Leesburg runs its own water and sewer utility, separate from Loudoun Water, and the Town's backflow program inspects non-residential facilities by hazard level. Building and trade permits come from Loudoun County, but only after a Town zoning permit. Call the number on this page to be connected with a local plumber in Leesburg.

What happens when you call
You'll be asked what kind of property it is, what's failing and whether you can stay open. Then you're connected with an independent local plumber who takes commercial work in Leesburg, from historic downtown buildings to newer offices and shopping centers. Ask how pricing works, what the first visit covers and whether the work can be done before opening or after closing.
If sewage is backing up, the Town asks customers to call the Department of Utilities first at 703-771-2750 (after hours, through the police non-emergency line, 703-771-4500). On-call staff check whether the blockage is in the Town main before you hire a plumber.
What affects cost
- The size of the building and how many fixtures or tenants are involved
- Whether a backflow device needs parts and a retest
- Access in older downtown buildings with tight crawlspaces or basements
- Camera inspections or leak tracing before repairs
- Town zoning and County permit steps for larger work
- Scheduling outside business hours
Leesburg's local rules
The Town's water comes from the Potomac River, treated at its Kenneth B. Rollins Water Filtration Plant, plus one groundwater well. It's disinfected with sodium hypochlorite and runs moderately hard, typically 100 to 150 ppm (about 5.8 to 8.8 grains per gallon), varying with rainfall. That's enough for scale in commercial water heaters, ice machines and dishwashers.
The Town's Cross Connection Control Program follows Virginia Department of Health rules. Every testable backflow device must be tested each year by a DPOR-certified tester, with results sent to the Town on its Backflow Test Report Form, and a device that fails needs a passing report within 15 days. Non-residential facilities are inspected according to their hazard level.
Ownership lines matter. The Town maintains water lines up to and including the meter; the supply line from the meter box to the building is the owner's. On sewer, the owner is responsible for the entire lateral to the main, even the part under public property. Washington Gas runs mains in downtown Leesburg; for a gas smell, leave the building and call 911 and 844-WASHGAS (844-927-4427), option 1, from outside.
Before the plumber arrives
- Find the main shutoff and the sewer cleanout
- Pull the last backflow test report and any Town notices
- Clear access to the water heater and mechanical room
- Know who in the lease handles plumbing repairs
- List every fixture showing the problem
Commercial Plumbing questions in Leesburg
Who do we call first when a sewer backup might be coming from the street?
How often must a business's backflow assemblies be tested in this area?
Does a local mailing address mean the town or the county handles our permits?
Who owns the water line between the meter and the building?
More plumbing services in Leesburg
Commercial Plumbing nearby
Helpful guides
Sources
- Town of Leesburg: utilities FAQs
- Town of Leesburg water quality report
- Town of Leesburg: backflow and cross connection program
- Town of Leesburg: home improvement projects
- Loudoun County: building permits
- Patch: Washington Gas main relocation in downtown Leesburg
- Washington Gas: safety and the emergency leak line
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