Sub-Slab Depressurization
The workhorse for York basements and slab homes. One suction point under the floor creates a vacuum that steers radon away from the house.
Active sub-slab depressurization for York homes
Radon System Installation: Sub-Slab Depressurization
Radon Reduction System · Suction Point Design · Radon Vent Pipe Installation
Active sub-slab depressurization (ASD) catches radon gas before it ever gets inside. Our certified crew cores a suction point through the basement slab and hollows out a pit in the soil underneath. That pit ties into sealed polyvinyl chloride (PVC) pipe and an inline fan. The fan holds the ground under your house at negative pressure relative to the rooms above, so radon follows the pipe up and out above the roofline instead of seeping through the floor. A follow-up test records the new level. Our own PA DEP-certified crew designs and installs the system.
Free estimatePA DEP-certified mitigation firmPost-mitigation test
4.0
pCi/L EPA action level
fix homes at or above this level1 Day
Typical installation
for most York homes
PA DEP certified radon mitigation
Who you are calling
Radon Systems Designed Around York Foundations
No two foundations move soil gas the same way. Take a 1920s rowhome downtown on fieldstone, a 1970s split-level with block walls in West York, and a newer poured basement over in East York. All three need different suction points, different fan sizes and different pipe routes. That is why a good installation starts with an on-site look instead of a number pulled off a price sheet.
We look at the slab, the sump pit, the drain tile and how the walls were built, then run a sub-slab communication test to measure how far suction actually travels under the floor. Those readings settle everything else. They decide where the suction point goes and whether one is enough. They pick the fan that moves that much air quietly. They even decide whether the pipe climbs the outside wall, cuts through the garage or hides in a closet.
- Communication testing first Suction spread beneath the slab gets measured before a fan or a suction point is chosen.
- Fan outside living space Fans mount in the attic, garage or outdoors, never in a basement or any room you use.
- Exhaust above the roofline The pipe discharges above the eave and clear of windows, doors and neighboring openings.
- Labeled and easy to check A finished system has a U-tube manometer, a label and instructions you can actually follow.
PA DEP data
York County Radon System Costs and Results
- Median system cost, 2024 to 2026
- $1,150
- Standard sub-slab system (599 systems)
- $1,175
- Median radon before → after
- 12.0 → 1.0 pCi/L
- Systems below 4.0 afterward
- 97.5%
PA DEP records 749 York County systems with a post-mitigation test from 2024 to 2026. 50.9% of them cost between $935 and $1,320.
Source: Pennsylvania DEP, data.pa.gov. Retrieved October 21, 2026.
When to call
Signs Your York Home Needs a Radon System
Radon cannot be seen or smelled, so the clues are in your test results, your system and your foundation. Note your latest radon number and when the test was taken.
(717) 275-0074 - 01
A Test at or Above 4.0 pCi/L
The Environmental Protection Agency (EPA) recommends fixing any home at or above 4.0 picocuries per liter (pCi/L), or 148 Bq/m³. A solid short-term or long-term result at that level is the clearest reason there is to put in a system.
- 02
A Result Between 2.0 and 4.0 pCi/L
The EPA suggests weighing a system in this range. It matters more when someone spends real hours in the basement or lower level every week.
- 03
A Home Inspection Turned Up Radon
High radon during a York home sale is routine. A system put in before closing, backed by a follow-up test, keeps the deal from stalling.
- 04
A Capped Pipe With No Fan
If there is a radon pipe in your basement or attic with nothing pulling on it, that system is passive and often cannot lower the level on its own.
The right method for the home
Radon Systems We Install in York Homes
The EPA treats active soil depressurization as the most effective way to cut radon. The right version depends on your foundation.
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Sump Pit and Drain Tile Suction
When a home already has perimeter drain tile, sealing the sump and pulling through it can reach the entire foundation at once.
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Crawl Space Sub-Membrane Systems
Heavy sheeting sealed across a dirt or gravel crawl space floor, with the fan pulling from underneath, blocks radon from the rooms overhead.
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Block Wall Suction
Hollow block walls can hold radon inside their cores. Where readings call for it, suction goes on the wall as well as the slab.
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Multiple Suction Points
Big houses, added-on rooms and slabs poured over packed soil often need two or more points feeding a single fan.
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Passive System Activation
Plenty of newer York homes came with a capped radon pipe already in place. Adding the right fan to it usually drops the level sharply.
What you get
What Our Radon System Installation Includes
Every job includes all of the following. Nothing here is an extra added on once we are already at your home.
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Site Visit and Written Scope
Suction points, fan model, pipe route, fan location, discharge point and final price are all agreed on paper with us before work starts.
