Skip to content
NoVA & DC Plumbing Map

Job · Sewer lateral repair

Sewer lateral repair: who pays, who permits

Full map

The sewer lateral is usually the owner's to repair, from the house to the main, and a licensed plumber or contractor does it; call the sewer authority first when you think the main is the problem.

Revised November 3, 2026 · who makes this map

Open narrow trench across a front yard with new sewer pipe and marked lawn
A lateral trench across a front yard, with utility paint on the grass. Licensed contractors only. AI-generated picture.
Where this differs
PlaceWhat happens thereTurn to
DCDC Water checks the main first. If it is clear, you must hire a registered master plumber to clear the lateral at your expense, and the plumber reports to DC Water if the block is in the public portion.Sheet 3
ArlingtonArlington's crews clear the main free, and the county prefers a call to 703-228-6555 before you hire anyone. Its code makes the lateral the owner's.Sheet 7
AlexandriaOwnership depends on install date, before or after July 1, 1955. The city is also inspecting and rehabilitating city-owned portions of laterals under its Sanitary Sewer Asset Renewal program, starting in Del Ray.Sheet 9
Unincorporated Fairfax CountyYou own the whole lateral, including under easements and roads. Repairs need a county plumbing permit, plus a VDOT permit in state right of way.Sheet 17
City of FairfaxCity code makes you responsible to the main, but a repair program reimburses part of the cost. The city's own pages give different caps, so ask which applies.Sheet 16
City of Falls ChurchThe City's fee page lists a sewer repair plumbing permit at $91.50 from July 1, 2026. We could not confirm who owns the lateral; ask the Building Safety Division.Sheet 11

What a lateral is

The lateral is the pipe that carries waste from your house to the sewer main in the street. It is out of sight, so failures show up as slow drains in more than one fixture, gurgling, odors, or sewage coming up in the lowest drain in the house. A single clogged sink is usually a fixture problem. Sewage coming up when no one is using water is a sign the trouble may be in the main.

If sewage is coming up right now, go to basement backups before you read further.

Black and white archive photograph of workers beside a deep sewer trench in a street
A sewer trench in a town street in the 1940s, from a Massachusetts public-works album. Deep work has always been a job for crews.

The first call

Fairfax County asks you to call its 24-hour Customer Communications Center at 703-323-1211 before a plumber when you think the main is the problem. A crew checks the county line. If the county line is running normally, the county tells you to call a plumber. DC Water works the same way through its emergency line, 202-612-3400. Arlington asks for 703-228-6555. In Alexandria and the other towns, start with the public works or utilities office named on your bill or on the ownership page.

Making that call costs nothing and keeps you from paying for a repair on pipe the public system should handle.

Common causes

DC Water lists settling soil, joints that have come out of line, root infiltration, collapses and grease. Fairfax County adds wipes labeled flushable, cloth, hair and food waste. Roots enter through open joints and cracks and can break the line over time. Fairfax County's page says replacing the line with new plastic pipe is one way to stop roots coming in, and that if a plumber clears roots you should tell the county so it can clean its main as well. Street trees are covered on roots and street trees.

Who does the work

Digging a lateral is work for a licensed contractor. Trenches collapse, and sewage is a health hazard. Do not dig it yourself. Virginia 811 asks for notice three days before digging, and DC digging goes through Miss Utility; the lines it marks are approximate. For a check on credentials, see how to check a license.

In DC the plumber must hold a master plumber's registration. In Virginia, the state's three contractor classes are set by job value, from Class C at the low end to Class A at $150,000 and up. Plumbing is a specialty on the license application.

A plumber may suggest adding an accessible cleanout, which gives a clear point to reach the line later: cleanouts and plugs at PlumbingSupplyAndMore (that store has the same owners as this map).

Permits

Fairfax County says repairs to a lateral need a plumbing permit and, if the work is in state right of way, a VDOT permit. Property owners may pull a permit in their own name, but the county strongly recommends a licensed contractor pull it. Falls Church lists a fee for a sewer repair plumbing permit and a Sanitary Sewer Service Application. Permits by place lists the permitting office for each jurisdiction.

Who pays, and what helps

Cost is yours in nearly every case, and we do not give prices because we cannot source any. What can ease it:

  • City of Fairfax: a reimbursement program paid for by an $18 yearly residential charge. Two city pages give different caps (25 percent up to $3,250 for the private side only and 75 percent up to $6,500 for the full lateral, against 25 percent up to $2,500). Ask the city which is current.
  • Alexandria: the city inspects and rehabilitates city-owned portions of laterals in Del Ray and plans work for Old Town. A project at your block is worth asking about before you hire anyone.
  • Insurance: Fairfax County says a standard homeowners policy does not cover the lateral; service line coverage is optional. DC Water suggests a rider for backup cleanup.

DC Water usually declines cleanup and damage costs. If you have information pointing to DC Water, call 202-787-2052 or file a claim at www.dcwater.com/claims, knowing an investigation comes first.

For an example of what a plumbing company lists about its services, here is one in Pennsylvania, outside this map, so not someone to hire here: a plumbing company's service page at Central Plumbing (that company is connected to the team behind this map).

Check your own address

  1. Ask the sewer authority whether a crew has inspected the main at your address, and get the answer in writing or by email reply.
  2. Ask a licensed plumber to run a camera through the lateral and show you the footage before you agree to a repair.
  3. Get the permit number in your name or the contractor's, and keep the final inspection record.
  4. Read your homeowners policy for sewer backup and service line coverage before work starts.
  5. Call 811 before anyone digs, and let your contractor confirm it was done.

More on checking an address

Survey notes: sources for this page