3603 Old Post Rd is a 2,650 square foot house on a 0.33 acre lot with 5 bedrooms and 2.5 bathrooms. Based on Redfin's Fairfax data, we estimate the home's value is $828,548.
Single-familyProperty Type
1985Year Built
0.33 acresLot Size
$313Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$828,548
$2,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 5.2% higher than the average sale price ($787K) of 6 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
$9,595 (+3.5%)
2025
$9,267 (+12.9%)
2024
$8,209 (+7.6%)
2023
$7,626 (+4.8%)
$218,700 + $553,200
$771,900
2022
$7,274 (−0.9%)
$213,800 + $506,400
$720,200
2021
$7,340 (−16.4%)
$213,800 + $506,400
$720,200
2020
$8,778 (+26.6%)
$213,800 + $469,000
$682,800
2019
$6,935 (−18.2%)
$213,800 + $446,200
$660,000
2018
$8,481 (+29.3%)
$213,800 + $431,300
$645,100
2017
$6,558 (+123.8%)
$205,700 + $413,000
$618,700
2014
$2,930 (−49.0%)
$190,700 + $372,900
$563,600
2013
$5,745 (+19.7%)
$183,400 + $358,600
$542,000
2010
$4,799 (+100.0%)
$181,600 + $355,000
$536,600
2009
$2,399
$174,600 + $341,300
$515,900
2008
$183,800 + $376,100
$559,900
Tax history for 3603 Old Post Rd
Year
Property tax
Land + Additions
Assessment*
2026
$9,595 (+3.5%)
2025
$9,267 (+12.9%)
2024
$8,209 (+7.6%)
2023
$7,626 (+4.8%)
$218,700 + $553,200
$771,900
2022
$7,274 (−0.9%)
$213,800 + $506,400
$720,200
2021
$7,340 (−16.4%)
$213,800 + $506,400
$720,200
2020
$8,778 (+26.6%)
$213,800 + $469,000
$682,800
2019
$6,935 (−18.2%)
$213,800 + $446,200
$660,000
2018
$8,481 (+29.3%)
$213,800 + $431,300
$645,100
2017
$6,558 (+123.8%)
$205,700 + $413,000
$618,700
2014
$2,930 (−49.0%)
$190,700 + $372,900
$563,600
2013
$5,745 (+19.7%)
$183,400 + $358,600
$542,000
2010
$4,799 (+100.0%)
$181,600 + $355,000
$536,600
2009
$2,399
$174,600 + $341,300
$515,900
2008
$183,800 + $376,100
$559,900
*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
RH
Residential High District
The Residential High District is established to provide areas for single-family detached residences with a minimum lot area of 6,000 square feet.
Permitted uses
Include but are not limited to:
Housing-Group
Housing-Single unit
Infrastructure
Communications tower
Nov 18, 2025 • Final
Residential gas
Replace a gas furnace with a new unit of the same capacity. The work is subject to a field inspection.
Gas
Nov 18, 2025 • Final
Residential mechanical
Replace a three ton air conditioning unit. The work is subject to a field inspection.
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
Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 1
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 11
Exterior
Exterior Information
Building Style Type: Colonial
Exterior Wall: Vinyl
Roof Shape Type: Gable
Property Information
Subdivision Name: OLD POST ESTATES
Living Sq. Ft: 2,650
Building Sq. Ft: 2,650
Legal Description: OLD POST ESTATES LT 3 - 14,918 SF
Lot Information
# of Buildings: 1
Land Sq. Ft: 14,198
Legal Lot Number: 3
Acres: 0.3259
Zoning Code: RH
County Use Description: RESID 1 FAM DETACHED
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 2.5
Sq. Ft.: 2,650
Stories: —
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 0.33 acres
Style: Single Family Residential
Year Built: 1985
Year Renovated: 1990
County: Fairfax City
APN: 57 2 23 003
HOA Dues: —
Garage: —
Features: —
Home facts updated by owner on Jun 24, 2023
Around this home
Schools
Daniels Run Elementary School
Public PreK-6 • Assigned • 0.2mi
5/10
Johnson Middle School
Public 7-8 • Assigned • 1.9mi
6/10
Fairfax High School
Public 9-12 • Assigned • 0.6mi
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
7/10 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
2 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 4.2 hours in December, placing it below the
U.S. average for solar exposure.
9.3 hrs
4.2 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$788,000 – $953,000
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