Heating, cooling and plumbing in Delaplane, propane country under the Blue Ridge.
About half of Delaplane heats with propane, and FCWSA runs no water system here. A repair diagnostic visit is $99. What we find in 20144 and who signs off.
- Prices in writing, first
- Dedicated HVAC and plumbing teams
- Virginia license #2705192276
Get your price in writing
Fieldstone farmhouses, and a lot of houses from the 1990s.
Across ZIP 20144 the Census puts the median owner home at 1986. About half of all homes went up in the 1980s and 1990s, the 1990s alone four in ten, while about one in ten is older than 1940.
The old valley houses are farm dwellings, most from the 1800s, and the National Register nomination for the Crooked Run Valley notes how many were built of local fieldstone. Plumbing, wiring and central heat came to houses like that long after they were built, often more than once, so the pipe in one wall can be decades older than the pipe in the next.
The 1990s houses are the bigger group. Nearly every home in 20144 is a detached house, about one household in five rents, and a house from that decade is on its second furnace or heat pump by now, or close to needing one. Gray plastic supply line from those years is polybutylene, and it’s worth replacing before it lets go.
The heat is propane first. About half of owner homes burn propane from a tank on the property, about three in ten heat with electricity, close to one in ten with oil and a few with wood. The Census finds no natural gas heat anywhere in the ZIP.
Propane furnaces, heat pumps and plumbing fed by a well.
We run a heating and cooling team and a separate plumbing team, both from our shop on Lafayette Center Drive in Chantilly.
Heating
With propane in about half the houses, a no-heat call here is likely a propane furnace that won’t light, or a heat pump stuck on its backup heat. Look at the tank gauge before you call: if it reads empty, the propane company comes first. Oil burners we don’t touch, but replacing one with a propane furnace or a heat pump is ours to price.
Cooling
Behind a propane furnace, the outdoor unit is usually a plain air conditioner that sits idle all winter, so a summer repair stays a summer repair. Where it’s a heat pump, it carries the heat as well. Farmhouses that never had ductwork are good candidates for ductless mini-splits.
Plumbing
The well, its pump and the septic tank go to well and septic contractors. Everything else is ours: the pipes and fixtures, the water heater, a whole-house filter or softener the water runs through, and the drain line out to the tank.
Delaplane pays what everyone else does.
Our book doesn’t change at the county line, and the number is in writing before anyone picks up a tool.
- AC run capacitor replaced$240 to $370
- Refrigerant topped up$190 to $740
- Condensate drain cleared$175 to $420
- Repair diagnostic visit$99
- Drain cleaning, one fixture$200 to $800
- Main sewer line cleaning$550 to $1,650
- Leak detection$200 to $500
- Pressure reducing valve replacement$500 to $1,000
- Water heater, tank, installed$2,757 to $7,494
Every figure comes from the price books behind our plumbing page and AC repair page. Pricing a propane water heater? The water heater estimator includes the Fauquier County permit.
Weighing a new propane furnace or heat pump? The HVAC estimator gives the installed range for your size of house before a visit.
Your own well, your septic, and Fauquier County for permits.
Your water
FCWSA, the county’s water authority, runs sixteen small systems, and its 2025 report puts none of them in Delaplane; the nearest is a two-well system in Paris. So a Delaplane house is almost always on its own well, which FCWSA doesn’t regulate. Fauquier gets 41 to 45 inches of rain a year, and FCWSA says less than a quarter of it soaks down to the bedrock that wells draw from, with groundwater lowest at the end of summer.
Your permit office
Delaplane is unincorporated, so permits come from Fauquier County’s Department of Community Development in Warrenton. Its rule turns on the fuel. Swapping a propane water heater or furnace takes a trade permit every time, even for an identical model, while a similar electric heater set back where the old one stood counts as ordinary repair. Trade permits don’t need drawings, and the County issues them the same day you apply.
Permit pages: Fauquier County.
Your septic system
Wells and septic systems here are permitted by the Fauquier County Health Department, a local office of the state health department. When a drain backs up, the question is whether the blockage is in the line between the house and the tank, which we clear and camera, or in the tank and drainfield, which belong to a septic contractor.
