★ Certified Mold & Environmental Inspection Since 1998  |  ACAC & IICRC CertifiedServing Orange County & Southern California  |  (949) 239-3727
GPMI certified independent mold and environmental inspection
About Us

Certified, independent, and objective since 1998

Guaranteed Property and Mold Inspection is an owner-led mold and environmental inspection firm serving Orange County and Southern California. We inspect and test only, never remediate, so what our report says is driven by your property, not by a cleanup we are trying to sell.

Meet the founder

Joseph Gutierrez, founder and lead inspector

GPMI is led by Joseph Gutierrez, a certified environmental professional and property inspector whose work goes well beyond a quick look and a handheld reading. Joseph was personally trained and coached for years by Mr. Zivolich, a veteran environmental hygienist, and he has built this company on meticulous, complete work and straight answers.

He is well known and respected across the industry for his knowledge, his work ethic, and the way he treats clients. When a case is serious, whether it is a home sale, an insurance claim, a health concern, or litigation, we are who attorneys, physicians, insurers, and home buyers call.

  • ✓Certified by the American Council for Accredited Certification (ACAC)
  • ✓Council-certified Structural Mold Investigator (CSMI), certificate #1703019
  • ✓Council-certified Indoor Environmental Consultant (CIEC)
  • ✓Council-certified Microbial Investigator (CMI)
  • ✓IICRC Certified Water Damage Restoration Technician (Institute of Inspection, Cleaning and Restoration Certification)
  • ✓MICRO Certified Mold Remediation Contractor, #A4097 (Mold Inspection, Consulting and Remediation Organization)
Joseph Gutierrez, GPMI founder and Council-certified Structural Mold Investigator
Council-certified Structural Mold Investigator, certificate number 1703019, American Council for Accredited Certification
Our capabilities

Testing that goes well beyond a visual look

Most mold companies stop at what the eye can see. We bring the full range of environmental testing, matched to what your situation actually needs and analyzed by an accredited laboratory.

Mold inspection & testing

Air, surface, and wall-cavity sampling that identifies the mold type and concentration, confirmed by an accredited lab.

Thermal imaging

Infrared cameras that reveal hidden moisture behind walls, ceilings, and floors before it becomes visible mold.

Environmental Relative Mold Index (ERMI)

An EPA-developed, DNA-based mold-screening tool, used when prescribed by a medical professional for a health-driven investigation.

Volatile organic compounds & mycotoxins

Air testing for volatile organic compounds (VOCs) and mold-produced mycotoxins that can affect indoor air and health.

Allergen & bacteria sampling

Targeted sampling for allergens and bacteria, useful after water damage, sewage events, or when symptoms do not add up.

EMF/RF & indoor air quality

Electromagnetic field and radio frequency assessment plus full indoor air quality evaluation for a complete picture of the environment.

Why independent matters

The company that tells you is not the one that profits

We inspect and test only, and never sell remediation. That means the company telling you whether you have a problem is not the company that profits from the cleanup, so our findings stay objective. It is exactly why attorneys, physicians, insurers, and home buyers rely on our reports, and why our documentation holds up when a case is on the line.

No remediation upsellAccredited-lab reportingExpert witness experienceCertified since 1998
GPMI inspector checking moisture behind a wall
Credentials

Certified, accredited, bonded, and insured

We are nationally and statewide certified, fully bonded, and insured, and we hold top ratings on the Better Business Bureau, HomeAdvisor, Yelp, and Angie's List. Our inspection and environmental credentials include the American Council for Accredited Certification, the American Society of Home Inspectors, the California Real Estate Inspection Association, and the International Association of Certified Home Inspectors.

ACAC Council-certifiedIICRC certifiedCouncil-certified Structural Mold InvestigatorAIHA accredited laboratory analysisInterNACHI certifiedCREIA memberBBB accredited businessLicensed, bonded, and insured
Reviews

Rated 4.9 across 158 Google reviews

Orange County homeowners, buyers, and property managers on the inspection, the report, and the straight answers.

Read Our Reviews
How we work

The only bad question is the one you do not ask

We want you to leave your inspection fully informed and comfortable. We walk you through what we find, answer every question, and review the findings with you at the end. Then we deliver a clear written report with photographs, so you have documentation you can act on and, if it comes to it, defend.

