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NTA Services

NTA is a third party service provider to a wide range of industries. NTA’s complete line of services are available to all of our clients; CAD, building product testing, inspection services, certification programs, plan review, structural engineering, or any other of our accredited services! NTA offers the solutions you need to achieve your goals of safety, integrity and quality.



The NTA test lab (view our Testing Accreditation) provides the experience and analysis of the results you need to give your building product credibility with both consumers and regulatory agencies.



Our engineers have multiple certifications and can provide you with complete structural engineering in accordance with adopted building codes to reduce construction cost and improve constructability.

CAD Services


Our CAD Technicians have many of the same certifications and training that our plan reviewers have, which means you get all the expertise you expect from an NTA Plan Reviewer, but for your drawings and designs. We can also help with RV Plan Review and Approvals!



Our product testing, inspection and certification programs provide evidence of a building product‘s compliance to standards, conformity to code and in–plant verification of quality programs. View our Certification Accreditation.

Code Analysis

Plan Review

With over 30 years of experience, NTA's staff of P.E.'s provides a wide range of plan review and approval services in all 50 states and parts of Canada, regardless of the model code.

Quality Audit


NTA is the third party of choice for residential and commercial housing inspection because of our consistent ability to deliver quality audits and inspections by knowledgeable personnel. View our Inspection Accreditation.

Expert Witness

Expert Witness

NTA understands how important it is to have a nationally recognized third party available to testify in a pending lawsuit. We are experienced in site inspection, report preparation, expert testimony, mediation, arbitration and jury trial participation.