---
title: "Radon Mitigation for Home Sales in York, PA (Before Closing)"
canonical: "https://radonmitigationyorkpa.net/services/real-estate-radon-mitigation/"
pubDate: "2026-10-01T00:00:00.000Z"
updatedDate: "2026-10-03T00:18:00.000Z"
author: Radon Mitigation York PA
description: "Radon over 4.0 on the inspection test? We install, retest and send clearance paperwork before your York closing date. Call (717) 356-3035."
---

# Radon Mitigation for Home Sales in York, PA (Before Closing)

If the inspection radon test came back at or above 4.0 pCi/L, you can still close on time. Our radon mitigation for a home sale in York, PA covers the install, the 24-hour wait and the clearance retest, all scheduled around your contract dates. Call [(717) 356-3035](tel:+17173563035) any time for a same-day callback and a free written quote.

We are DEP-Certified Installers and we work only in York and the surrounding York County area. This page covers the real estate side of our [radon mitigation York PA](/) service for buyers, sellers and agents.

## What's included in a before-closing radon job

A home sale job is a normal radon mitigation system with tighter scheduling and more paperwork. Here is what you get:

- **Free written quote** based on a site visit or the inspection report, sent fast so it fits inside your negotiation window.
- **Closing-deadline scheduling.** Tell us the settlement date and the contingency deadlines. We plan the install and retest backward from those dates.
- **Installation in one day for most homes.** That usually means a sub-slab depressurization system: a suction point in the slab, sealed PVC piping, a radon fan outside the living space, and a manometer (U-tube gauge) so anyone can see the system is running.
- **Post-install clearance test** run no sooner than 24 hours after the fan starts and within 30 days, as EPA guidance and Pennsylvania testing rules require.
- **A paperwork packet** for the buyer, seller, both agents and the lender: the install details, the clearance result and our written guarantee.
- **Our written clearance guarantee.** If the clearance test is not below 4.0 pCi/L, we keep working at no charge. See [our clearance guarantee](/radon-mitigation-guarantee/) for the terms.

## When you need real estate radon mitigation

You need this service when a radon result lands in the middle of a sale and someone has to act before settlement. Common triggers:

- The buyer's inspection radon test reads 4.0 pCi/L or higher, the EPA action level.
- The result is between 2 and 4 pCi/L and the buyer wants it lower. EPA says to consider fixing homes in that range too.
- The seller tested before listing, found high radon, and wants the system in place before buyers walk through.
- The house already has a system, but the fan is dead, the U-tube reads zero, or a new test still comes back high.

If no one has tested yet, start with [professional radon testing in York](/services/radon-testing/). A certified test inside the inspection window gives everyone a result they can trust.

## Our process, from test result to closing

1. **Send us the result and the dates.** Call [(717) 356-3035](tel:+17173563035). Share the radon report, the settlement date and the end of the inspection or negotiation period.
2. **Free written quote.** We look at the home (or the inspection photos when time is short) and send a written price and install date. Agents can forward it right into the negotiation.
3. **Agreement and scheduling.** Once the buyer and seller agree who pays, we lock in the install date. We work with the listing agent for access.
4. **Install day.** Most systems go in within one day. We seal major slab openings and the sump if there is one, mount the fan, set the manometer and label the system.
5. **Wait at least 24 hours.** The system has to run before the clearance test can start, per EPA guidance and Pennsylvania testing protocols.
6. **Clearance test.** A short-term test of at least 48 hours, run under closed-house conditions with the fan on.
7. **Paperwork to everyone.** We send the results and documents to the agents, buyer, seller and lender so the file is complete before settlement.

From first call to clearance results, a typical timeline is about 5 to 10 days, depending on our schedule and the test method.

