Boiler repair and replacement in Herndon.
A boiler in Herndon is the exception, but its tune-up is still $69 a system and a new one $9,900 to $16,500 installed.
Price range
$9,900-$16,500
8yrs @ 7.99%
$140/mo
15yrs @ 9.99%
$106/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
Book your boiler visit
- Hot water boilers, gas and propane
- Navien, Weil-McLain and Force
- Heating and plumbing teams
Herndon’s boilers are in the older houses, and inside the Town limits the Town issues the permit.
The Town’s 4,841 owner homes split between detached houses, a bit over four in ten, townhouses, about one in four, and condos, more than one in five; the typical one went up in 1981, and about four in ten are older than 1980, which is where the radiators and baseboard tend to be.
Replacing a boiler in Herndon usually means dealing with the chimney. Inside the town limits, permits and inspections come from the Town of Herndon’s own Building Inspections office, not Fairfax County. Mechanical, plumbing and gas work each take a separate trade permit.
The Town’s plumbing and gas permit asks for a gas riser diagram for any new gas appliance or gas line, and the Town puts its review at about 14 business days.
About 27 percent of Herndon town homes are townhouses, and in those, the boiler often shares a tight utility space with the water heater and electrical panel. Access is the challenge. We plan the removal and installation around that tight fit, making sure the new unit fits and the venting route is clear. In the Town’s historic district, most exterior changes need a Certificate of Appropriateness from the Historic District Review Board before work starts. If your new vent would be visible from outside, check with the Town first.
Where the boilers are across Herndon.
Census figures for the owner-occupied homes in each place, and what a boiler call there usually meets.
| Place | Median home built | Most homes are | Heated with | What a boiler call usually meets |
|---|---|---|---|---|
| Franklin Farm | 1985 | single-family houses, about 9 in 10 | electricity, about 5 in 10 | Mostly heat pumps; a boiler is the exception. |
| Herndon | 1981 | single-family houses, about 4 in 10 | electricity, about 6 in 10 | Mostly heat pumps; a boiler is the exception. |
| Dranesville | 1984 | single-family houses, nearly all | electricity, about 6 in 10 | Mostly heat pumps; a boiler is the exception. |
| McNair | 2003 | condo and apartment buildings, about 6 in 10 | gas, about 7 in 10 | Condo buildings: a central boiler is usually the association’s. |
| Floris | 1990 | single-family houses, about 8 in 10 | gas, about 6 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| Hutchison | 1979 | townhouses, about 5 in 10 | electricity, about 7 in 10 | Mostly heat pumps; a boiler is the exception. |
| Sully Square | 2015 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | Condo buildings: a central boiler is usually the association’s. |
Herndon houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The Town of Herndon
Inside the town limits. Floris, Franklin Farm, McNair and Dranesville, on the Fairfax County side, are counted by the Census as places of their own.
- Median home built1981 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 4 in 10 Census
- Most houses built here since about 1980 heat with forced air, so a boiler on these streets is usually in one of the older houses or a custom home.
What boiler repair and replacement cost in Herndon.
A new boiler runs $9,900 to $16,500 installed, the range of our own boiler replacements; a condensing or combi boiler lands at $12,782 to $16,500. A tune-up is $69 a system, regularly $99.
- High-efficiency condensing boiler or combi boiler, installed$12,782 to $16,50060mo @ 0% $213/mo
- Cast iron boiler on the chimney, replaced like for like, installed$9,900 to $13,69060mo @ 0% $165/mo
- Boiler tune-up, one system$69, regularly $99
- Boiler repair diagnostic visit$99
A repair starts with the $99 diagnostic. If the fix is a circulator pump, a valve or an expansion tank, you get that price in writing before we start, and you decide.
Want a closer number before anyone comes out? The boiler estimator asks a few questions about yours and shows the range for that job.
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
What your boiler is telling you in Herndon.
The relief valve leaves a puddle
A drip from the relief valve means the system pressure is climbing toward 30 psi, usually a waterlogged expansion tank or a fill valve that won’t close. It’s a repair, and the valve should never be capped.
What the county says about boilers in Herndon.
Town of Herndon
Inside the town, the permit for a water heater swap comes from the Town of Herndon, not Fairfax County. Under the statewide code it enforces, a gas tank needs one even like for like. Source.
Fairfax County
Fairfax County requires a permit to replace any gas appliance, even like for like: a gas water heater, furnace or boiler. Replacing a fuel-burning appliance also needs a chimney vent certification. Source.
Fairfax County lists replacing a heating or cooling system as mechanical permit work. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. Source.
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. Source.
How to pick who works on your boiler in Herndon.
Questions to ask anybody who quotes you, us included.
Do they know whether you’re inside the Town of Herndon?
Inside the Town limits the permit goes to the Town; outside them, to Fairfax County. Ask which applies before the quote is written.
Can they handle both halves of it?
A hot water boiler is half heating system (the burner, gas valve, flue and controls) and half plumbing (the water loop, circulator pumps, expansion tank, relief valve and zone valves). We hold a Virginia Class A license and run separate heating and plumbing teams, so each half gets a tech who does that trade every day.
Does the quote say how it vents?
A new boiler can stay on the chimney or vent out the wall in plastic pipe. A good quote says which, and whether the chimney needs a liner, because that’s where two quotes for the same boiler usually split.
What our customers say.
…excellent service when my boiler needed to be replaced during the polar vortex. Alex Hittle came quickly, … and replaced my boiler quickly. Alex even managed to change their schedule, with the kind permission of their other customer so that I could have heat again in the freezing weather.
4.95 stars across 1,131 reviews. Read them on our reviews page.
Boiler questions from Herndon.
Do you handle boilers in Herndon?
Yes, we work on hot water boilers burning natural gas or propane. After a $99 diagnostic, we can repair, tune at $69, or replace. Replacement costs range from $9,900 to $16,500 for a standard cast iron unit to $12,782 to $16,500 for a high-efficiency Navien or Weil-McLain. If you are considering a heat pump, that is a separate conversation we can price.
What do I need to know about swapping a boiler in a Herndon townhouse?
In the town, about 27 percent of owner homes are townhouses. Space is tight, so a boiler swap usually means fitting a new unit into the same footprint. If you are considering a change in fuel or system type, we can price a gas or propane boiler swap or discuss what a heat pump would require for your plumbing layout.
Do you work on steam or oil boilers?
No. We work on hot water boilers, the kind that heat radiators or baseboard, on natural gas or propane. If yours is steam or burns oil, we’ll tell you on the phone, and a switch to a heat pump or a gas or propane boiler is ours to price.
Boiler service in the towns next door.
- Boiler repair and replacement in Reston
- Boiler repair and replacement in Sterling
- Boiler repair and replacement in Great Falls
- Boiler repair and replacement in Oakton
- Boiler repair and replacement in Chantilly
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Get the boiler looked at before the cold week.
Call any time: we run 24/7 emergency service. Or book online and pick a window. A tune-up is $69, a repair starts with the $99 diagnostic, and a new boiler gets a written price before any work.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Herndon and the rest of Northern Virginia. Virginia contractor license #2705192276. 4.95 stars across 1,131 reviews on Google, Angi, Yelp, the BBB and Facebook. 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.