Radon mitigation systems aren’t cheap, and they shouldn’t be. They require sophisticated technology to ensure your home is safe from the cancer-causing gas. A single system ranges from $1,200 to $1,700, but that can vary depending on the severity of radon levels. Some homes may need more than one system, some may require additional suction points, and some may need complex pipe routes.

When it comes to deciding who will pay for the radon system, it really depends on if you’re the buyer or the seller. If you own the home and are trying to sell it, chances are you’ll have to pay for it if you want anyone to buy. If you’re buying the home, you can probably get the seller to pay for the system by including it in the contract.