Plumber Washington DC: $202 to $521 + Lateral Rules (2026)

Published Washington, DC prices from Angi's July 2026 city guide; permit fees from the DC Department of Buildings, which adds a 10% enhanced fee.

Do this now: a leak or sewer backup in a DC home

1. Smell gas? Get everyone out, then call 911 or the gas utility from outside. Do not look for the leak.
2. Close the main water shutoff, or the valve under the fixture if the leak is in one place.
3. Water near outlets or a wet panel: shut power off at the breaker only from a dry spot.
4. Sewage coming up a floor drain? Call DC Water's 24-hour water and sewer emergency line, (202) 612-3400. DC Water checks the public sewer main; if the main is clear, the owner hires a registered master plumber.
5. Take photos before you clean up, and call your insurer if the water reached floors or walls.

Emergency plumber in Washington, DC: is it urgent?

An emergency plumber in Washington, DC bills 1.5 to 3 times the standard hourly rate, Angi's July 2026 DC guide says, and Angi's September 2026 national data puts emergency work at $170 an hour on average with a flat $150 to $300 emergency or trip fee at many companies. Call right away for a burst pipe, sewage coming up a drain, a gas smell, or a leak you cannot stop at a valve.

Cold drives a lot of DC emergencies. Reagan National averages 60.1 nights a year at or below 32 F, NOAA's 1991 to 2020 normals show, and Angi lists burst pipes in winter freezes and sewer backups as the city's common emergencies. A dripping faucet or a slow drain can wait for business hours, when the trip fee is lower.

Looking for a 24 hour plumber in Washington, DC? Some companies take emergency calls at night and on weekends; hours vary, so ask the after-hours fee before anyone is sent. A break in the street or at the meter is DC Water's job: call (202) 612-3400. More on night and weekend rates in emergency plumber costs, and what to do with a frozen line in frozen pipes.

Drain cleaning in Washington, DC: who owns the sewer lateral

Drain cleaning costs $147 to $352 for most homeowners in Angi's 2026 national data, and in DC the sewer lateral from your house is the owner's to clear. DC Water says the property owner maintains the service line and clears clogs in the lateral, and that sewer backup cleanup and damage are most often the owner's responsibility. If DC Water finds its main clear, you hire a registered master plumber at your own expense.

DC Water's page also refers to a public portion of the lateral, and says a plumber who finds a blockage there must report it; it does not publish where the split falls, so ask the plumber to show you on camera. HomeGuide puts a main sewer line cleaning at $175 to $800. Damage claims go to DC Water at (202) 787-2052. See drain cleaning and sewer line repair for national prices by method.

DC water: 7 grains per gallon, and sewers about 85 years old

DC tap water averages 126 ppm of hardness, about 7 grains per gallon, with a range of 78 to 175 ppm, DC Water's 2025 water quality report shows. That is moderate, so scale builds slowly in water heaters and fixtures but it does build. The water is treated by the Washington Aqueduct, run by the U.S. Army Corps of Engineers.

The pipes underground are old. DC Water says most of the pipes in its sewer system are 85 years old, across about 1,800 miles of sanitary and combined sewers, and the Census Bureau puts the median DC home's year built at 1958, against 1980 nationally. Water heater prices and DC's rebates are on water heater repair in Washington, DC.

Help paying for plumbing repairs in DC

• Leak assessment and repair (RLAAP and RLRAP). DC Water sends a licensed plumber for a no-cost leak assessment and, if funds are available, an approved plumber makes the repair at no cost. You must be enrolled in CAP+, CAP1 or CAP2 and have received a high usage or consecutive usage alert. Call 202-354-3600.
• Customer Assistance Program. Monthly discounts of about $18 to $131 on the water bill ($218 to $1,572 a year). Apply through DOEE, (202) 350-9649.
• Lead pipe replacement (LPRAP). DC Water offers free or discounted replacement of the private side of a lead service line, up to a 100% discount for eligible homeowners.
• DHCD home repair (SFRRP). Roofing grants that also cover related plumbing work, plus emergency utility repairs approved by the DHCD Director. (202) 442-7200.

Local rules, programs, contacts and climate for Washington, DC, from the official, utility, Census and NOAA pages listed under Sources.

Permits and licenses for plumbing work in DC

DC requires a permit for most plumbing work: Angi's DC guide says the Department of Buildings wants permits for virtually all plumbing projects that modify or extend existing systems, and DOB lists new and replacement gas appliances as permit work. DOB says only licensed DC contractors for the specific trade may apply for trade permits, and a plumbing fixture permit costs $26 for the first fixture and $20 for each additional one. Historic homes may face stricter permit rules, Angi adds.

DC is its own licensing jurisdiction, with no state layer. Ask for the plumber's DC license number and check it with the Department of Licensing and Consumer Protection (DLCP); ask for proof of insurance as well. DOB's line is (202) 671-3500.

More home repair help in Washington, DC

Water already in floors or ceilings? See water damage restoration in Washington, DC, and for a musty basement, mold removal in Washington, DC. Heat and AC are on HVAC repair in Washington, DC. Compare plumbers in Philadelphia and plumbers in Boston. Prices for every trade are in home repair costs, and how calls work explains the line: calls go to an independent company that serves your area and takes this kind of job.

More home repair help in Washington, DC: roof repair, roof replacement, electrical work, tree removal and garage door repair, with prices, the local rules and the line to call for each.