You got a quote for $4,500 and your gut says it's too much. Or maybe a quote for $1,200 that feels too cheap. Either way, you want to know whether the price is fair before you sign.
The short answer: a Colorado mitigation quote that lines up with the right scenario, lists scope in writing, and comes from a DORA-licensed contractor is almost certainly fair — even if it feels high.[1] Most "too high" quotes turn out to be reasonable when you check what's actually in them. Here's how to run the check.
The short test
Match your home to the right scenario. If your quote falls inside that band, it's probably fair.
| Your home | Fair Colorado Springs range | Median |
|---|---|---|
| Basic basement, single suction point | $900–$1,900 | $1,400 |
| Finished basement, interior routing | $1,400–$2,800 | $1,900 |
| Crawlspace, sub-membrane system | $1,800–$4,000 | $2,600 |
| Multi-zone (tri-level, basement + crawlspace) | $2,200–$4,800 | $3,200 |
If your quote is significantly above the high end of your scenario, ask what's driving it. If it's below the low end, ask what's missing.
Why "too high" usually isn't greed
Most quotes that feel too high turn out to be honest. Common drivers:
- Diagnostic test found tight soil or poor sub-slab communication. A second suction point adds $300–$700 in materials and labor.
- Larger fan is needed. A GP500 or HS-series fan costs more than an RP145. Colorado altitude correction can push a contractor to spec up.[2]
- Crawlspace work was hidden in your basement. Some homes have a partial crawlspace under a single room (often a kitchen addition). If a contractor noticed and is including it, that's a feature, not padding.
- Interior routing through finished space. An extra $200–$600 on top of a basic install.
- Heavier vapor barrier in a crawlspace. 10–20 mil costs more than the old 6-mil minimum.
- Real estate deadline scheduling. Same-day or guaranteed-by-closing service carries a small premium.
When "too high" really is too high
A few red flags that should make you pause:
- The quote is a flat number with no written scope description.
- The contractor can't or won't provide a DORA license number or NRPP/NRSB certification.[1]
- The quote includes "required upgrades" that the contractor can't explain technically.
- The contractor uses fear-based language ("urgent," "danger to your family," "act today for this price").
- The post-mitigation test isn't included.
- The warranty is shorter than 1 year on workmanship or 5 years on the fan.
- Cash-only or no written quote at all.
The sanity-check tree
Step 1 — Match your scenario
Look at the table above. Which scenario describes your home? If your quote is inside that band, skip to step 4. If it's above, keep going.
Step 2 — Read the written scope
What's the contractor proposing? Single suction point or multiple? Interior or exterior routing? Heavy vapor barrier in a crawlspace? Each of those moves the price.
Step 3 — Ask the question
Email or call the contractor and ask: "I'm comparing this quote to a baseline of [your scenario's band]. What's pushing this above the range?" A legitimate contractor will explain — usually it comes back to soil, suction points, fan sizing, or scope you hadn't considered.
Step 4 — Get a second quote on the same scope
The strongest sanity check is a second written quote with the same scope. Send the second contractor the first quote's scope summary and ask them to price the same work. If the prices come in close, your original quote was fair. If the second comes in much lower, ask the first contractor to explain the difference.
A homeowner with a finished walk-out basement plus a small crawlspace under the laundry room got a $4,500 quote and called for a second opinion. The second contractor came out, ran a pressure field extension test, and confirmed the soil communication was poor. Both contractors ended up proposing two suction points plus a sub-membrane system for the laundry crawlspace. The second quote came in at $4,300. The $200 spread was warranty length and fan model. The original $4,500 quote was fair — it just looked high because the homeowner had been mentally anchored to the $1,000–$2,000 CDPHE baseline, which doesn't apply to multi-zone homes.
What "too low" should make you ask
A quote significantly below the band for your scenario isn't automatically a problem — but it's worth asking what's not included. Common reasons a quote runs low:
- Passive radon rough-in from new construction (saves real money)
- Simple porous-gravel soil that doesn't need a larger fan
- Exterior routing favored over interior
- No finished surfaces to protect
And the reasons that should give you pause:
- Post-mitigation test not included
- No written workmanship warranty
- No DORA license number on the quote
- "Cash discount" pricing with no written scope
- Contractor is willing to skip the electrical permit to save you money (don't)