12421 Rock Ridge Rd is a 1,220 square foot house on a 0.29 acre lot with 5 bedrooms and 3 bathrooms. - it last sold on December 12, 1986 for $135,790. Based on Redfin's Herndon data, we estimate the home's value is $687,019.
Single-familyProperty Type
1986Year Built
0.29 acresLot Size
$563Est. Price/Sq.Ft.
1 spaceParking
Source:Public Records
Redfin Estimate
$687,019
$551K since sold in December 1986$10K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 3.2% lower than the average sale price ($709K) of 6 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-3
Residential District, Three Dwelling Units/Acre
The R-3 District provides for single-family detached dwellings and affordable dwelling unit developments and allows other uses that are compatible with the suburban residential character of the district.
Permitted uses
Include but are not limited to:
Housing-Group
Housing-Single unit
Public service
May 8, 2024 • Final
Residential addition/alteration
Demolish the existing deck and construct a new deck with stairs. The project includes installing above-rail lattice and synthetic railing. No hot tub is included in the scope of work.
Remodel
May 12, 2023 • Final
Household appliance
Install a new heat pump system.
Heat pump
HVAC
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 Finish: Full
Basement Type: Full Daylight
Bathroom Information
# of Full Baths: 3
Heating & Cooling
Heating Fuel Type: Gas
Heating Type: Heat Pump
Room Information
# of Rooms: 9
Exterior
Exterior Information
Construction Type: Wood
Exterior Wall: Aluminum Siding
Roof Covering Type: Composition Shingle
Building Type: Single Family
Property Information
Subdivision Name: CRESTBROOK
Living Sq. Ft: 1,220
Adjusted Gross Sq. Ft: 1,220
Building Sq. Ft: 1,508
# of Stories: 1
Stories Type: Split Foyer
Legal Description: CRESTBROOK LT 45 SEC 7
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 288
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 12,789
Legal Lot Number: 45
Municipality Name: DRANESVILLE
Acres: 0.2936
Zoning Code: R-3
County Use Description: RESID 1 FAM DETACHED
Utility Information
Electricity / Wiring Type: Connected
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax Area: DRANESVILLE
Public facts
Beds: 5
Baths: 3.0
Sq. Ft.: 1,220
Stories: 1.0
Lot Size: 0.29 acres
Style: Single Family Residential
Year Built: 1986
Year Renovated: —
County: Fairfax County
APN: 0102 12 0045
Home facts updated by county records on Jul 30, 2026
Around this home
Schools
Dranesville Elementary School
Public PreK-6 • Assigned • 0.5mi
5/10
Herndon Middle School
Public 7-8 • Assigned • 2.1mi
3/10
Herndon High School
Public 9-12 • Assigned • 0.7mi
2/10
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
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
7/10 Heat Factor
7 days above 102° expected this year, 16 days in 30 years
4/10 Wind Factor
11% 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
Herndon, VA • 20170
Average low and high temperatures (°F)
38
23
45
28
63
40
71
49
75
56
86
66
90
71
84
65
79
60
70
47
58
40
45
29
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9.3 hours in
June and 4.1 hours in December, placing it below the
U.S. average for solar exposure.
9.3 hrs
4.1 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$653,000 – $791,000
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