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Slab Foundation Repair

Fix cracked, sinking, and uneven concrete slabs with licensed slab foundation repair experts (Lic. #1092628) serving Southern California.

Licensed (Lic. #1092628), bonded, and fully insured crews you can trust around your home.

Slab jacking, foam, and pier systems that lift and stabilize concrete slabs.

Engineered slab repairs backed by a workmanship warranty.

Expert Slab Foundation Repair

Slab-on-grade foundations do not sag the way raised ones do — they crack, tilt, and separate. Around Los Angeles the usual causes are expansive clay soils that swell and shrink with the seasons, water pooling against the perimeter, plumbing leaks beneath the slab, and fill that was never properly compacted. You see it as cracks running across the floor, doors that stop latching, and gaps opening where the walls meet the ceiling. Hollywood Contractor Corp is a licensed general contractor (CSLB #1092628) repairing slab foundations across LA County. We work out what is actually moving the slab — soil, water, or a leak — then stabilize and lift it, rather than patching cracks and hoping. See all our foundation repair services.

Visible fracture line across a concrete slab floor in a home

Signs Your Slab Foundation Needs Repair

Slab problems show up throughout the house, not just in the concrete. If you see several of these, it’s worth a professional look.

  • Cracks in the slab or floor tile
  • Uneven, sloping, or sinking floors
  • Doors and windows that stick or won’t latch
  • Cracks in drywall, especially at corners
  • Gaps between walls, floors, and the ceiling
  • Warm or damp spots that hint at a slab leak

What Causes Slab Foundation Problems in LA

Slab damage almost always starts in the soil. We identify the cause so the repair actually holds.

  • Expansive clay soil that swells and shrinks
  • Poorly compacted fill beneath the slab
  • Plumbing and slab leaks washing out soil
  • Poor drainage and moisture around the home
  • Drought cycles drying and shrinking the soil
  • Tree roots drawing moisture from under the slab
Eroded soil and void beneath a concrete slab foundation
Polyurethane foam injection lifting a concrete slab

How We Repair Slab Foundations

We match the repair to the slab and the soil beneath it — lifting, stabilizing, and sealing so the floor is solid and level again.

  • Slab jacking — pump slurry under the slab to raise it
  • Polyurethane foam — precise, lightweight slab lifting
  • Slab piers — deep support for heavily settled slabs
  • Crack repair — seal and bond cracks in the concrete
  • Leak coordination — fix plumbing leaks under the slab
  • Drainage correction — stop the water that caused it

Slab Foundation Repair Methods Explained

The right method depends on how far the slab has moved and why. Here are the proven slab repairs we use in local homes.

  • Slab jacking (mudjacking) — pumps a cement slurry beneath a sunken slab to lift it back to level.
  • Polyurethane foam injection — injects expanding foam that lifts slabs precisely with minimal mess.
  • Slab piers — steel piers driven to stable soil to support and lift heavily settled slabs.
  • Epoxy crack injection — structurally bonds and seals cracks in the slab.
  • Plumbing leak coordination — locate and repair under-slab leaks that wash out soil.
  • Drainage correction — fix the water and soil problems that caused the movement.

Our Slab Foundation Repair Process

A clear, predictable process means no surprises — just a slab that’s diagnosed, lifted, and sealed the right way.

1

Inspection & Leak Check

We measure the slab, map the movement, and check for leaks and soil issues.

2

Repair Plan & Quote

You get a clear explanation of the cause and a written, fixed-price plan.

3

Lift & Seal

We raise the slab back to level, stabilize the soil, and seal the cracks.

4

Final Check & Warranty

We re-measure, confirm it’s level, clean up, and back the work with a warranty.

Why Homeowners Choose Hollywood Contractor Corp

When your slab is cracking or sinking, you want a contractor who finds the real cause, explains the fix in plain language, and makes it last. Here’s what sets our slab repairs apart.

  • Licensed, bonded & insured (Lic. #1092628)
  • Free, no-pressure on-site inspections
  • Transparent, fixed-price quotes
  • Root-cause repairs, not surface patches
  • Slab jacking, foam & steel pier systems
  • Local crews who know LA soil and codes
  • Hundreds of completed LA-area projects
  • Workmanship warranty on every job

How Much Does Slab Foundation Repair Cost?

Slab repair in Los Angeles typically runs from about $3,000 for localised work to $30,000+ for a full perimeter lift. Price follows how far the slab has moved and what is driving it.

Scope of work Typical LA range What it covers
Crack sealing & monitoring $800 – $2,500 Epoxy or polyurethane injection on non-structural cracks, plus elevation monitoring.
Polyurethane foam lifting $3,000 – $9,000 Injected foam raises a settled section. Fast, minimal disruption, no excavation.
Push or helical piers $8,000 – $25,000 Steel piers driven to load-bearing soil, then the slab is lifted and locked off.
Full perimeter underpinning $20,000 – $45,000+ Piering around the whole footprint where settlement is widespread.
Plumbing leak repair $2,000 – $8,000 Locating and fixing an under-slab leak — often the actual cause of the movement.

The single biggest cost driver is why the slab moved. Settlement from poorly compacted fill needs piers; heave from expansive clay needs moisture control; a slab dropping over a leaking supply line needs the plumbing fixed first. Lifting a slab without addressing an active leak simply buys a year.

Is It Settlement or Heave?

These look similar and are treated very differently. Getting it wrong is the most common and most expensive mistake in slab repair.

