Investor · Las Vegas, NV · Member since 2013 · 8k+ posts · 10k+ votes
7y
That’s insane high (I think safe is less than 6?) but Radon fixes are cheap, especially in unfinished basements less than $5k would be my guess. . It’s usually just a pvc pipe with a fan.
I’d ask seller to fix it as they will have to disclose it once they know.