To get a home inspector license in Washington State, you need to complete a 120-hour board-approved training course, mentor with an experienced inspector for 40 hours including 5 actual inspections, pass the National Home Inspector Examination (NHIE), pass a criminal background check, and submit your license application to the Washington State Department of Licensing (DOL). Washington has some of the most thorough pre-licensing requirements in the country, and for good reason. Those requirements produce better inspectors.
I am Russ Motyko, a Certified Master Inspector licensed in both Oregon (CMI #1898) and Washington (License #1856). I have completed more than 2,000 inspections throughout the Portland-Vancouver metro area, including throughout Clark County in Southwest Washington. Before becoming a full-time inspector, I trained more than 100 other inspectors. Here is everything you need to know about getting licensed in Washington.
Step 1: Complete the 120-Hour Fundamentals Course
Washington requires you to complete a board-approved 120-hour Fundamentals of Home Inspection course. This is a substantial education requirement. It is three times the coursework that Oregon requires. The course must be approved by the Washington State Home Inspectors Board, which operates under the Department of Licensing.
These courses are available both online and in person. The DOL maintains an Education Course Catalog of approved programs. When choosing a program, look for one that covers all the major systems you will inspect: structural, roofing, exterior, electrical, plumbing, HVAC, insulation, ventilation, and interior. Programs that include field components and mock inspections alongside classroom instruction tend to produce more job-ready graduates.
The 120-hour requirement exists because home inspection is a consequential profession. Buyers rely on your findings to make decisions involving hundreds of thousands of dollars. The state wants you prepared before you touch a paying client’s home. That philosophy is correct.
Step 2: Complete 40 Hours of Field Mentorship
After completing your classroom training, you must mentor with an experienced home inspector for 40 hours of field training. That mentorship must include at least 5 actual home inspections. This is not shadow time on the sidelines. You are actively learning in real inspections on real properties with real clients.
Finding a good mentor inspector is one of the most valuable parts of this process. An experienced inspector can show you in an afternoon what would take you months of solo work to figure out. Look for someone with several years of experience and a solid reputation. Pay attention not just to what they flag but to how they communicate findings to clients and agents. That communication skill is what separates average inspectors from excellent ones.
If you are in the Portland-Vancouver area, the Clark County and Southwest Washington inspection community is fairly tight-knit. Reaching out through InterNACHI or ASHI chapter events is a good way to make connections with potential mentors.
Step 3: Submit Your Exam Application
Once you have completed your 120-hour course and your 40 hours of field training, you submit an Exam Application to the DOL. Your application must include your certificate of completion from the board-approved fundamentals course and documentation of your field training.
Mail your exam application to:
Home Inspectors, Department of Licensing, PO Box 9021, Olympia, WA 98507-9021
After the DOL reviews and approves your application, you will receive an Exam Approval Letter with an Assigned ID number from the testing vendor. You will use that ID to schedule your exam.
Step 4: Pass the National Home Inspector Examination
Washington uses the same NHIE that Oregon does. It is a 200-question multiple choice exam administered over four hours at a testing center. The exam covers home systems, inspection methodology, professional practice, and reporting standards. You must pass this exam before applying for your license.
If you do not pass on your first attempt, you must wait at least 30 days before retaking it. There is no limit to the number of attempts, but all attempts must fall within your 2-year eligibility window that begins when your exam application is approved. Study thoroughly before your first attempt. The exam is designed to be passable, not a trick, but it requires real preparation.
You will receive your pass or fail result immediately when you leave the testing center.
Step 5: Pass a Criminal Background Check
Washington requires a criminal background check as part of the licensing process. This is standard for professional licensure in a field where you are entering people’s homes. The vast majority of applicants clear this without issue. If you have concerns about your record, it is worth consulting with an attorney before investing in training.
Step 6: Apply for Your Washington Home Inspector License
Once you have passed the exam and cleared the background check, you submit your license application to the DOL with the required licensing fee. The fee is subject to change, so verify the current amount at dol.wa.gov before submitting. The DOL contact for home inspector licensing is (360) 664-6487 or DOLINTHomeInspectors@dol.wa.gov.
Once your license is issued, you are legally authorized to perform home inspections for compensation in Washington State. Your license number is your professional identifier. Mine is #1856, and I include it on every inspection agreement and report.
Step 7: Renew Every Two Years
Washington home inspector licenses expire every two years on your birthday. To renew, you must complete 24 hours of continuing education during each renewal period. Keep track of your CE hours and renewal dates from day one. Letting your license lapse means you cannot legally inspect homes in Washington, which is a real business disruption if it happens mid-year.
Washington Licensing Requirements at a Glance
- Governing body: Washington State Department of Licensing, (360) 664-6487
- Education required: 120-hour board-approved Fundamentals of Home Inspection course
- Field training required: 40 hours with an experienced inspector, including 5 actual inspections
- Exam required: National Home Inspector Examination (NHIE), 200 questions, 4 hours
- Background check: Required
- Renewal: Every 2 years on your birthday with 24 CE hours
- Licensing fee: Verify current amount at dol.wa.gov
Washington vs. Oregon: How Do the Requirements Compare?
Washington’s licensing requirements are more demanding than Oregon’s. Oregon requires approximately 60 hours of training through its 20-point education system. Washington requires 120 hours of classroom training plus 40 hours of field mentorship. Washington also requires a background check that Oregon does not mandate at the certification level.
The result is that Washington-licensed inspectors tend to enter the field with more formal preparation than their Oregon counterparts. Both states produce capable inspectors, but the Washington path is more structured and takes longer to complete.
If you are going to be working in the Portland-Vancouver metro area, getting licensed in both states is the smart play. See the Oregon home inspector licensing requirements to compare the two processes side by side.
Do You Need a Degree?
No. Washington does not require a college degree to become a licensed home inspector. The state requires the 120-hour course, the field mentorship, the passed exam, and the background check. That is it. Construction experience, trade licenses, and contractor backgrounds are all valuable preparation but none are required. Read the full breakdown of whether you need a degree to become a home inspector.
What Happens After You Get Licensed
Getting your Washington license is the foundation. Building a successful inspection business on top of it takes consistent effort. The inspectors who thrive in the Clark County and Southwest Washington market do so by delivering thorough work, building strong agent relationships, investing in tools like thermal imaging cameras, and pursuing advanced credentials over time.
The Certified Master Inspector (CMI) designation is the highest credential in the profession. It requires 1,000 completed inspections and ongoing advanced education. Working toward CMI after getting your state license is the long-term goal worth keeping in mind from day one.
See what Washington home inspectors earn to understand the financial picture for this career in this market.
Trusted Home Inspections serves all of Clark County and Southwest Washington, including Vancouver, Camas, Washougal, Battle Ground, and Ridgefield, in addition to the full Portland metro area in Oregon. Schedule your home inspection today with a dual-licensed Certified Master Inspector with 2,000+ inspections and free thermal imaging on every job.