When you become a licensed home inspector in Oregon or Washington, your state license is the legal requirement. But most working inspectors also join a professional association. The two biggest are ASHI, the American Society of Home Inspectors, and InterNACHI, the International Association of Certified Home Inspectors. Both are well-known and both are legitimate. But they are built differently, and the right choice depends on what you are looking for as a new inspector.
What These Associations Actually Do
Both ASHI and InterNACHI set standards of practice for home inspectors, offer continuing education, provide member resources, and grant designations that inspectors can display in their marketing. Neither organization issues your state license. That comes from Oregon’s Construction Contractors Board or Washington’s Department of Licensing. The associations layer professional credentials on top of that legal foundation.
They also both publish codes of ethics, maintain inspector directories where consumers can search for members, and provide liability resources. Membership in either organization tells potential clients and referral partners that you are connected to the profession at a national level.
ASHI: American Society of Home Inspectors
Background and Reputation
ASHI was founded in 1976 and is the oldest professional association for home inspectors in the United States. It has a long-established reputation, particularly among real estate agents and consumers who have been in the industry for a while. The ASHI name carries weight with older real estate professionals who learned early in their careers to look for the ASHI logo.
Membership Levels and Requirements
ASHI has a tiered membership structure. Associate members are new inspectors who have joined but have not yet met the full membership requirements. To advance to full ASHI Member status, you must pass the NHIE exam and complete 250 paid inspections. The ASHI Certified Inspector (ACI) designation requires passing an additional ASHI exam along with inspection volume requirements.
The experience requirements mean that as a brand-new inspector, you will be an Associate for a while before you can display the full ASHI Member credential. That is worth knowing upfront.
Cost
ASHI annual dues are typically in the range of $300 to $500 per year for active membership, though dues can vary by chapter and membership level. Local chapters may have additional dues on top of national membership.
Education and Resources
ASHI offers continuing education through its online learning portal and annual conference. The education catalog is solid but smaller than InterNACHI’s. ASHI’s content tends to be more formalized and curated.
InterNACHI: International Association of Certified Home Inspectors
Background and Reputation
InterNACHI was founded in 2002 and has grown rapidly to become the largest home inspector association in the world by membership count. It is especially dominant among newer inspectors entering the field over the last decade. Many pre-licensing training programs are affiliated with InterNACHI or use its curriculum.
Membership Levels and Requirements
InterNACHI allows new inspectors to join as Certified Members after passing the InterNACHI Online Inspector Examination and agreeing to abide by their standards of practice and code of ethics. The exam is taken online and is accessible immediately after joining. There is no minimum inspection count to use the Certified Member credential from day one.
This makes InterNACHI more immediately accessible for brand-new inspectors who want to display a certification credential right away.
Cost
InterNACHI membership is around $49 per month or $499 per year. The value proposition is significant because membership includes access to their entire online course library, which contains hundreds of courses covering every inspection topic imaginable, all included at no additional cost.
Education and Resources
This is where InterNACHI genuinely stands out. Their online education library is enormous. Hundreds of courses, many with certificates of completion, cover everything from basic inspection skills to specialty areas like pool inspections, commercial inspections, infrared thermography, and wind mitigation. For a new inspector who wants to keep learning after licensing, this is a tremendous resource included in your membership fee.
InterNACHI also provides marketing templates, inspection agreement templates, business development tools, and a consumer-facing inspector directory called Find an Inspector.
Side-by-Side Comparison
| Category | ASHI | InterNACHI |
|---|---|---|
| Founded | 1976 | 2002 |
| Membership size | Smaller, established | Largest in the world |
| Annual cost (approx.) | $300 to $500 | ~$499 |
| New inspector credential available immediately? | No (Associate only) | Yes (Certified Member) |
| Full membership requirement | 250 inspections + NHIE | Online exam + agreement |
| Continuing education included? | Limited free CE | Hundreds of free courses |
| Name recognition with agents | Strong (especially older agents) | Strong and growing |
| Inspector directory | Yes | Yes |
Which One Is Better for New Inspectors?
For most new inspectors, InterNACHI offers more immediate practical value. You can display a certification credential from day one, the education library is vast, and the annual cost is comparable to ASHI. If you are hungry to keep learning after your state license is in hand, InterNACHI’s course library alone justifies the membership fee many times over.
ASHI carries a strong reputation that matters in some markets and with some real estate agents, particularly those with many years in the business. If you are building relationships in a market where experienced agents value the ASHI name, it can be worth joining in addition to or instead of InterNACHI.
Many established inspectors belong to both. Dual membership signals commitment to professionalism and satisfies agents who lean toward either organization.
What About the Certified Master Inspector Designation?
Neither ASHI nor InterNACHI awards the Certified Master Inspector (CMI) designation. The CMI is granted by the Master Inspector Certification Board and requires at least 1,000 paid inspections and 1,000 hours of continuing education. It is the highest voluntary credential available in the industry. Less than 3% of inspectors nationwide hold it.
Russ Motyko of Trusted Home Inspections holds the CMI designation along with licenses in both Oregon (OCHI #1898) and Washington (#1856). Learn more about what the CMI designation means for clients.
Related Reading
For help understanding the full licensing path in each state, see How Long It Takes to Get Licensed in Oregon and How Long It Takes to Get Licensed in Washington. To understand what the NHIE exam involves and how to prepare for it, see What Is the NHIE and How to Pass It.