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Living in Triangle

A community in southeastern Prince William County on Route 1 and Interstate 95, south of Dumfries. Detached houses from the 1950s onward mix with newer subdivisions, with Prince William Forest Park to the west and the Potomac River to the east.
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Living in Triangle

An overview of Triangle’s varied housing, nearby parkland and its Route 1 and Interstate 95 connections.
Triangle is a community in southeastern Prince William County, about 32 miles southwest of Washington DC. This page uses the Census-designated place of Triangle. Dumfries lies to the north and northwest, Prince William Forest Park to the west, the Potomac River to the east, and Marine Corps Base Quantico to the south. Route 1 runs through the middle of the community and Interstate 95 passes along its western side. The National Museum of the Marine Corps is located in Triangle near the interstate. Housing here was built over a long period, so streets differ from one to the next. Homes sold in the past 12 months range from the 1940s to the 2020s: older houses from the 1950s and 1960s sit on established streets, and subdivisions from the 2000s and 2010s account for more than half of recent sales. Of 70 closed sales, 56 were detached houses and 14 were townhouses. Detached houses sold at a median of about $650,000 and townhouses at about $427,500. Everyday shopping and services are found along Route 1 in Triangle and in neighboring Dumfries. Prince William Forest Park, a large National Park Service property with wooded trails, borders the community on the west and is the main outdoor destination. The eastern side of Triangle extends toward the Potomac River. Route 1 and Interstate 95 carry most trips, north toward Woodbridge and the Capital Beltway and south toward Stafford and Fredericksburg. Commuter rail is available nearby: Virginia Railway Express Fredericksburg Line trains and some Amtrak trains stop at the Quantico station, in the town of Quantico just south of Triangle. OmniRide, the county’s bus system, operates local and commuter service in eastern Prince William County. There is no Metrorail station in this part of the county. I’m glad to help you sort through Triangle’s older streets and newer subdivisions and to share the recent sales that fit what you are looking for.

Key Highlights:

  • Housing character — Detached houses from the 1950s through the 2020s, with newer subdivisions and a smaller group of townhouses
  • Green space — Prince William Forest Park along the western side, with wooded trails
  • Daily essentials — Shopping and services along Route 1 in Triangle and neighboring Dumfries
  • Transit — No Metrorail; VRE Fredericksburg Line and Amtrak at Quantico station just south, with Route 1 and Interstate 95 by car
  • Schools — Prince William County Public Schools; confirm assigned schools for any address with the district's boundary locator
  • Market character — 70 closed sales in 12 months at a median of about $600,000, with a median of about 18 days on market
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Triangle Real Estate FAQs

Insight into the nuances of buying and selling in one of the country’s most complex urban markets.

Triangle is known for its location on Route 1 beside Prince William Forest Park and as the home of the National Museum of the Marine Corps.
It is in southeastern Prince William County, about 32 miles southwest of Washington DC, with Dumfries to the north, Prince William Forest Park to the west and Marine Corps Base Quantico to the south.
There is no Metrorail station. Virginia Railway Express Fredericksburg Line trains and some Amtrak trains stop at Quantico station, just south of Triangle, and OmniRide runs bus service in the area.
Mostly detached houses, built from the 1950s through the 2020s, along with some townhouses. The past year’s sales were 56 detached houses and 14 townhouses.
The median closed price over the past 12 months was about $600,000. Detached houses had a median near $650,000 and townhouses near $427,500, with sales from $200,000 to $960,000.
The median time on market was about 18 days, with detached houses at 15 days and townhouses at 28 days. Of 70 sales, 40 closed at or above the original list price.
Stores, restaurants and services line Route 1 in Triangle and continue north into Dumfries. Larger shopping areas are farther north along the Route 1 and Interstate 95 corridor.
Triangle is in Prince William County Public Schools. Assignments depend on the address, so confirm them with the district’s boundary locator.

Location & Neighborhood

On Route 1 in southeastern Prince William County, between Dumfries and Quantico.

This page uses the Census-designated place of Triangle. Dumfries lies to the north and northwest, Prince William Forest Park and the Interstate 95 corridor are on the west, Marine Corps Base Quantico borders the south, and the eastern side reaches toward the Potomac River. Route 1 runs north to south through the center and carries most of the commercial frontage. Older residential streets branch off Route 1, and newer subdivisions occupy the land toward the edges.

Route 1, I-95 and VRE

Route 1 runs through the center of Triangle, and Interstate 95 is reached at the community’s western side, with travel north toward Woodbridge and the Capital Beltway and south toward Stafford and Fredericksburg. Virginia Railway Express Fredericksburg Line trains and some Amtrak trains stop at Quantico station, just south of Triangle. OmniRide provides bus service in eastern Prince William County. Interstate traffic at peak hours is the main trade-off.

Stores, restaurants and services are concentrated along Route 1 and continue north into Dumfries, so most errands are short drives. Prince William Forest Park, with its wooded trails, is next door on the west, and the National Museum of the Marine Corps is in Triangle near the interstate. Larger retail centers are farther north along the corridor.

Neighboring Area:

  • Dumfries — north and northwest, along Route 1
  • Prince William Forest Park — west, beyond Interstate 95
  • Marine Corps Base Quantico — south
  • Town of Quantico — southeast, with the VRE and Amtrak station
  • Montclair — northwest, along Route 234

A Day In The Life - Snapshot

The quick details buyers ask about most.

