A radon mitigation quote should read like a contract, not a sticky note. The price means very little without the scope behind it. This page is the line-by-line checklist of what a complete Colorado mitigation quote includes — what to look for, what to ask about, and what to walk away from.
The 14-item checklist
Every honest Colorado mitigation quote covers each of these. Print this page if it helps — or screenshot it and compare line by line against the quote in your email.
- 1. Contractor's full legal business name and address. Not just a logo.
- 2. DORA radon mitigation license number. Required for any contractor performing mitigation in Colorado.[1] Verifiable at the DORA license lookup.
- 3. NRPP or NRSB certification number. National professional credential, verifiable at nrpp.info or nrsb.org.[2]
- 4. Number and location of suction points. If your home is multi-zone, "diagnostic test to be performed before install" is the right answer.
- 5. Specific fan model. RadonAway RP145, GP500, HS-series, Fantech, or equivalent. Not "an inline fan."
- 6. Fan warranty length. Typically 5 years on a name-brand fan. EPA notes most manufacturer warranties don't exceed five years.[3]
- 7. Pipe size and routing. 3-inch or 4-inch Schedule 40 PVC, interior or exterior, where it exits the home, and how high above the roofline or eave.
- 8. Sealing scope. Slab cracks, sump pit cover, floor-wall joint, plumbing penetrations — each itemized.
- 9. Manometer install. Where it goes, and that it's accessible and visible from a normal walking path.
- 10. Permit responsibility. Pikes Peak Regional Building Department covers most of El Paso County and requires permits for the electrical work.[4] The contractor should pull it.
- 11. Post-mitigation test. Within 30 days of install, no sooner than 24 hours after the fan is running, 2–7 day duration, closed-house conditions.[3] The quote should specify the target — a result below 4.0 pCi/L is the standard.
- 12. Workmanship warranty. Typically 1–2 years on labor, separate from the fan warranty.
- 13. Itemized add-ons. Electrical sub-panel work, drywall repair, aesthetic options, debris removal — each priced separately, not buried.
- 14. Total price with tax and payment terms. Including deposit, balance due timing, and acceptable payment methods.
Required-by-Colorado items
A few items are specifically required by Colorado regulation, not just industry best practice:
- DORA license. Colorado requires anyone performing radon mitigation for hire to be licensed by the DORA Office of Radon Professionals.[1] No exceptions for "handyman" work.
- Electrical permit. Radon fan installation involves electrical work — running a dedicated circuit if needed. Pikes Peak Regional Building Department requires electrical permits for this work in most jurisdictions they cover.[4]
- Real estate disclosure. If you install mitigation on a home you later sell, Colorado SB23-206 (CRS § 38-35.7-112) requires you to disclose the system to buyers along with prior test results and the CDPHE radon brochure.[5] Keep the install documentation in a safe place.
Items often hidden in fine print
Watch for these — they're not always called out clearly:
- Post-mitigation test fee. Sometimes priced as a separate $125–$200 line item rather than included.
- Electrical sub-panel work. If your panel is full, the contractor may need to install a sub-panel ($150–$400+). This should be a line item, not a surprise.
- Drywall touch-up after interior routing. Some contractors patch but don't paint. Some don't patch at all.
- Crawlspace debris removal. If they have to clear the crawlspace before installing the barrier, that's labor — $150–$500.
- Replacement fan after warranty. Not part of the original quote, but worth understanding: replacement fans run $150–$400 in parts plus labor every 5+ years.
Warranty language to look for
Two warranties matter, and they're separate:
- Workmanship warranty — how long the contractor stands behind the install. 1–2 years is standard; some Colorado contractors offer 5 years.
- Fan manufacturer warranty — typically 5 years on a name-brand fan (RadonAway, Fantech, Festa). EPA notes these warranties rarely exceed 5 years.[3]
Beyond those two, look for a written statement that the system will reduce radon below 4.0 pCi/L as verified by the post-mitigation test, and a path forward if it doesn't (additional suction point added at no charge, etc.).
The contractor's email lists: business name and DORA license number, NRPP certification number, one suction point in the southwest corner of the basement, a RadonAway RP145 fan with 5-year warranty mounted on the exterior north wall, 4-inch Schedule 40 PVC routed up the exterior wall to 12 inches above the roof eave, sealing of two visible slab cracks and the sump pit lid, a manometer mounted at the suction point visible from the basement stairs, electrical permit handled by the contractor, post-mitigation test scheduled within 30 days of install with target below 4.0 pCi/L, 2-year workmanship warranty, total of $1,650 including tax and 50% deposit. That's a complete quote — every item from the checklist accounted for.