Home Inspection Services Trade Associations

American Society of Home Inspectors (ASHI)

Oldest national association for home inspectors in the U.S. offering accredited certification (NCCA), Standards of Practice/Code of Ethics, education, advocacy, and national networking via InspectionWorld and chapters. ASHI has stated it had more than 8,000 members in recent years; verify current figures directly with ASHI.

https://www.homeinspector.org/ Membership: 8,000

Association des inspecteurs en bâtiments du Québec (AIBQ)

Quebec’s largest and oldest provincial home inspection association. Sets a rigorous admissions process, requires E&O insurance and annual CE, and maintains a public inspector directory. States it has more than 400 inspector members province‑wide.

https://aibq.qc.ca/faq/ Membership: 400

Canadian Association of Home & Property Inspectors (CAHPI)

Canada’s national non‑profit voice for home inspection. Administers the CAHPI National Exam, RHI designation, continuing education, and national conferences; members inspect to CAHPI or CSA A770 standards. Provincial associations collectively represent 1,300+ members (recent estimate).

https://www.cahpi.ca/ Membership: 1,300

Canadian National Association of Certified Home Inspectors (CanNACHI)

National Canadian association offering the Certified Master Home Inspector (CMHI) designation, Standards of Practice/Code of Ethics, directory listings, and CE requirements. Its public ‘Find an Inspector’ shows ~350 certified inspectors across provinces.

https://cannachi.org/find-inspector/ Membership: 353

Certified Commercial Property Inspectors Association (CCPIA)

Largest dedicated trade association for commercial building inspectors. Provides ComSOP‑based training, certification, hands‑on classes, business resources, and a national directory. CCPIA reported 1,080 members in late 2023.

https://ccpia.org/ Membership: 1,080

California Real Estate Inspection Association (CREIA)

California’s statewide non‑profit inspector association (founded 1976). Recognized Standards of Practice in CA, 20 local chapters, robust education, advocacy, and a public directory; directory pagination indicates ~940 listed members/affiliates.

https://www.creia.org/ Membership: 940

Florida Association of Building Inspectors (FABI)

Florida’s statewide 501(c)(6) association (founded 1984) focused on inspector education, standards, ethics, and a public member directory. Membership count is not publicly posted as of 2025; confirm with FABI.

https://www.fabi.org/ Membership: 0

Georgia Association of Home Inspectors (GAHI)

Georgia’s state association emphasizing ICC code‑certified home inspectors and continuing education. Membership count is not publicly posted; contact GAHI for current figures.

https://gahi.wildapricot.org/ Membership: 0

Home Inspectors Association BC (HIABC)

British Columbia’s not‑for‑profit provincial association and consumer voice. Offers licensing‑aligned training, equivalency pathways, insurance program (PIP), and mandatory CE. HIABC notes 300+ licensed members in BC and 350+ in its insurance plan.

https://hiabc.ca/ Membership: 300

Illinois Association of Home Inspectors (IAHI)

Statewide inspector association in Illinois focused on legislation, licensing, and member advocacy. Reported 360+ licensed home inspector members in 2020; verify current figures directly with IAHI.

https://iahi.pro/ Membership: 360

Indoor Air Quality Association (IAQA)

Multi‑disciplinary IAQ trade association serving many home inspectors who offer mold/radon/IAQ services. Provides education, ‘Find a Pro’ directory, and annual meeting. Public materials indicate roughly 2,000 individual and company members.

https://www.iaqa.org/ Membership: 2,000

International Association of Certified Home Inspectors (InterNACHI)

The world’s largest home inspection association. Provides the CPI credential, extensive free CE, standards, marketing, and consumer ‘Find an Inspector’—with transparent, real‑time membership statistics.

https://www.nachi.org/membership-stats.htm Membership: 24,677

International Association of Certified Indoor Air Consultants (IAC2)

Stand‑alone non‑profit certifying body used by many home inspectors for mold/radon credentials (IAC2 Certified). Offers directory listings, logos, and IAQ resources. Membership count isn’t publicly posted; confirm with IAC2.

https://iac2.org/ Membership: 0

New York State Association of Home Inspectors (NYSAHI)

Volunteer‑run, all‑state association and grassroots lobby for licensed New York home inspectors. Focuses on advocacy, CE (via the NYSAHI School), and a statewide ‘Find an Inspector’. Membership count not posted; contact NYSAHI.

https://nysahi.org/ Membership: 0

Indoor Environments Association (formerly AARST)

Trade association for radon professionals whose work (testing/mitigation) often complements home inspection. Publishes ANSI/AARST standards and The Radon Reporter. The magazine notes a reach of 3,500+ members and NRPP‑certified professionals.

https://aarst.org/ Membership: 3,500

North Carolina Licensed Home Inspectors Association (NCLHIA)

North Carolina’s oldest statewide inspector association (since 1997) offering CE, annual conference, chapters, and a member forum. Multiple sources reference 400+ members; verify the current tally with NCLHIA.

https://www.nclhia.com/ Membership: 400

Ontario Association of Certified Home Inspectors (OntarioACHI)

Ontario’s not‑for‑profit association awarding the Canadian‑Certified Home Inspector (CCHI) designation and advocating on standards and regulation. Public sources indicate a register of 1,050+ members of all types.

https://en.wikipedia.org/wiki/Ontario_Association_of_Certified_Home_Inspectors Membership: 1,050

Ontario Association of Home Inspectors (OAHI)

Ontario’s oldest and best‑known provincial association (est. 1994) awarding the RHI designation and operating an inspector directory and education programs. Membership count is not posted publicly; confirm directly with OAHI.

https://www.oahi.com/ Membership: 0

Wisconsin Association of Home Inspectors (WAHI)

Wisconsin’s 501(c)(6) statewide association (est. 1995) focused on training, legal support, arbitration services, and a public directory. States it has 300+ members and affiliates.

https://wahigroup.com/About-Us Membership: 300

Metropolitan Association of Home Inspectors (MAHI – New York)

Local/regional trade association for NY home inspectors offering monthly education and advocacy; reports that membership exceeds 40 paid members.

https://mahiny.org/about-us/ Membership: 40