What we checked, and what we found
The DEP publishes its certified firms monthly as two documents, one for mitigators and one for testers, each listing the certification number, the firm or individual name, the address and the county. We searched the 1 September 2026 editions for Allied Home Inspections across every region, not only York County, because the county column records where a firm is registered rather than where it works.
No entry came back. For comparison, the other firms in this guide returned between two and eight entries each.
Why that is a question rather than a verdict
- A different legal name. Certifications are held by the entity, and the trading name on a website is often not the entity name on a state register.
- An individual rather than the firm. Pennsylvania certifies people as well as businesses, so the certification may sit with a named inspector rather than with the company.
- Subcontracting. A firm can offer mitigation and have a certified installer do the work.
What it does mean is that you cannot verify the claim from the public register without more information, and that is worth a phone call before you book.
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The question to ask
Ask for the certification number and the exact name it is registered under, then check it in the DEP radon services directory or by calling the Radon Division on 800-237-2366. A certified contractor expects that question and answering it costs them nothing.
Our own directory listed this firm under mitigation and testing before we ran this check. It now reflects what the register shows, which is the standard we apply to ourselves as well.
How that compares
The other firms in this guide return between two and eight entries each, across 21 mitigation and 14 testing certifications in total. This one and 1 other return none under their trading name.
Verify it before you book
Ask for the certification number and the exact name it is held under, then check it against the current register or call the Radon Division on 800-237-2366. What the programme covers and what it does not promise is on the page about PA DEP radon certification.
Common questions about Allied Home Inspections, Inc.
Is Allied Home Inspections DEP certified for radon?
The firm states on its own site that it is certified for testing and mitigation. That name returns no entry in the September 2026 DEP register in either list, searched across all regions. Ask for the number and the name it is registered under.
Does that mean they are not certified?
No. A certification can be held under a different legal name, held by a named individual rather than the firm, or the work can be subcontracted to a certified installer. It means the claim cannot be verified from the public register without more information.
How do I check for myself?
The DEP publishes its certified mitigators and testers monthly as public documents, searchable by name, number and county. You can also call the Radon Division on 800-237-2366 and ask them to confirm a number.