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$900,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 5 Beds
  • 4 Full Baths
  • 1 Partial Bath
  • 3,158 Sq. Ft.
  • 1 Car Garage
  • Updated 4 hours ago

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Open House: 2:00 PM - 3:30 PM

Sunday 10/11 2:00 PM - 3:30 PM

21 Keystone Drive,Gaithersburg, MD 20878

21 Keystone DriveGaithersburgMD20878

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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!

Full Property Details for 21 Keystone Dr

General

  • Price: $900,000
  • Taxes: $8,916 (2026)
  • Status: Active
  • Type: Single Family
  • Source: BrightMLSMidAtlantic
  • MLS ID: MDMC2258154
  • Updated: Today (10/2/2026)
  • Added to Site: Today

Interior

  • Interior Features: Floor Plan - Traditional
  • Fireplace: Yes
  • Number of Fireplaces: 1
  • Appliances: Built-In Microwave, Dishwasher, Disposal
  • Flooring: Hardwood

Rooms

Bathrooms

  • Total Bathrooms: 5
  • Full Bathrooms: 4
  • Half Bathrooms: 1
  • Upper Floor Baths: 3
  • Upper - Full Baths: 3
  • Main Floor Baths: 1
  • Main - 1/2 Baths: 1
  • Lower Floor Baths: 1
  • Lower - Full Baths: 1

Bedrooms

  • Total Bedrooms: 5
  • Bedrooms Upper: 4
  • Bedrooms Lower: 1

Exterior

  • Exterior Features: Play Area, Play Equipment, BBQ Grill
  • Porch/Patio/Deck: Porch(es), Patio(s), Terrace

Parking

  • Garage: Yes
  • Garage Spaces: 1
  • Total Spaces: 5
  • Parking Features: Asphalt Driveway
  • Parking Type: Driveway, Attached Garage
  • Garage Description: Garage Door Opener, Inside Access

Location

  • County: MONTGOMERY
  • Subdivision: WEST RIDING
  • Driving Directions: Use GPS for better access
  • City Limits: Yes

School Information

  • School District: Montgomery County Public Schools

Heating & Cooling

  • Cooling Type: Other
  • Cooling Fuel: Electric
  • Heating Type: Central
  • Heating Fuel: Natural Gas
  • Water Heater: Natural Gas

Utilities

  • Sewer: Public Sewer
  • Water: Public

Structural Information

  • Architectural Style: Colonial
  • Structure Type: Detached
  • Construction: Frame
  • Basement: Yes
  • Basement Desc.: Connecting Stairway, Fully Finished, Improved, Interior Access, Sump Pump
  • Foundation: Block
  • Roof: Architectural Shingle
  • Stories Description: Lower 1, Main, Upper 1
  • Square Feet: 3,158
  • Sq. Ft. Source: Assessor
  • Living Area: 2,930 Sq. Ft.
  • Finished Above Grnd: 2,230 Sq. Ft.
  • Finished Below Grnd: 700 Sq. Ft.
  • Year Built: 1974
  • Year Built Source: Assessor

Unit Information

Unit 1

  • Bathrooms-Lower: 1
  • Bedrooms-Lower: 1

Lot Features

  • Lot Size (Acres): 0.22
  • Lot Size (Sq. Ft.): 9,529
  • Lot Size Source: Assessor
  • Zoning: R90

Financial Considerations

  • Price Per Sq. Ft.: $403.59
  • Assessment Year: 2026
  • City/TownTax: $1,697
  • City/TownTax Freq: Annually
  • County Tax: $6,694
  • County Tax Freq: Annually
  • Tax w/Assessment: $648,000
  • Tax Amount: $8,916
  • Tax Year: 2026
  • Tax Total Finished Sq. Ft.: 2930

Disclosures and Reports

  • Ownership: Fee Simple
  • Inclusions: Washer , Dryer, Dishwasher, exhaust fan, fireplace, garbage disposal, microwave, refrigerator, shades and blinds, storage shed, stove, garage door opener.
  • Lot Number: 18

Listed by Spring Hill Real Estate, LLC., Piedad Suarez

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Listing agent

— 21 Keystone Dr —

  • Piedad Suarez

    Spring Hill Real Estate, LLC.

Listing Office Email: fred@springhillres.com

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 21 Keystone Dr

School District:Montgomery County Public Schools, Gaithersburg, MD
NameGradesDistance
Diamond Elementary School
4 Marquis Drive, Gaithersburg, MD 20878
K-50.2 mi
Lakelands Park Middle School
1200 Main Street, Gaithersburg, MD 20878
6-81.3 mi
Northwest High School
13501 Richter Farm Road, Germantown, MD 20874
9-122.3 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 21 Keystone Dr Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/02/2026
Listed
$900,000
85.61%
MLS
7/20/2007
Sold
$484,900
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 21 Keystone Dr

Year
Property Taxes
Change
Tax Assessment
Change
2025
$8,411
—
$648,000
7%
2025
$8,411
8%
$606,533
7%
2024
$7,817
23%
$565,067
8%
2022
$6,336
-4%
$523,600
—
2022
$6,595
34%
$523,600
—
2018
$4,940
49%
$523,600
-6%
2021
$3,321
-29%
$555,800
39%
2020
$4,672
4%
$400,933
3%
2019
$4,513
2%
$388,167
3%
2018
$4,403
-1%
$375,400
1%
2017
$4,431
5%
$372,167
1%
2016
$4,208
—
$368,933
1%
2015
$4,200
-2%
$365,700
—
2014
$4,264
—
$365,700
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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NMLS#: 1598647

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Listed by Spring Hill Real Estate, LLC., Piedad Suarez

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21 Keystone Drive, Gaithersburg, MD 20878 (MLS# MDMC2258154) is a Single Family property with 5 bedrooms, 4 full bathrooms and 1 partial bathroom. 21 Keystone Drive is currently listed for $900,000 and was received on October 02, 2026. Want to learn more about 21 Keystone Drive? Do you have questions about finding other Single Family real estate for sale in Gaithersburg? You can browse all Gaithersburg real estate or contact a Coldwell Banker agent to request more information.

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