Statewide Iowa Realtor Resources
Iowa Real Estate Radon Resources
Statewide radon testing and mitigation support for Iowa realtors, brokers, and MLS members. Closing-timeline turnarounds, Iowa Code disclosure compliance, and NRPP-certified partner contractors across 22 Iowa cities.
Iowa Radon Disclosure Law for Real Estate Transactions
Iowa Code Section 558A.4 governs Residential Real Estate Disclosure. Sellers are required to disclose known radon test results to buyers as part of the standard Iowa Residential Property Seller Disclosure Statement. While Iowa does not legally mandate pre-sale testing, the Iowa Association of Realtors (IAR) and the Des Moines Area Association of Realtors (DMAAR) both recommend radon testing as standard real estate transaction practice given Iowa's #1-in-the-nation indoor radon levels.
Key disclosure requirements under Iowa law:
- If radon testing has been performed at the property, the seller must disclose the date and result.
- If a radon mitigation system is installed, the seller must disclose the installation date and any recent verification testing.
- Sellers cannot legally withhold radon information they possess about the property.
- The penalty for failing to disclose known radon issues includes potential rescission of the sale and damages.
Iowa Association of Realtors recommends including a radon contingency clause in every Iowa Real Estate Purchase Agreement, allowing buyers to: (1) conduct radon testing during the inspection period, (2) require seller mitigation if results exceed 4 pCi/L, (3) negotiate cost responsibility, and (4) terminate the agreement if mitigation cannot be completed within the closing timeline.
ALA Risk Framework · Use in disclosure conversations
Source: American Lung Association Healthcare Provider Decision Support Tool (2024) + EPA A Citizen's Guide to Radon (EPA 402/K-12/002). Smoker-radon risk is multiplicative (~9× non-smoker risk at each exposure level) due to synergistic effect between tobacco-related lung damage and alpha-particle radiation from radon decay products.
The American Lung Association Risk Framework — A Realtor's Disclosure Tool
Iowa Code §558A.4 requires disclosure of known radon results — but the legal floor is only half the story. The American Lung Association (ALA) maintains the most-cited residential radon risk framework in the United States, and Iowa realtors who can speak to ALA's risk model in a disclosure conversation move buyers from "should I worry?" to "let's address it" faster than any other tool.
ALA Lifetime Lung Cancer Risk by Radon Exposure
The ALA Healthcare Provider Decision Support Tool (2024) models lifetime lung cancer risk from chronic radon exposure for both non-smokers and current smokers, by radon level. The data below — sourced from ALA + EPA — is the framework realtors can cite when a buyer asks "is 4 pCi/L really that bad?"
| Indoor radon (pCi/L) | Never-smoker lifetime risk | Smoker lifetime risk | ALA / EPA recommendation |
|---|---|---|---|
| 1.3 (US avg) | ~2 in 1,000 | ~20 in 1,000 | No action required |
| 2.0 | ~4 in 1,000 | ~32 in 1,000 | Consider mitigation (esp. smokers / children) |
| 4.0 (EPA action level) | ~7 in 1,000 | ~62 in 1,000 | Mitigate — install active radon system |
| 8.5 (Iowa state avg) | ~15 in 1,000 | ~120 in 1,000 | Urgent mitigation |
| 10.0 | ~18 in 1,000 | ~150 in 1,000 | Urgent mitigation; consider interim ventilation |
| 20.0+ | ~36+ in 1,000 | ~260+ in 1,000 | Emergency mitigation; limit time in affected levels |
How to frame a radon disclosure conversation with a buyer or seller
The ALA framework gives realtors a defensible, third-party-authority script for radon-disclosure conversations. Three usage patterns:
- For sellers with elevated test results: "Iowa Code requires you to disclose this reading. The ALA risk model says a never-smoker at this level has [X in 1,000] lifetime lung cancer risk attributable to radon, and the EPA recommends mitigation. Pre-listing mitigation typically costs $800-$2,500 and converts the disclosure from a sale-killer to a sale-accelerator — verified-mitigated homes close faster and at full price."
- For buyers facing an elevated inspection result: "This is a routine Iowa transaction issue. The ALA framework places a 4.0 pCi/L home at 7-in-1,000 lifetime risk for non-smokers, and the EPA recommends mitigation as soon as practical. We have NRPP + IDPH-certified partner contractors who can install + verify within the 7-14 day window most contingencies allow. Most Iowa sellers cover this cost."
