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21 Keystone Drive Gaithersburg, MD $ 900,000
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$ 900,000 Get more info
21 Keystone Drive
$ 900,000
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Open House 10/11 2pm - 3:30pm
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21 Keystone Drive

Gaithersburg, MD, 20878
$ 900,000
Bedrooms5 Baths4.1 Sq 2,930

Monthly Estimate*

$ 5,683

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Single Family Home for sale in Gaithersburg, MD

for $900,000 with 5 bedrooms and 4 full baths, 1 half bath. This 2,930 square foot home was built in 1974 on a lot size of 0.22.

Welcome to this beautifully updated Gaithersburg home, ideally located near Seneca Creek State Park and Clopper Lake, Rio, and Downtown Crown, with convenient access to shopping, dining, recreation, and major commuter routes. Extensive improvements completed in 2019 include replacement of the plumbing, electrical updates, a new HVAC system, driveway, roof with new plywood and shingles, and exterior walls upgraded with new plywood, siding, and trim. All bathrooms were fully renovated in 2019. Gas line was installed in 2019 that connects water heater, stove and back yard grill. The outdoor spaces are designed for everyday enjoyment, featuring backyard stonework and a porch completed in 2019. A storage structure was added in 2022, along with artificial turf and fencing. The basement offers additional possibilities, with rough ins behind the wall for a future wet bar and laundry area. The water heater will be replaced. A move-in-ready home with significant updates in a prime Gaithersburg location!

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Open House

10/11/2026 2:00 PM - 3:30 PM
21 Keystone Drive Gaithersburg, MD
* Some states or local ordinances may prohibit Open Houses at this time, please confirm with your Weichert agent or local rep to confirm
Single Family Active

Price

$ 900,000

Bedrooms

5

Full Bath

4

Half Bath

1

Property Type

Single Family

Taxes

$ 8,916

Style

Colonial

Lot Size

0.22

Year Built

1974

Town/City

Gaithersburg

County/Region

Montgomery

MLS | Web ID

MDMC2258154
Features
General
Living Area 2930
Sewer Public Sewer
Heating Central
Cooling Other
Possession Settlement
Roof Architectural Shingle
Appliances Built-In Microwave Dishwasher Disposal
Zoning R90
Garage Spaces 1.00
Patio/Porch Features Porch(es) Patio(s) Terrace
Architectural Style Colonial
Construction Materials Frame
School District MONTGOMERY COUNTY PUBLIC SCHOOLS
Year Built 1974
Levels 3
Tax Year 2026
Ownership Fee Simple
Cool Fuel Electric
Accessibility None
County MONTGOMERY
New Construction N
Property Type Residential
HOA N
Subdivision Name WEST RIDING
Garage Y/N Y
Water Access Y/N N
Other Structures Above Grade Below Grade
Full Baths 4
Status ACTIVE
Directions Use GPS for better access
City GAITHERSBURG
Disclosures Prop Disclosure
Senior Community Y/N N
Lot Size Units Square Feet
Lot Size Square Feet 9529.00
Tax Annual Amount 8916.0
Structure Type Detached
Condo/Coop Association fee Y/N N
Bathrooms Full Main Level 0
Bathrooms Count Main Level 1.00
Price Per Sq Ft Total AG 403.59
Acceptable Financing Cash VA Conventional FHA
Lease Considered Y/N N
Vacation Rental Y/N N
Standard Status Active
Year Built Source Assessor
Legal Subdivision WEST RIDING
Tax Lot 18
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Interior
Interior Amenities Floor Plan - Traditional
Heating Fuel Natural Gas
Basement Connecting Stairway Fully Finished Improved Interior Access Sump Pump
Flooring Hardwood
Total Fireplaces 1
Hot Water Natural Gas
Basement (Y/N) Y
Heating Y/N Y
Fireplace Y/N Y
Above Grade Finished Area 2230
Half Baths 1
Central Air Y/N N
Total Bedrooms 5
Below Grade Finished Area 700
Main Level Bedrooms 0
Below Grade Finished Area Unit Type Square Feet
Below Grade Finished Area Source Assessor
Above Grade Finished Area Source Assessor
Above Grade Finished Area Unit Type Square Feet
Total Baths 5
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Exterior
Exterior Amenities Play Area Play Equipment BBQ Grill
Pool No Pool
Parking Features Asphalt Driveway
Water Source Public
Inclusions Washer Dryer Dishwasher exhaust fan fireplace garbage disposal microwave refrigerator shades and blinds storage shed stove garage door opener.
Garage Features Garage Door Opener Inside Access
Type of Parking Driveway Attached Garage
Foundation Details Block
Water View Y/N N
Lot Size Acres 0.22
Lot Size Source Assessor
Waterfront Y/N N
Horse Y/N N
Land Assessed Value 216700.00
Navigable Water Y/N N
Water Oriented Y/N N
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Internal Only
Street Number 1 21
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* Excluded Features
List By
Spring Hill Real Estate, Llc.

Broker

psuarez@springhillres.com

Email

Affordability Calculator

$6,426
Per Month
88%
12%
0%
Monthly Principal & Interest
$5,683
Monthly Property Taxes
$743
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
3533413 Elementary School
3533471 Middle School
Unknown High School High School
See complete school information
Pricing History
DatePricePrice ChangeDescription
10/1/2026$900,000 Listed Price

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21 Keystone Drive, Gaithersburg, MD, 20878 is a Single Family Home for sale at $900,000 with 2,930 sqft and a lot size of 0.22. 21 Keystone Drive has 5 bedrooms, 4.1 baths, and was built in 1974. The property's zip code is 20878 which is in Gaithersburg, MD

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