{
  "slug": "radon-mitigation-cost",
  "title": "Radon Mitigation Cost Calculator",
  "heading": "Radon Mitigation Cost Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/radon-mitigation-cost",
  "summary": "Sub-slab depressurization system cost by house complexity and fan type.",
  "description": "Radon mitigation for most homes uses an active sub-slab depressurization system — a vent pipe routed from beneath the foundation slab up through the house (or along an exterior wall) to a roof-mounted exhaust fan that continuously pulls radon gas from beneath the home and vents it safely above the roofline. This calculator prices the system using a base cost for a straightforward single-point system, an adjustment for house complexity (multiple foundation types like a basement plus a slab-on-grade addition often need multiple suction points), and fan type since some systems need a more powerful fan for larger or leakier slabs. 2026 US national averages run about $800-$1,500 for a basic single-point radon mitigation system on a simple ranch-style slab, and $1,500-$2,500+ for homes with multiple foundation types, crawl spaces requiring a vapor barrier system, or larger homes needing a higher-capacity fan and multiple suction points. Every system should be tested by the installer after completion to confirm radon levels have dropped below the EPA's recommended action level of 4 pCi/L.",
  "formula": "Total = Base System Cost + Complexity Adjustment (multiple foundation types/suction points) + Fan Upgrade (if needed).",
  "dateModified": "2026-09-06",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=radon-mitigation-cost",
  "inputs": [
    {
      "id": "baseCost",
      "label": "Base single-point system cost",
      "kind": "number",
      "hint": null,
      "default": 950,
      "unit": "$",
      "min": 500,
      "max": 2000
    },
    {
      "id": "foundationComplexity",
      "label": "Foundation type",
      "kind": "select",
      "hint": null,
      "default": "0",
      "options": [
        {
          "value": "0",
          "label": "Single slab or basement — no extra suction points"
        },
        {
          "value": "600",
          "label": "Mixed foundation (basement + slab-on-grade) — +$600"
        },
        {
          "value": "1100",
          "label": "Crawl space + slab combo — +$1,100"
        }
      ]
    },
    {
      "id": "fanUpgrade",
      "label": "Fan capacity",
      "kind": "select",
      "hint": null,
      "default": "0",
      "options": [
        {
          "value": "0",
          "label": "Standard fan — no upcharge"
        },
        {
          "value": "250",
          "label": "High-capacity fan (larger/leaky slab) — +$250"
        }
      ]
    }
  ],
  "outputs": [
    {
      "id": "totalCost",
      "label": "Total radon mitigation cost",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "baseCost",
      "label": "Base single-point system",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "foundationComplexity",
      "label": "Foundation complexity adjustment",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "fanUpgrade",
      "label": "Fan capacity upgrade",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Base single-point system cost: 950 $",
      "Foundation type: Single slab or basement — no extra suction points",
      "Fan capacity: Standard fan — no upcharge"
    ],
    "outputs": [
      "Total radon mitigation cost: $950",
      "Base single-point system: $950",
      "Foundation complexity adjustment: $0",
      "Fan capacity upgrade: $0"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter base single-point system cost ($).",
      "Enter foundation type.",
      "Enter fan capacity.",
      "Read your total radon mitigation cost on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "baseCost": 550,
        "foundationComplexity": "0",
        "fanUpgrade": "0"
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "baseCost": 950,
        "foundationComplexity": "0",
        "fanUpgrade": "0"
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "baseCost": 1500,
        "foundationComplexity": "0",
        "fanUpgrade": "0"
      }
    }
  ],
  "limitations": [
    "Results are estimates before tax, fees, and inflation unless an input explicitly covers them.",
    "Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.",
    "This is educational maths, not financial advice. Check anything contractual with the lender or your accountant."
  ],
  "faq": [
    {
      "q": "What radon level requires mitigation?",
      "a": "The EPA recommends taking action at 4 pCi/L or higher, and considers mitigation worth discussing with a professional even between 2-4 pCi/L — since radon is the second-leading cause of lung cancer in the US, many mitigation professionals recommend acting at the lower threshold too."
    },
    {
      "q": "How long does radon mitigation installation take?",
      "a": "A standard single-point system typically installs in a single day (4-8 hours), including drilling the suction point through the slab, routing PVC pipe to the roofline, and installing and testing the exhaust fan."
    },
    {
      "q": "Does every home need multiple suction points?",
      "a": "No — most single-foundation homes on a continuous slab or basement floor need only one suction point, since the sub-slab gravel layer typically allows suction to pull evenly across the whole area; homes with separate foundation sections (like additions) often need a second point to achieve even depressurization."
    },
    {
      "q": "Is radon mitigation a one-time cost or does it need ongoing maintenance?",
      "a": "Installation is a one-time cost, but the system uses a continuously running fan (small electricity cost, similar to a light bulb) that has a typical lifespan of 5-10 years and will need periodic replacement, plus most experts recommend retesting radon levels every 2 years to confirm the system is still working effectively."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/crawl-space-encapsulation-cost",
    "https://www.revenuelab.fyi/toolbox/sump-pump-installation-cost",
    "https://www.revenuelab.fyi/toolbox/attic-fan-installation-cost"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Radon Mitigation Cost Calculator (https://www.revenuelab.fyi/toolbox/radon-mitigation-cost)"
}