The short answer
| Compared | Pressed concrete | Steel push | Helical | Drilled concrete |
|---|---|---|---|---|
| How it goes in | Precast concrete cylinders pressed down one on top of another, using the house’s weight | Steel pipe sections driven down with a hydraulic ram, using the house’s weight | A steel shaft with screw plates turned into the ground | A hole drilled to depth, filled with reinforced concrete, sometimes belled at the bottom |
| What stops it | Refusal: the house starts to lift instead of the pier going down | Refusal, measured as ram pressure | Torque at the target depth | The depth the plan specifies |
| Depth it can reach | Shallower; friction stops it in dense clay | Deeper; thin steel slips past friction | Set by the plan; extensions added as needed | Set by the plan; limited by the drill and rock |
| Record you can ask for | Depth per pier | Depth and pressure per pier | Depth and torque per pier | Depth and concrete placed per pier |
| Typical price | $1,000 per pier (Angi) | $2,000 per pier (Angi); $990–$1,350 per pier (Olshan, contractor) | $2,000–$4,000 per pier (HomeGuide) | $765–$1,100 per pier (Olshan, contractor) |
Across all types, Fixr puts piers at $1,000–$3,000 per pier. The spread on Austin quotes, from a few hundred dollars to several thousand per pier, mostly comes from that table plus the depth each pier has to go.
What matters more than the pier type
Depth below the active zone. The top layer of clay swells and shrinks with the weather; deeper down, moisture stays steadier. A pier that stops inside the moving layer moves with it. The Foundation Performance Association, a Houston-based association of foundation professionals, warns that shallow piling can continue to settle as seasonal moisture changes. On Austin’s east side, where Houston Black clay opens cracks 1/2 to 4 inches wide in dry periods, that moving layer can be deep.
Placement and spacing. Piers go along the beams that dropped, spaced so the beam can span between them. Too few and the beam sags between piers; too many and you’re paying for support you don’t need. The plan should show every pier on a drawing.
Records. Once the holes are backfilled, the pier log is the only evidence of how deep each pier went and what it stopped on. Ask for it before you sign, not after.
Drainage. Piers carry the house down to stable ground, but the clay around and under the slab still moves. The FPA says piers will not prevent uplift unless designed to, so a plan for a heaving area should deal with water, not only with piers.
The warranty terms. Some contractors tie warranty coverage to the pier type or to the pressure each pier reached at installation. Read which piers are covered and for what.
Call to schedule an inspection
Pressed concrete piers
The most common pier in Central Texas, and usually the least expensive per pier. Short precast cylinders are stacked in a hole beside or under the beam and pressed down with a jack, using the house as the weight, until they won’t go further. A cap and shims transfer the load.
The catch is depth. In stiff clay, friction along the sides can stop a concrete pier before it reaches stable soil, and the reading looks like refusal either way. Ask how deep the contractor expects them to reach on your lot, and what they’ll do if they stop shallow.
Steel push piers
Steel pipe is driven down in sections with a hydraulic ram. Because the pipe is narrow, it slips past side friction and tends to go deeper than concrete, and the ram pressure at refusal gives a number you can write down. Angi puts them around $2,000 per pier; Olshan lists $990–$1,350 per pier for slab work. Angi’s pier and beam guide also notes that the soil changes the bill: three to five steel piers in dense clay with shallow bedrock cost around $6,000–$10,000, less than the same set in loose or sandy soil.
Call to schedule an inspection
Helical piers
A steel shaft with one or more helix plates is screwed into the ground with a hydraulic motor. The torque needed to turn it tells the installer how much load it can carry. HomeGuide lists $2,000–$4,000 per pier, and Angi calls helical the most expensive type at around $3,000 per pier. They don’t rely on the house’s weight to install, which helps on lighter structures such as porches and additions.
Drilled concrete piers
A crew drills a shaft to a specified depth, places steel, and fills it with concrete; some designs bell out the bottom for a wider base. Drilled piers are designed rather than driven to refusal, so the depth comes from the plan, and the engineer’s design matters more here than with any other type. On the west side of Austin, drilling may reach limestone at modest depth, where the city describes shallow, limestone or caliche soil.
Call to schedule an inspection
East side, west side
| Compared | East of the escarpment | West of the escarpment |
|---|---|---|
| Ground | Deep, dark clay with high shrink-swell | Thin soil or fill over limestone |
| What piers have to do | Get below a deep moving layer | Reach rock under any fill |
| Common concern | Piers stopping shallow on friction | Fill that settles; uneven rock depth across one house |
| Ask | “How deep, and how is refusal confirmed?” | “Where is the rock, and which piers are on fill?” |
The geology guide explains why the ground changes so fast across town, and the cost page shows how pier type and count add up to a total.
Questions about the piers in your plan
- What type, how many, and where? Can I have a drawing?
- How deep do you expect them to go, and how is the stopping point decided?
- Will I get a log of depth and pressure or torque for each pier?
- Are any interior piers needed, and how will you reach them?
- Who designed the layout, and is an engineer reviewing it?
- Which piers does the warranty cover, and what voids it?