Cornerstone Inspection Services LLC

What They Do

Mold Testing

• Annual maintenance checkup
• 11th month warranty inspections
• Manufactured home inspections
• Mold sampling
• Multi-unit inspections
• New construction inspections
• Pre-listing inspections
• Rental property inspections
• Thermal Imaging
• Residential Home Inspection
• Problem Area Inspection
• Pool & Spa
• Roof Inspections
• Moisture Intrusion
• Radon Testing
• Custom Service
• Full Home
• Full Home Inspection
• Home Inspections
• Partial Inspection
• Pools And Spas
• Basic Home Inspection
• Crawlspace Inspection
• Doors And Windows
• Full Residential Inspection
• General Home Inspection
• Inspection Report
• Lab Analysis

In Their Own Words

Cornerstone Inspection Services LLC is a family owned and operated home inspection company based out of Wildwood, Missouri. Proudly serving St. Louis county and surrounding areas. We are a full service inspection company providing many different services including but not limited to- Residential Inspections, Mold inspection and sampling, Air Quality, Radon testing, Thermal Imaging, Partial Inspections, Problem Area Inspections, Wood Destroying Organisms, Pre-drywall, Pool & Spas, 3-phase inspections and New Construction! ASHI, InterNACHI and ICA certified. Licensed and Insured.

Written by the business on its public profile. We have not verified these claims.

Before You Call Cornerstone Inspection Services LLC

1. Do you also do remediation? If so, who checks your work?
2. How many air samples will you take, and will you take an outdoor control sample?

Missouri has no statewide general contractor license, so check with your city or county, and in Illinois ask a roofer for a state roofing license. Also ask for proof of insurance and industry certification for the restoration crew.

They list no storefront. Ask where the business is based and whether the crew is their own.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• DIY with careAttic Mold on Roof Sheathing, Causes and FixesWhy mold grows on attic roof sheathing, how to find the cause, the fixes that stop it for good, and how to tell a cosmetic stain from a roof that needs work.