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Question DetailsAsked on 3/10/2015

Cost to replace sewer lateral from my house to main line. I live in San Luis obispo ca

I have 2 clean outs in front yard. Muy line was scoppedand the break/ offset is where I join the cities main sewerl line

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1 Answer


You can get some ballpark round numbers for total sewer line replacement (underground, outside the house portion only - not including the in-house part) in the Plumbing link right below your question - considering the basically frost-free conditions in your area your sewer is probably about a nominal 3 feet underground (subject to drainage grade of course), but you are also in a pretty high cost area, so you should be in probably the mid to upper range of the cost ballparks - higher end if out by Morro Bay or Avila Estates/Beach area. Those ballparks assume probably about 50-75 feet of run being replaced - yours may be a lot less or more depending on whether you are in town or out in the hills.

If at the connection with the public sewer, usually they handle that for you at no cost as the junction is usually considered part of their system, not yours - they justifiably don't want contractors messing with the sewer mains, so usually the first 2-3 feet from the main sewer they handle - so check with utility first, you may get it fixed for free with just a note from the plumber/sewer contractor on where the break was located.

Otherwise, for a one-point fix like that, if not replacing the whole line due to general deterioration, $500-800 is commonly a decent ballpark with about 3 feet of digging and line repair. If the main is 8-10 feet down instead, then commonly more like $800-1200 range - the utility engineering department can tell you within a foot or so how deep the main is at your connection.

Answered 5 years ago by LCD

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