Cary Foundation Repair Permits

Foundation repair in Cary almost always involves the Town's Inspections and Permits staff. The Town's residential permits FAQ is blunt that a permit is required for most work on a structure, and it lists foundation repairs specifically. Because structural foundation work in North Carolina also falls under the engineering licensing law, most projects involve an engineer as well as a contractor.

This guide explains the pieces of the process and who is responsible for each.

When a permit is required

Cary's FAQ quotes the North Carolina State Building Code: no person may erect, construct, enlarge, alter, repair, move, improve, remove, convert or demolish any building or structure without first obtaining a permit. Foundation repairs and closing a crawl space are both on the Town's list of residential projects needing a permit. Starting without one can lead to stop work orders and problems when you sell.

The engineer's role

North Carolina's engineering law, G.S. 89C, defines engineering practice, and the NC Board of Examiners for Engineers and Surveyors has published foundation repair guidelines explaining how it applies. A Professional Engineer must be in responsible charge from the start: the preliminary analysis, the number and location of piers, the repair design, and the final certification of completion. Companies that evaluate a foundation and recommend repairs need a licensed engineer and engineering firm, or must use an independent licensed firm.

For permitting, Cary may require an engineer's stamped, site-specific design or report when the repair is not covered by the prescriptive code.

As-built surveys

Under Cary's Land Development Ordinance §3.14.2(D), residential structures generally require a sealed as-built foundation survey by an NC-registered land surveyor. Exceptions include buildings five feet or more from any required setback line, buffer or easement, structures not needing a permit, and cases where an accurate existing survey lets inspectors confirm locations. Repairs to an existing house often fall under an exception, but confirm with the Town.

Contractor licensing

Under G.S. 87-1, anyone who undertakes construction where the cost is $40,000 or more must be a licensed general contractor. Many foundation projects fall below that number, but larger underpinning jobs may not. Ask for license numbers and verify them with the licensing board, and confirm liability insurance.

A typical sequence

Most projects go: evaluation by a PE, a written repair design, contractor bids based on that design, permit application, installation with inspections, and a final letter from the engineer certifying the work. Keep all reports, permits and the engineer's final letter; buyers and inspectors will ask for them.

Foundation repair cost estimates

Sources: Angi: Foundation repair cost (2026); Angi: Underpinning cost (2026). Figures are published national or regional estimates compiled by those sites, labeled as estimates; they are not quotes and not prices from any provider on this site. Engineering evaluations, permits and as-built surveys are usually priced separately.

Local rules and code references

• Town of Cary Residential Permits & Inspections FAQ: lists foundation repairs, and closing or sealing a crawl space, among residential projects that require a building permit, quoting the NC State Building Code requirement to obtain a permit before altering or repairing a structure.
• Town of Cary Land Development Ordinance §3.14.2(D), as-built foundation surveys: sealed as-built foundation survey by an NC-registered land surveyor for residential structures, with exceptions such as buildings five feet or more from any setback line, buffer or easement.
• N.C. Gen. Stat. §89C-3 (definitions, practice of engineering): defines the practice of engineering that, in foundation work, must be performed by or under a licensed Professional Engineer.
• N.C. Gen. Stat. §87-1 (general contractor defined): a person or firm undertaking construction where the cost is $40,000 or more must be a licensed general contractor.
• NC Board of Examiners for Engineers and Surveyors, Foundation Repair Guidelines (rev. 10/22/2024): state board guidance: a PE must be in responsible charge of foundation evaluation, pier count and location, repair design and completion certification.

Code text and department procedures change; confirm current requirements with the jurisdiction before work starts.

Related local guides

• Cary Foundation Settlement Repair Cost
• Cary Helical Pier Cost
• Cary Crawl Space Encapsulation Cost