Hiring
How to choose a home inspector
Most buyers hire the first inspector their agent names, on the day the offer is accepted, without ever seeing the person's work. It is an understandable shortcut under a tight contingency clock, and it is the wrong one. A short list of questions, asked before you book, tells you more about an inspector than any logo on a website does.
An inspection is not a commodity. Two inspectors can walk the same house on the same day and hand you reports that are twenty pages apart in length and honesty. This page is about how to tell them apart in advance: what the credentials actually certify, what to ask before you hire, the warning signs that should end the conversation, and how to read a report sample so you know what you are buying. It leans on the two documents that define the work across most of the country, the Standard of Practice published by the American Society of Home Inspectors (ASHI) and the Standards of Practice published by InterNACHI.
What the credentials actually mean
Credentials fall into two buckets that people constantly confuse: a state license, which is a legal permission to work, and a professional membership or certification, which is an association's own quality mark. They are not the same thing, and one is not a substitute for the other.
State licensing, and the states with none
Whether an inspector needs a license at all depends entirely on where the house is. According to InterNACHI's licensing overview, "every state or province have their own certification or licensing requirements, and some regulate home inspectors by issuing licenses and some do not" (nachi.org). Many states license home inspectors and several do not.
The practical takeaways are simple. In a licensed state, confirm the license is current before you hire, and know that the license sets a legal floor, not a ceiling: it proves the inspector met the minimum the state demands, nothing more. In an unlicensed state, the license question is meaningless and a voluntary credential does the work the state does not. In Massachusetts, for example, home inspectors are licensed by the Board of Registration of Home Inspectors, which sets its own required scope and standards; a buyer there can and should verify a license, while a buyer in an unlicensed state has to lean harder on the questions below.
ASHI and InterNACHI membership
The two association marks buyers see most often are ASHI's and InterNACHI's, and the label alone tells you less than you would think, because each organization has tiers. Entry-level membership can mean little more than "paid the dues and agreed to the ethics code." The tier that signals real, verified experience is the top one.
ASHI's senior designation is the ASHI Certified Inspector. According to ASHI, an ACI must pass the National Home Inspector Examination, complete "a minimum of 250 fee-paid home inspections that comply with ASHI's Standards of Practice," submit reports for review and verification, adhere to the ASHI Code of Ethics, and earn "20 ASHI Continuing Education Credits on a yearly basis" (homeinspector.org). The number 250 is the point: it represents close to a year of full-time work, so an ACI has seen a real range of houses, not just their own.
InterNACHI's core credential is the Certified Professional Inspector. According to InterNACHI's certification requirements, a CPI must pass InterNACHI's Online Inspector Examination, complete a Code of Ethics course and a Standards of Practice course, submit "four mock (or simulated) inspection reports," and, to stay certified, "complete 24 hours of Continuing Education" and re-pass the exam every three years (nachi.org). Note the difference in the experience bar: ASHI's ACI requires hundreds of real fee-paid inspections, while InterNACHI's entry requirement is education plus mock reports. Neither is worthless, but they certify different things, and a brand-new CPI has less field experience behind the mark than an ACI does.
The one-line version. A license is legal permission and a floor. A membership logo is a starting point. The credential that actually signals experience is the senior tier, most clearly ASHI's Certified Inspector with its 250-inspection requirement. Ask which tier the inspector holds, not just which association.
What to ask before you hire
Everything in this section can be settled in one phone call or email before you commit. An inspector worth hiring will answer all of it without hesitation.
Ask for a full sample report
This is the single most useful question, and it is covered in detail below. Both standards require the inspector to produce a written report describing what was inspected and identifying the material defects observed, so every legitimate inspector has reports to show. Ask for a complete recent sample, not a two-page excerpt. An inspector who will not share one is telling you something.
Ask which standard governs the work
Ask whether the inspection follows the ASHI Standard of Practice, the InterNACHI Standards of Practice, or a state standard, and read it. The standard defines what the inspector is and is not obligated to do, and it is what your report should broadly track. Knowing it in advance is also the best defense against later disappointment, because most complaints about an inspection are really complaints about a limit the standard states plainly.
Ask about insurance: E&O and general liability
There are two separate policies, and they cover different risks. Errors and omissions (E&O) insurance covers a mistake in the inspector's professional work, such as a defect the standard required them to report and they missed. General liability insurance covers ordinary accidents, such as damage to the property or an injury during the visit. Not every state mandates either one, and the standards of practice do not require an inspector to carry them, so ask directly and ask for both. Coverage is not proof of competence, but its absence tells you the inspector has no financial backstop if something goes wrong, and neither will you.
