We provide permanent, engineered fixes and free no‑obligation structural assessments. Call 1300 970 930 to speak with Chris or email photos for a swift preliminary assessment.

Our team stabilises ground and re‑levels concrete slabs using resin injection. This method lifts sunken concrete, fills voids and improves ground bearing with minimal disruption.

We assess structural risk, set a certified scope and coordinate engineering where needed. You get honest advice, a transparent fixed‑price quote and no unnecessary upsells.

Most sites are trafficable the same day. We prioritise safety, compliance and clean, certified outcomes to protect your home and visitors.

Key Takeaways

• Free structural assessment and clear, fixed‑price quotes.
• Engineered resin injection lifts slabs and fills voids fast.
• We coordinate engineering reports for certification.
• Licensed, insured team with minimal site disruption.
• Call 1300 970 930 to speak with Chris or email photos for quick guidance.

Trusted structural preservation for sunken and sinking driveways in Sydney

Precision ground improvement lifts sunken slabs and limits disturbance to gardens and services. We speak plainly, act with care and provide engineering‑led guidance.

Our licensed team uses resin injection to re‑level concrete with small drill holes and a fast cure. This method fills voids under a concrete slab and restores bearing capacity. Most sites are trafficable the same day.

We protect your home, vehicles and visitors by removing trip hazards and stabilising foundation edges. We confirm the scope in writing and coordinate engineers where certification is needed.

• Engineered services across all Sydney areas, from Inner West to Northern Beaches.
• Our team is licensed, insured and backed by 20+ years’ experience.
• Non‑invasive approach keeps landscaping and utilities intact.

Call 1300 970 930 to speak with Chris for a no‑obligation assessment. Prefer email? Send photos for a quick steer before a site visit.

Why safety and compliance come first with driveway repairs

We put safety, structural integrity and council compliance ahead of speed. Before any work starts we assess trip hazards, load paths and the underlying soil that drives subsidence.

Trip hazards, vehicle loads and water risks managed

Uneven concrete slabs create lips that cause trips and stress when vehicles pass. We identify these hazards and remove or level them to restore safe access.

We also check vehicle load paths and reinstate bearing capacity so the foundation carries weight safely. Managing water ingress is key to stopping subgrade erosion.

Council‑compliant methods, licensed team and certified outcomes

We use proven methods such as resin injection and underpinning when needed. This reduces disruption and often lets you use the slab the same day.

• We follow council rules and document the chosen method.
• Our licensed team works under strict safety procedures.
• We advise engineer sign‑off where certification is prudent.
• Compliance protects you for sales, insurance and strata matters.

Signs your concrete driveway needs attention now

We guide anxious homeowners to act early to prevent further damage. Small surface changes often mean the soil under a slab is moving. Early action reduces cost and disruption.

Cracks, lips between slabs and pooling water after rain

Look for cracks that widen or step across joints. Check for lips between slabs that catch feet or tyres.

Watch for new pooling after rain that wasn’t there before. These are clear signs of subsidence and progressive damage.

Sunken concrete, tilted slabs, clunking under wheels and visible voids

Notice clunking under wheels or a “pumping” feeling when driven over. Inspect edges for visible voids beneath the concrete slab.

• Monitor doors or gates rubbing if the approach has shifted.
• Early intervention limits further cracking and restores drainage falls.
• Send photos for a quick opinion on urgency and next steps.
• Call 1300 970 930 to book a site assessment or request a free assessment.

What causes sinking concrete driveways in Sydney conditions

A mix of clay action, poor compaction and water damage explains many slab failures.

Reactive clay soils shrink in drought and swell after heavy rain. That cycle causes subsidence and uneven bearing under concrete slabs.

Reactive clay soils, drought shrink-swell and storm erosion

Drought and storms change moisture quickly. This movement undermines ground support and opens voids beneath a slab.

Poor base compaction, downpipe leaks and heavy vehicle traffic

Poorly compacted bases settle under load. Leaking downpipes wash away subgrade ground. Heavy vehicles compress weak layers and speed collapse.

Tree roots, historical fill and subgrade washouts

Tree roots displace soil. Old fill can be soft or uneven. Combined with washouts, these cause local failure and visible slab movement.

• We test soil and ground response before choosing a method.
• Resin injection can densify soils and fill hidden voids. Learn more about our resin injection approach here.
• We fix causes, not just symptoms, to reduce recurrence and restore long‑term stability.

Sinking driveway repair Sydney

You get an engineering‑led pathway that secures your slab and avoids needless demolition. We present a calm, step‑by‑step plan so you know what to expect.

