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Leesburg, VA

Plumbing & HVAC in Leesburg

About 17,155 homes in Leesburg, and 36% of them went up after 2000, with another 41% built across the 1980s and 1990s. Only ten per cent predates 1970, and nearly all of that sits in the historic core.

Leesburg built itself in waves, and the plumbing follows them exactly. That 41% from the 1980s and 1990s is the number we care about most before anyone opens a wall, because polybutylene was being installed from 1978 until about 1995. Only five of the 26 areas we cover have a higher share of post-2000 housing, and fifteen have more pre-1970 stock.

  • Built 1980s and 1990s, 41%. The polybutylene window. Grey pipe, often stamped PB2110, and it fails suddenly rather than giving you a warning drip. Repiping is the answer once you find it.
  • Built in the 1970s, 14%. Copper pinholes, plus Orangeburg sewer laterals in anything that went in before about 1972.
  • Built 2000s and 2010s, 33%. The buried work is still young. What wears out is the builder-grade water heater at around ten years and the first HVAC system at twelve to fifteen.
  • Built before 1970, 10%. The downtown slice. Galvanized supply closing up after sixty years and cast iron drains near the end of their life. Sometimes a lead service line. What each material does as it ages.

Leesburg Is Not On Loudoun Water, And Most Plumbers' Websites Get That Wrong

Know this before you call anybody. The Town of Leesburg owns and operates its own water system, treated at the Kenneth B. Rollins Water Filtration Plant from the Potomac. Loudoun Water, which serves Sterling and Ashburn, is a political subdivision of the Commonwealth rather than a department of Loudoun County, and inside town limits it is generally not your utility at all.

You can see how the mix-up happens. Loudoun Water's own Trap Rock treatment facility, roughly 10 million gallons a day, physically sits in Leesburg, and a Leesburg mailing address does not always mean a Leesburg town address. So page after page quotes Loudoun Water's hardness range to a homeowner the Town bills. Those numbers are real. Wrong town.

What 5.8 To 8.8 Grains Per Gallon Does To Equipment

The Town publishes its hardness as typically 100 to 150 ppm, which is 5.8 to 8.8 grains per gallon, in its 2025 report. That is a maintenance fact, not an emergency. Calcium and magnesium drop out of solution where the water gets hot, so it lands as scale on the bottom of a tank and inside a tankless heat exchanger. Flushing a tank annually earns its keep at this hardness. Whether a softener is worth buying is a judgement call, and we will give you ours straight, including when the answer is no.

The Town Is Still Identifying About 2,000 Service Lines

As of August 2026 the Town's lead programme has roughly 2,000 service lines whose material is still unknown. Unknown is the operative word. Nobody has confirmed what those pipes are, which is not the same as saying they are lead. What makes it worth acting on is the overlap with that 10% pre-1970 figure, because galvanized steel and lead were both in use in the eras that built downtown Leesburg. A plumber can usually identify the pipe in minutes at the meter and at the point of entry, and working out what is actually buried is half of what we do out here.

Two Permit Desks, And The Town Is Only One Of Them

Leesburg does not issue trade permits. Every building permit for your house comes from Loudoun County Building and Development, which catches people out, because the Town also requires its own Zoning Permit first for the project types it lists.

Here is the part we see stated wrongly: water heaters and service-line replacement are not on the Town's zoning permit list. So you very probably do not need a Town zoning permit to swap a water heater, and the Town's own page tells you to confirm with the County.

  • Water service, new or replacement. County plumbing permit published at $70.
  • Sewer lines, new or replacement. Also $70. The county's own term is Sewer Lines, not sewer lateral, which matters when you read the schedule yourself.
  • Adding, replacing or relocating plumbing equipment. $70 for one and two family dwellings including two inspections, $105 commercial. No water-heater line item exists, so this is the line that applies.
  • Gas work. May add a separate $70 gas permit.
  • Re-inspections. $30 each.

Those come from Loudoun County's fee schedule marked effective July 1, 2022, so we quote them as published rather than as today's price. Inspections book through LandMARC with a midnight cut-off for next-workday scheduling, and run 8:30 a.m. to 3 p.m. Monday to Friday. Inspectors themselves are reachable 8 to 8:30 a.m. and 3 to 4 p.m. Narrow windows, which is why we make those calls.

