OFF MARKET

Off Market Feb 2014 for $532K

$835,690

Est. refi paymentEst. refi $3,342/mo

•

2,642

sq ft

12640 Knoll Rd, Mount Airy, MD 21771

About this home

A WORK OF ART! This 5 BR, 3 BA stone, Frank Lloyd Wright inspired home, built by Ernie Ausherman, blends character, art & modern features: hand-carved front door, great room w/ 13' custom walnut ceilings, walls of windows, panoramic mountain views, chef's kitchen w/ two-tone granite, remodeled baths, LL "Island Room", unique spiral staircase & murals on a secluded 5-acre lot w/ lush landscaping. Wow!

Single-familyProperty Type

1969Year Built

4.97 acresLot Size

$316Est. Price/Sq.Ft.

2 car garageParking

Listed by Cheryl Poirier • RE/MAX Results

•301-698-5005 (broker)

•sandyolson@remax.net (broker)

Bought with Marilynn Anderson • RE/MAX Realty Services

•240-403-0400 (broker)

•mark@markbutterfield.com (broker)

Redfin checked: a minute ago

•Source:BRIGHT MLS #1003696220

Redfin Estimate

$835,690

$304K since sold in February 2014$9,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 22.6% higher than the average sale price ($682K) of 6 comparable homes.

SOLD DEC 1, 2025
$480,000
A
5 beds3 baths2,431 sq ft
13330 Old Annapolis Rd, Mount Airy, MD 21771
SOLD APR 30, 2026
$910,000
B
4 beds2.5 baths3,128 sq ft
12834 Jesse Smith Rd, Mount Airy, MD 21771
SOLD MAY 29, 2026
$555,000
C
4 beds3 baths2,300 sq ft
5010 Lee Hill Cir, Monrovia, MD 21770
SOLD AUG 19, 2026
$855,000
D
4 beds2.5 baths3,457 sq ft
6501 Green Valley Rd, New Market, MD 21774
SOLD JUL 10, 2026
$535,000
E
3 beds3 baths2,650 sq ft
5601-C Woodville Rd, Mt Airy, MD 21771
SOLD AUG 3, 2026
$755,000
F
4 beds3 baths3,564 sq ft
13457 Old Annapolis, Mount Airy, MD 21771

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Earn from this home

Sell

$480,637

Est. take-home

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Refinance

Est. cash available

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Rent

$3,422/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 12640 Knoll Rd

Date

Event

Price

MRIS #FR8180799

Feb 18, 2014

Delisted

—

Feb 15, 2014

Sold

$532,000

$201/sq ft

Dec 11, 2013

Pending

—

Sep 12, 2013

Listed

$204/sq ft

+25

BRIGHT MLS #1003696220

Feb 15, 2014

Sold

$532,000

$201/sq ft

Dec 11, 2013

Listing Removed

—

Sep 12, 2013

Listed

$539,000

$204/sq ft

Public Records

Dec 7, 2007

Sold

$505,000

$191/sq ft

MRIS #FR6207521

Oct 7, 2007

Delisted

—

Oct 4, 2006

Listed

$197/sq ft

MRIS #FR5386713

Nov 12, 2005

Delisted

—

Sep 15, 2005

Listed

** Price available after signing in.

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Year

Property tax

Land + Additions

Assessment*

2025

$7,878 (+6.5%)

2024

$7,395 (+10.7%)

2023

$6,681 (+6.7%)

$180,700 + $417,800

$598,500

2022

$6,262 (+6.2%)

2021

$5,896 (+2.5%)

2020

$5,754 (+1.6%)

$138,700 + $351,700

$490,400

2019

$5,664 (+0.7%)

2018

$5,624 (+1.6%)

$138,700 + $328,500

$467,200

2017

$5,533 (+0.6%)

2015

$5,498 (−0.3%)

$138,700 + $317,800

$456,500

2014

$5,516 (−8.3%)

2013

$6,014 (+0.5%)

2012

$5,984

2011

$5,984

2010

$5,984 (+11.4%)

2009

$5,370

Tax history for 12640 Knoll Rd

Year

Property tax

Land + Additions

Assessment*

2025

$7,878 (+6.5%)

2024

$7,395 (+10.7%)

2023

$6,681 (+6.7%)

$180,700 + $417,800

$598,500

2022

$6,262 (+6.2%)

2021

$5,896 (+2.5%)

2020

$5,754 (+1.6%)

$138,700 + $351,700

$490,400

2019

$5,664 (+0.7%)

2018

$5,624 (+1.6%)

$138,700 + $328,500

$467,200

2017

$5,533 (+0.6%)

2015

$5,498 (−0.3%)

$138,700 + $317,800

$456,500

2014

$5,516 (−8.3%)

2013

$6,014 (+0.5%)

2012

$5,984

2011

$5,984

2010

$5,984 (+11.4%)

2009

$5,370

*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

2.5

Stories

Lot width

—

Lot depth

—

Lot size

4.97 Acres

Year renovated

—

Sq. Ft.

