When you start comparing home inspectors, you will quickly run into two sets of letters: InterNACHI and ASHI. Both are national associations that certify home inspectors, publish a Standards of Practice, and require members to follow a Code of Ethics. Understanding what each one means helps you read past the marketing and judge an inspector on substance. It also helps to know how these credentials fit alongside the legal requirements here in Texas.

What the two associations are

ASHI stands for the American Society of Home Inspectors. InterNACHI stands for the International Association of Certified Home Inspectors. Each maintains its own training, testing, and ethics standards, and each lets qualified members display a credential that signals they meet those standards.

The ASHI path

ASHI's top credential is the ASHI Certified Inspector. Earning it generally requires:

  • Completing 250 paid inspections.
  • Passing the National Home Inspector Examination (NHIE), administered by the Examination Board of Professional Home Inspectors (EBPHI).
  • Submitting verified reports that meet the ASHI Standards of Practice.
  • Completing about 20 hours of continuing education per year.

ASHI's Code of Ethics places strong emphasis on avoiding conflicts of interest. For example, it discourages an inspector from performing repairs on a home they inspected, for a period of time, so the inspection stays independent.

The InterNACHI path

InterNACHI's main credential is the Certified Professional Inspector (CPI). The path generally requires:

  • Passing InterNACHI's online proctored exam.
  • Completing required course modules, including its Standards of Practice and Code of Ethics.
  • Committing to at least 24 inspections or at least 24 hours of continuing education per year.

InterNACHI puts heavy emphasis on ongoing education and transparency, which is why its members tend to take a steady stream of courses each year.

A note on the NHIE

The National Home Inspector Examination is accepted by most state licensing boards. That makes it a portable credential: an inspector who has passed it has cleared a bar that many states recognize, not just one association.

What actually matters in Texas

Here is the key point for North Texas buyers. In Texas, home inspectors are licensed and regulated by the Texas Real Estate Commission (TREC). The TREC license, not association membership, is the legal requirement to inspect a home in this state. TREC publishes its own Standards of Practice and a promulgated, standardized inspection report form that licensed inspectors must use.

ASHI or InterNACHI membership is voluntary credentialing layered on top of the state license. It can be a useful signal that an inspector invests in training and follows a national ethics code, but it never replaces the license. You can verify any Texas inspector's license directly through TREC.

How to use this when choosing

Start by confirming an active TREC license. Then treat ASHI or InterNACHI membership as a bonus that suggests added rigor and continuing education. Neither association is automatically better than the other; what counts is an active license, real experience, and a clear, thorough report. If you want a side-by-side view of local options, see our guide to the best home inspectors in DFW. One local, TREC-licensed option that carries national credentialing is Buffalo Property Inspections.