18409 Old Triangle Rd is a 1,536 square foot house on a 1.1 acre lot with 4 bedrooms and 3 bathrooms. - it last sold on July 01, 1979 for $51,000. Based on Redfin's Triangle data, we estimate the home's value is $390,106.
Single-familyProperty Type
1940Year Built
1.1 acresLot Size
$254Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$390,106
$339K since sold in July 1979$4,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 23.3% lower than the average sale price ($508K) 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
R-4
Suburban Residential District
The R-4 district is intended to implement the suburban residential-low, suburban residential-moderate, and community employment center land use classifications of the Comprehensive Plan. This district is designed to provide for and encourage development of quality one-family dwellings at a low to moderate suburban density of approximately four dwelling units per acre or less.
Permitted uses
Include but are not limited to:
Housing-Group
Housing-Single unit
Office
Property details
Interior
Bathroom Information
# of Full Baths: 3
Heating & Cooling
Heating Type: Baseboard
Room Information
# of Rooms: 10
Exterior
Exterior Information
Physical Condition: Average
Exterior Wall: Wood Siding
Property Information
Living Sq. Ft: 1,536
Building Sq. Ft: 1,536
# of Stories: 2
Stories Type: 2 Plus
Legal Description: 6-1-35B
Parking & Garage Information
# of Parking Spaces: 4
Parking Type: Detached - 4 Car Garage
Garage/Parking Sq. Ft: 294
Garage / Carport Type: Detached - 4 Car
Lot Information
# of Buildings: 1
Land Sq. Ft: 47,916
Municipality Name: COUNTY
Acres: 1.1
Zoning Code: R4
County Use Description: RES-1 FAMILY DET
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 1,536
Stories: 2.0
Lot Size: 1.1 acres
Style: Single Family Residential
Year Built: 1940
Year Renovated: 1940
County: Prince William County
APN: 8188-76-6502
Home facts updated by county records on Aug 26, 2026
Around this home
Schools
Triangle Elementary School
Public PreK-5 • Assigned • 0.8mi
3/10
Graham Park Middle School
Public 6-8 • Assigned • 0.5mi
4/10
Forest Park High School
Public 9-12 • Assigned • 4.6mi
7/10
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
3/10 Fire Factor
0.31% chance of being in a wildfire in next 30 years
8/10 Heat Factor
7 days above 104° expected this year, 16 days in 30 years
4/10 Wind Factor
18% chance of strong winds in next 30 years
2/10 Air Factor
1 unhealthy days expected this year, 1 days in 30 years
Provided by First Street
Historical weather
Triangle, VA • 22172
Average low and high temperatures (°F)
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24
46
30
63
41
71
51
75
57
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67
89
73
82
65
78
63
70
50
60
42
46
30
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Sun exposure
In this area, properties receive around 9.5 hours in
June and 4.4 hours in December, placing it below the
U.S. average for solar exposure.
9.5 hrs
4.4 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$371,000 – $449,000
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