- For sellers considering whether to pre-test before listing: "Iowa is #1 in indoor radon. The ALA framework predicts ~5 in 7 Iowa homes will test elevated. Pre-testing surfaces the issue under your control rather than under buyer-side closing pressure — a pre-mitigated home with verified post-test documentation typically closes faster and at higher price than a home with an elevated test result mid-transaction."
ALA radon resources: lung.org/radon · ALA Iowa: lung.org/ia · EPA A Citizen's Guide to Radon: epa.gov/radon
Iowa Real Estate Radon Transaction Timeline
Standard Iowa transaction timeline from initial test through verified post-mitigation result, designed to fit within most inspection contingency windows.
| Day | Step | Who | Duration |
|---|---|---|---|
| Day 0 | CRM deployed at property during home inspection | Inspector / mitigation specialist | Instantaneous |
| Day 2-4 | Test retrieval + result reporting | Inspector / mitigation specialist | 48-96 hr test period |
| Day 4 | Result review — elevated (>4 pCi/L) triggers mitigation | Realtor + buyer + seller | 1 day |
| Day 5-7 | On-site assessment by NRPP-certified mitigator | Partner contractor | 1-2 hr visit |
| Day 7-9 | Written quote provided + cost negotiation | Realtor + buyer + seller | 2-3 days |
| Day 9-12 | Mitigation system installed | Partner contractor | 4-8 hours on-site |
| Day 13-16 | Post-mitigation verification test | Partner contractor | 48-96 hr test |
| Day 16 | Verification result + final documentation | Partner contractor | 1 day |
| Day 16+ | Closing proceeds with verified mitigation | Closing agent | Per contract |
Services We Provide to Iowa Realtors
- Pre-listing radon testing — Recommend to sellers before MLS listing to surface and mitigate radon issues upfront. Avoids mid-transaction surprises.
- Pre-purchase radon testing — Buyer-side testing during inspection contingency period. CRM-based for transaction-grade documentation.
- Closing-timeline mitigation — Expedited 7-14 day install + verification turnaround. Designed for active transactions.
- Existing system verification — Confirms that a previously-installed radon mitigation system is still maintaining indoor radon below 4 pCi/L. Standard practice for transfers of homes with existing systems.
- FHA / USDA / VA loan compliance documentation — Test reports and verification documentation in lender-acceptable formats.
- New construction RRNC consulting — Iowa builder coordination on Radon-Resistant New Construction features per Iowa builder code recommendations.
- Multi-property portfolio testing — Iowa property managers, REIT, and rental portfolio owners.
Iowa MLS Coverage Areas
Iowa Radon Experts partner network serves the major Iowa MLS regions:
- Des Moines Area Association of Realtors (DMAAR) — Des Moines, West Des Moines, Ankeny, Urbandale, Johnston, Clive, Waukee, Pleasant Hill
- Cedar Rapids Area Association of Realtors — Cedar Rapids, Marion, Hiawatha, Iowa City corridor
- Iowa City Area Association of Realtors — Iowa City, Coralville, North Liberty, Tiffin
- Quad City Area Realtor Association — Davenport, Bettendorf, plus Illinois Quad Cities
- Ames Board of Realtors — Ames, Story County
- Cedar Valley Board of Realtors — Waterloo, Cedar Falls, Black Hawk County
- Sioux City Board of Realtors — Sioux City, Woodbury County
- Council Bluffs Area Association of Realtors — Council Bluffs, Pottawattamie County
- Dubuque Area Association of Realtors — Dubuque, Dubuque County
- North Iowa Board of Realtors — Mason City, Cerro Gordo County
- Marion County Realtors — Pella, Knoxville
Statewide partner contractor coverage available for properties outside the 22 directly-served cities.
Realtor FAQ
Iowa Real Estate Radon Questions Realtors Ask
Frequently Asked Questions
Does Iowa law require radon testing before a home sale?
Iowa does not legally require pre-sale radon testing, BUT Iowa Code requires sellers to disclose any KNOWN radon test results to buyers. Iowa Code Section 558A.4 governs Residential Real Estate Disclosure. In practice, most Iowa real estate transactions now include a radon contingency clause in the purchase agreement, and the Iowa Association of Realtors (IAR) recommends testing as standard practice. Many lenders — particularly FHA-backed loans — increasingly require radon testing as a condition of loan approval in high-radon zones.
What is the standard radon testing protocol for Iowa real estate transactions?
