
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.
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)


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.
Air, surface, and wall-cavity sampling that identifies the mold type and concentration, confirmed by an accredited lab.
Infrared cameras that reveal hidden moisture behind walls, ceilings, and floors before it becomes visible mold.
An EPA-developed, DNA-based mold-screening tool, used when prescribed by a medical professional for a health-driven investigation.
Air testing for volatile organic compounds (VOCs) and mold-produced mycotoxins that can affect indoor air and health.
Targeted sampling for allergens and bacteria, useful after water damage, sewage events, or when symptoms do not add up.
Electromagnetic field and radio frequency assessment plus full indoor air quality evaluation for a complete picture of the environment.
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.

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.








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 ReviewsThe 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.
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.

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?
Do you remove or remediate the mold you find?
Who is going to show up at my house?
What certifications do you actually hold, and what do they mean?
Does California license mold inspectors?
How long have you been doing this?
Are you licensed, bonded, and insured?
Do you get paid by the remediation companies you refer me to?
Can I read reviews or talk to past customers?
Do you sell air purifiers, ozone treatments, or mold killing products?
Work with a firm that stays objective
Book a certified, independent inspection and get an objective, lab-backed report you can act on.
