How to Become a Certified Home Inspector in Washington


Home Inspector Licensing:

RCW 18.280.070 Qualifications for licensure. In order to become licensed as a home inspector, an applicant must submit the following to the department:

 (1) An application;

 (2) Proof of a minimum of one hundred twenty hours of classroom instruction approved by the board;

 (3) Proof of up to forty hours of field training supervised by a licensed home inspector;

 (4) Evidence of successful passage of the written exam as required in RCW 18.280.080; and

 (5) A fee. For details on licensing, visit the Washington website.

Continuing Education (online & free for members):

To renew your home inspector license, you must complete 24 hours of approved home inspector continuing education since you last renewed.
InterNACHI's online courses are available to members for free. Not a member? Join now.  After joining as a member, you'll have access to everything you need to be successful, including all of InterNACHI's online training, certifications, Continuing Education, marketing, and business services. InterNACHI has everything you need, all in one place

The following online courses are approved by the Washington Department of Licensing for home inspector Continuing Education (online & free for members):


Radon Tester Certification in Washington (online & free for members): 

Although there are no state regulations for radon testing in Washington, the Washington State Department of Health recommends hiring a professional radon tester. (as of Oct 2014).  Visit the Washington website for details.
Become a Certified Radon Tester by taking InterNACHI's free, online "Advanced Radon Measurement Service Provide Course," which is NRPP- and AARST-approved for both initial certification and Continuing Education. The course details are located at

Free Marketing Cards (free for members):

This is a great marketing strategy for members to promote their business to licensed real estate professionals, who can attain free, online Continuing Education (CE) credits by contacting their local InterNACHI member.
Tell them to visit and register for the free online Continuing Education course. The course promotes the value of hiring an InterNACHI Home Energy Inspector. When a real estate professional logs into the course and enters the InterNACHI member's ID number, the member will be automatically notified by email.
Visit for more information on how to market this opportunity to real estate agents. 

Wood-Destroying Organism Inspection CE:

The Washington State Department of Agriculture has approved InterNACHI's online "Wood-Destroying Organism Inspection" course for 15 credits. For approval details, visit

Home Energy Inspector™ Certification (online & free for members):

Become a Certified Home Energy Inspector™. The online training and certification is free for members. No infrared, no blower door, and no additional training needed. Visit

Roof Data Technician (free for members to participate):

The Roof Data Technician Program, developed by InterNACHI and Owens Corning and Lowe's, provides an additional revenue stream for InterNACHI members who are hired by Owens Corning as part of a roof warranty claim resolution process. (This program is operational in the United States only.) To participate in the program, visit

Business & Marketing (online & free for members):

Free, online "Home Inspection Business Course":
InterNACHI's Marketing Team will design a new logo for your inspection business or re-design your existing logo, and design and customize your business cards, flyers and brochures. It's all for free. Take a look at the free design work we've done for our members (free to members). Contact the Inspector Marketing Department today

Homeowner Newsletter (online & free for members):

Keep in touch with all of your clients! The InterNACHI Homeowner Newsletter is: 
  • free to members;
  • customized by you according to condition of each house inspected;
  • has 5 years worth of monthly issues;
  • includes your photo and logo in each issue.
Your photo or business logo and website link will appear in each newsletter issue, so your clients can keep your contact information handy. Learn more about the newsletter at
Order handout cards to sign homeowners up for your Homeowner Newsletter (a customizable, monthly newsletter system that is free to members). Order your cards at

Everything You Need, All in One Place:

InterNACHI provides everything you need to be successful. Visit

Membership Benefits (free for members):

InterNACHI provides over $75,000 worth of benefits to its members at no cost. Visit

Archived Approval Letters:


Washington State Department of Agriculture approves InterNACHI's free, online Wood Destroying Organism course.
More approved and accredited inspector education.