Company lists · Data refreshed September 2026

Top 25 Foundation inspection companies based in the United States

Name: Foundation inspection companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 936 companies tracked

RevenueBase identified 936 foundation inspection companies headquartered in the United States as of September 2026 and tracks 9,689 professional contacts across them, including 3,333 with verified work emails. Houston is the largest hub.

This list covers foundation inspection companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

936Companies

9,689Contacts tracked

3,333Verified emails

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The 25 largest foundation inspection companies based in the United States

Ranked by team size

Top 25 of 936 foundation inspection companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to foundation inspection companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Groundworks	Partial evidence	Virginia Beach, VA, United StatesHQ checked Sep 20, 2026	5,001-10,000	1,132 contacts →
	Partial evidence “At Groundworks, we're more than just a company; we're a national movement towards safer, more secure foundations for homes and businesses across the United States.” Source: RevenueBase Database · checked Sep 20, 2026
2	Bauer Foundation Corp	Indirect evidence	Odessa, FL, United StatesHQ checked Sep 20, 2026	201-500	475 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
3	Leighton	Partial evidence	Irvine, CA, United StatesHQ checked Sep 20, 2026	51-200	190 contacts →
	Partial evidence “Leighton, a Verdantas Company, provides environmental, geotechnical, materials testing, and special inspection services across the built community.” Source: RevenueBase Database · checked Sep 20, 2026
4	CTL Thompson	Indirect evidence	Denver, CO, United StatesHQ checked Sep 20, 2026	201-500	189 contacts →
	Indirect evidence “CTL\|Thompson (CTL\|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Source: RevenueBase Database · checked Sep 20, 2026
5	Twining, INC	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 20, 2026	201-500	178 contacts →
	Indirect evidence “Twining has continued to expand and evolve since its inception more than a century ago.” Source: RevenueBase Database · checked Sep 20, 2026
6	Aquaguard Foundation Solutions	Partial evidence	Marietta, GA, United StatesHQ checked Sep 20, 2026	1,001-5,000	123 contacts →
	Partial evidence “AquaGuard is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 20, 2026
7	Tierra, Inc. A Certerra Company	Indirect evidence	Temple Terrace, FL, United StatesHQ checked Sep 20, 2026	51-200	118 contacts →
	Indirect evidence “Established in 1992, Tierra, Inc.(Tierra) is a full-service consulting geotechnical, forensics, environmental, and construction materials testing engineering firm.” Source: RevenueBase Database · checked Sep 20, 2026
8	Foundation Recovery Systems	Partial evidence	Moberly, MO, United StatesHQ checked Sep 20, 2026	5,001-10,000	114 contacts →
	Partial evidence “Foundation Recovery Systems is proud to be part of Groundworks-North America’s leading and fastest-growing foundation and water management solutions company.” Source: RevenueBase Database · checked Sep 20, 2026
9	Olshan Foundation Repair	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	201-500	113 contacts →
	Partial evidence “Olshan Foundation Solutions is the premier provider of foundation repair, waterproofing and related services in the markets it serves across the United States.” Source: RevenueBase Database · checked Sep 20, 2026
10	Cantey Foundation Specialists	Partial evidence	Camden, SC, United StatesHQ checked Sep 20, 2026	51-200	112 contacts →
	Partial evidence “Cantey Foundation Specialists: Where expertise meets peace of mind.” Source: RevenueBase Database · checked Sep 20, 2026
11	Encorus Group	Indirect evidence	Springville, NY, United StatesHQ checked Sep 20, 2026	51-200	97 contacts →
	Indirect evidence “Encorus Group, founded in 1996, employs over 100 engineers, architects, technicians, inspectors, and support staff across New York State.” Source: RevenueBase Database · checked Sep 20, 2026
12	Ctlgroup	Indirect evidence	Mount Prospect, IL, United StatesHQ checked Sep 20, 2026	51-200	95 contacts →
	Indirect evidence “CTLGroup is a globally recognized engineering consulting and testing firm specializing in structural condition assessment, forensic engineering, and construction materials testing.” Source: RevenueBase Database · checked Sep 20, 2026
13	Alpha Foundations	Partial evidence	Monticello, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	89 contacts →
	Partial evidence “Alpha Foundations is proud to be part of Groundworks-North America’s leading and fastest-growing foundation solutions company.” Source: RevenueBase Database · checked Sep 20, 2026
14	Acculevel INC	Partial evidence	Rossville, IN, United StatesHQ checked Sep 20, 2026	201-500	87 contacts →
	Partial evidence “Acculevel is your go-to foundation expert.” Source: RevenueBase Database · checked Sep 20, 2026
15	Geotex Engineering, LLC	Indirect evidence	Collinsville, TX, United StatesHQ checked Sep 20, 2026	51-200	84 contacts →