## Two ways to handle high radon in a deal

Most York sales settle a high radon result one of two ways: the seller installs a system before closing, or the seller gives the buyer a credit and the buyer installs after closing. Each has trade-offs.

| | Seller installs before closing | Credit at closing, buyer installs later |
|---|---|---|
| Who picks the installer | Seller (buyer may ask for approval) | Buyer |
| Clearance proof at settlement | Yes, if retest finishes in time | No, buyer tests after moving in |
| Timeline pressure | Must fit before settlement | None before settlement |
| Lender involvement | Usually none | Credit may be capped by the buyer's loan program |
| Buyer's control over system look and routing | Lower | Full |
| Seller's cost certainty | Fixed written quote | Negotiated amount |

Our guide on [radon credit at closing vs. seller-installed system](/radon-guide/radon-credit-vs-seller-mitigation/) walks through when each one makes more sense.

## Help for each side of the sale

### For buyers

You have the most leverage inside the inspection contingency, so test early. If the result is high, you can ask the seller to install a system with a passing clearance test before settlement, ask for a credit, or accept the home as is. If you ask for a seller-installed system, it is reasonable to request a DEP-certified mitigator, a written guarantee, and a copy of the clearance test results.

If the home already has a system, check that it is working and get a fresh test. A system that was installed years ago may have an older fan or may not have been tested since.

### For sellers

Testing before you list puts you in control. If you find high radon early, you can install on your own schedule and hand buyers a passing result. Remember that Pennsylvania's Seller's Property Disclosure Statement asks about radon, so known results belong on the form.

If the buyer's test comes back high, a fast written quote lets your agent answer the buyer's corrective proposal with real numbers. 

### For real estate agents

Your job is to keep the deal on schedule. We give agents a written quote fast, coordinate access with the listing side, and send the clearance results to both agents as soon as they are ready. Because we keep our phone open 24 hours, you can call after a showing or late inspection. Our [radon guide for York real estate agents](/radon-guide/radon-guide-for-real-estate-agents/) covers test timing, contingency language and common problems.

One problem worth knowing about is interference with the test itself. Opened windows, a moved monitor or a fan pointed at the device can change the result. Read more about [radon test tampering in a home sale](/radon-guide/radon-test-tampering-home-sale/) and how certified testers catch it.

## What affects the price of a before-closing system

We never quote a price without seeing the home's details. Our typical range for real estate jobs is `$935 to $1,320`. For a wider view, Pennsylvania cost guides, including PA DEP's radon guide for home buyers and sellers, commonly cite roughly $800 to $2,500 for a standard system in an existing home. Your written on-site quote sets the real number.

Factors that move the price:

- **Foundation type.** Basement slab, crawl space, slab on grade, or a mix of all three.
- **Sub-slab material.** Gravel under the slab moves air easily. Packed clay or wet soil may need more suction points.
- **Pipe routing.** Exterior routing up the side of the house is common. Interior routing through a closet or garage can cost more.
- **Sump pits and openings.** A sump needs a sealed, airtight cover.
- **Starting radon level.** Very high readings may need a stronger fan or extra suction points.

For a full breakdown, see [radon mitigation cost in York](/radon-mitigation-cost/).

## Radon and home sales in York

York County sits in [EPA Radon Zone 1](https://www.epa.gov/radon/epa-map-radon-zones-and-supplemental-information), the highest-potential category. In practice, that means radon results above 4.0 pCi/L are a routine part of buying and selling here, and many local buyers expect a radon test as part of the inspection.

The local housing stock matters too. York has many older brick and stone homes with fieldstone or block foundations, plus newer homes on poured slabs. Older basements with dirt floors, block walls and open sumps can need more work to seal. We plan for that on the quote, so there are no surprises on install day.

Season matters as well. Winter tests often read higher because the house is closed up and warm air rises and pulls soil gas in. That is one reason a mitigation system, not a single low test, is the better long-term answer.

Pennsylvania law also shapes the process. Anyone who tests or mitigates radon for someone else in Pennsylvania must be certified by the [PA DEP Radon Division](https://www.pa.gov/agencies/dep/programs-and-services/radiation-protection/radon-division) under the Radon Certification Act. Ask any installer, us included, for their certification number.

