Radon Mitigation Cost in Spokane

Who: Owner-occupied single-family homes inside Coeur d'Alene city limits, low or moderate household income (2026 HUD limit for four people: $82,800).

What: Grants up to $5,000 per person per year. The program paid for radon mitigation systems in 2025, and the city's 2026 action plan, submitted to HUD, lists them among typical projects. First come, first served, for 12 to 16 households a year.

Who: Owner-occupied homes inside Spokane city limits with household income under 80% of the area median (2026: $88,400 for four people).

What: Free or low-cost health and safety repairs; owners over 60 above half the area median pay a share on a sliding scale. The city announced grants of up to $6,000 in 2024. Larger repairs: city loans of $10,000 to $50,000.

Who: Low- and moderate-income owners in Spokane County outside the City of Spokane, including Spokane Valley, Liberty Lake, Cheney, Airway Heights, Medical Lake and Deer Park.

What: Aimed at immediate health and safety hazards. The 2026 budget is $200,000 for about 100 people.

Who: Low-income homeowners in eligible rural areas of Washington (up to 200% of the federal poverty level or 80% of the area median). Spokane County has no listed agency.

What: State grants for repairs that address health and safety, including “hazard remediation.” Priority goes to seniors, residents with disabilities, families with children under five and veterans.

Who: Owner-occupants of homes in USDA-eligible rural areas with very low income who cannot get affordable credit elsewhere. FY2026 limit for 1 to 4 people: $55,250 in Spokane County, $48,500 in Stevens, Pend Oreille, Ferry, Lincoln and Adams, $51,550 in Whitman, $51,750 in Kootenai, $44,000 in Bonner.

What: Loans up to $40,000 at a fixed 1% over 20 years. Grants up to $10,000 only for owners 62 or older. The money must remove health and safety hazards.

Where: On USDA's map, Spokane, Spokane Valley, Airway Heights, Mead, Coeur d'Alene, Post Falls and Hayden lie outside the eligible area. Cheney, Liberty Lake, Medical Lake, Deer Park, Pullman, Rathdrum and the smaller towns farther out lie inside it. Edges can run through a neighborhood. Check your address.

Who: Owner-occupied homes in Kootenai County with income up to 80% of the area median (2026: $82,800 for four people).

What: Repairs for health, safety, accessibility or home preservation, as funds allow. Owners help with the work and may have to repay the cost under the program’s terms.

Bring your test report and ask whether a result of 4.0 pCi/L or more counts as a health and safety hazard. HUD's own guidance helps: “Costs for radon testing and mitigation are considered eligible program costs for many HUD grant programs.” (HUD Notice CPD-23-103, January 11, 2024). The local program's rules still decide.

Idaho's health department advises: “Ask for a radon test during the home inspection. If levels are high, negotiate to have a mitigation system installed.” Real estate tests →

Washington's Department of Health mails free kits to owners and renters while supply lasts; allow 8 to 10 weeks. Idaho DHW sends one per address every two years when in stock. Testing options →

Usually doesn’t cover mitigation. We found no utility, Washington or Idaho radon rebate.

Federal rules say: “Prohibited: Using DOE WAP H&S funds for radon mitigation.” They may allow limited testing and cover sump pits and dirt floors.

They go to states and tribes. EPA: “not available to individuals or homeowners.”

The home improvement credit (25C) ended for work after December 31, 2025, and never listed radon. IRS Publication 502 doesn’t name radon as a medical expense; ask a tax professional.