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Signs of a Leaking Sewer Line in the Yard

A broken sewer lateral leaks wastewater into the soil between your house and the street. The yard usually shows it first: a soggy or sunken strip, grass that's greener than the rest of the lawn, or a sewage smell outdoors, often along with slow drains inside.

A camera inspection ($125–$500) confirms where the pipe failed. Lateral repairs typically run $1,100–$4,100, and a full replacement $3,000–$15,000 depending on method and what's above the line.

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Step 2 of 3The details

Where is it, and what's going on?

Sewer Camera Inspection · Emergency — sewage backing up now

Free · No obligation · Independent local pros

What to do in the first 5 minutes

  1. Walk the line's likely path from the cleanout toward the street and note wet, sunken or unusually green spots.
  2. Keep people and pets off soggy areas; the water can contain sewage.
  3. Cut back water use, especially laundry and long showers, to limit how much leaks into the ground.
  4. Find your cleanout and your property line; whose pipe it is decides who pays.
  5. Book a sewer camera inspection before agreeing to any digging or lining quote.
Side view of a front yard with the sewer lateral running from the house toward the street. A crack in the buried pipe leaks wastewater into the surrounding soil. Above it, the grass grows taller and greener in a strip along the pipe, the ground has sunk where soil washed away into a void, a soggy wet patch sits on the surface, and odor lines rise from it.
A leaking lateral shows up in the yard: a greener strip of grass, a soggy or sunken spot along the line's path, or a sewage smell outside. A camera inspection confirms where the pipe failed.

Do not do this

  • Don't dig toward the pipe yourself; call 811 first, since gas, power and water lines often share the route.
  • Stay off a sinkhole or sunken area; soil washed out by a leak can give way.
  • Don't let children play in wet spots along the line.
  • Don't ignore a sewage smell indoors; dry traps are harmless, but a broken drain under the house is not.

What's likely going on

Root intrusion

Roots open joints in clay and older pipe, then leaks feed the roots. Lining or replacing the damaged section is the long-term fix.

Cracked or corroded pipe

Clay cracks with age and soil movement, and cast iron rusts from the inside until it splits.

Separated joint or bellied section

Settling soil can pull joints apart or create a sag that holds water and leaks at the low point.

Collapsed Orangeburg or failed old pipe

Fiber pipe from the mid-1900s deforms and collapses, and usually needs replacement rather than lining.

Five cutaway sections of a buried sewer pipe, each showing a common defect: tree roots growing in through a joint, an offset joint where one section has shifted down, a belly where the pipe sags and holds standing water, a crack in the pipe wall next to a collapsed section filled with soil, and grease coating the inside walls and narrowing the pipe. Beside each is the usual fix.
The failures behind most yard leaks: roots opening a joint, cracks, separated joints, bellies and collapsed old pipe.

Diagnose it now

What it typically costs

A camera inspection typically runs $125–$500. Lateral repairs run $1,100–$4,100 (Angi), and full replacement $3,000–$15,000 depending on method and surface (HomeGuide); trenchless lining runs $80–$250 per foot (Angi; HomeGuide and HomeAdvisor list $90–$250).

Frequently Asked Questions

What does a sewer leak in the yard look like?

Look for a soggy or sunken strip along the line's path, grass that grows faster and greener than the rest of the lawn, or a sewage smell outside. Slow drains or gurgling inside often show up at the same time.

Is a leaking sewer line an emergency?

It's urgent rather than an emergency, unless sewage is backing up indoors or the ground is sinking. Get a camera inspection soon, because leaks wash out soil and get worse.

Can a leaking sewer line be fixed without digging up the yard?

Often. If the pipe still holds its shape, cured-in-place lining can seal cracks and joints from the inside. A collapsed section usually needs pipe bursting or a short dig.

Who is responsible for a sewer leak in my yard?

In most cities the homeowner owns the lateral on private property, and some cities assign the whole run to the main. Our responsibility checker walks through the common rules.

The service that handles this

Sewer Camera Inspection

Guidance only — independent local providers assess and price their own work. Last reviewed: October 28, 2026.

Sources for the cost figures

  • Angi: Sewer line replacement or repair costs (updated Jul 9, 2026) (third-party estimate)
  • HomeGuide: Sewer line repair and replacement cost (2026) (third-party estimate)
  • HomeAdvisor: Sewer main installation and replacement cost (2026) (third-party estimate)

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