Ask what is included and what is extra
A base home inspection is a visual, non-invasive look at the readily accessible parts of the house, and it deliberately excludes a long list of things buyers assume are covered: radon, mold, pests, septic systems, private wells and water quality, and buried oil tanks are the common ones. Ask which ancillary services the inspector offers, which they refer out, and how each is priced, and book the ones you need early so results land inside your contingency window. For the full scope-and-exclusions picture, see our companion guide, what a home inspection actually covers.
Ask about experience and whether you can attend
Ask how many inspections the person has done and how long they have worked full time, and ask whether you can walk the house with them. Attending is the most valuable part of the process: the spoken narrative is richer than the written report, and it is your chance to ask, in real time, what could not be reached and why.
Red flags that should end the conversation
Some answers are not yellow flags to weigh against price. They are reasons to hire someone else.
| Red flag | Why it matters |
|---|---|
| Recommended only by your agent, with no other option offered | Your agent is paid when the deal closes; an inspector who finds problems can cost them that. That is a structural conflict of interest, not necessarily bad faith. A good agent gives you two or three names and lets you choose. Cross-check any single recommendation against reviews and the credential questions above. |
| Guarantees a "clean" report or promises the deal will go through | An honest inspector cannot know what they will find before they arrive. Both standards describe the report as an account of conditions observed on the day, not a pass or fail. A promise about the outcome is a promise to tell you what you want to hear. |
| Will not provide a sample report | Every real inspector has reports. Refusal usually means the reports are thin, boilerplate, or embarrassing. There is no good reason for it. |
| Suspiciously cheap and suspiciously fast | A thorough inspection of an average single-family home takes hours, not forty-five minutes. A price far below the local norm often buys a walkthrough and a checklist, not an inspection. |
| Pressures you to hire their repair company, or offers to do the repairs | An inspector who profits from the repairs they recommend has a reason to find, or invent, work. Inspection and repair should be separate businesses. |
| No license in a state that requires one, or no verifiable credential in a state that does not | In a licensed state, an expired or absent license can make the report worthless for your contingency. In an unlicensed state, a voluntary credential is the only external check that exists. |
How to read a sample report
Once you have a sample in hand, you are no longer guessing. A report is where an inspector's real standard of work shows, and you can judge one without any technical background. Here is what to look for.
- Photographs of the actual findings. A serious report documents each significant defect with a photo of that specific condition, not stock images. Photos are how you and your contractor understand the problem later, and how you show the seller what you are asking to have addressed.
- Specific, located, plain-language findings. "Active leak at the P-trap under the kitchen sink, staining the cabinet base" is a finding you can act on. "Plumbing: monitor" is not. Look for where the problem is, what it is, and what the inspector recommends.
- A clear limitations section, and honesty about what was not reached. This is the mark of an honest report. Because the inspection is visual and non-invasive, parts of every house go unexamined: a blocked attic hatch, a snow-covered roof, furniture against a wall, utilities shut off, a crawl space too low to enter. A good report names each one. A report that claims to have seen everything is either dishonest or careless.
- Findings sorted by seriousness. The best reports separate safety issues and major defects from cosmetic notes, so you are not left weighing a cracked outlet cover against a failing furnace on the same flat list. This reflects the standards' focus on the material defect, the issue that has a significant adverse effect on value or poses an unreasonable risk, rather than on every minor flaw.
- No promises the standard forbids. A report should not tell you how many years are left on the roof, whether the house is "up to code," or that a system is guaranteed sound. Those judgments are outside the scope of a home inspection, and a report that makes them confidently is overreaching.
Read the sample the way you would read your own report. If it is specific, photographed, honest about its limits, and organized by what matters, you have found someone who does the job properly. If it is vague, image-free, and silent about what could not be reached, keep looking, however convenient the referral was.
Sources
- ASHI Certified Inspector requirements, American Society of Home Inspectors. National Home Inspector Examination, the 250 fee-paid inspection requirement, report verification, Code of Ethics, and continuing education.
- Standard of Practice, American Society of Home Inspectors (ASHI). The written report requirement, scope, and general limitations and exclusions.
- Certified Professional Inspector requirements, International Association of Certified Home Inspectors (InterNACHI). The online examination, ethics and standards courses, four mock reports, and continuing education.
- Standards of Practice, InterNACHI. The definition of a home inspection and of a material defect, and the written report requirement.
- United States home inspector licensing and certification, InterNACHI. That states set their own requirements and some regulate inspectors by license while others do not.
- Board of Registration of Home Inspectors, Commonwealth of Massachusetts. Licensing of home inspectors in Massachusetts.
Related
- What a home inspection actually covers, and what it does not.
- The final report, from the ALLSAFE archive.
- The full ALLSAFE archive index.