	Indirect evidence “Geotex Engineering is an experienced North Texas engineering firm that provides geotechnical and construction materials testing services for education, municipal, water…” Source: RevenueBase Database · checked Sep 20, 2026
16	RAM Jack	Partial evidence	Ada, OK, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “Ram Jack pursues our commitment to Quality First in our foundation repair and new foundation solutions in both residential and commercial applications.” Source: RevenueBase Database · checked Sep 20, 2026
17	ELD Engineering, INC	Indirect evidence	Forney, TX, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Indirect evidence “Eric L.” Source: RevenueBase Database · checked Sep 20, 2026
18	Criterium Engineers	Indirect evidence	Freeport, ME, United StatesHQ checked Sep 20, 2026	11-50	72 contacts →
	Indirect evidence “Criterium Engineers, one of North America’s leading consulting engineering firms, helps clients better understand the buildings that they own, build, manage, or purchase.” Source: RevenueBase Database · checked Sep 20, 2026
19	Perma Pier Foundation Repair	Partial evidence	Grand Prairie, TX, United StatesHQ checked Sep 20, 2026	51-200	68 contacts →
	Partial evidence “Everything is bigger in Texas, even the foundation problems.” Source: RevenueBase Database · checked Sep 20, 2026
20	Foundation Systems Of Michigan	Partial evidence	Livonia, MI, United StatesHQ checked Sep 20, 2026	5,001-10,000	66 contacts →
	Partial evidence “Groundworks, formerly Foundation Systems of Michigan, is North America's leading provider of Foundation Repair, Crawl Space Encapsulation, Basement Waterproofing, and Concrete…” Source: RevenueBase Database · checked Sep 20, 2026
21	Greenworks Inspections & Engineering	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “About Us: GreenWorks has been serving Texas with dedication and expertise for over 15 years.” Source: RevenueBase Database · checked Sep 20, 2026
22	Protex The PT Xperts	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Partial evidence “Residential Projects – Recommendations for subdivision home foundations (individual custom lots up to lots), apartments, and condominiums from 1 to 25 stories with and without…” Source: RevenueBase Database · checked Sep 20, 2026
23	Helicon	Partial evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	51-200	59 contacts →
	Partial evidence “Helicon is Florida’s most trusted and customer-loved foundation repair company, headquartered in Tampa Bay with satellite offices across the state.” Source: RevenueBase Database · checked Sep 20, 2026
24	Pete Fowler Construction	Indirect evidence	San Clemente, CA, United StatesHQ checked Sep 20, 2026	11-50	58 contacts →
	Indirect evidence “Pete Fowler Construction Services, Inc.(PFCS) is a professional construction services provider.” Source: RevenueBase Database · checked Sep 20, 2026
25	Giles Engineering Associates, INC	Indirect evidence	Waukesha, WI, United StatesHQ checked Sep 20, 2026	51-200	56 contacts →
	Indirect evidence “Giles Engineering Associates, Inc.(Giles) is a national consulting engineering firm specializing in geotechnical (soils), environmental, subsurface exploration (drilling), and…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: foundation inspection companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names foundation inspection companies.
Partial evidence: Its own public description names part of foundation inspection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name foundation inspection companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 936 foundation inspection companies based in the United States

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Foundation inspection companies based in the United States at a glance

As of Sep 20, 2026

34.4%Verified-email coverage

10.4Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

512

11-50

318

51-200

201-500

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 936 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among foundation inspection companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “foundation inspection companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names foundation inspection companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among foundation inspection companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 3,333 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names foundation inspection companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many foundation inspection companies are there based in the United States?

RevenueBase identified 936 foundation inspection companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Groundworks, headquartered in Virginia Beach, tops this list with the largest team on record.

Which city has the most foundation inspection companies?

Houston leads with 22 headquartered companies, followed by Dallas (15) and San Antonio (14).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,333 verified decision-maker contacts tracked across these 936 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.