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Leveling means raising a settled foundation toward level. Piering means installing deep supports, called piers, to hold that foundation. This page explains how piers work, when lifting helps and what a good pier quote contains.
What the job is
A foundation settles when soil under it drops, shrinks or compresses. The house above drops with it, but rarely evenly. One corner may drop two inches while another corner drops none. That uneven drop is called differential settlement. It causes cracks, slopes and sticking doors.
Piering transfers house load from surface soil to deeper soil or rock. Piers are installed under footings, slab edges or interior slab points. Once piers reach stable material, the crew can lift the foundation in small steps. The piers then hold the lifted position.
Leveling without piers, such as shimming a pier and beam floor, is a different job. See Pier and beam foundation repair for that case. This page covers deep pier leveling for slabs and footings.
Signs you need it
Sloping floors are a key sign. A floor that slopes toward one corner, with a level reading that confirms the slope, points to settlement. Cracks that widen over time also point to ongoing settlement.
Doors and windows that stick on the low side of a house are common. Gaps at the top of a door frame, on the low side, can show a frame that has tilted. Brick cracks that step up toward a low corner can show the same pattern.
A provider should map floor levels before recommending piers. A single low reading does not prove a need for a full perimeter pier job. A map shows whether settlement is local, linear or widespread.
Process step by step
First, the provider measures floor elevations and maps cracks. It checks soil, drainage and plumbing signs outside. It may recommend a soil report for a large job.
Second, the provider designs a pier plan with locations, type, spacing, target depth and a lift goal.
Third, the crew excavates at pier points, or drills through a slab for interior piers. It installs piers one by one. For push piers, it drives sections down until resistance shows stable material. For helical piers, it screws the pier down to a target torque or depth.
Fourth, the crew lifts the foundation slowly. It monitors cracks, doors and floor levels during the lift. It stops lifting if a wall shows new stress or if plumbing shows strain. A partial lift is sometimes safer than a full lift to original level.
Fifth, the crew locks piers in place, backfills and rechecks floor levels.
Pier types in plain words
Steel push piers use steel sections driven by hydraulic pressure. House weight provides resistance. They can reach deep stable layers. They need enough load at each pier point to drive them. A light porch or garage corner may not provide enough load for a push pier alone.
Helical piers use a steel shaft with helical plates. A machine rotates the pier into the ground. Torque readings help judge soil resistance. Helical piers can work in lighter load areas and in tight access. They can also work where a push pier would need more load than the structure provides.
Concrete piers include drilled shafts and pressed concrete cylinders. Drilled piers are formed in a drilled hole with concrete and steel. Pressed piers are segments pushed into the ground. Concrete piers need curing time or segment stacking time, depending on type.
Ask which pier type is proposed for each location, and why. A single house may use more than one pier type if loads and access differ around the perimeter.
Materials and options
Steel quality, pier diameter and bracket type affect pier strength. A bracket connects the pier to the footing or slab. It must transfer load without crushing the footing edge. Ask what bracket type is planned and how it is attached.
Grout and concrete strength matter for drilled piers. Ask for the mix or strength class if a drilled pier is proposed. For helical piers, ask for shaft size, plate size and target torque. Those details let you compare quotes on equal terms.
Cost factors
Pier count is the main driver. More piers mean more material, more excavation and more labor. Pier depth is second. Deeper piers need more sections, more torque work or more drilling.
Access affects cost. Interior piers need slab cutting and finish repair. Exterior piers need excavation and landscape restoration. A tight side yard or a driveway over a pier point adds labor.
Finish repair is often separate from a pier quote. Ask for a written split.
We do not publish a single price range here. Pier count, depth and access vary too much from house to house. An on site quote with a pier map is the useful price for your home.
How to choose a provider
Ask for a pier map with locations, type, spacing and target depth, plus a lift goal in writing.
Ask about permits and inspections in your city, and for a final record with pier depths and lift amounts.
Check licensing that applies to your job. Ask for proof and check it when you can. For a large job, compare two pier maps. A quote with fewer piers is not cheaper if it leaves a settled area unsupported.
How our referral works
We do not design a pier plan or set a price. The provider should give a written pier map, scope and price before work starts.
Cities in this batch
See the home page for the full city list in this batch.
Frequently asked questions
What does leveling a foundation actually do?
Leveling raises a settled part of a foundation toward its original height. Piers support the foundation while it is lifted. The goal is a floor that is closer to level, doors that close and cracks that stop growing. Leveling does not always return a house to perfect level. A provider should state the lift goal in writing before work starts.
How deep do foundation piers need to go?
Piers should reach soil or rock that moves less than surface soil. Depth depends on soil type, active clay depth and load. A shallow pier in active clay may still move with seasons. Ask the provider how depth was chosen for your lot, and what happens if a pier does not reach stable soil at the first planned depth.
What is the difference between push and helical piers?
Push piers are driven down using house weight as resistance. Helical piers are screwed into the ground with a rotating shaft and plates. Push piers suit heavy loads and deep stable layers. Helical piers suit lighter loads, tight access and soils where driving is hard. A provider should match pier type to load, soil and access.
Can leveling crack walls or tile?
Yes, lifting can crack walls, tile and finishes, especially if a house has settled for a long time. A slow, monitored lift reduces that risk but does not remove it. Ask the provider to warn you about likely cosmetic damage before work starts, and to state what finish repair is included in the quote and what is not.
How many piers does a house need?
Pier count depends on settled area, load, soil and pier spacing. A corner lift may need only a few piers. A full perimeter job may need many piers. Ask for a pier map with locations and spacing. Compare pier count across quotes only when pier type, depth and spacing are the same, or the comparison will mislead you.
Common questions
What does leveling a foundation actually do?
Leveling raises a settled part of a foundation toward its original height. Piers support the foundation while it is lifted. The goal is a floor that is closer to level, doors that close and cracks that stop growing. Leveling does not always return a house to perfect level. A provider should state the lift goal in writing before work starts.
How deep do foundation piers need to go?
Piers should reach soil or rock that moves less than surface soil. Depth depends on soil type, active clay depth and load. A shallow pier in active clay may still move with seasons. Ask the provider how depth was chosen for your lot, and what happens if a pier does not reach stable soil at the first planned depth.
What is the difference between push and helical piers?
Push piers are driven down using house weight as resistance. Helical piers are screwed into the ground with a rotating shaft and plates. Push piers suit heavy loads and deep stable layers. Helical piers suit lighter loads, tight access and soils where driving is hard. A provider should match pier type to load, soil and access.
Can leveling crack walls or tile?
Yes, lifting can crack walls, tile and finishes, especially if a house has settled for a long time. A slow, monitored lift reduces that risk but does not remove it. Ask the provider to warn you about likely cosmetic damage before work starts, and to state what finish repair is included in the quote and what is not.
How many piers does a house need?
Pier count depends on settled area, load, soil and pier spacing. A corner lift may need only a few piers. A full perimeter job may need many piers. Ask for a pier map with locations and spacing. Compare pier count across quotes only when pier type, depth and spacing are the same, or the comparison will mislead you.