The Census counts 660 owner homes in ZIP 20137, and the middle one was built in 1979. Just over half heat with electricity, close to three in ten with propane, about one in seven with oil, and none with utility gas. The water heater follows the heat. Where the furnace runs on electricity, the tank usually does too, and an electric one is $2,757 to $5,493 installed. A house with a propane tank in the yard can run a propane heater, $3,379 to $5,485 installed, off it.
The county line decides where the permit goes. Out here the building office is in Warrenton, and a propane or gas heater, or any heater that changes spots, sends you there; an electric tank trading places with a twin skips the permit. Prince William County, which holds about one Broad Run home in six, wants one on a gas or propane heater even like for like. Whatever your job needs is in the installed price.
When a tank bursts, the state code lets the replacement go in before the permit, so long as the application reaches the building office by close of business the next working day. Winter is when tanks quit: late January 2026 put Extreme Cold Warnings on the Northern Fauquier zone for January 27, 30 and 31, the nights a heater in a garage, crawl space or outbuilding works hardest.
Just over half of the ZIP’s owner homes predate 1980. A heater in a house that age may vent through a flue sized for the old tank, so a different style can mean new venting. A power vent tank, $5,957 to $7,494, exhausts through a wall, as does a tankless unit, $8,886 to $10,486. Both need house power, which counts after the March 2, 2018 nor’easter sent a wave of calls to Fauquier County 911.