3,507

Year built

1969

Style

Single Family Residential

County

Frederick County

APN

09 232818

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 Total Garage and Parking Spaces: 2
Has Garage
# of Garage Spaces: 2
Garage
Attached Garage, Detached Garage

Interior

Virtual Tour

Bedroom Information
# of Bedrooms On Main Level: 3
# of Bedrooms On 1st Lower Level: 2

Bathroom Information
# of Bathrooms (Full) On Main Level: 2
# of Bathrooms (Full) On 1st Lower Level: 1
# of Bathrooms (Full): 3

Interior Information
Appliances: Washer/Dryer Hookups Only, Dishwasher, Disposal, Dryer, Microwave, Oven/Range - Electric, Water Conditioner - Owned, Washer, Refrigerator
Entry Location: Foyer
Interior Features: Combination Kitchen/Dining, Kitchen - Gourmet, Kitchen - Eat-In, Kitchen - Island, Built-Ins, Entry Level Bedroom, Upgraded Countertops, Master Bath(s), Window Treatments, Wet/Dry Bar, Wood Floors, Floor Plan - Open
Living Area Sq.Ft. Source: Estimated

Fireplace Information
Has Fireplace
# of Fireplaces: 2
Fireplace - Glass Doors (N)

Basement Information
Basement: Yes
Connecting Stairway, Outside Entrance, Improved, Fully Finished

Exterior

Property Information
Irrigation Water Rights
Improvement Assessed Value: $317,800
Ownership Interest: Fee Simple
Property Condition: Very Good
Year Built Source: Estimated

Building Information
Builder Name: ERNIE AUSHERMAN
Construction Materials: Stone
Main Entrance Orientation: South
Other Structures: Above Grade
Outdoor Living Structures: Patio(s)
Roof: Asphalt
Structure Type: Detached

Exterior Information
Fencing: Rear

Lot Information
Lot Features: Premium, Private, Secluded, Partly Wooded
Tidal Water: No

Land Information
Land Assessed Value: $138,700

Above Grade Information
Finished Sq.Ft.: 2,642
Finished Sq.Ft. Source: Estimated

Financial

Tax Information
County Tax: $5,227.42
Tax Assessed Value: $456,500
Tax Year: 2012
Tax Annual Amount: $5,865.89

Assessments Information
Special Assessment Payment: Annually
Year Assessed: 2013

Utilities

Utilities Information
Central Air
Cooling Type: Central A/C
Cooling Fuel: Electric
Baseboard, Heat Pump(s)
Heating Fuel: Electric
Hot Water: Electric
Sewer Septic: Septic Exists
Water Source: Well

Location

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

Location Information
Directions: From Rt 70 take exit for Rt 75 toward Libertytown. Turn right onto MD-144. Turn left onto Detrick Rd. Turn right onto Knoll Rd. House is on the left.

Public facts

Beds: —
Baths: 2.5
Sq. Ft.: 3,507
Stories: 1.0
Lot Size: 4.97 acres
Style: Single Family Residential
Year Built: 1969
Year Renovated: —
County: Frederick County
APN: 09 232818

Home facts updated by county records on Jul 17, 2026

Around this home

Schools

New Market Elementary School

Public PreK-5 • Assigned • 2.9mi

10/10

New Market Middle School

Public 6-8 • Assigned • 3.0mi

7/10

Linganore High School

Public 9-12 • Assigned • 2.6mi

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

7% 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

$794,000 – $962,000

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New listings for sale in 21771

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

Home values near 12640 Knoll Rd

Data from public records.

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

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

Address	Redfin Estimate
12730 Knoll Road, Mount Airy, MD 4 Beds \| 2.5 Baths \| 2160 Sq. Ft.	$674,040
12605 Knoll Road, Mount Airy, MD 4 Beds \| 3.5 Baths \| 3214 Sq. Ft.	$1,022,002

Property information provided by BRIGHT MLS when last listed in 2013. 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 12640 Knoll Rd

Tax history for 12640 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 12640 Knoll Rd

More real estate resources