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Foundation repair vs pouring a new slab

The foundations and slabs category covers new construction and slab work broadly, but does not separate two distinct buyer situations: repairing or reinforcing an existing foundation versus pouring a brand new slab (for an addition, shed, garage, or similar structure).

Repair work deals with cracking, settling, or moisture issues in a foundation that is already in place, often involving piers, underpinning, or crack injection. New slab work is a ground-up pour: excavation, forms, rebar or mesh, and a fresh cure. Buyers searching for one rarely want the other, and the crews, equipment, and permitting can differ.

  • Assessment of whether foundation movement is active or stabilized before repair
  • New slab scope including excavation, forming, and reinforcement for additions or outbuildings
  • Permit and inspection guidance, since new slabs for structures often require permits that a patch repair does not

What it costs

Foundation repair pricing depends on the method (crack injection, piering, underpinning) and how much of the foundation is affected. New slab pours are priced by square footage and thickness, plus excavation and site prep. A new slab for a garage or addition typically costs more up front than a repair, but repair costs can climb fast if structural stabilization work is needed.

Top 3 by our score

Ranked from our published scoring of public Google reviews for foundations & slabs.

  1. 1. Crawl Space Brothers
    5.0★ · 311 reviews
    91
  2. 87
  3. 88

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FAQ

How do I know if it's a foundation problem versus a slab I need poured new?
If you have an existing structure with cracking, settling, or moisture issues, that's foundation repair. If you're adding a shed, garage, or extension and need concrete where there currently is none, that's a new slab pour.
Does foundation repair require permits in Charlotte Metro?
Structural foundation work often does depending on scope, while a new slab for an addition or accessory structure typically needs a permit. A licensed contractor can confirm what applies to your specific job.
Can a new slab be poured next to an existing foundation without affecting it?
Yes, when done correctly with proper excavation and consideration of grading and drainage, though a contractor should evaluate the site to avoid undermining the existing structure.