Helical Piers in Denver, CO: Cost & When to Use Them (2026)
If an inspector or contractor has told you that your Denver home needs helical piers, you're probably wondering how that's different from push piers, whether you actually need piers at all given how much Front Range clay heaves rather than settles, and what a fair price per pier looks like. Piers are a real structural fix, but they're designed for settlement, and using them on a foundation that's primarily heaving from expansive clay can be the wrong tool. Here's how to tell the difference and what the engineering and cost should look like.
By Jason Green · Foundation Repair · Published August 28, 2026 · 8 min read
Helical piers vs push piers
Helical piers are steel shafts with helix-shaped plates welded on, twisted into the ground like a large screw until they reach load-bearing soil or bedrock. They can be installed without waiting for the structure's own weight to drive them in, which makes them useful on lighter structures, additions, and some deep foundations where soil conditions are known.
Push piers (also called resistance piers) are hydraulically driven into the ground using the weight of the house itself as resistance, then locked in place and used to lift and support the foundation. They're common for underpinning existing single-family foundations that have settled, since they rely on the building's mass to reach load-bearing strata.
Why heave changes the equation in Denver
Piers are engineered to stop a foundation from settling further, or to lift a settled section back toward level. They work by transferring the load down to stable soil or bedrock below the reach of moisture swings.
But if your foundation's movement is heave, clay swelling and pushing sections of the foundation upward rather than down, adding rigid piers doesn't address the cause and can create new stress points where a heaving section meets a piered, stabilized section. In heave-driven cases, the better first step is usually moisture management: fixing grading, extending downspouts, and controlling irrigation near the foundation, sometimes paired with void space maintenance under slabs rather than piering. This is a well-documented distinction in Colorado's geotechnical and construction-defect history, and it's the main reason a Denver-specific evaluation matters more here than in most other US markets.
Why an engineer needs to be involved
Denver's Community Planning and Development department generally requires permit applications for pier installation to include engineer-stamped drawings specifying pier type, spacing, and load calculations. That's not just a bureaucratic step, it's the check that should catch a heave-vs-settlement misdiagnosis before piers go in the ground.
Ask whether the pier plan came from a Colorado-licensed PE who actually reviewed soil and moisture history at your address, not a generic layout applied to every job. If a company sells and installs piers without independent engineering review, get a second opinion before signing.
What drives per-pier cost in Denver
Cost per pier depends on depth needed to reach stable bearing soil or bedrock, which varies significantly across the metro, access around the foundation, and whether it's a helical or push pier system. Homes on hillside lots in areas like parts of Lakewood or Littleton with walkout basements sometimes need deeper or more piers due to slope and soil layering.
A full underpinning job typically needs anywhere from 6 to 14 piers depending on the length of the affected wall and the severity of movement, so ask for a per-pier price and the total pier count separately, not just a bundled number.
Getting a second opinion before you commit
Because piering is one of the more expensive and permanent foundation interventions, and because misdiagnosing heave as settlement is a documented problem on Front Range clay, it's worth getting an independent structural evaluation before committing to a full pier job. Our full Denver foundation repair guide covers how to interpret an inspection and what a soils report adds to that picture.
You can also compare up to three vetted local pros by entering your ZIP code to get multiple opinions on whether piers are the right call for your specific foundation and soil conditions.
Typical cost ranges
| Helical pier, installed (per pier) | $1,600 - $2,800 |
| Push/resistance pier, installed (per pier) | $1,300 - $2,200 |
| Engineer evaluation and stamped pier plan | $450 - $950 |
| Permit fee (Denver CPD, structural) | $150 - $500 |
| Typical full underpinning job (6-14 piers) | $10,000 - $30,000 |
| Deep pier installation (hillside/walkout lots, per pier) | $2,200 - $3,500 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
Are helical piers better than push piers in Denver?
Neither is universally better. Helical piers are often preferred for lighter loads and additions, while push piers use the house's own weight and are common for underpinning settled single-family foundations. The right choice depends on your soil, load, and an engineer's evaluation.
Can piers make a heaving Denver foundation worse?
They can if the movement is actually clay heave rather than settlement. Piers are designed to stop downward movement or lift a settled section, not to counteract soil swelling upward, so an accurate diagnosis matters before piers are installed.
Does helical pier installation need a permit in Denver?
Yes. Structural pier installation requires a building permit through Denver CPD, generally with engineer-stamped drawings specifying pier spacing and load calculations.
How many piers does a typical Denver foundation repair need?
Most full underpinning jobs use between 6 and 14 piers depending on the length of the affected foundation wall and severity of the movement, though smaller localized repairs may need fewer.
How deep do helical piers need to go in Denver soil?
It varies by location and can range from around 10 feet to well over 20 feet depending on where stable bedrock or load-bearing soil sits, which is why a site-specific engineering evaluation matters more than a flat depth estimate.
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