National Foundation Authority is an information and reference resource focused on foundation systems in the built environment. It organizes guidance for homeowners, construction professionals, and others seeking to understand foundation design, performance, maintenance, and repair. Its coverage spans residential and commercial foundations, including slab, crawl space, basement, pier-and-beam, mat, helical pier, and drilled pier systems.

The site explains common foundation problems, such as cracking, settlement, expansive-soil damage, and bowing basement walls, alongside repair and strengthening approaches including underpinning, wall anchors, carbon fiber straps, and concrete or foam lifting. It also addresses costs, insurance coverage, warranties, waterproofing, drainage, and the implications of foundation issues during a home sale.

Planning and compliance resources cover geotechnical design, load-bearing capacity, soil and site conditions, frost depth, flood zones, seismic considerations, permits, inspections, and building codes. The authority also provides guidance on inspections, choosing contractors, and understanding engineering professionals and industry credentials. Additional site features include code references, provider listings, sourced articles, official feeds, editorial standards, corrections, and reader contribution information.