407 Hill Ct, Mount Airy, MD 21771
SOLD AUG 3, 2026
$755,000
B
4 beds3 baths3,564 sq ft
13457 Old Annapolis, Mount Airy, MD 21771
SOLD JUL 6, 2026
$808,000
C
6 beds5 baths3,471 sq ft
13789 Blythedale, Mount Airy, MD 21771
SOLD APR 30, 2026
$910,000
D
4 beds2.5 baths3,128 sq ft
12834 Jesse Smith Rd, Mount Airy, MD 21771
SOLD JUL 24, 2026
$645,000
E
4 beds4 baths3,033 sq ft
5004 Lee Hill Cir, Monrovia, MD 21770
SOLD AUG 19, 2026
$855,000
F
4 beds2.5 baths3,457 sq ft
6501 Green Valley Rd, New Market, MD 21774

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Earn from this home

Sell

$545,868

Est. take-home

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Refinance

Est. cash available

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Rent

$4,025/mo

Redfin rental estimate

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Market trends in 21771, MD

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

100.2%

1.3% MoM

Median sale price

$677K

$8K MoM

Avg. days on market

28d

3 days MoM

Recently sold homes

101

9 MoM

New listings for sale

OPEN SAT, 3PM TO 5PM
$675,000
5 beds3 baths1,990 sq ft
692 Ridge, Mount Airy, MD 21771
(240) 403-0400
$494,000
3 beds2.5 baths1,575 sq ft
713 Merry Go Round Way, Mount Airy, MD 21771
(240) 815-9040
COMING SOON
$525,000
3 beds2 baths1,344 sq ft
4404 Buffalo Rd, Mount Airy, MD 21771
(301) 831-5600
COMING SOON
$574,900
4 beds3.5 baths1,946 sq ft
14116 Peddicord Rd, Mount Airy, MD 21771
(240) 309-6000
OPEN FRI, 4:30PM TO 7PM
$699,900
4 beds3.5 baths3,236 sq ft
1204 Longbow Rd, Mount Airy, MD 21771
(301) 882-8710
3D WALKTHROUGH
$1,450,000
7 beds4 baths4,488 sq ft
2545 Mullinix Mill Rd, Mt Airy, MD 21771
(240) 309-6000
SHORT SALE
$299,900
2 beds1 bath1,302 sq ft
28940 Ridge, Mount Airy, MD 21771
(410) 823-0033
$885,000
4 beds6 baths2,616 sq ft
1031 Saint Michaels Rd, Mount Airy, MD 21771
(877) 366-2213
3D WALKTHROUGH
$574,900
4 beds3 baths1,720 sq ft
5350 Pommel Dr, Mount Airy, MD 21771
(833) 335-7433
COMING SOON
$424,900
2 beds2 baths1,468 sq ft
4 Donalds Ln, Mount Airy, MD 21771
(301) 831-5099
See all

Provided by Redfin

Sale history for 12650 Knoll Rd

** Price available after signing in.

Year

Property tax

Land + Additions

Assessment*

2025

$8,119 (+5.2%)

2024

$7,720 (+9.4%)

2023

$7,058 (+5.1%)

$194,000 + $459,800

$653,800

2022

$6,718 (+4.2%)

2021

$6,450 (+2.5%)

2020

$6,291 (+1.7%)

$150,400 + $387,300

$537,700

2019

$6,188 (+0.8%)

2018

$6,140 (+1.7%)

$150,400 + $360,900

$511,300

2017

$6,037 (−14.6%)

2015

$7,069 (+0.4%)

$295,000 + $348,200

$643,200

2014

$7,042 (−20.4%)

2013

$8,845 (+3.0%)

2012

$8,591 (+2.5%)

2011

$8,377

2010

$8,377 (+18.3%)

2009

$7,082

Tax history for 12650 Knoll Rd

Year

Property tax

Land + Additions

Assessment*

2025

$8,119 (+5.2%)

2024

$7,720 (+9.4%)

2023

$7,058 (+5.1%)

$194,000 + $459,800

$653,800

2022

$6,718 (+4.2%)

2021

$6,450 (+2.5%)

2020

$6,291 (+1.7%)

$150,400 + $387,300

$537,700

2019

$6,188 (+0.8%)

2018

$6,140 (+1.7%)

$150,400 + $360,900

$511,300

2017

$6,037 (−14.6%)

2015

$7,069 (+0.4%)

$295,000 + $348,200

$643,200

2014

$7,042 (−20.4%)

2013

$8,845 (+3.0%)

2012

$8,591 (+2.5%)

2011

$8,377

2010

$8,377 (+18.3%)

2009

$7,082

*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
Zoning

Beds

—

Baths

Stories

1.5

Lot width

—

Lot depth

—

Lot size

8.26 Acres

Year renovated

—

Sq. Ft.

3,857

Year built

1986

Style

Single Family Residential

County

Frederick County

APN

09 223002

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 17, 2026.

