Cost ยท Ashburn, Loudoun County
Plumbing Cost Ranges for Ashburn, VA Homes
A straight answer to what plumbing work costs, with the details that move each range.
Prices here are ranges for planning, not quotes. The real figure follows diagnosis.
How to use these Ashburn cost ranges
Each range here is a planning figure for a typical single-family home, not a quote. The price of a real job is set after a plumber has seen the problem, because the same symptom can have a ten-minute cause or a two-day one.
The ranges are wide on purpose. They show where jobs of this kind commonly land and which details push one toward the top, so you can judge whether a number someone gives you is reasonable before you agree to it.
Cost ranges by job
| Job | Typical range | What moves the price |
|---|---|---|
| Tank water heater replacement | $1,200 to $2,800 | Tank size, gas or electric venting, and whether code calls for an expansion tank. |
| Tankless water heater installation | $2,500 to $4,800 | Gas line capacity, room on the electrical panel, and where the unit can vent outside. |
| Drain cleaning with a snake | $175 to $450 | Whether the clog is in one fixture's branch or the main line, and how easy the cleanout is to reach. |
| Hydro jetting a main sewer line | $450 to $950 | Length of pipe, roots against grease, and where the cleanout sits. |
| Slab leak detection and spot repair | $1,500 to $4,500 | Time spent locating the leak, how deep the line runs, and breaking concrete against rerouting overhead. |
| Trenchless sewer pipe lining | $3,500 to $8,500 | Feet of pipe lined, pipe diameter, and the condition of the old pipe. |
| Whole-house repiping in PEX | $4,500 to $11,000 | Square footage, bathroom count, and how much wall has to be opened. |
| Garbage disposal replacement | $225 to $550 | Motor size, access to the outlet, and the sink's flange type. |
| Gas line repair or extension | $350 to $1,400 | Length of the run, pressure testing, and what the line connects to. |
Reviewed October 2026 against current published cost guides for the same work. No guide breaks prices out for Ashburn, so treat these as planning ranges. The number on your own job comes after diagnosis.
Why water heater prices spread so far
A like-for-like tank swap is the low end. Moving from a tank to a tankless unit is a different job, because a tankless heater draws far more gas or power at once than the tank it replaces.
That usually means a larger gas line or spare room on the panel, plus a vent run to the outside. Those two items explain most of the distance between the two rows in the table.
Permits sit alongside the price. Loudoun County lists a Plumbing Permit for residential work, and what applies to your job is covered under the permit question on the FAQs page. For choosing between the two heaters, replacing a water heater sets out the tradeoffs.
Why drain and sewer prices change so much
A snake clears a clog in one branch. Jetting scours the whole main line, and lining repairs a damaged pipe from the inside. They solve different problems, so the rows differ by a factor of several.
A camera run usually comes first. It shows whether a line needs cleaning or repair, which is the difference between the lowest and highest rows on the table.
Where the problem sits can matter as much as what it is. Loudoun Water states that the pipe from the house to the edge of the public right of way belongs to the homeowner, while the stretch beyond it is the utility's. A camera measurement from the cleanout tells you which side a defect falls on. See sewer line replacement and no-dig sewer repair for how that plays out.
Leaks, repiping and gas work
Slab leak work is priced as detection plus a spot repair because the two are rarely separable. Many Ashburn homes sit on a basement rather than a slab, so the jobs that come up are often lines under a basement floor or a garage slab.
Repiping scales with the house. A home with a few bathrooms and open access sits near the bottom of its range, and a finished basement with several bathrooms sits near the top. Homes built between 1978 and the middle of 1995 may have polybutylene, and repiping explains how to check.
Wall and ceiling repair after any opened wall is normally a separate trade, so ask whether it is in the figure you are given.
Gas work depends on how far the new line runs. Since 1 October 2025 some residential fuel gas jobs go through county plan review, and that wait can come before the price is even final. Gas line repair has the detail. A garbage disposal replacement is the smallest job on the list and rarely strays far from its range.
Questions to ask before you agree to a price
Five questions worth asking any plumber
- What exactly does the number include, and what would change it?
- Is the permit included, and who pulls it?
- Are drywall, flooring or paint repairs separate?
- Is the state license current? You can check it on the Virginia license lookup before booking.
- What happens to the price if the job turns out larger than it looked?
A plumber who answers these plainly before starting is giving you the information that protects you if the work grows.
What a price range on the phone looks like
Describe what you can see, where it is, and roughly how old the house is. From that we can give a range for the likely cause, and say what would move it up or down.
The firm price comes after diagnosis, once the plumber has seen the line or the unit. Questions about the problem itself are answered on the plumbing FAQ and the page for that service.
Call with your problem to get a range for the likely cause
Call and describe the problem. We will give you a range for the likely cause and say what would change it.