How much does foundation repair cost?

Most foundation repairs range from $4,000 to $16,000, depending on the extent of the damage and the size of your property.

How long does the repair take?

Most foundation repairs are completed in just 1-2 days using our GeoPoly™ resin injection method.

What is GeoPoly™ resin injection?

GeoPoly™ is a high-strength expanding resin that we inject beneath your foundation. As it expands, it fills voids, compacts loose soil, and lifts your foundation back to level.

Will you need to dig up my yard?

No! We drill small holes (about 16mm diameter) through your slab or beside your footings, inject the resin, and patch the holes. No excavation required.

What does the 20-year warranty cover?

Our 20-year structural warranty covers the repair work we perform. If any issues arise with the repaired area due to workmanship or materials, we'll fix it at no additional cost.

Is the assessment really free?

Yes, 100% free with no obligation. Our structural engineer will inspect your property, explain the issues, and provide recommendations.

How do I know if my floor piers are sinking?

Floors that bounce underfoot, slopes you can feel when you walk, doors that stick or drag, creaking that's getting worse — any of these are signs the piers beneath your floor have dropped and lost contact with the bearers above. Place a ball on the floor. If it rolls away, the piers have moved. A structural engineer can confirm it in a single visit. The assessment is free.

What causes floor piers to sink?

Reactive clay soil is the single biggest cause. It swells when wet, shrinks when dry, and pulls away from the base of the pier. Water erosion, tree roots, poor drainage, and age-related soil changes are also common triggers. In most cases, the pier itself is fine — the ground beneath it has failed.

How are sinking floor piers repaired without removing floorboards?

GeoPoly™ resin is injected through small, coin-sized holes drilled around the affected pier locations. The resin fills voids and soft spots beneath the pier footings, then lifts the piers back towards level. Laser equipment monitors the movement in real time. No floorboards removed. Most jobs done in 1–2 days.

Will my foundation be relevelled?

When conditions allow, yes. Every situation is different — soil type, void size, and the type of footing all play into it. Sometimes relevelling isn't recommended by the structural engineer — it's always about the best outcome for your home. The engineer assesses all of this during the free inspection, so you'll know exactly what's achievable before any work starts.

Is the 20-year warranty transferable if I sell?

The 20-year product and workmanship warranty is attached to the property, not the owner. If you sell, it transfers to the new buyer automatically. If the structural issue returns in the repaired area, Buildfix comes back and makes it right — at no additional cost.

Sinking Floor Piers

Sinking floor piers? They might be fine.

GeoPoly™ resin injection stabilises the soil beneath your piers and lifts your floors back towards level — no digging, no pier replacement. Backed by a 20-year warranty.

Free assessment · 1–2 day repair · 20-year warranty
Structural Engineers · Licensed Builders · Skilled Technicians

Trustpilot

Google

Sinking Floor Piers

Sinking floor piers? They might be fine.

GeoPoly™ resin injection stabilises the soil beneath your piers and lifts your floors back towards level — no digging, no pier replacement. Backed by a 20-year warranty.

Free quote · 1–2 day repair · 20-year warranty
Structural Engineers · Licensed Builders · Skilled Technicians

Sinking floor piers? They might be fine.

GeoPoly™ resin injection stabilises the soil beneath your piers and lifts your floors back towards level — no digging, no pier replacement. Backed by a 20-year warranty.

Free structural assessment with a fixed-price quote
Most jobs completed in just one day — no pier demolition
Backed by a 20-year warranty

Structural Engineers · Licensed Builders · Skilled Technicians

15,000+Homes Repaired

20-YearStructural Warranty

1–2 DaysMost Repairs

Trustpilot

Google

Pier foundation repair — fix the ground, not the pier.

Non-Invasive. Precision-Controlled. Guaranteed.

No Pier Replacement. No Digging. No Heavy Machinery.

Sloping floors, gaps along skirting boards, doors that won't sit square — these usually mean one or more piers have dropped. But the pier itself is often structurally sound. What's failed is the ground underneath it. The soil has compacted, dried out, or washed away — and the pier has simply settled with it. Replacing the pier treats the symptom. Stabilising the ground fixes the cause.

GeoPoly™ resin is injected through small access points beneath and around your sinking piers. The resin expands to fill voids, compact weakened soil, and gradually lift the pier — and the floor above it — back towards level. Real-time laser monitoring controls every millimetre of the lift. No excavation, no pier demolition, no heavy machinery beneath your home.

Most jobs are finished in a single day. Your floors are level, your piers are sitting on stable ground, and you've avoided the cost and disruption of full pier replacement. Guaranteed for 20 years.

