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Water & Sewer Line Trenching

Trenches for new or replacement water and sewer services, from the house to the municipal connection or to your own well and septic.

$65 - $250 per machine hour with operator Often a day or two of digging; the municipal permit and inspection set the real schedule

No published New Brunswick trenching prices turned up. Machine time is the best-published price: about $65 to $150 for a mini excavator with operator and $150 to $250 for a standard machine (national and Atlantic guides, September 2026).

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About Water & Sewer Line Trenching

A water or sewer trench looks simple and is not: it has to be deep enough, it has to cross whatever else is buried in the yard, and in most New Brunswick towns the connection itself is a municipal permit with its own rules.

The rules change by town, so check yours. In Fredericton, new water and sewer services are installed by the City's Water & Sewer Division, a site servicing plan goes in with the building permit, and the owner pays once the work is done. Saint John requires a permit for all new, renewal or repair water, sanitary and storm sewer installations. Quispamsis charges a residential water meter connection fee and a sewer connection fee.

Riverview says a permit may be required to tap into water and sewer mains. Moncton lists water and sewer connections as a roadwork and utility permit. Who is allowed to dig which side of the property line was not published for any of these towns, so ask your municipality before you hire.

Locates come first. Book Info-Excavation (3 working days' notice) and NB Power separately (five business days). Private lines you or a past owner put in are not marked by NB Power.

Any trench 1.2 m or deeper that a worker enters must be shored, sloped or benched, or cut in solid rock, under WorkSafeNB's Regulation 91-191, and a worker on the surface must be able to see anyone working in the trench.

No published New Brunswick trenching prices turned up. Machine time is the best-published price: published rates run about $65 to $150 an hour for a mini excavator with operator and $150 to $250 for a standard machine.

What This Work Covers

  • New and replacement water service trenches
  • Sewer lateral trenches to the municipal connection
  • Lines to a private well or septic tank
  • Trench shoring, sloping or benching where workers enter
  • Backfill and surface clean-up

Ready to Get Started?

Tell us about your water & sewer line trenching job and we'll send it to local excavation contractors in New Brunswick. They reply by email.

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