We protect your property with non‑invasive lifting and ground improvement. Most works are trafficable the same day, avoiding full removal of the concrete slab.

Our services combine resin injection, underpinning or screw piles depending on site tests. We choose the least disruptive option that delivers a permanent solution.

• We specialise in sinking repair across the region with 20+ years’ experience.
• Fixed‑price quotes with clear inclusions and a certified scope.
• Our team protects utilities, landscaping and keeps the site tidy.
• We stabilise your property and restore safe access quickly.
• We coordinate engineers for certification where required.

Call 1300 970 930 to speak with Chris and discuss a prompt, honest plan for your home.

Permanent resin injection to lift and re‑level concrete slabs

We use engineered resins and measured lift to deliver a certified, lasting result with minimal disruption. Our controlled method fills voids beneath a concrete slab and restores bearing capacity quickly.

Void filling and ground improvement under your driveway

The process uses small drilled holes to access hidden gaps. We inject expanding resin that fills voids and compacts weak soil.

This improves ground strength under wheel paths and reduces future movement.

Precision lifting with minimal disruption

We monitor lift in millimetre steps to achieve the correct level. Controlled injection allows precise re‑levelling without removing concrete.

We protect landscaping and services while completing the job.

Fast curing so you can use the slab shortly after

Engineered resin cures in minutes, not hours. That means a much shorter downtime and a rapid return to use.

• We drill small, strategic holes to reach voids below the slab.
• Resin expands to fill gaps and densify the subgrade.
• We confirm levels at each stage and document the process.
• This solution avoids demolition, reduces waste and gives a certified outcome.

Outcome: a durable, compliant solution that restores level and function in a short time.

When underpinning or screw piling is the right method

Some edges and foundations need more than surface fixes to restore long‑term stability. We recommend deeper support when footings or adjoining structures have lost bearing to depth.

Stabilising edges, footings and adjoining structures

We assess if footings or edges have lost contact with competent ground. Where loads transfer to weak soil, we propose underpinning or screw piles.

Choosing between resin injection, concrete underpinning and piles

Underpinning transfers load to deeper, stable strata. Traditional concrete underpinning suits heavy loads and limited movement zones.

Screw piling (helical piles) works well in reactive soils and tight access. It gives deep, immediate support with minimal excavation.

Resin injection is ideal for voids and shallow bearing improvement. It lifts a concrete slab and densifies the near surface soil.

• We consider soil data, loads and nearby structures.
• We coordinate engineering design and certification.
• We stage works to keep access open where possible.
• We provide a fixed scope so you know the outcome.

Wall crack repairs, retaining wall support and subfloor ventilation

Cracks in walls or shifting rails often signal deeper ground movement that affects adjacent concrete slabs.

We address these related issues so your slab and nearby structures remain stable. Early attention stops small faults from becoming bigger problems.

Addressing related structural issues that affect driveway performance

Wall cracks can point to broader settlement near the approach. Retaining walls may need added support to control soil pressure.

Subfloor ventilation cuts moisture cycles in reactive clays. That reduces shrink‑swell and limits future movement under floors.

• We stabilise adjoining floors if they show movement.
• We repair cracks and tie slabs where joints have opened.
• Targeted resin improves bearing under adjacent panels.
• We prevent water paths that wash out subgrades.
• A whole‑property view delivers lasting performance and one point of contact for all related services.

One coordinated plan means you get clear outcomes for your property and peace of mind that the underlying causes are treated, not just the symptoms.

Our engineering‑led assessment and repair process

Our process combines visible inspection with targeted ground testing before any intervention. We provide calm, stepwise guidance from first photos to certified completion.

Photo review, site inspection and ground condition testing

Start with a quick photo review so we can prioritise urgency. Then we attend the site for a measured inspection.

Small test holes and probes show the ground response. That data informs the chosen method and helps prevent further subsidence.

Structural engineering report coordination and certified scope

We coordinate an engineer when a report is needed. You receive a certified scope before any works begin.

Method selection: resin injection, underpinning or screw piling

We select resin injection, underpinning or screw piles based on soil, access and load paths. Each option targets the root cause, not just the symptom.

Quality control, monitoring and post‑lift verification

Our team monitors lift and records measurements during injection. We verify levels and bearing improvement after the lift.

• Quick photo review for initial guidance.
• Detailed site inspection and ground testing.
• Certified scope and engineer coordination.
• Method chosen from data and access limits.
• Monitored lift, verified levels and final documentation.

