PA DEP certificationMitigation #1418
Radon-resistant new construction in York County
Radon-resistant new construction means building radon control into a house while it goes up. 2 PA DEP-certified mitigation companies in or near York County say they design or install it for new homes.
Building a home? Start with building a new home to resist radon.
Planning or building: add radon-resistant features
House finished: insulation, doors, windows and appliances in
After you move in: test for radon
4 pCi/L or more: add a fan
Which Radon Companies Do New Construction in York County?
These PA DEP-certified mitigation companies say on their websites that they work on new homes.
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Sorted by number of Google reviews.
PA DEP certificationMitigation #1725 · Testing #1725
Also offers: crawlspace sub-membrane depressurization, post-mitigation re-testing and 2 moreWhat Goes Into a Radon-Resistant House?
Five basic parts that together make a passive system, with no fan. DEP's home buyer's and seller's guide says they may vary with the foundation and the site.
- Gas-permeable layer
- Plastic sheeting
- Sealing and caulking
- Vent pipe
- Junction boxes
What each one is: building a new home to resist radon.
When Should You Arrange Radon-Resistant Construction?
While the house is being planned or built. DEP's home buyer's and seller's guide says building these features in is easier and cheaper than fixing a radon problem from scratch later, and makes it easier to lower radon further if the passive features aren't enough.
Buying a newly built home? Ask the owner or builder whether it has radon-resistant features and whether it's been tested, DEP says.
What Happens After a Radon-Resistant House Is Built?
You test it, and add a fan if the result is 4 pCi/L or more.
Test after you move in
DEP says every new home should be tested after occupancy, even one built radon-resistant. Pennsylvania's testing rules (25 Pa. Code § 240.310) say a certified tester can't test a new building until the insulation, exterior doors, windows, ceilings, siding, and heating and cooling appliances are in.
Add a fan at 4 pCi/L or more
DEP's guide says a vent fan can easily be added to make the system active. Once a new home is occupied, DEP's 2014 fact sheet says any professionally installed system must be put in by a certified company. See does a builder's radon pipe need a fan?
The pipe outlet
When a certified company installs the system, Pennsylvania's mitigation standards (25 Pa. Code § 240.308) apply to its outlet whether fan-powered or passive.
Among the outlet rules for a system a certified company installs:
- Points upward (a 45-degree elbow is allowed)
- Vents outdoors
- No rain cap
- At least 10 feet above the nearest ground
What Should You Ask Your Builder or Radon Company?
Which radon-resistant features the house will have, and who will test it after you move in.
Do you use radon-resistant features?
Ask your builder which of the five the house will have.
What's your PA DEP certification number?
If a mitigation company does the work. Check it on PA DEP's Radon Services Directory, on the mitigation list, not the tester list.
Will the pipe outlet meet Pennsylvania's rules?
The rules bind certified companies, passive pipes included. Ask your builder to meet them too.
Are both junction boxes in?
One in the attic for a fan, one in the living space for the fan's alarm. DEP's guide lists both.
Who will test after we move in?
If the company that put in the system also offers to test it, DEP's consumer guide recommends an independent test, by an independent tester or by you, to avoid any conflict of interest.
More on choosing a company: how to choose a radon mitigation company.
Common Questions About Radon-Resistant New Construction
Does radon-resistant construction work?
Usually. PA DEP's 2014 citizen's guide says that, installed properly and completely, these simple and inexpensive techniques usually keep radon in new homes below 2 pCi/L. Every new home should still be tested after occupancy.
Do crawlspace homes get the gravel layer?
No. DEP's guide says the gas-permeable layer is used only in homes with basement and slab-on-grade foundations. In a crawlspace, plastic sheeting with sealed seams goes directly over the crawlspace floor.
When can a new house be tested for radon?
A certified tester can't until it's finished enough. Pennsylvania's testing rules also list interior trim, caulking, structural parts and plumbing appliances, and fireplaces and their dampers if the house will have them. No other work that could affect the test can be under way.
Does a passive radon pipe have to meet the venting rules?
When a certified company installs it, yes. Pennsylvania's mitigation standards say the outlet rules apply whether the system is fan-powered or passive.
Keep Reading About Radon Systems
Sources
- PA DEP: Pennsylvania Home Buyer's and Seller's Guide to Radon
- PA DEP: Pennsylvania Citizen's Guide to Radon (2900-BK-DEP0375)
- PA DEP: Pennsylvania Consumer's Guide to Radon Reduction
- PA DEP fact sheet: Radon Mitigation Systems (2940-FS-DEP4430)
- 25 Pa. Code § 240.308, Radon mitigation standards for residential buildings
- 25 Pa. Code § 240.310, Testing protocols
- PA DEP Radon Services Directory
Page last updated Oct 2026.