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Suction Point and Radon Fan
The slab gets cored, the suction pit dug, the pipe sealed where it enters, and a correctly sized fan hung outside your living space.
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Sealing and Labeling
Reachable cracks, the sump lid and other openings get sealed, then the system is labeled and fitted with a U-tube manometer.
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Follow-Up Test
Once the fan has run at least 24 hours, a follow-up radon test records the reduction. We include it in your written quote.
How the job runs
Our Radon System Installation Process
Every installation follows a home-specific plan, from the first radon number to the verified result.
- 1 Step 1
Send Your Radon Result
Give us your ZIP code and test result. Our PA DEP-certified team reviews it and calls you to set up a visit.
- 2 Step 2
Inspect and Design
We study the foundation, run a sub-slab communication test, then settle the pipe route and the price with you.
- 3 Step 3
Build the System
The suction point gets cored, PVC run, fan hung, disconnect wired, openings sealed and everything labeled.
- 4 Step 4
Prove the Result
A follow-up radon test runs after 24 hours or more of operation, and we go over that number with you.
Free estimates · PA DEP-certified radon mitigation firm
High Radon in York? Book a Free System Estimate
Send over your radon result and a few notes about the foundation. Our certified crew sets a site visit and puts a firm price in writing.
Upfront pricing
What a Sub-Slab System Costs
Typical York ranges for a complete radon system, installed in 1 to 2 days. We confirm your price in writing.
Most popular
Standard Sub-Slab System
$875–$1,500 single poured basement or slab
- Communication test and written system design
- One suction point, fan and roofline discharge
- Crack and sump sealing, manometer and label
- Follow-up test: confirm it is in the quote
Multi-Point System
$1,500–$1,900 larger or divided foundations
- Two or more suction points on one fan
- Block wall suction where readings call for it
- Higher-capacity fan when the readings demand it
- Follow-up test: confirm it is in the quote
Complex Foundation
$1,900–$2,200 stone walls or basement plus crawl space
- Fieldstone and rubble wall sealing
- Sealed membrane and suction for crawl spaces
- Multiple fans or interior pipe routes
- Follow-up test: confirm it is in the quote
The final price rides on foundation type, how well suction spreads under the slab, the pipe route and electrical access. We confirm it in writing before install day.
Health and household safety
A Safer Home After Radon Mitigation
A system built correctly runs quietly all day and all night, and every part of it is arranged to keep radon out of the air you breathe.
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Radon Leaves Above the Roof
Exhaust discharges above the roofline and away from windows, doors and air intakes, so the gas cannot circle back inside.
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Pressurized Pipe Stays Outside
The section of pipe on the pressure side of the fan sits outside your living space, so even a leak cannot push radon into a room.
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Simple to Monitor
One look at the U-tube manometer tells you the fan is pulling. An optional alarm can warn you the moment it stops.
Before, during, after
Getting Ready for Installation Day
Before the Visit
- Clear a walking path to the planned suction point, the sump pit and any wall the pipe will climb.
- Shift stored boxes and furniture at least three feet back from the slab work area.
- Make sure our crew can reach the garage, the attic hatch or the exterior wall on the chosen route.
- Have your radon report ready, and mention pets or anyone in the house bothered by dust and noise.
During the Visit
Most installs wrap up in one day. Coring the slab and cutting pipe gets loud and dusty in short bursts, which installers typically manage with vacuums and drop cloths. By the end, openings are sealed, the fan disconnect is wired, and the work area is swept up.
After the Work
The fan runs from the moment it is switched on. After at least 24 hours, a follow-up radon test records your new level. Learn to read the manometer, and retest every two years from there.
Keep radon levels low
Keeping Your New System Working
These systems ask almost nothing of you, but a few small habits protect the investment.
- 01
Check the U-tube manometer once a month. Liquid sitting at two heights means the fan is still pulling.
- 02
Never switch the fan off, and leave the electrical disconnect in the on position year round.
- 03
Reseal the sump lid any time a plumber services the pump, or the system starts pulling room air instead of soil gas.
- 04
Retest every two years, and again after a remodel, an addition or finishing off the basement.
York, PA local insight
Sub-Slab Systems for York Foundations
York County rests on Piedmont bedrock and soils that release radon as uranium inside them breaks down, and the county carries an EPA Zone 1 rating, the highest potential category on the EPA map of radon zones (opens in a new tab). That does not mean every house here tests high. It does mean high results turn up often enough that a radon system is one of the more common safety upgrades homeowners take on locally.
