Foundation Repair Listings
The Foundation Repair Authority listings database covers contractors, inspectors, engineers, and specialty service providers operating within the US foundation repair sector. Listings are drawn from verifiable business registrations, state licensing records, and professional credential databases. Understanding what this directory includes, how entries are verified, and where gaps exist supports accurate use of the resource.
What listings include and exclude
Listings within this directory represent businesses and licensed professionals who provide services directly related to structural foundation assessment, repair, stabilization, and related subgrade work. Covered service categories include pier and beam repair contractors, helical and push pier installation specialists, slab lifting and mudjacking operators, waterproofing contractors working at the foundation perimeter, structural engineers offering foundation-specific assessment services, and geotechnical consultants.
Listings reference the Foundation Repair Directory Purpose and Scope for jurisdictional boundaries and service category definitions. The directory is scoped to the contiguous 48 states and does not extend to US territories, Alaska, or Hawaii at this time due to licensing data coverage limitations.
Excluded from listings:
- General contractors who perform foundation work only incidentally (less than 20% of declared business activity)
- Unlicensed or unregistered operators without a verifiable state contractor license or professional engineer (PE) credential
- Businesses whose primary activity is new construction rather than repair or remediation
- Suppliers and material manufacturers not directly delivering field services
- Home inspectors whose scope does not include structural foundation-specific assessment
The directory does not function as a rating or review platform. No star ratings, consumer reviews, or endorsement signals are attached to individual listings. The purpose is accurate sector mapping, not comparative ranking.
Verification status
Entries carry one of three verification classifications:
Confirmed Active — The business or professional record has been cross-referenced against at least one state licensing board database or secretary of state business registration within the prior 24-month data cycle. License number, business address, and service category have been validated.
Pending Review — The listing has been submitted or flagged for inclusion but has not completed cross-referencing. State license status is unconfirmed. These entries are labeled distinctly and should not be treated as fully validated.
Historical Record — A business or professional license that appeared in prior data cycles but cannot be confirmed as currently active. These entries are retained for reference continuity but are marked inactive.
Structural engineers and geotechnical consultants listed are cross-referenced against the National Council of Examiners for Engineering and Surveying (NCEES) licensure framework and state PE board records where accessible. The International Code Council (ICC) publishes model codes, including IRC Chapter 4, which governs foundation construction standards and defines the technical scope within which listed contractors operate. Contractor licensing standards themselves are administered at the state level — there is no single federal contractor licensing body for foundation repair work, meaning verification must be conducted against 50 separate state licensing authorities.
Coverage gaps
Fourteen states do not maintain a publicly accessible, searchable contractor license database at the state level, which limits automated verification for businesses registered in those jurisdictions. Coverage in those states relies on county-level registration records and business entity filings rather than trade-specific licensing data.
Foundation repair work in seismic zones — defined under ASCE 7 and referenced by the ICC in IRC Section R403 — requires engineering oversight beyond standard repair contractor credentials. The listing base in high-seismic-risk regions (notably California, Oregon, Washington, and Alaska's exclusion zone) reflects fewer entries due to the stricter PE involvement requirements that reduce the number of standalone contractor operations.
Rural and frontier markets — generally defined as counties with population density below 6 persons per square mile by US Census classification — represent persistent gaps. These areas have lower licensed contractor density and higher rates of unregistered operators. Listings for these geographies are incomplete relative to urban and suburban markets.
The waterproofing subcategory presents definitional gaps. Contractors who install interior drainage systems or vapor barriers may operate under general contractor, specialty contractor, or no trade-specific license depending on state law, creating inconsistent classification across state lines. For detail on how the resource handles definitional boundaries, see How to Use This Foundation Repair Resource.
Listing categories
Listings are organized into four primary professional categories, with subcategories that reflect the distinct licensing and qualification requirements associated with each service type.
Category 1 — Foundation Repair Contractors
Subcategories: pier and beam, concrete slab repair, helical pier installation, push pier installation, mudjacking and polyjacking, and crack injection specialists. These operators hold state contractor licenses; required license class varies by state from general residential contractor to specialty structural contractor.
Category 2 — Structural and Geotechnical Engineers
Licensed professional engineers (PEs) with demonstrated competency in geotechnical or structural disciplines. PE licensure is required by statute in all 50 states for engineering services offered to the public. Listings in this category are filtered to exclude engineers whose declared scope excludes foundation-specific services.
Category 3 — Foundation Inspectors
Home inspectors and building inspectors with documented foundation assessment scope. The American Society of Home Inspectors (ASHI) and InterNACHI both publish standards of practice that define foundation inspection scope. State licensing for home inspectors applies in 38 states as of the most recent ASHI state regulation summary.
Category 4 — Specialty Waterproofing and Drainage Contractors
Contractors focused on foundation perimeter waterproofing, interior drainage systems, crawl space encapsulation, and sump system installation. The US Department of Energy's Building America program recognizes encapsulated crawl space systems as a distinct building science intervention, and contractors in this subcategory are classified separately from general waterproofing trades.
Full listing records for each category, including license numbers, service geographies, and verification status, are accessible through the Foundation Repair Listings search interface.