12878 Knight Arch Rd is a 3,938 square foot house on a 0.3 acre lot with 5 bedrooms and 4.5 bathrooms. Based on Redfin's Fairfax data, we estimate the home's value is $1,263,644.
Single-familyProperty Type
2005Year Built
0.3 acresLot Size
$321Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,263,644
$19K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 0.8% higher than the average sale price ($1.25M) of 5 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2026
$13,015 (+1.1%)
$377,000 + $751,290
$1,128,290
2025
$12,870 (+6.0%)
$377,000 + $751,290
$1,128,290
2024
$12,137 (+9.3%)
$362,000 + $751,290
$1,113,290
2023
$11,100 (+1.5%)
$337,000 + $710,610
$1,047,610
2022
$10,931 (+5.1%)
$327,000 + $656,640
$983,640
2021
$10,405 (−0.3%)
$312,000 + $643,940
$955,940
2020
$10,434 (+3.1%)
$282,000 + $604,630
$886,630
2019
$10,121 (+2.2%)
$277,000 + $604,630
$881,630
2018
$9,904 (+2.4%)
$277,000 + $578,180
$855,180
2017
$9,670 (+2.2%)
$277,000 + $555,940
$832,940
2016
$9,462 (+4.0%)
$277,000 + $539,750
$816,750
2014
$9,094 (+7.3%)
$277,000 + $539,750
$816,750
2013
$8,477 (+11.1%)
$277,000 + $539,750
$816,750
2011
$7,632 (+0.8%)
$252,000 + $466,930
$718,930
2010
$7,569
$242,000 + $460,750
$702,750
2009
$7,569 (−4.5%)
$232,000 + $452,390
$684,390
2008
$7,929
$252,000 + $527,270
$779,270
Tax history for 12878 Knight Arch Rd
Year
Property tax
Land + Additions
Assessment*
2026
$13,015 (+1.1%)
$377,000 + $751,290
$1,128,290
2025
$12,870 (+6.0%)
$377,000 + $751,290
$1,128,290
2024
$12,137 (+9.3%)
$362,000 + $751,290
$1,113,290
2023
$11,100 (+1.5%)
$337,000 + $710,610
$1,047,610
2022
$10,931 (+5.1%)
$327,000 + $656,640
$983,640
2021
$10,405 (−0.3%)
$312,000 + $643,940
$955,940
2020
$10,434 (+3.1%)
$282,000 + $604,630
$886,630
2019
$10,121 (+2.2%)
$277,000 + $604,630
$881,630
2018
$9,904 (+2.4%)
$277,000 + $578,180
$855,180
2017
$9,670 (+2.2%)
$277,000 + $555,940
$832,940
2016
$9,462 (+4.0%)
$277,000 + $539,750
$816,750
2014
$9,094 (+7.3%)
$277,000 + $539,750
$816,750
2013
$8,477 (+11.1%)
$277,000 + $539,750
$816,750
2011
$7,632 (+0.8%)
$252,000 + $466,930
$718,930
2010
$7,569
$242,000 + $460,750
$702,750
2009
$7,569 (−4.5%)
$232,000 + $452,390
$684,390
2008
$7,929
$252,000 + $527,270
$779,270
*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-2
WSPO
Residential District, Two Dwelling Units/Acre
The R-2 District provides for single-family detached dwellings and affordable dwelling unit developments and allows other uses that are compatible with the low-density suburban character of the district.
Zone overlays
Water Supply Protection Overlay District
Permitted uses
Include but are not limited to:
Housing-Group
Housing-Single unit
Public service
Jul 2, 2021 • Active
Household appliance
Replace an existing gas water heater with a new unit of the same capacity and heating output.
Plumbing
Water heater
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: 360
Basement Finish: Full
Basement Type: Full Daylight
Bathroom Information
# of Full Baths: 4
# of 1/2 Baths: 1
Heating & Cooling
Heating Fuel Type: Gas Public/Piped
Heating Type: Central
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Exterior
Exterior Information
Exterior Wall: Vinyl
Building Type: Single Family
Property Information
Subdivision Name: ESTATES/FAIRFAX
Living Sq. Ft: 3,938
Adjusted Gross Sq. Ft: 3,578
Building Sq. Ft: 4,378
# of Stories: 2
Stories Type: 2
Legal Description: ESTATES AT FAIRFAX LT 15
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 440
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 13,051
Legal Lot Number: 15
Municipality Name: SPRINGFIELD DIST. #2
Acres: 0.2996
Zoning Code: R-2C
County Use Description: RESID 1 FAM DETACHED
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax Area: SPRINGFIELD DIST. #2
Public facts
Beds: 5
Baths: 4.5
Sq. Ft.: 3,938
Stories: 2.0
Lot Size: 0.3 acres
Style: Single Family Residential
Year Built: 2005
Year Renovated: —
County: Fairfax County
APN: 0554 18 0015
Home facts updated by county records on Jul 30, 2026
Around this home
Schools
Eagle View Elementary School
Public PreK-6 • Assigned • 1.7mi
6/10
Johnson Middle School
Public 7-8 • Assigned • 3.7mi
6/10
Fairfax High School
Public 9-12 • Assigned • 5.8mi
6/10
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
6/10 Heat Factor
7 days above 103° expected this year, 16 days in 30 years
4/10 Wind Factor
14% 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
Fairfax, VA • 22030
Average low and high temperatures (°F)
39
23
45
28
63
40
71
49
74
55
85
65
89
72
81
64
78
61
69
48
59
41
45
30
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
$1.20M – $1.45M
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