9221 Bells Mill Rd is a 4,865 square foot house on a 0.5 acre lot with 4 bedrooms and 3.5 bathrooms. - it last sold on December 23, 1994 for $670,000. Based on Redfin's Potomac data, we estimate the home's value is $1,782,400.
Single-familyProperty Type
1994Year Built
0.5 acresLot Size
$366Est. Price/Sq.Ft.
Source:Public Records
$1,603,874
Updated Jan 18, 2026
Based on recent home sales selected by the homeowner.
*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-200
Residential - 200 Zone
The intent of the R-200 zone is to provide designated areas of the County for residential uses with a minimum lot size of 20,000 square feet. The predominant use is residential in a detached house.
Permitted uses
Include but are not limited to:
Agriculture-Other
Assembly/ meeting place
Housing-Single unit
Housing-Senior
Infrastructure-Other
Public service
Kennel
Transportation-Other
Park & open space
Jul 22, 2024 • Final
Electrical
Electrical
Jul 22, 2024 • Final
Building residential
Remodel
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
Basement Information
Basement Sq. Ft: 1,790
Basement Finish: Finished
Basement Type: Finished
Bathroom Information
# of Full Baths: 4
# of 1/2 Baths: 1
Heating & Cooling
Air Conditioning Type: Split System
Heating Type: Hot Air
Fireplace Information
# of Fireplaces: 2
Fireplace Type: 2 Story Frame
Has Fireplace
Exterior
Exterior Information
Building Construction Quality: Good
Exterior Wall: Frame Brick
Building Type: Single Family
Pool Information
Pool Type: Concrete
Has Pool
Property Information
Subdivision Name: PINE KNOLLS
Living Sq. Ft: 6,293
Building Sq. Ft: 6,791
# of Stories: 2
Stories Type: 2 Story With Basement
Legal Description: PINE KNOLLS
Parking & Garage Information
Parking Type: Built-In Garage
Garage/Parking Sq. Ft: 498
Garage / Carport Type: Built In
Lot Information
# of Buildings: 1
Land Sq. Ft: 21,875
Legal Lot Number: 18
Legal Block Number: 1
Acres: 0.5022
Zoning Code: R200
County Use Description: SINGLE FAMILY DETACH
State Use Description: RESIDENTIAL
Utility Information
Sewer Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax District County: 10
Public facts
Beds: 4
Baths: 3.5
Sq. Ft.: 4,865
Stories: 2.0
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 0.5 acres
Style: Single Family Residential
Year Built: 1994
Year Renovated: 2021
County: Montgomery County
APN: 10 00851821
HOA Dues: —
Garage: No
Features: —
Home facts updated by owner on Jun 4, 2022
Around this home
Schools
Bells Mill Elementary School
Public PreK-5 • Assigned • 1.2mi
10/10
Cabin John Middle School
Public 6-8 • Assigned • 1.1mi
9/10
Winston Churchill High School
Public 9-12 • Assigned • 1.1mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Potomac, MD, is known for its affluent neighborhoods, large estate homes, country clubs and scenic natural beauty, including Great Falls Park and the C&O Canal. It offers a blend of suburban tranquility and upscale amenities, making it a sought-after...