An InterNACHI Certified Professional Inspector (CPI) has passed a proctored exam, agreed to a written Standards of Practice and Code of Ethics, and completes mandatory continuing education every year. Because California does not license home inspectors at all, that certification – paired with hands-on experience – is one of the few real ways to verify the person walking your future home actually knows what they’re doing.
California has no home inspector license – and why that matters
This surprises almost every buyer who hears it: there is no California state license for home inspectors. Plumbers, electricians, general contractors, real estate agents – all licensed and regulated by the state. Home inspectors are not. The Business and Professions Code spells out what an inspector must do and can’t do (Sections 7195-7199), but it never created a license, a board, or an exam to enter the field.
What that means in practice is sobering. Anyone in San Diego County can buy a flashlight, print business cards, and start inspecting homes tomorrow with zero training, zero testing, and zero oversight. There’s no state body checking their work and no license to suspend if they do a bad job. The burden of vetting falls entirely on you – usually during the most stressful, time-pressured week of a real estate transaction.
So when there’s no license to look for, what do you look for instead? Credible third-party certification. That’s the gap InterNACHI fills.
What InterNACHI certification actually requires
InterNACHI – the International Association of Certified Home Inspectors – is the largest inspection trade association in the world. Its Certified Professional Inspector (CPI) designation isn’t a badge you buy; it’s a credential you have to earn and keep. To become and remain a CPI, an inspector must:
- Pass the InterNACHI Online Inspector Examination – a proctored, psychometrically validated test of building systems, defect recognition, and reporting.
- Complete required coursework covering roofing, structure, electrical, plumbing, HVAC, exterior, and report writing before performing fee-paid inspections.
- Agree to and follow the InterNACHI Standards of Practice – the written rulebook that defines exactly what a general home inspection covers.
- Sign the Code of Ethics – including the conflict-of-interest rules below.
- Complete continuing education every year to stay certified. The field changes; so do the requirements.
None of these replace a state license, because no state license exists. But together they give you something a license alone often doesn’t: documented, ongoing proof of competence from an organization with a reputation to protect.
The Standards of Practice: a clear, shared definition of the job
One of the most useful things about hiring an InterNACHI inspector is that you both know what “a home inspection” means before anyone shows up. The Standards of Practice define it as a non-invasive, visual examination of the readily accessible systems and components of a home – the roof, structure, electrical, plumbing, heating and cooling, insulation, and the building envelope.
That word “visual” sets honest expectations on both sides. An inspector doesn’t open walls, dig up the yard, or dismantle equipment. The standards also list what’s specifically excluded, so there are no surprises about scope. If you want to understand those boundaries in detail before you book, we wrote a full explainer on what a home inspection does and doesn’t cover. Knowing the rules of the game up front is exactly what a shared Standards of Practice gives you.
The Code of Ethics: whose side the inspector is on
Here’s the part that protects your wallet most directly. The InterNACHI Code of Ethics prohibits an inspector from accepting compensation – directly or indirectly – for referring repairs, and from doing the repair work on a home they inspected. In other words, your inspector has no financial incentive to inflate (or downplay) what they find.
That independence matters. A buyer’s inspector should answer to the buyer, full stop. When the person evaluating the home can’t profit from the repairs they recommend, you can trust that the report reflects the house – not a sales funnel. This is one reason a dedicated buyer’s inspection is worth insisting on rather than relying on a casual walkthrough from someone with a stake in the outcome.
Certification plus a contractor’s license: a useful combination
At The Real Estate Inspection Company, owner and lead inspector Joseph Romeo is an InterNACHI Certified Professional Inspector (CPI) and also holds CSLB General Contractor License #1113143. That second credential is meaningful in California precisely because it’s the part the state does regulate.
A general contractor’s license means the Contractors State License Board has verified experience, tested competency, and required bonding and insurance to build and remodel homes. An inspector who has also worked as a licensed GC has stood on both sides of the wall – they’ve installed the framing, run the rough plumbing, and tied in the panel, so they recognize how things go wrong because they know exactly how they’re supposed to go together. For older San Diego housing stock especially, that construction background sharpens the read on foundations, additions, and the kind of unpermitted work that’s common across the county.
To be clear about scope: a general inspection is still a visual one, and certain specialties stay with their own licensed pros. Wood-destroying organisms (termites) are evaluated by a licensed pest operator; mold, asbestos, lead, and radon are visual observation plus specialist or lab testing; septic and well systems get a visual look versus a specialist’s full evaluation. Certification doesn’t blur those lines – it makes a good inspector more honest about them.
One quick, honest note on radon
Buyers sometimes ask whether an InterNACHI inspector will push radon testing. Here’s the straight answer for our area: most of San Diego County sits in EPA Radon Zone 3, the lowest-risk category. Radon is rarely a concern locally. Testing is still available if you want certainty for your own peace of mind, but a trustworthy local inspector won’t manufacture urgency around it – and the ethics standards above are part of why.
How to use this when you’re hiring
Certification is a strong starting filter, not the finish line. Look for the CPI credential, then confirm experience with homes like the one you’re buying, ask to see a sample report, and make sure the inspector welcomes you walking the property with them. For a step-by-step framework, see our guide on how to choose a home inspector in San Diego, and read more about our background and approach if you want to know who you’d actually be working with.
The takeaway is simple. In a state with no inspector license, an InterNACHI certification – backed by real experience and, in our case, a CSLB contractor’s license – tells you the person inspecting your home has been trained, tested, held to a written code, and kept current. That’s exactly the assurance the missing license was supposed to provide.
Questions about a specific San Diego County property, or ready to schedule? Call (619) 752-4399 or reach Joseph Romeo through our contact page. Pricing depends on the home’s square footage, age, and access – see our fee schedule for how it works.