For real estate transactions, EPA recommends a short-term test (48-96 hours) using either a charcoal canister or continuous radon monitor (CRM) under closed-house conditions. The CRM method is preferred for transactions because it provides hour-by-hour readings that can detect tampering (windows opened during the test) and supplies a defensible time-stamped result for closing documentation. Iowa Radon Experts partner contractors use AARST-NRPP-certified Femto-TECH and Sun Nuclear CRMs for all transaction testing.
If a radon test comes back elevated, can mitigation be completed before closing?
Yes. Standard Iowa real estate transaction radon mitigation timeline: Day 0 — test result received (elevated, >4 pCi/L); Day 1-3 — partner contractor on-site assessment; Day 3-5 — written quote provided; Day 5-7 — buyer/seller agreement on cost responsibility; Day 7-10 — mitigation system installed (typically 4-8 hours of on-site work); Day 11-14 — post-mitigation verification test conducted; Day 14 — final report ready for closing documentation. The full cycle typically takes 7-14 days, fitting within most Iowa real estate transaction inspection contingency windows.
Who typically pays for radon mitigation in an Iowa real estate transaction?
Iowa Association of Realtors data suggests roughly 60% of radon mitigations in Iowa transactions are seller-paid, 30% are negotiated cost-share or credit-at-closing arrangements, and 10% are buyer-paid. The Iowa Real Estate Purchase Agreement does not mandate which party pays — this is negotiated between buyer and seller after an elevated test result. Many Iowa listing agents now recommend pre-listing radon testing so sellers can either mitigate proactively or price-adjust before listing, avoiding mid-transaction disputes.
Are FHA loans different on radon requirements in Iowa?
HUD Handbook 4000.1 does not require radon testing for FHA-backed loans as of 2026, but HUD strongly encourages radon testing on all FHA-insured properties. Some FHA underwriters in high-radon states (Iowa is #1 nationally) request radon test results during underwriting, and many Iowa FHA lenders include radon testing as part of standard inspection requirements. USDA Rural Development loans similarly encourage testing. VA loans do not require radon testing but VA appraisers may flag elevated radon as a property condition issue. New construction homes with builder warranties commonly include radon-resistant construction (RRNC) per Iowa builder code recommendations.
Can radon testing be done at the same time as a home inspection?
Yes, and this is the standard Iowa practice. Most Iowa home inspectors place a continuous radon monitor (CRM) during the inspection and retrieve it 48-96 hours later when they return for the final inspection report walkthrough. Some inspectors are certified to provide radon testing themselves; others coordinate with partner radon companies like the Iowa Radon Experts network. Coordinating testing with inspection compresses the transaction timeline.
Does an existing radon mitigation system need to be tested before transfer of ownership?
Best practice — yes. Iowa Association of Realtors recommends post-mitigation verification testing whenever a home with an existing radon system changes ownership. This confirms the system is functional and currently maintaining indoor radon below the EPA action level of 4 pCi/L. Many Iowa real estate transactions include verification testing of existing systems as a buyer-protection step. If the seller cannot produce documentation of the original mitigation install plus regular biannual testing, buyers commonly request a current verification test as a condition of closing.
Iowa MLS — how should radon mitigation be disclosed in listing notes?
Iowa MLS listings should disclose: (1) Whether radon testing has been performed and the date + result, (2) Whether a radon mitigation system is installed and the installation date, (3) Date of the most recent post-mitigation verification test and the result. The DMAAR (Des Moines Area Association of Realtors) and Iowa Association of Realtors have provided guidance encouraging full radon disclosure on all Iowa MLS listings. Sellers who have proactively tested and mitigated typically command faster offers and higher closing prices because radon uncertainty is removed from buyer negotiations.
How does Iowa Radon Experts work with real estate agents?
Iowa Radon Experts is a lead-routing service that connects realtors and their clients with NRPP-certified, IDPH-registered partner contractors statewide. Realtors can request testing or mitigation services directly through our contact form or by calling our routing line. Standard turnaround: response within 4 business hours, on-site visit within 2-7 days, post-mitigation verification testing included. We do not pay referral fees — Iowa law prohibits paying real estate licensees for unlicensed work referrals. We do provide expedited closing-timeline scheduling at no premium for licensed Iowa realtors.
Iowa Realtor? Set Up a Direct Partnership Line.
Realtors get expedited routing, transaction-grade documentation, and direct partner contractor access for every Iowa listing. Call (319) 382-6040 or submit a quote request.