Document the condition
Track where the problem appears, roughly when it began, any tie to weather or drainage, and prior work at the property. Photos plus rough measurements make the first Durham conversation more productive.
Read the local context
Two records and one observation make the first conversation far more productive. Find out roughly when the house was built, because the era determines whether you are looking at brick piers, block walls or engineered fill, and each fails in its own way. Note whether the symptoms change with the season, since clay-driven movement here opens in one part of the year and closes in another. And walk the outside after heavy rain to see where water actually collects against the structure -- that is usually where the explanation is, rather than at the crack itself.
Ask what will be hidden
Cracks and sticking doors are clues, not diagnoses. Drainage tie-ins and prep work on a Durham lot vanish once the yard is put back together, so get them described in writing beforehand.
Compare complete scopes
Set Durham proposals side by side on protection, access, materials, permits, testing, cleanup, restoration, exclusions, warranties, and change-order rules before deciding.
What official local sources add
Flood status is the record that matters here. Structural repair inside mapped floodplain can engage additional requirements depending on the cost of work relative to the structure's value, and excavation for exterior drainage can run into stream buffers. Designation reaches structural work only where it becomes visible. Beneath the regulation, Piedmont red clay is the mechanism: it swells when wet and shrinks when dry, so movement here is frequently seasonal rather than progressive and worth measuring across a full cycle before committing to piers.
Sources were reviewed June 20, 2026. Durham property owners should confirm parcel-specific expansive-soil conditions, historic-district status, and permit requirements with the relevant authority before work is authorized.