--- title: Radon Credit at Closing vs. Seller-Installed System canonical: "https://radonmitigationyorkpa.net/radon-guide/radon-credit-vs-seller-mitigation/" pubDate: "2026-10-01T00:00:00.000Z" updatedDate: "2026-10-03T00:18:00.000Z" author: Radon Mitigation York PA description: "Should the seller install a radon system or give a credit at closing? Compare control, timing, proof and lender rules before you decide." --- # Radon Credit at Closing vs. Seller-Installed System A radon credit at closing is money the seller gives the buyer at settlement to pay for a radon system after the sale. The other common choice is [seller-installed radon mitigation before closing](/services/real-estate-radon-mitigation/), followed by a clearance test. A credit gives the buyer control and less time pressure. A seller-installed system proves radon is fixed before move-in. Neither choice is right for every sale. Here is how they compare and when each one tends to work best. ## How a radon credit at closing works After a high radon test, the buyer asks for a credit in a written corrective proposal during the inspection contingency. The amount is usually based on a written quote from a PA DEP-certified mitigator. If the seller agrees, the credit shows up on the settlement statement. After closing, the buyer hires an installer and pays for the system. **Watch for lender limits.** Many loan programs cap how much a seller can contribute toward a buyer's closing costs. If the buyer is already getting other seller help, a radon credit may push past that cap. In that case, a price reduction may be used instead. For example, [Fannie Mae](https://selling-guide.fanniemae.com/sel/b3-4.1-02/interested-party-contributions-ipcs) caps seller contributions on a primary home at 3%, 6% or 9% of the lower of the price or appraised value, depending on the down payment. FHA loans allow up to 6%. VA loans limit certain seller concessions to 4%, not counting normal closing costs. The buyer's lender can confirm what applies. ## How a seller-installed system works The seller hires a certified mitigator before settlement. The system goes in, usually in one day. After at least 24 hours of operation, a clearance test of at least 48 hours shows whether the level is below 4.0 pCi/L, the [EPA action level](https://www.epa.gov/radon). The seller sends the results and installer paperwork to the buyer and both agents. ## Side-by-side comparison | Factor | Credit at closing | Seller-installed system | |---|---|---| | Who chooses the installer | Buyer | Seller | | Proof radon is fixed at closing | No | Yes, if retest finishes | | Risk of closing delay | Low | Some, if scheduling slips | | Buyer controls pipe routing and fan location | Yes | Limited | | Lender contribution limits | May apply | Usually not an issue | | Buyer's cash out after closing | Yes, covered by credit | None | | Seller's cost certainty | Fixed credit amount | Fixed written quote | ## When a credit makes more sense - **Settlement is close.** If closing is days away, there may not be time for install plus retest. - **The buyer wants control.** Some buyers care where the pipe runs, how the fan looks or which installer does the work. - **The buyer plans other work.** If the buyer is finishing the basement or adding on, it can make sense to design the system around those plans. - **The seller is out of the area.** A credit avoids coordinating access and contractors from a distance. ## When a seller-installed system makes more sense - **The buyer wants proof first.** A passing clearance test before closing removes uncertainty. - **There is time.** Several days to two weeks before settlement is usually enough. - **Lender limits are tight.** A seller-installed system avoids adding to seller contributions. - **The seller wants a clean file.** Fixing the issue now means fewer questions from future buyers or appraisers. ## How to protect yourself either way ### If you take a credit (buyers) - Base the number on a written quote, not a guess. - Book the install soon after you move in. The credit only helps if the system gets installed. - Use a PA DEP-certified mitigator and ask for a clearance test. ### If the seller installs (buyers) - Ask for a certified mitigator by name in the agreement. - Require a clearance test below 4.0 pCi/L before settlement. - Get copies of the installer's certification number, system details and any written guarantee. ### If you are the seller - Get a written quote right away so you can compare a credit with installing. - Pick an installer who guarantees the clearance result in writing. That limits your risk if the first retest is high. ## A quick note on cost Pennsylvania cost guides commonly cite roughly $800 to $2,500 for a standard system in an existing home. A written on-site quote sets the real number, and both a credit and a seller-installed system should be based on that quote. ## Agents: set expectations early Agents can save everyone time by explaining both options before the radon test results come in. Our [radon guide for York real estate agents](/radon-guide/radon-guide-for-real-estate-agents/) covers test timing, contingency language and how to keep the closing on schedule. ## Key takeaways - A credit gives the buyer control and avoids closing delays. - A seller-installed system gives proof that radon is fixed before closing. - Lender limits can affect how large a credit can be. - Base either option on a written quote from a certified mitigator. - Choose based on time to settlement and how much control the buyer wants. ## Frequently Asked Questions ### How much is a typical radon credit? It is usually based on a written quote for the specific home. Credits vary with the foundation, pipe routing and starting radon level. ### Can the buyer and seller split the cost? Yes. Some deals split the cost of a system or a credit. Anything both sides agree to in writing can work. ## Need a quote for your negotiation? We provide free written quotes that work for either a credit or a seller-installed system. Call [(717) 356-3035](tel:+17173563035) any time for a same-day callback.