Sewer Line Replacement Cost

Published averages sit below our band. Angi and HomeAdvisor both report $1,388–$5,323 with an average of $3,319, Bob Vila $1,253–$4,701 with a $2,914 average, and This Old House $1,390–$5,320. Those numbers mix short partial repairs with full runs. HomeGuide's per-length table is the honest planning tool: $2,000–$10,000 for 40 feet, $3,000–$15,000 for 60 feet, $4,000–$20,000 for 80 feet. Residential laterals typically run 50 to 75 feet, so most complete replacements land between $3,000 and $12,000 before restoration.

Trenchless vs dig: what each method costs per foot

Angi's rule for trenchless is blunt: it is not suitable for a collapsed pipe or one with the wrong slope. A liner cannot pass through a crushed section and no trenchless method fixes a belly. Angi's trenchless project range is $1,900–$6,000 with a $2,900 average, and its per-length table runs from $1,500–$8,750 for 25 to 35 feet up to $4,500–$25,000 for 75 to 100 feet. HomeAdvisor and Angi price an unavoidable excavation at $400–$1,200 per 100 feet on top of the pipe work.

What drives the price

Regional ranges

HomeAdvisor's city averages for a new sewer line show the labor and permit spread: Dallas $1,630, Miami $1,760, Chicago $2,310, Boston $2,420, Houston $2,940, New York $3,400, Detroit $3,420, Los Angeles $4,130 and Portland $4,160. Angi frames it as about $2,000 in Austin against $4,000 in Los Angeles for the same job. Bob Vila adds the climate effect: $600–$2,300 in Atlanta versus $1,800–$6,000 in Minneapolis, where lines sit below a deep frost line.

Start with the camera, not the backhoe

Every sewer job should begin with a video inspection: $125–$500 per HomeGuide, $100–$500 per Angi and HomeAdvisor. The footage tells you which of four things you have. A root intrusion at one joint is a hydro jet ($600–$1,400) and maybe a spot repair, not a replacement. A bellied section is a short excavation of that section. A cracked but round pipe is a lining candidate. A collapsed or offset pipe is a dig. ContractorRanks' 2026 warning is worth repeating: the diagnosis costs a few hundred dollars and the replacement pays thousands, so some contractors skip the camera and recommend replacement from "experience." Pay for an independent scope from a plumber who is not bidding the repair, and ask to watch the footage. On homes older than 20 years, HomeGuide notes a sewer scope adds only $100–$250 to a standard home inspection; it is the best money in the purchase.

Who pays: you, your insurer or the city

The lateral from your house to the city main is yours. In most cities that includes the section under the sidewalk and street, and HomeAdvisor notes the property owner is typically responsible for improvements on their land plus the connection fee. Cutting a public street adds a second permit layer: in Northern Virginia, for example, state road permits stack on the county plumbing permit and Arlington requires contractors to post a $5,000 street bond, which is one reason a trenchless job that starts and ends in your yard can beat a dig even at a higher per-foot rate. Call the sewer authority before you sign; some cities own the lateral from the property line out, and a few run repair programs.

Standard homeowners insurance (HO-3) excludes the underground pipe for age, wear and tree roots, which cause most failures. Angi's summary: a sudden event like a fallen tree may be covered if you can prove the pipe had no existing weakness. A sewer backup endorsement pays for cleanup inside the house ($500–$10,000 per Angi), not the pipe. Dedicated service line coverage runs $5–$15 a month through utilities and warranty companies or $30–$80 a year as an endorsement, with limits usually at $10,000 and some plans at $25,000 and deductibles from $0 to $1,000. Read the cap against the quotes above: a $10,000 limit with a $500 deductible leaves you $5,500 short on a $15,000 dig.

DIY vs pro

Sewer replacement is permitted, inspected work involving deep trenches and a live connection to a public utility. Deep trench walls need shoring, and a cave-in is lethal. Leave it to a licensed plumber or excavation contractor. What you can do yourself: rent a camera ($120–$225 a day per HomeGuide) to check a slow drain before calling anyone, keep the trench area clear, and handle the lawn and sod repair ($1–$2 per square foot installed) after backfill instead of paying the plumber's landscaping rate.