How Long Does It Take to Replace a Sewer Line?

Quick Answer

Replacing a sewer line takes 1–5 days, with the method being the primary factor. Trenchless techniques (pipe bursting or pipe lining) can be completed in 1–2 days with minimal excavation. Traditional open-trench replacement typically takes 3–5 days and involves digging up the entire length of the old pipe. Complex situations — such as lines under driveways, trees, or city streets — can extend the project to a week or more.

Trenchless vs. Traditional Comparison

Factor	Trenchless (Pipe Bursting)	Trenchless (Pipe Lining/CIPP)	Traditional (Open Trench)
Duration	1–2 days	1–2 days	3–5 days
Excavation needed	Two small access pits	One or two access points	Full trench along pipe
Yard damage	Minimal	Minimal	Significant
Cost	$6,000–$12,000	$4,000–$10,000	$4,000–$15,000
Works for collapsed pipes?	Yes	No	Yes
Works for offset/bellied pipes?	Yes	No	Yes
New pipe material	HDPE	Epoxy-coated liner	PVC, ABS, or cast iron
Pipe diameter change	Same or larger	Slightly smaller	Any size
Typical lifespan	50+ years	50+ years	50–100 years

Day-by-Day Timeline: Traditional Replacement

Day	Activity
Day 1	Camera inspection, locate utilities (call 811), mark dig path
Day 1–2	Excavate trench (3–6 feet deep, entire pipe length)
Day 2–3	Remove old pipe, grade trench bottom
Day 3–4	Install new pipe (PVC or ABS), connect to house and city main
Day 4–5	Backfill, compact soil, restore landscaping, city inspection

Day-by-Day Timeline: Trenchless Pipe Bursting

Day	Activity
Day 1 (morning)	Camera inspection, locate access points, dig two small pits
Day 1 (afternoon)	Pull bursting head through old pipe, simultaneously pull new HDPE pipe
Day 2 (morning)	Connect new pipe to house plumbing and city connection
Day 2 (afternoon)	Camera verify new pipe, backfill access pits, city inspection

Factors That Extend the Timeline

Pipe depth is the biggest variable. Standard residential sewer lines are 3–6 feet deep, but in colder climates or hilly terrain, pipes may be 8–12 feet deep. Deeper pipes require more excavation time and possibly shoring for trench safety, adding 1–2 days.

Pipe length matters proportionally. A typical residential sewer line is 50–100 feet from house to street. Lines over 100 feet take longer regardless of method.

Obstructions such as mature tree roots, concrete driveways, sidewalks, or other utility crossings can add significant time. Cutting and replacing a section of driveway alone adds half a day to a full day.

Permits and inspections are required in virtually all jurisdictions. Most cities require a plumbing permit and a final inspection before backfilling. Permit processing takes 1–5 business days, and scheduling an inspector can add another 1–2 days of waiting.

City-side connection requirements vary. Some municipalities require their own crew to make the final connection at the city main, which may need to be scheduled separately.

Signs You Need Sewer Line Replacement

• Recurring backups in multiple drains
• Sewage odors in the yard
• Sinkholes or soggy spots along the sewer line path
• Tree root intrusion visible on camera inspection
• Orangeburg (bituminous fiber) or clay pipe that has deteriorated
• Camera inspection showing cracks, offsets, or bellies

Cost vs. Time Trade-Off

Trenchless methods are often comparable in cost to traditional replacement but save significant time and landscape restoration expense. However, trenchless is not always an option — collapsed pipes, severe bellies, or back-pitched sections typically require traditional excavation. A camera inspection (usually $150–$500) determines which method is viable before any digging begins.

What to Expect During the Process

During replacement, the home's sewer service will be interrupted. For traditional replacement, this means 1–3 days without sewer service. For trenchless methods, the interruption is typically 4–8 hours. Plan accordingly — some contractors provide portable toilet facilities for multi-day projects.