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

Parking

Parking Information
# of Attached Garage Spaces: 3
Garage Features: Garage Door Opener, Garage - Front Entry
# of Total Garage and Parking Spaces: 3
Has Garage
# of Garage Spaces: 3
Garage
Attached Garage

Interior

Virtual Tour

Bedroom Information
# of Bedrooms On 1st Upper Level: 3
# of Bedrooms On Main Level: 1
# of Bedrooms On 1st Lower Level: 1

Bathroom Information
# of Bathrooms (Full) On 1st Upper Level: 2
# of Bathrooms (Half) On Main Level: 1
# of Bathrooms (Full) On Main Level: 1
# of Bathrooms (Full) On 1st Lower Level: 1
# of Bathrooms (Half): 1
# of Bathrooms (Full): 4

Interior Information
Appliances: Washer/Dryer Hookups Only, Dishwasher, Disposal, Microwave, Dryer, Washer, Humidifier, Icemaker, Stove
Door Features: Atrium, French, Six Panel, Sliding Glass, Storm
Entry Location: Living Room
Interior Features: Family Room Off Kitchen, Breakfast Area, Kitchen - Table Space, Dining Area, Kitchen - Eat-In, Master Bath(s), Built-Ins, Chair Railings, Window Treatments, Wood Floors, Floor Plan - Open
Living Area Sq.Ft. Source: Estimated
Wall & Ceiling Types: 2 Story Ceilings, 9'+ Ceilings, Vaulted Ceilings

Room Information
Dining Room, Master Bedroom, Bedroom 2, Bedroom 3, Bedroom 4, Bedroom 5, Kitchen, Game Room, Family Room, Great Room

Fireplace Information
Has Fireplace
# of Fireplaces: 1
Flue for Stove

Basement Information
Basement: Yes
Outside Entrance, Side Entrance, Sump Pump, Daylight, Full, Fully Finished, Heated, Improved, Walkout Level, Space For Rooms

Exterior

Property Information
Total Below Grade Sq. Ft.: 1000
Accessibility Features: Other
Horse Amenities: Horses Allowed
Improvement Assessed Value: $348,200
Ownership Interest: Fee Simple
Property Condition: Very Good
Year Built Source: Estimated
Year Major Reno/Remodel: 2014

Building Information
Building Sites: 1
Construction Materials: Cedar
Other Structures: Above Grade, Below Grade
Outdoor Living Structures: Balcony, Deck(s)
Structure Type: Detached
Window Features: Atrium, Vinyl Clad, Double Pane, Screens, Skylights, Wood Frame
Other Structures: Shed

Exterior Information
Extensive Hardscape, Play Area, Secure Storage

Pool Information
Personal Pool
Private Pool

Lot Information
Lot Features: Backs to Trees, Landscaping, Trees/Wooded, Secluded, Private
Tidal Water: No

Land Information
Land Assessed Value: $295,000

Above Grade Information
Finished Sq.Ft.: 2,857
Finished Sq.Ft. Source: Estimated

Below Grade Information
Finished Sq.Ft.: 1,000
Finished Sq.Ft. Source: Estimated

Financial

Tax Information
County Tax: $7,538.30
Tax Assessed Value: $643,200
Tax Year: 2014
Tax Annual Amount: $7,538.30

Assessments Information
Year Assessed: 2015

Utilities

Utilities Information
Central Air
Cooling Type: Ceiling Fan(s), Central A/C, Whole House Fan
Cooling Fuel: Electric
Heat Pump(s), Programmable Thermostat
Heating Fuel: Electric, Oil
Hot Water: Electric
Sewer Septic: Septic Exists
Water Source: Well

Location

School Information
Elementary School: NEW MARKET
Middle Or Junior School: NEW MARKET
High School: LINGANORE
School District Name: FREDERICK COUNTY PUBLIC SCHOOLS

Location Information
Directions: Take MD-75 toward Libertytown; Turn right onto Green Valley Road; Turn right onto Old National Pike; Turn left onto Detrick Road; Turn Right onto Knoll Road!

Public facts

Beds: —
Baths: 3.0
Sq. Ft.: 3,857
Stories: 1.5
Lot Size: 8.26 acres
Style: Single Family Residential
Year Built: 1986
Year Renovated: —
County: Frederick County
APN: 09 223002

Home facts updated by county records on Jul 17, 2026

Around this home

Schools

New Market Elementary School

Public PreK-5 • Assigned • 3.0mi

10/10

New Market Middle School

Public 6-8 • Assigned • 3.1mi

7/10

Linganore High School

Public 9-12 • Assigned • 2.7mi

8/10

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

Mount Airy, MD • 21771

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

$933,000 – $1.13M

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New listings for sale in 21771

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COMING SOON

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14116 Peddicord Rd, Mount Airy, MD 21771

(240) 309-6000

OPEN FRI, 4:30PM TO 7PM3D WALKTHROUGH

$699,900

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1204 Longbow Rd, Mount Airy, MD 21771

(301) 882-8710

3D WALKTHROUGH

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(240) 309-6000

SHORT SALE

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28940 Ridge, Mount Airy, MD 21771

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3D WALKTHROUGH

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5350 Pommel Dr, Mount Airy, MD 21771

(833) 335-7433

Home values near 12650 Knoll Rd

Data from public records.

Address	Redfin Estimate
12713 Knoll Rd, Mount Airy, MD - Beds \| 3 Baths \| 2932 Sq. Ft.	$725,470
12602 Knoll Rd, Mount Airy, MD - Beds \| 3.5 Baths \| 3862 Sq. Ft.	$883,301

Address	Redfin Estimate
12701 Knoll Rd, Mount Airy, MD 4 Beds \| 3.5 Baths \| 2418 Sq. Ft.	$880,000
12639 Knoll Rd, Mount Airy, MD 4 Beds \| 4.5 Baths \| 4326 Sq. Ft.	$817,901

Address	Redfin Estimate
12730 Knoll Rd, Mount Airy, MD 4 Beds \| 2.5 Baths \| 2160 Sq. Ft.	$674,040
12625 Knoll Rd, Mount Airy, MD - Beds \| 3.5 Baths \| 3619 Sq. Ft.	$881,180

Property information provided by BRIGHT MLS when last listed in 2015. This data may not match . Learn more.

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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 21771, MD

Sale history for 12650 Knoll Rd

Tax history for 12650 Knoll Rd

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 21771

Home values near 12650 Knoll Rd

More real estate resources