9 Keystone Ct is a 2,156 square foot house on a 0.33 acre lot with 3 bathrooms. - it last sold on July 23, 1984 for $113,500. Based on Redfin's Gaithersburg data, we estimate the home's value is $644,569.
Single-familyProperty Type
1974Year Built
0.33 acresLot Size
$299Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$644,569
$531K since sold in July 1984$10K since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.4% lower than the average sale price ($712K) of 4 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
R-90
Medium Density Residential District
The R-90 Zone is intended to provide for medium-density residential areas primarily with single-family detached homes.
Permitted uses
Include but are not limited to:
Religious facility
Day care facility
Housing-Single unit
Housing-Other
Public service
May 17, 2023 • Final
Residential fence - new
Install a new fence behind the property.
Grading
Oct 26, 2022 • Final
Residential fence - new
Install a new fence behind the property.
Grading
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Bathroom Information
# of Full Baths: 3
Heating & Cooling
Air Conditioning Type: Split System
Heating Type: Hot Air
Fireplace Information
# of Fireplaces: 1
Fireplace Type: 2 Story Brick
Has Fireplace
Exterior
Exterior Information
Building Construction Quality: Average
Exterior Wall: Frame Brick
Building Type: Single Family
Property Information
Living Sq. Ft: 2,156
Building Sq. Ft: 2,156
# of Stories: 2
Stories Type: 2
Legal Description: WEST RIDING
Parking & Garage Information
Parking Type: Carport
Garage/Parking Sq. Ft: 348
Garage / Carport Type: Carport
Lot Information
# of Buildings: 1
Land Sq. Ft: 14,513
Legal Lot Number: 55
Legal Block Number: C
Municipality Name: GAITHERSBURG
Acres: 0.3332
Zoning Code: R90
County Use Description: SINGLE FAMILY DETACH
State Use Description: RESIDENTIAL
Utility Information
Sewer Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax District County: 09
Public facts
Beds: —
Baths: 3.0
Sq. Ft.: 2,156
Stories: 2.0
Lot Size: 0.33 acres
Style: Single Family Residential
Year Built: 1974
Year Renovated: —
County: Montgomery County
APN: 09 01521507
Home facts updated by county records on Oct 14, 2026
Around this home
Schools
Diamond Elementary School
Public PreK-5 • Assigned • 0.3mi
9/10
Lakelands Park Middle School
Public 6-8 • Assigned • 1.4mi
6/10
Northwest High School
Public 9-12 • Assigned • 2.1mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Gaithersburg, MD, is known for its diverse community, historic landmarks like the Gaithersburg Community Museum, and modern developments like the Kentlands. It combines a rich heritage with thriving shopping, dining, and recreational options, making...
With so many different neighborhoods, Gaithersburg is consistently ranked as the #1 most diverse in the entire US!!! From the Kentlands story book design to the new urbanism of Crown Farm, there are several neighborhoods where you can live, play, and...