The ICC NTA Story, A History of Quality

ICC NTA is a member of the International Code Council (ICC) family of solutions. The Code Council family of solutions includes the ICC Evaluation Service (ICC-ES), S.K. Ghosh Associates, the Solar Rating & Certification Corporation (ICC-SRCC), the International Accreditation Service (IAS), General Code, NTA (ICC-NTA), and Alliance for National & Community Resilience (ANCR), which are dedicated to the construction of safe, sustainable, affordable and resilient structures.

As an accredited third-party agency, NTA provides code evaluation, product certification, inspection, engineering, plan review, and testing services, as well as independent quality and standards compliance verification for building product manufacturers. With offices, testing labs, and training facilities in both Nappanee, Indiana, and Bryan Texas, NTA serves residential and commercial builders, code officials, manufacturers, and suppliers throughout the building industry.

Why We Are Here

NTA cares about public safety, the “American Dream”, and the chance to own a safe, affordable, efficient home. We strive for “American Made” to be synonymous with “High Quality”. We are known for our expertise, our responsiveness, and most of all our trustworthiness. When our services allow clients to succeed in a way that achieves respect, brand loyalty, and success, we know we’ve made a difference. See what clients are saying about NTA.

What We Do — Third-Party Testing, Inspection, Code Evaluation, Certification, and Plan Review

NTA serves our clients with nationally recognized and accredited, third-party testing laboratories that assist in the development of new and innovative products. We’re proud that our laboratories and product certification services are accredited by A2LA. We give unparalleled personal attention during each phase of every project, from code evaluation and inspection through certification. Our network of quality auditors are located throughout the US and Canada, which allows us to meet the needs of all clients, no matter how challenging the product or environment. And because we know that time is of the essence when testing or inspection services are required, we strive to serve your needs in a timely manner. Quotes are usually issued in days, not weeks. Testing is often completed in weeks, not months and testing reports are typically issued within two days of test completion.

NTA maintains one of the largest manufacturing inspection workforces in the market. Our inspection professionals have completed hundreds of building code examinations and currently hold hundreds of Code Council certifications. Our network of auditors enables us to provide review and inspection of in-plant quality control procedures, ensuring consistent quality of your product for code compliance, and if needed, help you build an entire quality program.

Thanks to our commitment to excellence, NTA has earned recognition and praise from state officials and other authorities with jurisdiction in regions throughout the country.

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NTA’s Accreditations

NTA offers services to cover Section 104.11 of the IBC, which includes Alternative Materials, Designs, and Methods of Construction and Equipment. NTA is an independent third-party agency, offering testing, code evaluation, inspection, and certification services to the building product industry and is fully accredited to the ISO 17025 (Midwest/Southwest testing laboratory), ISO 17020 (inspection body) and, ISO 17065 (certification body) standards, which all are General Requirements for Bodies Operating Product testing, inspections, and certifications, like other similar third-party agencies. This will ensure that both consumers and regulatory agencies are confident in NTA’s product testing, inspections, and certifications.

Why We’re Cutting Edge

NTA pioneered the development of the industry’s first electronic plan review software — eDAPIA. This advanced software revolutionized the process of third party design review by minimizing review turn-around time and providing electronic transfer and secure storage of documents. The eDAPIA software breakthrough saved and continues to save modular home manufacturers considerable time and money. At NTA, we continue to develop and introduce leading technology to give our clients a competitive edge.

Our History

Founded in 1976 by David R. Tompos and Dennis Norkus, NTA has long been a part of the Tompos family. David and Dennis worked hard to build a company whose name became synonymous with quality and integrity. After Dennis retired in 2002, David’s sons David A. and Eric purchased Dennis’ share of the company and dramatically expanded the services and capabilities. In mid-2019, NTA was acquired by The International Code Council and became a part of the International Code Council’s Family of Solutions.


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About the International Code Council: The International Code Council is a nonprofit association that provides a wide range of building safety solutions including product evaluation, accreditation, certification, codification, and training. It develops model codes and standards used worldwide to construct safe, sustainable, affordable, and resilient structures.


David TomposAbout David A. Tompos: David A. Tompos, LEED AP BC+D, became president and CEO of NTA and has the responsibility of the overall strategic vision and direction of the company. He also oversees all government relations, including NTA’s involvement with HUD and state agencies. David studied at Purdue University and holds a bachelor of science degree in computer and electrical engineering. After graduating in 1998, David started his career at NTA as director of testing services at the NTA Testing Laboratory. During this time, he gained a thorough understanding of manufactured housing testing procedures, inspection, product evaluation, and in-plant quality control. While serving as director of testing services, David also pioneered the development of the industry’s first electronic plan review software, eDAPIA. This advanced software revolutionized the process of third party design review by eliminating the delay in the traditional mail process and saving manufacturers considerable time and money. Before leaving the director of testing services position, David started the testing laboratory on a path to its current International Accreditation Service ISO recognition.

Eric Tompos

About Eric Tompos: Eric Tompos, PE, SE, CBO, is executive vice president of NTA. He’s a licensed civil and/or structural engineer in all 50 states. Eric has both bachelor of science and master of science degrees in civil engineering from Purdue University and is recognized as a Certified Building Official by the ICC. He has extensive experience in the design and construction of factory-built structures, building components, materials testing, and quality assurance. Eric’s current responsibilities are focused on structural design, code compliance of factory-built structures, development of policies related to NTA’s building product certification activities, and solving code compliance issues related to new and innovative building products.