A drain field fails in one of three ways: the soil is saturated because it has taken too much water for too long, the lines are blocked with solids that should have stayed in the tank, or roots and crushed pipe have cut a line off. Each has a different fix, and the first job is telling them apart before anyone digs a trench in your yard.

Repairs to a field, a tank or a pump need a county permit in North Carolina, issued after a site visit by the Environmental Health office. The crew applies, meets the inspector, and does the work the permit describes. A field that can be rested, cleaned or extended is far cheaper than one that has to be replaced, and the crew tells you which you have.

What a drain field repair job involves

Diagnosis: tank levels, distribution box, line camera and a probe of the field
Options set out, from resting the field to a partial or full repair, with a range for each
Permit application to the county, site visit with the inspector
Repair as permitted: new box, new lines, an extension, or a replacement field
Final inspection, backfill and grading, with the as-built updated

What's included

Diagnosis with camera and probe
County permit application and inspector visit
Repair to the permit, with the as-built updated
Backfill, grading and seed
A written note on how to keep the new field alive

Not in the price

County permit fees, paid directly
Landscaping beyond grading and seed
Tank replacement, quoted as its own job when needed

Repairing drain fields in Cabarrus County clay

On the county's red clay the soil is the limit. Percolation is slow, water tables rise in wet winters, and a field sized for three bedrooms in 1985 struggles under a family that runs four loads of laundry a day. Many older fields can be rescued by fixing the tank problem that caused them to clog and giving the soil months to recover; some cannot, and the county's repair permit says which options the lot allows.

Lots that have been built around since the system went in are the hard cases: there is no spare ground for a new field, and the repair permit may call for a smaller pretreatment system instead. Tight lots on the Concord and Harrisburg side are common, and the crew says early if the lot is one of them.

Drain Field Repair pricing in Concord

Diagnosis with a camera and probe runs about $250 to $500 in 2026. Distribution box and single-line repairs run $1,500 to $3,500; a partial field repair or extension $2,000 to $8,000; a full replacement field $8,000 to $20,000 depending on size, soil and whether a pump or pretreatment unit is required. Permit fees are separate and set by the county.

What moves the number: how much of the field is gone, what the soil allows, whether a pump is needed to reach usable ground, and how tight the access is. The range comes on the phone after the diagnosis; the firm number with the permit.

Full price list and what moves the price →

Drain Field Repair questions, answered

Can a drain field be saved once it is soggy?

Often, if the cause is a full tank or a clogged filter and the field has not been flooded for years. Fix the cause, pump the tank, rest the field for a season and the soil can recover. A field that has been taking solids for a decade usually cannot, and the crew says so after the probe rather than after the invoice.

How long does a repair take with the permit?

The county schedules a site visit after the application, the repair itself takes one to three days, and the final inspection follows. Plan on two to four weeks from the first call to a finished yard.

Will the yard be a mess?

A repair means a trench or two and a machine on the lawn. The crew grades and seeds afterwards, and a partial repair is usually one strip rather than the whole yard.

Drain Field Repair in Concord, NC