Many newer Cincinnati homes have a passive radon vent pipe stubbed into the slab. Activating it (adding a fan) is the cheapest path to mitigation, $700-$1,200 typically. Sump pumps similarly can be sealed and integrated into the system.
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EPA notes that many builders include radon-resistant features in some of their homes, so some newer houses in Hamilton, Butler, Warren, and Clermont counties have a passive 3-inch or 4-inch PVC vent pipe stubbed through the slab and routed up through the home to the roof. "Passive" means no fan; the pipe relies on natural draft alone, and EPA rates passive subslab suction at typical reductions of 30 to 70 percent, compared with 50 to 99 percent once a fan makes it active. Activating one (adding an inline fan to the existing stack, sealing the slab penetration, wiring to a dedicated circuit, mounting a manometer) is a 3-4 hour job, $700-$1,200 fixed. Sump pits are similarly an opportunity: a sealed sump pit lid with a gasketed pipe penetration becomes part of the suction network. The on-site assessment identifies which feature exists and writes the quote against that scope. Cincinnati construction note: whether a newer Mason, West Chester, or Loveland house has a passive radon pipe depends on the builder and the model, so look before assuming. When present, the pipes are commonly stubbed in a closet or utility-room chase and capped or visibly running through a finished surface. Activation requires a credentialed mitigator because the existing stack diameter and routing may need modification to support an active fan; do not just connect a fan to the stub.