Trenchless Pipe Lining vs. Excavation: Costs and Pros & Cons

Two ways to fix the same broken pipe

When a sewer lateral is cracked, root-filled or corroded beyond cleaning, it needs a real repair. For most of the last century that meant digging a trench from the house to the street. Today there's often another choice: trenchless methods that rebuild or replace the pipe through small access points. Both are legitimate. The right answer depends on your pipe, your property and your priorities.

How trenchless pipe lining works

Cured-in-place pipe (CIPP) lining starts with cleaning the existing line, usually with hydro jetting, and inspecting it with a camera. A flexible tube saturated with resin is then pulled or inverted into the old pipe and inflated so it presses against the walls. Once the resin cures, it forms a smooth, jointless new pipe inside the old one. Access is typically through a cleanout or a small pit.

A related method, pipe bursting, pulls a new pipe through the old line while a bursting head splits the old pipe outward. It's useful when the line needs full replacement but you still want to avoid a long trench.

How traditional excavation works

With open-cut excavation, the crew digs a trench along the pipe's path, removes the damaged pipe, sets new pipe on properly compacted bedding at the right slope, makes the connections, and backfills. It's straightforward, proven, and lets the plumber correct problems that lining can't — like a sag or a collapsed section.

Pros and cons at a glance

What drives the cost

We avoid quoting generic prices online because two laterals on the same street can cost very different amounts to fix. The factors that actually decide the price are:

• Length of the line and how deep it sits.
• What's on top of it: lawn, a driveway, a patio, trees or a public sidewalk.
• The pipe's condition — a lineable pipe vs. one with collapses or bellies.
• Number of connections and bends.
• Access: an existing cleanout vs. needing a new access point.
• Restoration: concrete, asphalt and landscaping replacement after digging.
• Permits and any municipal requirements for work near the street.

The total-cost question

Trenchless work can carry a higher price for the pipe work itself, but it often reduces restoration costs dramatically. If your sewer line runs under a driveway, a finished patio or a mature tree, avoiding that tear-out can make trenchless the less expensive project overall. If the line runs under open lawn and has a collapse, excavation may be both necessary and economical. Comparing the full project — repair plus restoration — is what matters.

How to decide

Start with a camera inspection. It shows whether the pipe can be lined, where any collapses or sags are, and how long the damaged run is. With that information, a good plumber can price both approaches and explain the trade-offs. At City & County Plumbing and Drain we perform both trenchless repairs and excavation, so our recommendation isn't tied to the only tool we own. Call (636) 243-8881 to schedule an inspection.