The foundation decides the system. A lot of York homes have poured or block basements with a sump pit and perimeter drain tile. In those, one well-placed suction point often reaches the whole slab. Older city homes with fieldstone walls and uneven floors usually need more sealing work and a more careful look at fan sizing. Split-levels and houses with additions often combine a basement, a slab and a crawl space under one roof. Each of those areas may want its own suction point or its own membrane.
The Pennsylvania DEP Radon Division (opens in a new tab) sets 6 requirements every mitigation contractor in Pennsylvania has to meet. The contractor performs a visual inspection before submitting a bid. Sump pits that admit soil gas get covered and sealed, with a radon-resistant drain where no other floor drain exists. Openings around vent pipe penetrations through the slab, foundation walls and crawl space membrane get cleaned and sealed airtight with compatible caulk. Floor-wall joints, perimeter channel drains and slab cracks get sealed with urethane caulk or equivalent. Floor and condensation drains discharging into soil below the slab receive a radon-resistant drain. The installer holds current DEP certification. Radon Mitigation York is a PA DEP-certified mitigation firm, and our own crew meets every one of these requirements.
Before any system gets designed, your number needs to be solid. Professional radon testing gives you hourly data and written conditions instead of a single mailed-in average. Does your house have a sump pit or a finished lower level? The basement radon mitigation page walks through sump sealing and interior pipe options in more detail.
Already have a system that is not holding the level down? A radon system repair call or a radon fan replacement is usually faster and cheaper than starting over. Want to picture what the suction under your slab is actually doing? Read how sub-slab radon mitigation works, or head back to radon mitigation in York to book a free estimate.
Local radon standards
Why Choose Our Certified Crew for Radon System Installation
We combine accurate radon data, a system designed for your foundation, clean installation and a follow-up test that proves the result.
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PA DEP-Certified Crew
Pennsylvania requires DEP certification to install radon systems for hire. We are a PA DEP-certified mitigation firm. Ask us for our certification number.
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Built to the Standards
Fan placement, discharge height, labeling and sealing should all follow Pennsylvania Department of Environmental Protection (DEP) requirements and ANSI/AARST mitigation standards.
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Know What to Ask For
We write the scope, the price, the fan model and the follow-up test into your agreement.
Where we work
Where We Install Systems
We cover York and its bordering neighborhoods: West York, North York, East York, Valley View, Grantley. Call with your address to confirm the next available appointment.
- West York 17404
- North York 17404
- East York 17402
- Valley View 17402
- Grantley 17403
York ZIP codes served
- 17401
- 17402
- 17403
- 17404
Radon Mitigation York
805 E Prospect St, York, PA 17403
Mon to Fri: 8:00 AM to 6:00 PM · Saturday: 9:00 AM to 2:00 PM
Straight answers
Radon System Installation FAQs
Need help with a detail not covered here? Call (717) 275-0074.
(717) 275-0074 A complete sub-slab system usually runs $875 to $2,200 in York. Poured concrete basements fall at the low end. Historic stone foundations, block wall depressurization, multi-point suction and crawl space encapsulation push toward the high end. We give you the actual quote in writing.
The EPA reports that active soil depressurization can cut radon by as much as 99 percent. A sound design normally puts a home well under the 4.0 pCi/L action level, and a follow-up test records exactly where it landed.
The fan always goes outside the living space, usually on an exterior wall, in the garage or up in the attic. We pick the pipe route during the site visit and agree on it with you before anything gets cut.
No, a correctly sized fan on solid mounts gives off a low hum that most people stop noticing within a week. Exterior and attic locations run quietest from inside the house.
Residential radon fans generally draw somewhere between 15 and 150 watts depending on the model, which is about what a bulb or two would use running nonstop.
Our own crew at Radon Mitigation York, a firm certified by the Pennsylvania Department of Environmental Protection (DEP). We quote, install and stand behind our own work.
Free estimate · Written quote
Book Your Certified Radon System Install
Bring your level down with a sub-slab system matched to your foundation, a quiet fan, and a follow-up test that proves it worked. Send us your ZIP and result for a free quote from our certified crew.
Sources
- Pennsylvania DEP, Radon Test Results, September 1986 to Current (data.pa.gov)
- Pennsylvania DEP, Radon Mitigation System Year, 1987 to Current (data.pa.gov)
- U.S. EPA, Consumer's Guide to Radon Reduction
- U.S. EPA, Radon publications (A Citizen's Guide to Radon, Home Buyer's and Seller's Guide)
- AARST, ANSI/AARST radon standards
- Pennsylvania Code, 25 Pa. Code Chapter 240, Radon Certification
Data retrieved October 21, 2026. Links, dates and methods for every source are on our sources and resources page.