Radon Mitigation in Westminster
A city on two counties, with tri-levels that stack three slabs at three heights — Westminster keeps radon work honest.
Radon Mitigation for Westminster Homes
Westminster straddles Adams and Jefferson counties, and we serve both sides of the line. The city's tri-levels stack slabs at three heights, its historic south side keeps post-war ranches — some with a dirt utility crawl behind the furnace — and Legacy Ridge and Bradburn add newer two-stories. Martens Radon fits the system to each: licensed RMT.0000225, free on-site assessment, written quote usually the same day, and most homes we mitigate end up below 2.0 pCi/L, well under the EPA action level of 4.0.
Where Does the Suction Point Go in a Westminster Tri-Level?
Where the slabs meet — placement decides whether one suction point treats the whole footprint, and that is exactly what the free assessment determines. It's the layout question that comes up most in Countryside's seventies tri-levels, and getting the junction right is what keeps the system from doing more excavation than the house needs.
Westminster is one piece of a much bigger coverage map — areas we serve across the metro covers the rest of Jefferson and Adams counties and beyond. Before you call, how mitigation systems work walks through the mechanics, and what drives the price breaks down what changes the number from one foundation to the next.
Which Westminster Neighborhoods Do We Serve?
Westminster's neighborhoods split across two counties and three decades of construction, from historic south-side ranches to Legacy Ridge two-stories, and the tri-level in between ties the whole city together.
Bradburn Village
New-urbanist blocks where discharge placement respects close neighbors.
Legacy Ridge
Nineties two-stories around the golf course, mostly full basements.
The Ranch
Established two-stories where the retrofit band is the usual fit.
Countryside
Seventies tri-levels — the three-slab placement question.
Shaw Heights
Post-war ranches on the historic south side.
Harris Park
Fifties ranches, occasionally with a dirt utility crawl.
Standley Lake corridor
Ranches and splits west toward the lake.
Westminster Station
New townhomes where a rough-in check comes first.
What Radon Mitigation Costs in Westminster
A single-level slab or a full basement is the standard retrofit case: $1,400–$1,800. Tri-levels usually land there too, with placement doing the extra work. A ranch that pairs its basement with a dirt utility crawl moves into the crawlspace band at $1,900–$2,800+ once a sealed membrane is involved, and a newer townhome with a capped rough-in needs 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.
Westminster Radon Questions
Our tri-level has slabs at three heights — does it need three systems?
Usually just one. Three slab heights sound like three separate problems, but what actually matters is where those slabs meet — that junction is where the suction point gets placed, and one well-positioned point can treat the whole footprint from there. The free on-site assessment is how we determine the right placement for your specific tri-level before quoting the job.
We're near Standley Lake — does the water change radon?
No. Radon comes from soil and rock beneath your house, not from surface water, so being near Standley Lake doesn't raise or lower your risk. Homes throughout the corridor and homes miles from the lake follow the same rule — what's under the foundation determines the reading, not what's nearby above ground. Testing your specific house is the only way to know your number.
Do you cover both the Adams and Jefferson sides of Westminster?
Yes, both. Westminster sits across two counties, and the county line doesn't change how we treat the job — we work the Adams County side and the Jefferson County side on the same terms: licensed RMT.0000225, free on-site assessment, and a written quote usually the same day. Which side of the line your address falls on doesn't change how we approach the system.
Our 1950s ranch has a basement plus a dirt crawl behind the furnace — two systems?
Usually just one system. We install a sealed membrane over the dirt crawl behind the furnace and route its suction point into the same fan that serves the basement side, so the two areas end up on one connected system rather than two separate installs. Because membrane work is part of the job, pricing falls into the crawlspace band rather than the standard retrofit band.
We're buying a home that already has a system — how do we know it works?
Two built-in indicators make it easy to check. Every compliant system has a U-tube manometer that shows vacuum at a glance, and Colorado regulations require a vacuum alarm as well, so the system itself tells you whether it's pulling. If you'd like a second opinion before closing, we can take a look at an existing system as part of a free on-site visit.
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.