Metro Access
No Metrorail station. Virginia Railway Express Fredericksburg Line trains and some Amtrak trains stop at Quantico station just south of Triangle, and OmniRide runs area bus service.
Walkability
Some streets are within walking distance of Route 1 businesses, but sidewalks are uneven from block to block and most errands are done by car.
Typical Home Types
Detached houses from the 1950s through the 2020s, including ramblers and split-levels on older streets and larger houses in newer subdivisions, plus a smaller number of townhouses.
Parking
Most detached houses have driveways, and newer subdivisions typically add garages. Townhouse sections use assigned and shared surface spaces. Street parking varies by block.
Vibe
A Route 1 commercial strip with residential streets on either side, wooded edges toward the national park, and a mix of older lots and recent subdivisions.
Best For
Buyers who want a detached house with a driveway near Interstate 95, VRE and a large wooded park, and who accept highway traffic and varied housing ages.

Triangle Market Snapshot

A high-level look at current pricing, demand, and sales activity in the Triangle real estate market.
$600,000

Median Sales Price

$192

Median Price Per Sq Ft

18

Median Days On Market

70

Annual Closed Sales

+17.6%

YoY Median Price Change

Triangle is primarily a detached-house market, with a small townhouse segment and no condominium sales in the past year. The snapshot covers every closed sale inside the Census-defined Triangle boundary over the trailing twelve months through September 2026 — 56 detached houses and 14 townhouses and semi-detached homes. Price per square foot uses interior living area.

Across all home types the median sale was $600,000 at about $192 per square foot, with a median of 18 days on market and sales averaging 99% of original list price. The median rose about 18% from the prior twelve months. Within segments, the detached median rose about 17% to $650,000 and the townhouse median held near $428,000.

Market data reflects recent 12-month activity. Individual buildings may vary.

For Sale

Homes for Sale in Triangle

Every active Triangle listing, pulled live from Bright MLS.

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Recently Sold

Recently Sold in Triangle

Closed sales from the past 12 months — the comps that set today’s pricing.

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In-Depth Market Analysis

Triangle Market Insights

How pricing trends, absorption rates, and inventory levels are shaping buying and selling

Inventory & Absorption

Triangle recorded 70 closed sales in the 12 months through September 2026, compared with 68 in the prior 12 months. Detached houses accounted for 56 sales and townhouses for 14. The median time on market was about 18 days, up from 14. Detached houses sold in a median of 15 days, and the smaller townhouse segment took a median of 28 days, compared with 10 days a year earlier.

Pricing Dynamics

The median closed price was about $600,000, up roughly 17.6 percent from $510,000. That jump should be read with care, because the median price per square foot fell from $207 to $192, which points to larger homes making up more of this year’s sales. Detached houses had a median near $650,000, up from $554,000. Townhouses had a median near $427,500. The typical sale closed at about 98.6 percent of the original list price.

Buyer Profile

Detached houses carry the market: 33 of 56 closed at or above the original list price. Sales ranged from $200,000 to $960,000, a spread that reflects the gap between older, smaller houses and recent construction. Townhouses sold between about $332,500 and $480,000, with 7 of 14 closing at or above the original list price and the segment closing at about 97 percent of original list overall.

Strategic Outlook

Sales volume was stable while market times lengthened modestly. The higher median appears to reflect the mix of homes sold as much as a general rise, given the lower price per square foot. Because homes here vary so much in age and size, broad medians are a rough guide, and pricing depends on close comparison with similar houses. Sellers of townhouses in particular should allow for longer marketing times than a year ago.

Market Position Overview:

Inventory Level: Balanced with selective competition

Negotiation Environment: Moderate flexibility

Typical Days on Market: 25-45 (well-priced units)

Rental Demand: Consistent due to transit proximity

Long- Term Outlook: Stable, walkability-driven value

Triangle Housing & Architecture

Housing built across nine decades, from mid-century houses on older streets to subdivisions from the 2000s and 2010s.
Mid-Century Houses
Houses from the 1950s and 1960s stand on Triangle’s older streets off Route 1. They accounted for 15 of the past year’s 70 sales and are often smaller than recent construction, which likely accounts for much of the lower end of the price range.
2000s and 2010s Subdivisions
More than half of the past year’s sales were homes built in the 2000s and 2010s, in subdivisions toward the edges of the community. These are mostly detached houses and likely account for much of the upper price range.
Townhouses
Townhouses are a small segment, with 14 sales in the past year between about $332,500 and $480,000 and a median near $427,500. They took a median of 28 days to sell.
Detached Price Range
Detached houses sold from $200,000 to $960,000, with a median near $650,000 and a median of 15 days on market. The width of that range reflects differences in age, size, lot and condition.
Homes Near the Park
The western side of Triangle borders Prince William Forest Park, and some streets back toward wooded land. Interstate 95 also runs along this side, so buyers should check noise levels at different times of day.
Toward the Water
The eastern side of the community extends toward the Potomac River, and a few street and subdivision names, such as Graham Park Shores, refer to the water. Check flood zone status and insurance requirements for any low-lying property.

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