Herndon is an electric town. More Herndon homes heat with electricity than with gas, which flips the usual Northern Virginia price list on its head: here the big job is a heat pump, and the water heater is usually electric. Here’s what the work costs in the Town of Herndon and on the county side in Floris, Franklin Farm and McNair.
Why Herndon prices look the way they do
61% of Herndon’s owner-occupied homes heat with electricity and 37% with gas (Census ACS 2020-2024). The median home dates to 1981, and 43% went up before 1980, so a lot of Herndon’s heat pumps are on their second or third replacement and some of the ductwork is original.
A heat pump replaced in Herndon runs $8,499 to $21,650. From about $142 a month at 0% APR for 60 months, the whole price financed, on approved credit. An electric tank water heater runs $2,778 to $5,493 installed, with the $500 off already in it. From about $46 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Heating and cooling prices in Herndon
Swipe to see all columns →
Swipe to see all columns →
| Job | Price | Monthly, on approved credit |
|---|---|---|
| Heat pump replaced | $8,499 to $21,650 | From $142/mo at 0% APR for 60 months |
| Furnace and AC replaced together | $8,898 to $23,000 | From $148/mo at 0% APR for 60 months |
| AC replaced on its own | $5,942 to $14,450 | From $99/mo at 0% APR for 60 months |
| Ductless mini split, one zone | $7,000 to $10,000 | From $117/mo at 0% APR for 60 months |
| Heat pump defrost repair | $450 to $1,150 | |
| Blower motor replaced | $670 to $2,400 | |
| AC or heat pump diagnostic visit | $99 |
Monthly figures: the whole starting price financed at 0% APR for 60 months, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms.
Free Furnace With a New AC
Put in a new AC with its matching coil and a basic single-stage gas furnace goes in with it, installed together. See the free furnace
Want your own number before anyone comes out? The HVAC estimator prices your house in a few questions.
Water heater and plumbing prices in Herndon
Swipe to see all columns →
Swipe to see all columns →
| Job | Price | Monthly, on approved credit |
|---|---|---|
| Electric tank water heater replaced | $2,778 to $5,493 | From $46/mo at 0% APR for 60 months |
| Gas tank water heater replaced | $3,238 to $5,485 | From $54/mo at 0% APR for 60 months |
| Water heater flush | $99 | |
| Leak detection | $200 to $500 | |
| Main sewer line cleaning | $550 to $1,650 | |
| Sewer line replaced, dug up | $7,500 to $9,000 | From $125/mo at 0% APR for 60 months |
| Pressure reducing valve replaced | $500 to $1,000 |
Monthly figures: the whole starting price financed at 0% APR for 60 months, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms.
Three things that change a Herndon price
Town of Herndon or the county side
Downtown around Elden Street is the Town of Herndon; Floris, Franklin Farm and McNair are Fairfax County with a Herndon address. Inside the Town, building permits go through the Town’s Building Inspections at 777 Lynn Street, and plan review takes about 14 business days. We pull the permit either way; the address decides whose.
The water’s spring switch
The Town buys its water from Fairfax Water, which switches to straight chlorine from April to July and flushes hydrants in spring. If the water smells like a pool for a few months, that’s the switch, not your plumbing.
The leak adjustment
The Town adjusts a bill after a repaired leak: 66% of the extra for a leak inside the house, 100% for a leak in the ground, once in five years. Leak detection runs $200 to $500, and our invoice shows the date and what failed, which is what you send in with the request.
The best deal running right now, by job
- HVAC replacement: Free furnace with a new AC and its matching coil, up to $4,900 value.
- Water heater replacement: $500 off any size, replaced by our own plumbers. Better than the $200 off coupon.
- Backflow test: $250 for the yearly test your water utility asks for, normally $300, and we send the results in for you. Pay online.
- Membership: $199 a year for dryer vent cleaning, a water heater flush, heating and cooling maintenance, and 15% off any service.
- Dryer vent cleaning: $199 with a year of Comfort+ membership included, normally $298.
- Air duct cleaning: $598 for a Whole Home Air Duct Cleaning, regularly $798. Better than the $50 off coupon.
Every current deal and its fine print is on our offers page.
Questions people ask
How much does a heat pump cost in Herndon, VA?
A heat pump replacement in Herndon runs $8,499 to $21,650 from our price book, depending on size, efficiency and whether the air handler goes with it. From about $142 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Why is my electric bill so high in winter in Herndon?
Usually a heat pump leaning on its backup heat strips, from a failed defrost, low refrigerant or an old unit. A defrost repair runs $450 to $1,150 and a refrigerant repair $190 to $740. A diagnostic visit is $99.
Does Herndon require a permit to replace a water heater?
Yes. Inside the Town of Herndon it goes through Town Building Inspections; on the county side, Fairfax County. We pull it as part of the job.
Get your Herndon price
Call (703) 997-9757 or book online and a SwiftPro technician comes out, looks at the actual equipment and writes the price before any work starts. Homeowners rate us 5.0 stars across 1,138 reviews on Google, Angi, Yelp, the BBB and Facebook. More about our work in Herndon is on the Herndon page.
