MOLDWARDEN

Founder, building useful mold apps

About

Bill Gregory — mold inspector and owner of MoldWarden in Vista, CA. I built two free tools to help homeowners and renters in North County San Diego (and beyond) understand their mold risk and legal rights without having to make a call first. Happy to answer any mold questions in the comments.

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Maker History

California Tenant Mold Rights GuideFree interactive guide to renter rights on mold
May 2026
Do I Need Mold Testing?Free mold risk assessment for homeowners & renters
May 2026

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Joined Product HuntMay 8th, 2026

Forums

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2d ago

California Tenant Mold Rights Guide - Free interactive guide to renter rights on mold

Most California renters don't know their legal rights when it comes to mold until they're already in a dispute. This free tool covers landlord obligations under Civil Code 1941 and SB 655, your legal remedies, anti-retaliation protections, San Diego local resources, and an interactive decision tree that walks you through your specific situation. No sign-up required. Built by MoldWarden in Vista, CA.

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3d ago

Do I Need Mold Testing? - Free mold risk assessment for homeowners & renters

A free 9-question interactive quiz that gives homeowners and California renters an instant mold risk rating — no sign-up, no sales pressure. Answer questions about water damage history, musty odors, humidity, health symptoms, and more. Built by MoldWarden, a mold inspector in Vista, CA serving North County San Diego.