Water heater repair and replacement in Round Hill.
A new electric water heater in Round Hill runs $2,757 to $5,493 installed and a propane one $3,379 to $5,485, with the permit and expansion tank in the price.
- Permit and expansion tank included
- Tank or tankless
- Dedicated plumbing team
Get your water heater priced
Electric or propane, on Town water hard enough to change the quote.
Natural gas hardly reaches 20141: about 2 in 100 owner homes heat with it, against 53 on electricity and 40 on propane, and the water heater usually matches. A propane water heater goes in like any gas one, burner, gas valve and flue pipe, and it’s priced in the natural gas row, $3,379 to $5,485 installed.
The typical owner’s home in the ZIP dates from 2004, and close to six in ten went up after 2000. The heater usually sits in the basement, often in an unfinished corner where a slow drip can go unnoticed for weeks. One original to a 2004 house is past twenty; a replacement’s label gives its date.
The Town’s 2025 water report measured hardness at 115 to 317 mg/L on the main system and 182 on Stoneleigh’s, and its handbook warns that the calcium builds up over time in a water heater: scale on a tank’s bottom and on an electric heater’s lower element. A tankless feels it most. Navien’s installation manual for its NPE-2 lists 200 mg/L as the maximum allowable hardness, and past 12 grains a gallon it calls a softener or its own scale treatment required. The top of the Town’s range sits well above that, so price a propane tankless here, $8,886 to $10,486 installed, with the treatment in the conversation.
The same report says Loudoun County has required a pressure reducing valve on new water services for years, and that the valve wears, can clog and is the homeowner’s to keep up; on Stoneleigh the Town is studying new valves for the lower elevations. Too much pressure often shows up as a weeping relief valve.
Round Hill houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Round Hill
ZIP 20141 as a whole: every Round Hill address, the Town and the neighborhoods around it. The Census place for the Town alone has too few homes for steady figures.
- Median home built2004 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 6 in 10 Census
- Most homes aresingle-family houses, about 9 in 10 Census
- Heated withelectricity, about 5 in 10 Census
- Rentedabout 1 in 10 Census
- Where the heat is electric the water heater usually is too, and that’s the simpler swap: no flue and no gas line to deal with.
- A lot of original water heaters here went in during the 2000s, and a tank that age is past the years most of them last.
What a new water heater costs in Round Hill.
Installed, from our water heater estimator, which is the price book. Everything is in the number: the permit and the inspection, the expansion tank, the drain pan, hauling the old one away, and the labor.
- Electric tank, installed$2,757 to $5,493
- Gas or propane tank, installed$3,379 to $5,485
- Power vent tank, installed$5,957 to $7,494
- Tankless, installed$8,886 to $10,486
How the house vents picks the row; where you land inside it is the tank size and the warranty. A hybrid heat pump water heater is quoted at the visit, never from a page.
Keeping the one you have? A yearly water heater flush slows the sediment down: $99 right now, normally $199. A tankless descale is $300, regularly $350. Or get the flush every year with Comfort+ membership, $199 a year, along with a dryer vent cleaning, a sewer camera inspection and heating and cooling maintenance visits.
What a failing water heater in Round Hill usually does.
No hot water after the propane ran out
When the propane tank in the yard runs dry, the pilot goes out too. The supplier usually checks the system before refilling; then the pilot needs relighting, and if it won’t stay lit, that part is ours.
Warm, never hot, on an electric tank
An electric tank has two elements. When one fails the water still warms, just never all the way; it’s a common, fixable part.
Water on the floor around it
A drip from a valve can be fixed. Water from the tank itself can’t; once the lining goes, the only fix is a new heater, and sooner beats later.
After a storm in Round Hill, check the water heater.
A water heater usually sits on the lowest floor of the house, so it’s one of the first things standing water reaches. Three checks, then call us.
Water reached the burner or the gas controls
Leave it off and don’t relight it. The warning label on a gas water heater says not to use it if any part has been under water, and to have a service technician replace the gas control.
An electric tank sat in water
Shut its breaker off at the panel, but only from somewhere dry. The elements and the thermostats get checked before it heats again.
Water around it after the rain stopped
Mop it up and look again in an hour. Water that comes back with no rain is the tank or a valve, not the storm.
Call us after a storm and we’ll check it: the gas control or the elements, the burner, the venting and the drain pan. If it has to be replaced, you get the price in writing before anything comes out.
Who signs off on a new water heater in Round Hill.
Loudoun County
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. Source.
A burst tank doesn’t wait on paperwork: under Virginia’s building code the replacement can start first, as long as the permit application reaches Loudoun County by the end of the next working day. Source.
How to pick the best water heater installer in Round Hill.
Questions worth asking anybody who quotes you, us included.
Did they ask about a softener before pricing a tankless?
At up to 317 mg/L, an untreated tankless runs past its own maker’s hardness limit. A quote that skips the question is missing a line.
Is the permit in the price?
A gas water heater always needs a permit, an electric one often does, and skipping it tends to surface when the house sells. Ask whether the quote includes it and the inspection.
Is there an expansion tank in the quote?
Most houses here have a check valve or a pressure reducer on the incoming line, so the heated water has nowhere to go. An expansion tank gives it somewhere, and leaving it out is how quotes come in low.
Will they tell you when a repair will do?
A thermocouple, an element or a valve is a repair, not a new heater. A good plumber says so, and saves the replacement talk for a leaking tank.
What our customers say.
This Company installed a tankless water system!!! They were great!!! Very Professional & Efficient & they Cleaned up & took out the old water tank! I would highly recommend them!!
5.0 stars across 884 Google reviews. Read them on our reviews page.
Water heater questions from Round Hill.
Does my water heater work when the power goes out?
An electric one won’t. A propane tank with a standing pilot usually keeps heating, since the pilot’s own heat powers its gas valve; a power-vent or tankless one quits with the power. Both outages and deep cold happen here: snow knocked out power across Loudoun County in February 2010, and a station a mile southeast of town read 5 below on January 23, 2025. Navien says to drain a tankless if a long outage hits in freezing weather.
Do basements around Round Hill really take water?
Some do. On May 5, 2025, two to four inches of rain fell across Loudoun, and the fire department reported several flooded basements about two and a half miles north-northeast of town; in July 2017 a downpour closed Main Street at Greenwood Drive. If water reached the heater, leave it off until it’s checked.
How much is a new water heater in Round Hill?
Installed, with the permit, the expansion tank, the pan and the haul-away: an electric tank $2,757 to $5,493, a gas or propane tank on the flue you have $3,379 to $5,485, a power vent tank $5,957 to $7,494, and a tankless unit $8,886 to $10,486. The estimator gives your exact number in about a minute.
Water heaters in the towns next door.
- Water heaters in Purcellville
- Water heaters in Hamilton
- Water heaters in Middleburg
- Water heaters in Lovettsville
- Water heaters in Leesburg
More from SwiftPro in Round Hill
Tell us how old yours is.
Call, or book online and pick a window. The age on the label and what it’s doing tell us most of what we need, and you get the price before anything comes out.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Round Hill and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.