If you’re new to home inspection or thinking about joining the industry, you’ve probably heard of two major names: InterNACHI and ASHI. These are the most recognized professional associations for home inspectors. Both offer education, certifications, and credibility that can give your career a serious boost.
But how do you choose between them? What’s the difference? And do you even need to pick just one?
Let’s break it all down to help with your decision.
What Is InterNACHI?
InterNACHI stands for the International Association of Certified Home Inspectors. It’s the largest home inspector association in the world, with members across the U.S., Canada, and beyond. Founded by Nick Gromicko, a former inspector and real estate pro, InterNACHI has always focused heavily on training and education.
What Does It Take to Become a Certified Professional Inspector (CPI)?
- The CPI® credential is InterNACHI’s most recognized certification. To earn it, you must:
- Pass the InterNACHI Online Inspector Exam
- Be a member of InterNACHI
- Complete a Code of Ethics course and a Standards of Practice course
- Submit four mock inspection reports
- Sign the enrollment agreement
But it doesn’t stop there. Within 12 months of joining, inspectors must complete 12 additional online courses. To stay certified, CPIs must retake and pass the InterNACHI exam (scoring 80% or better) every three years.
What Makes InterNACHI Stand Out?
- Extensive Online Training: 700+ hours of education and over 40 certification options.
- “House of Horrors” Training Centers: Real buildings with purposely built defects for hands-on learning.
- Up-to-Date Continuing Education: Required coursework helps inspectors stay sharp and informed.
- Member Benefits: From report software to marketing tools, InterNACHI membership includes a wide range of resources.
- Cost: $499/year or $49/month
What About ASHI?
ASHI, the American Society of Home Inspectors, has been around since 1976, making it the longest-running home inspection association in the U.S.
ASHI helped define the profession in its early days—its Standards of Practice influenced many of the laws and regulations we see today in various states.
How to Become an ASHI Certified Inspector (ACI)
- To earn the ASHI Certified Inspector (ACI) credential, you’ll need to:
- Pass the National Home Inspector Exam
- Submit verified inspection reports
- Complete a certain number of paid inspections
- Uphold ASHI’s Code of Ethics and Standards of Practice
ASHI has long been known for strict certification requirements, so earning that ACI badge is no small feat—and that credibility can go a long way in your local market.
ASHI’s Highlights
- Strong Chapter Support: Many local ASHI chapters meet regularly and offer mentorship, networking, and training.
- Nationally Recognized Standards: ASHI’s SOPs helped shape state-level requirements and licensing boards.
- Solid Continuing Ed Options: Including new tech trainings like drone inspection certification.
- Close-Knit Community: Their forums and regional events are especially strong for long-term members.
- Cost: $25 application fee + $449/year
NACHI vs ASHI: Which One Is Better?
Honestly, it depends on your goals, location, and learning style.
| Feature | InterNACHI | ASHI |
|---|---|---|
| Founded | 1990s | 1976 |
| Training Style | Mostly online | Online + in-person (via chapters) |
| Certification Level | CPI® | ACI |
| CE Requirements | High | High |
| Community | Large, global | Smaller, tight-knit |
| Cost | $499/year | $499/year |
Some inspectors choose to join both associations to access the full range of training, benefits, and networking. Others stick with one, depending on state requirements, regional recognition, or even personal preferences.
Why This Matters
Home inspection isn’t just about checking boxes—it’s about earning trust and helping people make informed decisions about their homes. Whether you go with InterNACHI, ASHI, or both, being a part of a respected association shows that you take your role seriously.
Pro Tip: If you’re in a state that requires licensing, check if one of these associations’ training programs meets the requirements for your jurisdiction. Some states recognize InterNACHI courses, some prefer ASHI-aligned training, and some require others.
Joining a professional association is just one step—but it’s an important one. You’ll get access to valuable tools, continuing education, peer support, and industry credibility. Whether you’re just getting started or leveling up your career, InterNACHI and ASHI both offer strong paths forward.
If you’re still unsure, start by exploring their websites, try a course or two, or attend a local chapter meeting if possible. The home inspection industry is always evolving—and the best inspectors are the ones who never stop learning.
