NTA, Inc.: Excellence in Building Product Evaluation and Certification

Independent, third party services

Building and building product testing, inspection and certification are so important, yet they can seem so overwhelming. That’s why NTA is dedicated to providing the building industry professionals with the highest quality, third party services they need to ensure the public’s safety in the built environment.

NTA is an Approved Agency per Section 1703 of the International Building Code, and has been providing the industry with trustworthy testing, inspection and certification services for many years, giving us a history of excellence in product evaluation, code compliance and certification. Our in-depth understanding of building codes places us in a unique position to help you meet or exceed the applicable codes and regulations. From prototype testing to final certification, we are your 'one-stop-shop' for quickly getting your product to market, and with our highly rated customer service, we make the entire certification process simple, seamless and efficient - saving you valuable time and money.

Quality Audits and Inspections


NTA is the third party of choice for residential & commercial housing due to our ability to deliver inspections by knowledgeable personnel. By operating out of five regional offices nationwide, we are wherever you are.

Learn More



Our certification services are accredited by the SCC and IAS to verify a product‘s compliance to standards, conformity to code and provides verification of quality programs. View our Certificate of Accreditation.

Learn More

Testing and Evaluation

Test and Evaluate

NTA carries multiple accreditations so we can offer a ‘one–stop–shop’ for all of your product evaluation needs, from large, structural assemblies to small samples of materials (see a complete list of our credentials).

Learn More

CAD Services

CAD Services

Our CAD technicians have many of the same certifications as our plan reviewers. This expertise and knowledge means that your plans are created with code compliance in mind from the very beginning.

Learn More

Building Compliance


NTA is an industry leader in verifying that HUD, modular, residential and commercial buildings are compliant to the IRC, IBC and other standards. We provide third party plan review services in all 50 states and parts of Canada.

Learn More

Structural Engineering


NTA has licensed engineers in all 50 states, as well as Guam and the District of Columbia. Our engineering staff includes both Code Experts and P.E.’s to ensure that each client receives above and beyond customer service.

Learn More

  • IAS and SCC Accredited
  • NTA, Inc., Engineering Contractors  General, Nappanee, IN
  • Member ICC
  • MHI Member
  • Member NADRA
  • Member SIPA