Radon Mitigation in Denver
Pre-war bungalows, post-war ranches, brand-new rough-ins — Denver's radon work is as varied as its blocks, and we fit the system to the house.
Radon Mitigation for Denver Homes
Denver's oldest neighborhoods were built decades before anyone had heard of radon, and their brick foundations and dug-out basements leave soil gas plenty of pathways. Martens Radon installs mitigation systems across the city — licensed RMT.0000225, free on-site assessment, written quote usually the same day — and designs each one for the house it is on: discreet routing on narrow lots where houses sit ten feet apart, color-matched exterior runs, and most homes we mitigate end up below 2.0 pCi/L, well under the EPA action level of 4.0.
Can a 1920s Denver Bungalow Be Mitigated?
Yes — brick foundations and dug-out basements change where the suction point goes, not whether mitigation works. It's exactly the kind of foundation we see throughout Washington Park and Park Hill, and the free on-site assessment is how we work out the right placement before quoting the job.
Denver is just one piece of a much larger coverage map — see every area we serve for the rest of it. Want more before you call? Start with the complete Denver radon guide or the Denver homeowner cost guide, and how these systems work covers the technical side.
Which Denver Neighborhoods Do We Serve?
Denver's housing stock spans pre-war bungalows, post-war ranches, and brand-new construction, often within the same few blocks, so the right radon approach depends on which one you've got.
Washington Park
Pre-war bungalows and Tudors with dug-out basements.
Park Hill
Brick foundations that predate radon awareness by decades.
Berkeley
Narrow lots where pipe routing has to be planned, not improvised.
Sloan's Lake
A mix of originals and new infill, often side by side.
Congress Park
Classic Denver squares with full basements.
Montclair
Older stock with the occasional dirt utility crawl.
Harvey Park
Fifties ranches, slab and basement both.
University Hills
Post-war ranches where the retrofit band is the usual fit.
Central Park
Newer builds, many with a capped passive rough-in.
Green Valley Ranch
Newer stock where activation is often all that's needed.
What Radon Mitigation Costs in Denver
A dug-out or full basement under brick is the standard retrofit case: $1,400–$1,800. Homes with a dirt-floor crawl — common behind Montclair and Congress Park originals — move into the crawlspace band at $1,900–$2,800+ when a sealed membrane is involved. Newer homes with a capped rough-in usually need only activation: $550–$850.
Passive System Activation
Homes built with a capped rough-in pipe
$550–$850
Standard Retrofit System
Most slab or basement homes
$1,400–$1,800
Crawlspace System
Sealed membrane + sub-membrane suction
$1,900–$2,800+
What Every Martens Radon Install Includes
Every quote covers the complete job: all materials, the new fan, and debris disposal. Every system ships with a U-tube manometer and a vacuum alarm, as Colorado regulations require, so you can see at a glance that it is pulling. Exterior runs are finished with color-matched downspout transitions — including custom 3D-printed parts where a standard fitting will not fit the house. Ivan stands behind his own workmanship for as long as Martens Radon is in business, and the fan carries its own manufacturer warranty. A follow-up radon test is available if needed or wanted.
Denver Radon Questions
My neighbor in Park Hill tested low — does that mean my house is fine?
No. Radon varies house to house, sometimes even between two houses on the same block, so one low reading nearby doesn't predict yours. The EPA estimates that nearly half of Colorado homes test above 4 pCi/L statewide, which shows how much variation exists even within one area. Testing your own house is the only way to know your actual number.
Where does the pipe go on a narrow Denver lot?
It depends on the house and the lot. Routing options include an exterior run finished in a color-matched downspout transition, a route through the garage, or — when standard fittings don't fit the house — a custom 3D-printed transition piece. Which option makes sense for a narrow lot is exactly what the free on-site assessment is for; Ivan decides based on the specific layout.
Our Central Park home has a capped pipe in a closet — what is that?
That's a passive radon rough-in — a capped pipe the builder installed during construction, ready for a fan later if a test ever comes back high. Activating it means adding the fan and the required wiring, and that runs $550–$850. That's the price for activation only, not what a full retrofit costs, since the pipe itself is already in place.
I'm selling my Denver home and the inspection flagged radon — what now?
Start with the free on-site assessment — Ivan walks the house, and you'll typically have a written quote the same day, which is often exactly what a real estate deadline requires. From there, scheduling gets worked out based on the specific job and the timeline your transaction needs.
Do you really cover all of Denver from Golden?
Yes. We work across Denver regularly, right from our Golden base — it isn't occasional or out of the way for us. Denver is a routine, frequent part of the territory we cover, not a special trip. If your home is in Denver, you're well within the area we work in week to week.
Start With the Free Assessment
Ivan comes out, walks the home, and you get a written quote — usually the same day. No cost, no obligation.