Pressure Is Code, Not Local Policy

The Virginia Department of Health requires a minimum of 20 psi within the distribution system, and above 80 psi at the service tap the Uniform Statewide Building Code requires a pressure-reducing valve. Both apply to a Leesburg house as they do anywhere in the Commonwealth. If your pipes bang when a valve shuts, or you replace fill valves and supply hoses more often than feels reasonable, put a gauge on a hose bib before you replace anything else.

Backflow, Stated Carefully

One mandate we can point to in writing is Loudoun Water's, covering fire suppression and irrigation. Leesburg is not Loudoun Water, so confirm the requirement with the Town rather than assuming the county utility's rule carries over. One piece is statewide and not in doubt: since 1 January 2023 whoever tests the device must hold a Virginia DPOR tradesman certification. We install and replace assemblies, and we will not tell you we certify the annual test.

The Downtown Jobs And The Everything-Else Jobs

Work in the historic core takes longer and we price it accordingly. Narrow access, old streets, finished surfaces nobody wants disturbed, and pipe installed long before anyone imagined a camera going down it. A sewer lateral replacement downtown is a planning job. The same job in a 2004 subdivision is a day.

Heating and air splits along the same line. With 77% of the town built since 1980, most systems here are first or second generation, and plenty are heat pumps rather than furnaces. The common finding is not a dead unit. It is a unit sized for a different house than the one it sits in, because somebody replaced like-for-like without checking whether like was ever right.

Leesburg is about fifty minutes from our shop in Woodbridge, the far edge of our routine range, and we would rather say so than pretend. We schedule Leesburg work instead of scrambling to it, except for genuine emergencies. Forty years, Virginia Class A licence #2705131990, one crew for the plumbing and the mechanical. Call (703) 491-6542 or send us the details, and tell us the age of the house when you do.

Common Questions

Am I on Loudoun Water or Town of Leesburg water?
Look at who sends the bill. Addresses inside Leesburg town limits are generally on Town of Leesburg water and sewer, treated at the Town's own Kenneth B. Rollins Water Filtration Plant from the Potomac. Loudoun Water serves Sterling and Ashburn. A Leesburg mailing address is not proof of either, and the distinction matters, because the two utilities publish different hardness figures and run separate lead programmes.
How hard is Leesburg water?
The Town's 2025 report gives it as typically 100 to 150 ppm, or 5.8 to 8.8 grains per gallon. Do not use Loudoun Water's published range for a Town address. It is a different system, and for what it is worth that figure comes from a July 2011 document rather than a recent report.
Does my Leesburg house have a lead service line?
We cannot tell you from the address and neither can anyone else. What is published is that the Town is still identifying roughly 2,000 service lines of unknown material as of August 2026. Unknown means unidentified, not lead. If your house is in the older part of town, having the pipe identified at the meter and at the point of entry is a sensible hour's work.
Do I need a Town of Leesburg permit to replace my water heater?
Probably not a Town zoning permit. Water heaters are not on the Town's list of project types that require one, and the Town does not issue trade permits at all. The plumbing permit comes from Loudoun County Building and Development, and the Town's own page says to confirm with the County. We handle both ends of that.
What does the county charge for a water service or sewer line permit?
Loudoun County's published fee schedule, marked effective July 1, 2022, lists water service new or replacement at $70 and sewer lines new or replacement at $70, with re-inspections $30 each. We quote those as published and check current pricing before anything reaches your invoice.
How old are most houses in Leesburg?
About 41% were built in the 1980s and 1990s and 36% since 2000, with the 2000s the most common single decade, out of roughly 17,155 homes. Only 10% predates 1970. That is Census table B25034 for Leesburg town, and age remains the best single predictor of what your pipe is made of.
Does my Leesburg house have polybutylene?
Nobody can tell from an address. What we can tell you is that 41% of homes here went up in the 1980s and 1990s, and polybutylene was installed from 1978 until roughly 1995. It is usually grey and often stamped PB2110. Check at the water heater and under the sinks. If it is there, plan the repipe before it picks the date for you.
Do you come out to Leesburg at night?
For a genuine emergency, yes. Leesburg is about fifty minutes from Woodbridge, so for anything that is not an emergency we will give you a scheduled slot rather than a vague window, which is honestly the better outcome for you.
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