Wondering if your piers need replacing — or just re-supporting? That's exactly what the free assessment answers.

Structural Engineers · Licensed Builders · Skilled Technicians

What to expect

Here’s how we repair your home’s sinking floor piers, from first visit to warranty.

Buildfix structural engineer assessing sinking floor piers with laser level equipment

Step 1

Free Structural Assessment

One of our structural engineers inspects the subfloor, measures pier levels, and assesses soil conditions beneath the affected piers. If the ground has moved rather than the piers failing structurally, GeoPoly™ injection is designed to stabilise and re-level them without replacement.

Buildfix quote package showing structural repair detail, quote cover page, and repair method statement

Step 2

Get Quote and Book

A complete quote package arrives with detailed drawings, method statements, and a fixed-price quote. Book through our online portal when you're ready.

Buildfix technicians injecting GeoPoly™ resin beneath sinking brick piers

Step 3

GeoPoly™ Injection

Small injection points are drilled beside or beneath the sinking piers. GeoPoly™ resin is injected at depth, filling voids and compacting weakened soil beneath each pier.

Laser monitoring equipment measuring pier and floor re-levelling in real time

Step 4

Lift, Level, and Verify

Laser monitoring tracks every millimetre as the piers — and the floors above them — are gradually lifted back towards level. Your engineer confirms the results before the team leaves.

Step 5

Receive Your Warranty

The Completion Package arrives a few days after sign-off — a full report with images, invoice, and your 20-year warranty documentation.

See GeoPoly™ pier repair on real homes.

Actual GeoPoly™ projects where sinking piers are permanently stabilised.

Press the image for a closer look.Click on the image for a closer look.

Sinking brick pier re-levelled with GeoPoly before and after

Skirting board gap closed after floor re-levelling before and after

Concrete pier stabilised beneath subfloor before and after

Sinking floor lifted back to level at skirting board before and after

Floor gap at wall closed after pier repair before and after

Subfloor pier and bearer re-supported before and after

Sinking pier causing uneven floor repaired before and after

Floor pier settlement corrected before and after

Pier gap closed with GeoPoly resin injection before and after

Sinking floor pier stabilisation before and after

Instant results.
Guaranteed to last.

The benefits of a GeoPoly™ pier repair.

GeoPoly™ resin is injected beneath your existing brick or concrete piers to fill voids and compact the soil underneath. The piers are re-supported from below — no replacement, no new footings, no digging.

Close-up of pier with GeoPoly resin expanding beneath to stabilise foundations

Ready to stabilise your floor piers?

Piers measured, cause identified, fixed-price quote. It's free.

Structural Engineers · Licensed Builders · Skilled Technicians

Real homes. Real results

See how we’ve helped homeowners fix their sinking floor piers.

Why choose Buildfix?

Buildfix brings structural engineers, licensed builders, skilled technicians, and the manufacturer together under one roof. For nearly 15 years, Buildfix has been delivering non-invasive structural repairs — saving homeowners the hassle and costs of traditional methods. What used to take weeks now takes just 1 to 2 days.

Why homeowners choose Buildfix:

Non-invasive technology. No pier replacement. No subfloor demolition. No heavy machinery. You can stay home while the work happens.

Guaranteed. Your repair is backed by a 20-year warranty. If the floor sinks again, we come back at no cost to you.

One team, diagnosis to repair. Buildfix engineers assess your home and oversee the repair. Buildfix technicians carry it out.

Save thousands — best pricing. All quotes fixed-price. No hidden charges. No surprise costs. If your job goes over, it's on us.

Structural Engineers · Licensed Builders · Skilled Technicians

Watch Video

Learn more about Buildfix and how we fix sinking floor piers without replacement.

Structural Engineers · Licensed Builders · Skilled Technicians

“All of the Buildfix team have been easy to communicate with. Everyone was punctual and communicated arrival times well ahead of arrival.”

Scott HolmesMelbourne, VIC

Questions?

Our team is here to answer any questions you may have Monday – Friday 8am to 5pm AEST. Give us a call on 1300 854 115.

Not necessarily. Full pier replacement removes and rebuilds the piers — but if the piers are structurally sound and the ground has moved, you're replacing something that doesn't need replacing. New piers on the same failed ground will move the same way. GeoPoly™ resin injection fixes the ground beneath the piers, lifting them back into contact with the bearers above. It's faster, less disruptive, and a fraction of the cost.

Sinking floor piers? They might be fine.

Pier foundation repair — fix the ground, not the pier.