Seven in ten owner homes in Ashburn went up since 2000, which puts most of the town on gas furnaces and heat pumps rather than boilers. When we do find a hot water boiler here, it’s usually in one of the older houses from the 1980s and 90s, about one in four of the town’s owner homes, and it has often gone years without a look.
More of our Ashburn visits are about replacing a heating and cooling system than in any other town where we work regularly, and water heaters come up more than almost anywhere. So when an Ashburn boiler comes up, the question is usually the same one: fix it, replace it like for like, or move the house to a furnace or a heat pump. The $99 diagnostic answers the first part, and the written price covers the rest.
Gas heats about eight in ten owner homes, so an Ashburn boiler is most likely a gas one. A condensing boiler or a Navien combi runs $12,782 to $16,500 installed and vents out the wall in white plastic pipe. A cast iron boiler on a chimney is the rarer job here, and it sits in the $9,900 to $16,500 range with everything else. Loudoun County wants a permit to swap a gas furnace or water heater, and since October 2025 a same-BTU replacement in the same spot needs no plans; ask the installer how the County is treating boiler swaps under that rule.
Ashburn’s heating and cooling service calls lean toward winter more than any other town’s, and a boiler that quits in a January cold snap leaves a cold house fast. Townhouses make up about four in ten Ashburn owner homes, condos about one in five. A townhouse boiler gets the $99 tune-up in its closet like any other, while a condo boiler may be the building’s, so check with the association before booking.