## Why choose us for a home sale

### DEP-certified work that holds up in the file

Pennsylvania requires radon mitigators to be certified by the Department of Environmental Protection, and buyers and lenders can check that certification. Our installers carry PA DEP certification, and we put the number on the quote, the system label and the final paperwork. That gives the buyer's agent something concrete to verify, and it means the install and clearance test follow Pennsylvania's rules.

### A written clearance guarantee

A system that does not pass its clearance test can stall a closing. Our written guarantee says the clearance test will come in below 4.0 pCi/L, or we keep working at no charge until it does. Sellers know the cost is fixed. Buyers know the system has to perform, not just get installed. The guarantee is in writing and goes into the same packet as the test results, so both agents and the lender can see it before settlement day.

### Scheduling built around your closing date

Real estate radon jobs are about the calendar. We ask for your settlement date and contingency deadlines first, then plan the install, the 24-hour wait and the clearance test to fit. Most installs are done in one day. We are open 24 hours, so you can call after a late inspection and get a same-day callback. That keeps the buyer, seller and both agents working from the same timeline.

## Frequently Asked Questions

### Is high radon a deal breaker?

Rarely. Radon is one of the more fixable inspection findings, because most systems go in within a day and a retest confirms the result. In York, most deals handle it with a seller-installed system or a credit at closing. Read our guide: [is high radon a deal breaker when buying a house](/radon-guide/is-radon-a-deal-breaker/).

### Who pays for radon mitigation, the buyer or the seller?

It is negotiated through the inspection contingency. In Pennsylvania deals, the buyer usually asks the seller to install a system before closing or to give a credit. The seller can agree, counter, or refuse, and the buyer then decides. See [who pays for radon mitigation: buyer or seller](/radon-guide/who-pays-for-radon-mitigation/).

### Do sellers have to disclose radon in Pennsylvania?

Yes, if they know about it. The Pennsylvania Seller's Property Disclosure Statement asks about radon tests, results and any mitigation system. Sellers do not have to test, but known results and systems belong on the form. Our page on [Pennsylvania radon disclosure rules for sellers](/radon-guide/pa-radon-disclosure-law/) explains what to share.

### Can mitigation be finished before closing?

Yes, if it is scheduled quickly. Plan for the install (usually one day), a wait of at least 24 hours, then a clearance test of at least 48 hours. Send the results to both agents and the lender. Read more about [getting radon mitigation done before closing](/radon-guide/radon-mitigation-before-closing/).

### Should I buy a house that already has a radon system?

Usually, yes. An existing system is a plus in a Zone 1 county. Check the fan's age and noise, look at the manometer reading, ask for recent test results and find out who installed it. Then run your own test. See our guide to [buying a house with a radon mitigation system](/radon-guide/buying-a-house-with-a-radon-system/).

### How does the radon contingency work in a PA agreement of sale?

The buyer tests during the inspection contingency period. If radon is high, the buyer can accept the home, end the agreement, or send a written corrective proposal. The seller then responds within the negotiation period. Here is [how the radon contingency works in a PA purchase agreement](/radon-guide/radon-contingency-pennsylvania/).

### Does a radon system hurt resale value?

Generally no. In a Zone 1 county like York, many buyers expect to see a radon system, and a working one with recent passing results can make a home easier to sell. A high test with no plan is the bigger problem. Learn more: [does a radon system affect home value](/radon-guide/does-a-radon-system-affect-home-value/).

### Should radon be tested during the home inspection?

Yes. Order the radon test at the same time as the home inspection so results land inside the contingency window. That leaves time to negotiate a system or credit. Use a PA DEP-certified tester for reliable results. Read more about [radon testing during a home inspection](/radon-guide/radon-testing-during-home-inspection/).

## Closing date coming up? Call today

A high radon result does not have to move your settlement date. Call [(717) 356-3035](tel:+17173563035) any time, or [request your free written quote online](/contact/). Send us the test result and your closing date, and we will call back the same day with a plan that fits.