What the register shows
We searched the 1 September 2026 editions of both DEP documents across every region rather than only York County, because that column records the registered address and not the service area. No entry came back under this name.
Where a commercial specialist fits
Most of this guide is written for houses, because most York County radon work is residential. Unisource handles commercial property as well, where the inspection requirements, the building sizes and the occupancy patterns all differ from a family home.
If the building is commercial, the questions change: how many measurement locations, over what period, and under what occupancy conditions. Those are worth settling before the survey rather than after it, and they are not answered by a residential price list.
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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 Unisource Property Inspection Services, LLC
Is Unisource in the DEP radon register?
No entry appears under that name in the September 2026 mitigation or testing lists, searched across all regions. That does not establish whether a certification exists under a different entity or individual name.
What should I ask them?
Ask for the radon 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.
Do they cover commercial buildings?
The firm handles radon and mold surveys for both residential and commercial property, with infrared thermography alongside. Commercial radon measurement follows different protocols from a house, so settle the scope before the survey.