Water heater repair and replacement in Hamilton.
In Hamilton a new electric water heater costs $2,757 to $5,493 installed, and a propane one $3,379 to $5,485. Utility gas heats only about one home in sixty.
- Permit and expansion tank included
- Tank or tankless
- Dedicated plumbing team
Get your water heater priced
Electric or propane, on a Town well or your own, in a cold that tests both.
Utility gas is close to absent in 20158: roughly one owner home in sixty heats with it, while half heat with electricity and about 29 in 100 with propane, and a home’s water heater generally runs on the same fuel as its heat. A propane heater is plumbed and vented the way a natural gas one is, so it falls in the gas row of the price book at $3,379 to $5,485 installed, Loudoun County’s gas permit included.
The ZIP’s median owner home dates from 1988, a middle figure hiding two housing stocks. Roughly a fifth of all homes here were built in the 1970s, and a fifty-year-old house has probably had three or four water heaters, most of them in a basement or a utility room. Another four in ten were built after 2000, and a tank still original to a 2005 house has passed twenty. The rating plate on its side dates it.
Cold is the local test. A mesonet in Hamilton read 5 below zero on January 23, 2025, and the Purcellville station two and a half miles away logged nine straight days that never got above freezing from January 25 to February 2, 2026. A water heater in a garage, a crawlspace or on an outside wall feels that first: a frozen supply line or drain valve, or a tankless whose freeze protection, Navien’s manual warns, stops working when the power does.
Storms here come as heavy snow, wind and fast water. Snow knocked power out across the county in February 2010, after the Purcellville station measured 34 inches; Tropical Storm Irene closed Route 704 with fallen trees in August 2011; and on August 6, 2020 high water closed Route 7 near Hamilton Station Road. If the basement took water, a sump pump that couldn’t keep up is worth replacing, and in Hamilton it has to empty outside, never into the Town sewer.
Hamilton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Hamilton
ZIP 20158 as a whole: every Hamilton address, the Town and the countryside around it. The Census place for the Town alone has too few homes for steady figures.
- Median home built1988 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 4 in 10 Census
- Most homes aresingle-family houses, about 9 in 10 Census
- Heated withelectricity, about 5 in 10 Census
- Rentedabout 2 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.
What a new water heater costs in Hamilton.
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 Hamilton usually does.
No hot water, and no water at all
On a private well, an outage stops the well pump, so the taps go dry along with an electric water heater. If the water comes back with the power but the heat doesn’t, check the heater’s breaker; if it trips again, an element or thermostat has likely failed, and that’s a repair.
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 Hamilton, 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 Hamilton.
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 Hamilton.
Questions worth asking anybody who quotes you, us included.
Did they ask whether you’re on Town water or a well?
It changes the job. On a well the pressure comes from a pressure tank and a switch, the water may carry sand or iron, and the expansion tank has to be set to that system’s pressure. A quote that never asks is a quote for some other house.
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.
Moises and Oscar responded quickly to our need for a new water heater. They came through with a quick and a professional install at a reasonable price. I trust Tyler, Moises, and the team at SwiftPro with my hvac and plumbing needs.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Water heater questions from Hamilton.
Can a water heater sit in an unheated garage around Hamilton?
It can, with care. With Loudoun’s frost line 24 inches down and a reading of 5 below in town as recently as 2025, the supply lines and the drain valve in a cold garage need insulation, and a tankless needs its power kept on so its freeze protection runs. Tell us where yours sits when you call; it changes how the replacement goes in.
How much is a new water heater in Hamilton?
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 Paeonian Springs
- Water heaters in Waterford
- Water heaters in Purcellville
- Water heaters in Leesburg
- Water heaters in Lovettsville
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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 Hamilton 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.