Sources: FCWSA’s list of its sixteen water systems and Virginia Cooperative Extension’s Fauquier well clinics and the County’s health department page.
Rated by homeowners across Northern Virginia.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly).
Listed in both the HVAC and Plumbing categories of Northern Virginia Magazine’s Best Home Experts directory, which is exactly how we’re built: a dedicated HVAC team and a dedicated plumbing team.
Our vans in Delaplane lately
In the last 30 days SwiftPro’s vans worked in Marshall, the towns around Delaplane.
Delaplane is 27 miles from SwiftPro’s Chantilly shop, and the van that comes to you is coming from the last job, not from the shop. SwiftPro charges no distance fees anywhere it serves.
From the old depot out to the valley farms of 20144.
In the village: Winchester Road (Route 17) where it crosses the railroad, Rokeby Road, and the two brick railroad buildings from the 1850s. Out from it: the farms of the Crooked Run Valley north toward Sky Meadows State Park on Edmonds Lane, and the houses along Route 17 down toward I-66. Next door:
Delaplane questions.
Is any of Delaplane on public water?
Not from FCWSA. Its 2025 water quality report lists sixteen systems across Fauquier County, and none of them is in Delaplane; the closest, in Paris, runs on two wells and a small filtration plant. That leaves almost every Delaplane house on a private well that no utility tests for you, so testing it is on you, and the Fauquier County Health Department and Virginia Cooperative Extension’s well clinics are the places to start.
Is my well water eating my copper pipes?
It can be. When Virginia Cooperative Extension ran well clinics in Fauquier, about one first-draw sample in eight, water that had sat overnight in the house’s pipes, carried more than 1 milligram of copper per liter, and the Extension points to acidic water pulling it out of copper pipe and brass fittings. A well test tells you whether yours is that kind of water. If it is, SwiftPro can price replacing the runs that matter most in PEX, which acidic water doesn’t corrode.
Does replacing a propane furnace in Delaplane need a permit?
Yes. Fauquier County counts propane as a fuel like any other, so a new furnace or water heater burning it takes a trade permit, even when it’s the same model going in the same spot. No drawings are needed, and the County issues it the day the application comes in. Our water heater and HVAC estimators count the permit in the price.
Should a Delaplane well have a filter or a softener?
Test the water first, then decide. In the Extension’s Fauquier clinics close to six in ten participating households already had some treatment, and the most common piece was a plain sediment filter; a softener only earns its place if the test shows hard water. SwiftPro installs whole-house filters and softeners, and our guide to filter, softener or neither walks through how to tell which you need.
What does an AC or heat pump repair cost in Delaplane?
The same as anywhere SwiftPro works in Northern Virginia: $240 to $370 to replace a run capacitor, $190 to $740 to top up refrigerant, and $175 to $420 to clear a blocked condensate drain. In a propane house the unit outside is usually an air conditioner, so tell us whether yours also heats the house when you call, and the technician brings the right parts.
Village, valley farm or 1990s house, call us.
Tell us your road, what heats the house and whether the propane tank has fuel in it. We’ll tell you what’s typical for a Delaplane house like yours, about what it costs, and when we can be there.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company serving Northern Virginia, including Delaplane, Marshall, Warrenton and Haymarket. SwiftPro holds Virginia contractor license #2705192276, is a Trane Comfort Specialist, Rheem Pro Partner and Mitsubishi Diamond Contractor, holds 5.0 stars across 884 Google reviews, was voted a Nextdoor Neighborhood Faves winner two years running, for 2026 in 30 Northern Virginia neighborhoods and for 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly), and is listed in both the HVAC and Plumbing categories of Northern Virginia Magazine’s Best Home Experts directory. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team. More at goswiftpro.com.
In Delaplane, SwiftPro repairs and replaces propane furnaces, heat pumps, air conditioners and ductless mini-splits, cleans air ducts and dryer vents, and handles plumbing from drains and leaks to water heaters and whole-house filters, across 20144.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Every town we serve is on the town-by-town guide.