Helical and push piers both stabilize settling foundations. Which one is right depends on your soil profile, your foundation type, and what specifically is settling. There is no universal answer, and any contractor who recommends one without examining the site is selling, not advising.
Here is how to think about the choice.
What each one actually is
Helical piers
A helical pier is a steel shaft with one or more helical (auger-like) plates welded along its length. It is screwed into the ground using hydraulic torque, like a giant screw being driven into soil. The pier reaches load-bearing strata, the helix plates engage the soil, and the pier carries weight through skin friction along the shaft plus bearing pressure on the plates.
Push piers
A push pier is a hollow steel pipe driven straight down using hydraulic pressure, using the weight of the structure as resistance. The pier is driven until it hits refusal (typically bedrock or very dense soil), at which point it transfers load to that bearing layer.
Where each one works best
Helical piers work best when:
- The site has relatively shallow load-bearing soil within 15 to 25 feet of the surface.
- The structure is too light to drive push piers effectively (some additions, porches, or light commercial).
- The soil profile is consistent and predictable.
- The repair is on a newer foundation with adequate footing connection.
- The project is new construction or a planned addition where load is being added.
Push piers work best when:
- The site needs to reach deep bedrock for a stable bearing surface.
- The structure is heavy enough to drive the piers (most full residential foundations qualify).
- Soil conditions are variable and unpredictable.
- The existing footing is robust enough to accept the pier bracket.
- The settling is uniform and the goal is to stabilize and potentially lift.
Cost
In the CT and NY market:
- Helical piers: $1,800 to $3,500 per pier installed.
- Push piers: $1,800 to $3,200 per pier installed.
The costs are roughly comparable. The total project cost depends much more on how many piers are needed (typically 6 to 14 for a residential repair) than on which type is selected.
What homeowners often misunderstand
“Piers will lift my house back to level”
Sometimes. Often not all the way. Both pier types can be used in a lifting attempt after stabilization, but the success of the lift depends on how much rotation the structure has experienced, how rigid the foundation is, and how the load is distributed. Lifts of one to two inches are often achievable; lifts of four plus inches require more aggressive approaches and may compromise other structural elements (sheetrock cracks, door frames, plumbing).
Honest contractors tell you up front whether your settlement is correctable or whether stabilization at the current position is the realistic goal.
“Piers fix the cause”
They do not. Piers stabilize the symptom. The underlying cause (poor soil compaction, washout, leaking plumbing, tree root water draw) still needs to be addressed or the new piers will be carrying the same forces that the original footing failed under.
Diagnosis matters more than pier type
Most foundation settlement repair projects fail not because of the pier type chosen but because the underlying cause was never identified. Before any pier project, a competent contractor will document:
- The pattern of cracking and rotation.
- The history of any plumbing leaks, drainage issues, or significant tree growth or removal near the foundation.
- The soil profile and water table at the site.
- The condition of the existing footing.
We do this assessment as part of every free inspection. Written estimate before you commit, no pressure on the call.