The answer to the cost of water line repair in your area depends on several factors, but you can typically expect to pay anywhere from a few hundred dollars to a few thousand dollars for the repair. The exact cost will depend on the location and extent of the damage, the materials needed, the labor required, and any additional work like landscaping or drywall repair.
It's important to get quotes from multiple licensed and insured plumbers in your local area, as they will be able to assess the specific issue and provide an accurate estimate. They can also advise you on whether a full water line replacement may be necessary, which would be more expensive than a repair.