Radon Mitigation in Highlands Ranch, CO

The Most Uniform Housing Stock We Work In

Highlands Ranch is a single master-planned build-out running from the early 1980s to the mid 2000s, and the consistency is unusual. Full basements are close to universal, they were almost all sold unfinished, and a large majority have been finished since by owners. That means the same below-grade room that radon concentrates in has, in house after house, been converted into a bedroom, an office or a media room. Uniform stock makes the pattern unusually visible here.

Dawson Formation Ground

Northern Douglas County sits on the arkosic sandstones of the Dawson Formation — coarse, feldspar-rich sediment shed off the mountains — rather than on the heavy claystones beneath central Denver. It is considerably more permeable. Gas migrates through it toward a foundation instead of stalling in dense clay, and that combination of permeable ground plus a deep occupied basement is the reason readings in this part of the metro so often surprise people who assumed newer meant safer.

Finishing a Basement Is a Reason to Retest

This is the local trigger worth repeating, because it applies to so many houses here at once. Finishing a basement changes the space from somewhere you walk through to somewhere you sleep, and the work itself alters how the floor breathes — sealing, new flooring, framing against the walls, sometimes a bathroom cut into the slab. If the last test predates the finish, it describes a different house. A retest after that work is one of the clearest cases there is.

Knowing the Model Is a Head Start, Not a Quote

Because the elevations repeat, we usually have a good idea of the likely pipe route before arriving, and that genuinely speeds things up. It does not replace looking. Two identical elevations can have different sub-slab material, a different addition on the back, and a suction point that works in one and not in the other. We will happily tell you what we expect from the model. We will not price it from the model.

Passive Stubs in the Later Phases

Some of the later build-out has a capped pipe running from beneath the slab into the attic; the earlier phases generally do not. It is worth a look in the mechanical room and the attic before assuming either way, because finding one changes the cost of a system considerably. Either way the sequence is unchanged: test, fix if the number says so, test again.

Highlands Ranch Radon FAQs