Start here
Quick, low-risk steps
- Stop using water fixtures if you suspect a sewer backup.
- Keep people and pets away from any sewage or open excavation.
- Get a complete camera inspection recording with defect locations marked.
- Ask the plumber to explain the pipe material, age, and condition seen on camera.
- Request quotes that separate repair and replacement options with clear scopes.
When a Spot Repair Makes Sense
A localized repair targets a specific defect, such as a crack, offset joint, or root intrusion, while leaving the rest of the pipe in place. This can be a cost-effective choice when the surrounding pipe is in good condition and the damage is isolated. The repair method may involve digging a small pit or using trenchless techniques like pipe lining for that section.
Before agreeing to a spot repair, confirm that the rest of the line is sound. A camera inspection should show the full length of the pipe. If the pipe has multiple weak spots, is made of deteriorating material like old clay or Orangeburg, or has bellied sections, a spot repair might be a short-term fix that leads to more problems soon.
- Ask for the exact footage and location of the defect on the camera recording.
- Find out the pipe material and age to assess remaining lifespan.
- Check if the repair method requires excavation and how surface restoration is handled.
- Confirm that the repair will not create a new weak point at the connection.
When Full Replacement Is the Better Option
Full sewer line replacement involves removing the old pipe and installing a new one from the house to the city connection. This is often necessary when the pipe is collapsed, severely corroded, or has multiple failures. It also allows you to upgrade to modern materials like PVC or HDPE, which resist roots and corrosion.
Replacement can be done by traditional trenching or trenchless methods like pipe bursting. Trenchless options reduce surface disruption but may not be suitable for all situations. A full replacement typically requires permits and inspections, and you should confirm who is responsible for the portion of the line under the street or sidewalk.
- Ask if the pipe diameter is adequate for current and future needs.
- Compare trenching vs. trenchless methods and their impact on landscaping.
- Verify that the quote includes utility locating, permits, and inspections.
- Understand the warranty on materials and workmanship for the new line.
Key Factors That Influence the Decision
Several factors determine whether repair or replacement is more appropriate. The pipe material and age are critical: older materials like clay or cast iron may be near the end of their service life. The extent and pattern of damage seen on camera—such as multiple cracks, root masses, or sags—can indicate systemic issues.
Local regulations in Chicago may require replacement if the pipe is undersized or if a repair would not meet current code. The depth of the pipe and soil conditions affect the cost and feasibility of excavation. Also consider your long-term plans: if you intend to stay in the home for many years, a full replacement might offer more peace of mind.
- Review the camera footage with the plumber to understand the damage pattern.
- Ask if the pipe material is prone to future problems like root intrusion or corrosion.
- Check if Chicago code requires a specific material or diameter for replacement.
- Consider how long you plan to stay in the home when weighing costs.
Getting Quotes and Comparing Options
When you receive quotes, they should clearly separate the scope and cost for repair versus replacement. Each quote should include a detailed description of the work, materials, equipment, and timeline. Make sure the quote covers surface restoration, such as concrete or landscaping repair, which can be a significant part of the project.
Ask each contractor to explain why they recommend one approach over the other based on the camera inspection. A reputable professional will provide the recording and mark the defect locations. Do not rely on a quote that lacks a camera inspection or that pressures you into a decision without clear evidence.
- Get at least two written quotes that itemize repair and replacement options.
- Ensure the quote includes cleanup, backfill, and surface restoration.
- Ask for references from similar projects in Chicago.
- Confirm that the contractor will handle permits and schedule inspections.
Take this with you
Evidence and scope checklist
- Complete camera inspection recording with defect footage and locations
- Pipe material, diameter, and age
- Length and depth of the affected section
- Repair method and materials proposed
- Utility locate and permit requirements
- Bypass or occupancy impact during work
- Backfill and surface restoration details
- Warranty terms and exclusions
Common questions
What homeowners ask next
Can a sewer line be repaired without digging?
Yes, trenchless methods like pipe lining or pipe bursting can repair or replace a sewer line with minimal excavation. However, they are not suitable for all pipe conditions. A camera inspection will help determine if your line is a candidate.
How long does a sewer line repair last compared to replacement?
A spot repair may last many years if the surrounding pipe is sound, but it does not address aging in the rest of the line. A full replacement with modern materials can last 50 years or more. The actual lifespan depends on material, installation quality, and ground conditions.
Who is responsible for the sewer line under the street?
In Chicago, homeowners are typically responsible for the sewer lateral from the house to the main, including the portion under the street or sidewalk. However, exact responsibility can vary, so check with the City of Chicago Department of Buildings and your local alderman’s office.
Evidence
Sources used for this guide
Research checked July 31, 2026
- 811 Before You DigCommon Ground Alliance
Utility-location education before excavation; not a substitute for local permits.
- Trenching and excavation safetyOccupational Safety and Health Administration
Professional worksite safety and a strict no-entry boundary for homeowners.
- Department of BuildingsCity of Chicago
Starting point for current Chicago permits and inspections.
Optional next step
Need an on-site professional?
Use the guide and worksheet first so you can describe the situation and compare the full scope. A referral is optional; you can also contact a licensed local provider directly.
We have not enabled a provider route for this site. Use the checklist to contact and verify local providers yourself; urgent hazards should go to the appropriate emergency or public service.