Leesburg Homes by the Numbers
Leesburg is older than most of eastern Loudoun. More than 40 percent of its homes went up before 1990, compared with about a quarter across the county.
| Measure | Leesburg (town) | Loudoun County |
|---|---|---|
| Median year built | 1993 | 2002 |
| Built in the 1980s | 19% | 11% |
| Built in the 1970s | 14% | 6% |
| Built before 1970 | 10% | 6% |
| Owner-occupied | 69% | 78% |
Source: U.S. Census Bureau, American Community Survey 2024 5-year estimates. Figures are estimates.
Gas Heat Comes First: Furnace Service and CO Alarms
| Heating fuel | Leesburg (town) | ZIP 20175 | ZIP 20176 |
|---|---|---|---|
| Natural gas | 58% | 50% | 60% |
| Electricity | 39% | 37% | 29% |
| Propane | 2% | 11% | 9% |
A gas or propane furnace burns fuel, so it makes carbon monoxide. The EPA's duct cleaning guide advises having fuel-burning furnaces inspected and serviced before each heating season, and the Consumer Product Safety Commission advises carbon monoxide alarms on every level of the home. Duct cleaning comes after that check; the furnace duct cleaning page explains how the two jobs fit together.
Older Homes Near the Historic District
About 2 percent of Leesburg homes date to before 1940, including houses in the historic district. Houses that gained central air later often run ducts through the attic or basement. Before cleaning an older heating system, the EPA advises checking its materials for asbestos; insulation that is worn, wet or moldy gets replaced, not cleaned.
Dryer Vents in Leesburg Townhomes and Condos
Townhomes and condos with the laundry on an upper floor often vent through a long interior run or the roof. Those runs clog faster and sit at the top of the price range because they need ladder access; the roof dryer vent cleaning page covers how they're cleaned. Loads that take two cycles mean the vent is due.
What Leesburg Homeowners Pay
| Job | Typical price |
|---|---|
| Whole-system duct cleaning, single-family | $500–$800 per system |
| Townhome or condo duct cleaning | $190–$650 |
| Dryer vent cleaning | $135–$360 |
| Camera inspection | $0–$125 |
The air duct cleaning cost guide explains what moves each number and how to read a quote.
Where Leesburg Is
Leesburg sits at the junction of Routes 7 and 15, about 13 miles northwest of Washington Dulles International Airport. It is its own incorporated town, separate from Dulles, Ashburn and Sterling. Farther west on Route 7 lies Round Hill, where most homes heat with electricity or propane instead of gas.
Leesburg Duct and Dryer Vent FAQs
How much does air duct cleaning cost in Leesburg, VA?
Leesburg homes follow Northern Virginia pricing: about $500 to $800 per system for a single-family whole-system cleaning and $190 to $650 for a townhome or condo. A home with two heating and cooling systems pays for each system.
Do I need my gas furnace serviced before duct cleaning?
It's the right order. The EPA advises having fuel-burning furnaces inspected and serviced before each heating season, because they produce carbon monoxide. Duct cleaning doesn't replace that service, and carbon monoxide alarms belong on every level of the home.
Should older Leesburg homes have their ducts cleaned?
Inspect first. Older ductwork is more likely to have loose joints and worn insulation, and the EPA advises checking older heating systems for asbestos before cleaning. If the ducts are sound and only lightly dusty, cleaning is optional.
Is Leesburg part of Dulles?
No. Leesburg is an incorporated town and the county seat of Loudoun County, about 13 miles northwest of Washington Dulles International Airport. Dulles is a separate unincorporated area around the airport.