Settlement (slab sinking)

  • Cracks wider at the top than the bottom
  • Floors slope away from the centre of the house
  • Gaps opening above doors and windows
  • Worse during long dry spells
  • Often near the perimeter or an added section

Heave (slab lifting)

  • Cracks wider at the bottom than the top
  • Floors bulge upward, often mid-slab
  • Doors bind at the top of the frame
  • Worse after heavy winter rain
  • Common over expansive clay soils

Heave is usually a water problem — see drainage solutions.

Slab Repair Methods Compared

The right method depends on the cause, the depth of competent soil, and how much of the slab has moved.

Option Best for Expected life Relative cost
Foam injection Modest settlement, quick turnaround 10–20 years $
Push piers Heavy structures over deep unstable soil 40+ years $$$
Helical piers Lighter loads, tight access 40+ years $$
Crack injection Non-structural cracks only 15+ years $
Moisture management Expansive clay and heave Ongoing $

Piering is permanent but invasive; foam is faster and cheaper but suits a narrower set of conditions. Any contractor offering only one of these will recommend it regardless of what your slab is doing.

What to Expect During the Project

Most slab repairs take two to six days. Foam lifting is often finished in a single day; piering takes longer because of the excavation.

Stage Typical timing What happens
Inspection & elevation survey Day 0 Floor elevations measured across the slab, cracks mapped, plumbing checked if a leak is suspected.
Access & excavation Day 1 Interior flooring lifted where needed, or perimeter pier locations excavated.
Lift & stabilise Days 1–4 Piers driven or foam injected, then the slab raised in slow, monitored stages.
Backfill & patch Day 4–5 Excavations filled, concrete patched, injection points finished.
Final survey Final day Elevations re-measured and the workmanship warranty issued.

Expect some cosmetic cracking above as the slab returns toward level — that is normal and we point out beforehand where it is most likely.

How to Choose a Contractor

Slab foundation work is largely invisible once it is finished, which is exactly why standards vary so widely. A few things reliably separate a proper job from an expensive patch.

Good signs

  • An active CSLB licence you can verify online
  • A written, itemised, fixed-price scope
  • They explain the cause, not just the fix
  • Realistic timelines rather than optimistic ones
  • A workmanship warranty in writing
  • They check for under-slab plumbing leaks first
  • They measure floor elevations, not just eyeball cracks

Warning signs

  • A quote given without a proper site visit
  • Pressure to sign today for a discount
  • Large cash deposits up front
  • The same solution proposed for every home
  • Vague allowances instead of fixed pricing
  • Piering recommended before any cause is identified

Hollywood Contractor Corp holds CSLB licence #1092628 — verify it, and any contractor you are considering, with the California State License Board.


Slab Foundation Repair FAQs

How much does slab foundation repair cost?

It depends on the method and how far the slab has settled. Minor slab jacking or foam leveling often runs about $1,500 to $6,000, while slab pier installation on a significantly settled foundation can range from roughly $10,000 to $25,000 or more. We provide a free on-site inspection and a clear, written, fixed-price quote before any work begins.

What are the signs of slab foundation problems?

Common signs include cracks in the slab or floor tile, uneven or sloping floors, doors and windows that stick, drywall cracks at corners, and gaps between walls and floors. Warm or damp spots on the floor can also indicate a slab leak that’s undermining the foundation.

What is the difference between slab and pier-and-beam repair?

A slab foundation is a single concrete pad poured on the ground, while a pier-and-beam foundation is raised on supports over a crawl space. Slabs are repaired with slab jacking, foam, or slab piers; pier-and-beam homes are repaired by replacing piers and beams and re-leveling. We work on both.

How long does slab foundation repair last?

When the soil and drainage causes are addressed, slab repairs are long-lasting. Foam and slab jacking are very durable, and slab piers provide permanent support because they reach stable, load-bearing soil. We back our work with a workmanship warranty.

Is polyurethane foam or mudjacking better for lifting a slab?

Both work well. Mudjacking (slab jacking) pumps a cement slurry and is economical for larger areas, while polyurethane foam is lighter, cures fast, and allows very precise lifting with smaller holes. We’ll recommend the best option for your slab after inspecting it.

Can a plumbing leak cause slab foundation damage?

Yes. A leak under the slab can wash out the soil that supports it, leading to sinking and cracks. That’s why our inspection includes checking for slab leaks — we coordinate the leak repair and then lift and stabilize the slab.

How long does slab foundation repair take?

Most slab jacking and foam repairs are completed in a single day. Slab pier installation on a heavily settled foundation can take a few days. We’ll give you an exact timeline with your quote.

Is slab foundation damage covered by insurance?

Usually not. Most policies exclude damage from gradual settling, soil movement, and poor drainage, though sudden damage from a covered event such as a burst pipe may be covered. We’ll document the cause to help with any claim, but always confirm with your insurer.

What Our Customers Say

Don’t just take our word for it — here’s what homeowners say about working with Hollywood Contractor Corp.

Cracked or Sinking Concrete Slab?

Schedule a free, no-pressure inspection. We’ll find the cause, explain your options in plain language, and give you a clear plan to get your slab solid and level again.

Call (818) 264-1955


Slab Foundation Repair Across Los Angeles County

Local crews, local permit knowledge. These communities have a dedicated page covering the work we do there.

We serve 34 cities across the greater Los Angeles area. View all service areas →

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