Radon Mitigation Granville OH | Licensed RC202 Pros

Photo by AI Generated (Grok Imagine)

If your Granville home tested above 4.0 pCi/L — the EPA action level — you need a permanent fix from a contractor who is actually licensed by the State of Ohio to do this work. Radon Eliminator holds Ohio Mitigation License RC202, and we lead with that number for a reason: under Ohio Administrative Code 3701-69, anyone installing a radon mitigation system in this state must be licensed. Many homeowners don't know to ask, and many contractors bury the credential. We don't.

We provide Radon Mitigation Granville OH services for single-family homes off Newark-Granville Road, historic homes near Broadway and the Denison University campus, newer builds in the Bryn Du and Erinwood developments, and commercial properties throughout Licking County. Whether you're a homeowner who just got a flagged inspection report, an agent trying to save a closing, or a property manager with statutory exposure on an apartment complex, we deliver the same thing: a code-compliant system, a clean install, and a documented post-mitigation result under 4.0 pCi/L.

Ohio has one of the highest radon exposure rates in the United States. Licking County sits in EPA Radon Zone 1 — the highest-risk designation — with predicted average indoor levels exceeding 4 pCi/L. Granville's clay-heavy soils and limestone bedrock create exactly the conditions radon exploits. This isn't paranoia; it's geology.

We're not a general contractor that added radon as a side service. Radon mitigation is what we do, and we do it across every property type Ohio law touches. Here is what separates the best radon mitigation Granville offers from the rest:

• Ohio License RC202 — verifiable through the Ohio Department of Health. We post it on the truck, the contract, and the system label.
• EPA-aligned protocols (ANSI/AARST SGM-SF-2017) — the national consensus standard for soil gas mitigation in single-family dwellings. No shortcuts on pipe sizing, manometer placement, or sealing.
• Closing-Date Radon Service — we schedule testing and installation around your purchase agreement, not our convenience. Most Granville real-estate jobs are installed within 5–7 business days of contract signing.
• Multi-vertical experience — residential homes, multi-family apartment buildings, commercial offices, and K–12 schools. If your radon problem is bigger than a basement, we have the diagnostic equipment and crew for it.
• Transparent pricing — typical Granville sub-slab depressurization systems run $1,250 to $1,800 depending on foundation type, run length, and exterior finish requirements. We quote in writing before any work begins.
• Post-mitigation testing included — every system is followed by a 48-hour continuous radon monitor test to prove the result. You get the data.

Competitors rarely match this combination. Most won't put their license number in writing, won't commit to a closing date, and won't include verification testing.

Photo by AI Generated (Grok Imagine)

Our scope covers every radon scenario a Granville property owner is likely to face.

The standard fix for Granville homes is active sub-slab depressurization (ASD). We core a 4- to 5-inch hole through the basement slab, set a suction pit, run schedule-40 PVC up through conditioned space or an exterior wall, and install an in-line radon fan (typically a RadonAway RP145, RP265, or GP series, sized to your foundation). The system is sealed at every slab penetration, fitted with a U-tube manometer, and discharged above the roofline per code. For homes with crawl spaces — common in older Granville Township properties — we install vapor-barrier sub-membrane depressurization.

Commercial buildings and multi-family properties are a different animal. Larger slabs, multiple foundation sections, HVAC interactions, and elevator pits all change the design. We provide multi-point ASD systems, block-wall depressurization for CMU foundations, and HVAC-integrated pressurization for larger facilities. We also handle the documentation schools and apartment owners need to satisfy disclosure and duty-of-care obligations.

We deploy continuous radon monitors (CRMs) that produce hour-by-hour data over a 48-hour minimum closed-house protocol — the testing method real-estate transactions require. For longer-term assessment, we offer 90-day alpha-track devices. Every mitigation we install ends with a verification test; if the post-install number isn't comfortably below 4.0 pCi/L, we adjust the system at no charge.

Inherited a system from a previous owner? Bought a Granville home with a 15-year-old radon fan that's barely humming? We inspect existing installations, test current performance, and upgrade undersized fans, failed manometers, or non-code discharge points. Many older systems were installed before the current ANSI/AARST standards and need rework to actually pass a re-test.

Closing in 10 days and the radon test just came back at 6.8 pCi/L? Call us. Our Closing-Date Radon Service prioritizes transactional jobs. We can typically be on-site within 48 hours for a site assessment, install within a week, and deliver post-mitigation results in time for the buyer's contingency window.

Every job follows the same disciplined sequence. No improvisation, no surprises.

1. Phone consultation and quote. We ask about your foundation (full basement, crawl, slab-on-grade), the test result, and your timeline. Most Granville homes get a firm written estimate within the same day.
2. On-site diagnostic visit. We assess sub-slab communication using a smoke pencil and pressure-field extension test, identify the optimal suction point, and finalize the routing plan. Exterior runs on historic homes near downtown Granville are routed to preserve architectural sightlines.
3. Installation. A typical single-family system installs in 4 to 6 hours. We core the slab, set the suction pit, run PVC, mount the fan (always outside conditioned space per ANSI/AARST), wire to a dedicated circuit, install the manometer, seal all visible slab cracks and openings, and label the system.
4. Post-mitigation verification. A continuous radon monitor runs in the lowest occupied level for at least 48 hours. You receive the data report with hour-by-hour readings.
5. Documentation and warranty. You get the installation diagram, license number, fan specs, warranty paperwork (5 years on the fan, lifetime on the system design), and the post-mitigation test result — everything a buyer, lender, or appraiser will ask for.

Granville sits on the western edge of the Allegheny Plateau, where glacial till meets Devonian shale and limestone bedrock. That geology — especially the fractured limestone that underlies much of Licking County — is one of the strongest natural radon producers in Ohio. The Ohio Department of Health's county-level data consistently shows Licking County homes testing well above the state average.

We see specific patterns in Granville: older homes near the Granville Historic District frequently have stone-and-mortar foundations with significant air pathways; mid-century homes off Cherry Valley Road tend to have block-wall basements that require interior sealing in addition to ASD; newer developments around Bryn Du Mansion and out toward Welsh Hills often have sealed concrete slabs but still pull radon through expansion joints and plumbing penetrations. We've installed systems in every foundation type Granville builds.

We also serve the surrounding area — Newark, Heath, Pataskala, Johnstown, New Albany, and east into Hebron and Buckeye Lake. Whether you searched Radon Mitigation near me, Radon Mitigation Granville near me, or asked your inspector for the top Radon Mitigation Granville provider, you're getting the same licensed Ohio crew.

We believe in stating the number. Generic ranges help nobody.

• Standard basement ASD system: $1,250 – $1,550
• Basement + crawl space combination: $1,650 – $2,100
• Crawl-space only (sub-membrane): $1,750 – $2,400
• Block-wall depressurization add-on: $400 – $700
• Interior routing through finished space: add $200 – $500
• 48-hour continuous monitor test (standalone): $150 – $185
• Commercial / multi-family / school: quoted after site visit

Financing is available for qualified homeowners. For real-estate transactions, we can invoice directly to the title company at closing. That removes the upfront cost barrier and keeps the deal moving.