Our standard

Every inspector trained to the same standard

Joseph personally trains every GPMI inspector for at least three months before they perform any service for a client. The meticulous, complete standard the company was built on is the standard you get, no matter who arrives at your door.

Healthy homes, trusted answers. GPMI independent mold and environmental inspections.
Questions

About us FAQ

Independence, credentials, and who actually does the work.

If the same company tests for mold and also removes it, how do I know the findings are honest?
You do not, and that is the whole reason we exist. When one company decides how big your problem is and then sells you the cleanup for it, the incentive runs one way. We inspect and test only. We have never performed remediation, we do not subcontract it, and we take no fee, commission, or referral payment from the contractors you go on to hire. Whatever our report says about your property, we make exactly the same money.
Do you remove or remediate the mold you find?
No, and we never have. We find the mold, we find the water causing it, we document both with accredited laboratory analysis, and we hand you a report you take to a remediation contractor of your choosing. Keeping those two jobs in separate hands is the standard in every state that regulates this work, including Texas, Florida, and New York, and it is why our findings carry weight with insurers, buyers, and attorneys.
Who is going to show up at my house?
Guaranteed Property and Mold Inspection is owner led. Joseph Gutierrez, our founder and lead inspector, is personally involved in the work rather than dispatching a rotating crew, and every inspector who works for us trains under him for at least three months before performing a single service for a client. When you book, tell us your situation and we will tell you who is coming.
What certifications do you actually hold, and what do they mean?
Our credentials sit with the American Council for Accredited Certification, the Institute of Inspection, Cleaning and Restoration Certification, the Certified Structural Mold Inspector program, and MICRO, and we maintain them through ongoing continuing education rather than earning them once. The one worth understanding is the American Council for Accredited Certification, which certifies individual indoor environmental professionals against experience requirements and an examination, and which is itself accredited by the Council of Engineering and Scientific Specialty Boards. That is an independent check on the credential, which matters in a field where anyone can print a certificate.
Does California license mold inspectors?
No, and this is the most important thing a California homeowner can know before hiring anyone. The California Department of Public Health states plainly that California has no state regulations for mold inspection, assessment, or remediation, and no license exists for any of it. Anyone can call themselves a mold inspector here tomorrow. That is precisely why third party certification, an accredited laboratory, and a written scope matter so much in this state, and why you should ask every company you call to name theirs.
How long have you been doing this?
Since 1998. That is more than twenty five years of inspections across Orange County and Southern California, which matters less as a marketing number and more as a practical one. A firm that has seen the same tract construction, the same coastal moisture, the same slab leak patterns, and the same slow roof failures for that long knows where to look first.
Are you licensed, bonded, and insured?
Yes. We are certified, bonded, and insured, and we are a Better Business Bureau accredited business. Ask any company you are considering for proof of insurance before they set foot in your home, and treat hesitation as an answer.
Do you get paid by the remediation companies you refer me to?
No. We accept no referral fees, no commissions, and no financial relationship of any kind with remediation contractors, restoration companies, insurers, or real estate agents. When we give you names, they are names we would give a family member, and you are free to ignore them and hire anyone you like. A report that leads to a specific contractor who pays for the lead is not an independent report.
Can I read reviews or talk to past customers?
Yes. We hold a rating of 4.9 across more than one hundred and fifty Google reviews, and they are worth reading rather than counting, because the pattern in them is the useful part. What customers describe again and again is thoroughness, being walked through the findings, and getting a straight answer rather than a sales pitch.
Do you sell air purifiers, ozone treatments, or mold killing products?
No. We sell inspection and testing, and nothing else. Be careful with any company offering ozone generators, fogging, miracle solutions, or mold sniffing services alongside an inspection, because those are product sales dressed as findings, and several of them have no scientific support at all.

Work with a firm that stays objective

Book a certified, independent inspection and get an objective, lab-backed report you can act on.

Privacy Policy · Terms of Use · Manage Cookies · Website by Outdooit · Digital Marketing for Home Services
Call NowBook an Inspection