ASHI and InterNACHI are the two biggest home inspector associations in the country. Both are legitimate, both are nationally recognized, and joining either one is a step in the right direction. The question isn’t which one is good and which one isn’t. It’s which one fits where you are right now.

Here’s what each one actually offers, what they cost, and how to think about the choice as someone just starting out.

What ASHI Is

ASHI stands for the American Society of Home Inspectors. It was founded in 1976, which makes it the oldest major home inspection association in the country. That history carries weight. Real estate agents who’ve been in the business for 20 years tend to recognize the ASHI name.

Getting full ASHI membership takes time. You need to complete 250 paid inspections and pass the National Home Inspector Exam (NHIE) before they’ll call you a Member. Until then, you’re an Associate. So if you join on day one, you’ll spend a year or two building toward full membership.

That barrier is intentional. It means the full ASHI designation carries real weight, and the agents and clients who know the name tend to respect it for that reason.

What InterNACHI Is

InterNACHI stands for the International Association of Certified Home Inspectors. Founded in 1994, it’s grown into the largest home inspection association in the world, with over 25,000 members.

You can join InterNACHI before you’ve done a single paid inspection. The dues are lower, and membership includes a large library of free online courses covering roofing, electrical, HVAC, foundations, mold, radon, report writing, business, and more. For new inspectors still building their knowledge base, that library is a genuine resource.

How the Two Compare Side by Side

Feature ASHI InterNACHI
Founded 1976 1994
Membership size ~6,000 members 25,000+ members
Can you join before your first inspection? Yes, as an Associate Yes, full access immediately
Full membership requirements 250 paid inspections + NHIE Pass InterNACHI online exam
Free training included Limited Hundreds of free courses
Annual cost Higher, varies by chapter ~$500/year flat
Name recognition Strong with experienced agents Strong nationally

What Your State Actually Cares About

Here’s the thing most new inspectors miss. Your state licensing board doesn’t care which association you belong to. They care that you passed the required exam, completed the required training hours, and carry proper insurance.

In Oregon, you need to pass the NHIE, complete 40 hours of approved education, and hold both E&O and general liability insurance. ASHI or InterNACHI membership is not part of the state requirement. It’s a professional credential on top of your license, not a path to get one.

Washington works the same way. The state has its own licensing requirements. Association membership matters for professional credibility and continuing education, not for getting or keeping your license. If you’re working through the licensing process in either state, these guides walk through exactly what’s required:

The exam that matters: The National Home Inspector Exam (NHIE) is required for licensure in many states, including Oregon and Washington. Both ASHI and InterNACHI prepare you for it. The exam is the same regardless of which organization you’re affiliated with. Pass the NHIE, and both associations will accept it.

How to Actually Choose

I’ve trained over 100 inspectors. I’ve taught the Fundamentals of Home Inspection course in Washington State. I’ve watched people come into this career from construction, from the military, from fields that had nothing to do with homes.

The inspectors who struggle most in year one aren’t the ones who picked the wrong association. They’re the ones who didn’t study hard enough before going out on their own. The association you join matters a lot less than what you do with the membership once you have it.

If your priority in year one is building knowledge fast on a budget, InterNACHI’s training library is hard to beat. If your local market skews toward established agents who know and respect the ASHI brand, working toward that membership from the start makes sense even if full membership takes time to earn.

Many experienced inspectors carry both. There’s nothing wrong with that, and it signals ongoing commitment to education. But you don’t have to decide everything on day one. Pick the association that fits your current situation, do the work, and add the other when it makes sense.

Neither One Makes You a Good Inspector

This is the part I want to be clear about. ASHI membership doesn’t teach you to read a house. InterNACHI membership doesn’t either.

Certifications signal effort and commitment. They don’t replace time in the field. The best thing you can do as a new inspector is get in front of as many houses as possible. Shadow experienced inspectors. Ask why things fail, not just what to flag. If you can work alongside someone who has also built homes, even better. A builder’s eye and an inspector’s eye are different, and having both is an advantage no certification can give you.

Before you commit to this career, it’s worth making sure the work is actually a good fit for you. The physical demands, the schedule, the income curve in year one, and the way you handle high-pressure client conversations all matter. Check out the inspector resources hub for guides on what the job actually looks like day to day.

Russ Motyko, Certified Master Inspector®

Russ Motyko, CMI®

Oregon City’s only Certified Master Inspector® with 12 years of Licensed General Contractor experience. I’ve trained more than 100 inspectors and taught Washington State licensing courses. When someone asks me where to start, the answer is always InterNACHI’s training library first, your state license second, and everything else after that. Oregon OCHI #1898 · Washington DOL #1856 · 2,000+ inspections completed.

For more on getting started in home inspection, including licensing guides, income expectations, and what the job actually looks like day to day, browse the inspector resources page.