Clear updates at every stage keep you informed and support council compliance or future sale.

Costs, quotes and value: what influences driveway repair pricing

Pricing depends on slab area, access and how deep the ground issues run. We assess each site so the quote matches the actual work needed.

Key cost drivers include slab dimensions, ease of access for equipment, soil condition and any drainage defects that worsen subsidence.

Slab size, access, soil conditions and extent of subsidence

Large slabs and a high lift requirement increase material and time on a job.

Limited access can add setup time or require alternate equipment. Poor soils or ongoing water issues broaden the scope.

We inspect cracks and adjoining floors to decide if they should be included in the same solution.

Transparent fixed‑price quotes and no unnecessary upsells

We provide fixed‑price quotes with clear inclusions and documented allowances. You see what the process will involve and the expected program.

• Pricing reflects slab size and required lift.
• Soil and drainage issues influence scope and injection volumes.
• Many jobs cost less than full replacement and return faster to use.
• We aim to stabilise the ground long term and avoid surprise invoices.

We focus on value and safety. Our approach keeps costs predictable and targets the cause, not just a quick fix.

Speed, disruption and how we protect your property

We plan each job to limit time on site and keep disruption to a minimum. Our priority is to restore safe, level surfaces while protecting landscaping, utilities and finishes.

Non‑invasive methods and tidy sites

We use non‑invasive techniques that leave gardens intact. Small drill holes are used to inject resin beneath the slab.

Holes are neat and patched on completion. We isolate work zones and protect edges, drains and services to keep your property safe.

Typical time on site and trafficable times

Most jobs take hours, not days. Resin cures in minutes so areas can reopen shortly after cleaning.

We aim for a fast, clean outcome so you get the job done safely and efficiently.

• Non‑invasive techniques keep your property functional.
• Small drill holes are neatly patched on completion.
• Typical time on site is hours, not days.
• Most areas are trafficable the same day.
• Injection is controlled to avoid over‑lift and stress.
• We manage dust and noise to low levels and respect your garden.
• We walk you through results before sign‑off.

Why homeowners choose Underpinning Sydney

Decades of hands-on experience ensure we diagnose issues and deliver clear, certified outcomes. We give honest assessments and explain options plainly. Our focus is on lasting protection for your home.

20+ years’ experience, honest assessments, proven results

We use proven resin methods to lift and stabilise concrete with minimal disruption. The approach avoids full replacement in most cases and finishes quickly.

Engineer involvement provides confidence. We document the scope and provide council‑ready paperwork so you get certified outcomes.

Local team, Australian‑tested resins and council‑ready documentation

• 20+ years preserving homes and assets with reliable methods.
• Honest assessments with no unnecessary upsells from our local team.
• Australian‑tested resins that lift a concrete slab and improve ground bearing.
• Council‑ready documentation and coordinated engineering for each job.
• We work across all areas promptly and manage every job with experienced supervisors.
• You gain peace of mind with certified outcomes and a solution focused on safety, compliance and value.

Service areas across Sydney

From clay‑rich hills to sandy coastal strips, we tailor ground improvement to local conditions. We cover Greater Sydney and bring methods matched to each area.

Local knowledge matters. Reactive clays on the North Shore behave very differently to coastal sands. We choose the right technique and drainage control for your property and concrete slab.

• We service the Inner West, Eastern Suburbs and City.
• North Shore and Northern Beaches reactive clays are familiar to us.
• We work across the Hills, Parramatta and Western Sydney.
• Sutherland Shire and St George coastal areas are covered.
• We tailor methods to local soil conditions and access.
• We schedule promptly and respect neighbouring properties.
• Driveway work is coordinated to minimise traffic disruption.
• We communicate with strata and neighbours when needed.

Call 1300 970 930 to confirm your area and availability, or send photos for fast feedback before a site visit. See our service area coverage for more details.

Before and after outcomes: level, durable and compliant driveways

We restore even levels and functional falls so water moves away from your slab. That removes lips and restores safe, compliant surfaces for family and visitors.

Eliminating trip hazards and restoring kerb appeal

Before: visible lips, uneven concrete and panels that catch feet or tyres.

After: aligned slabs, patched holes and a neat finish that improves kerb appeal and property value.

Reducing ongoing maintenance and preventing further damage

Resin lifting fills voids beneath the slab and stabilises the foundation layer to reduce future subsidence.

Compared to leaving voids unfilled, this approach prevents repeat movement and lowers long‑term maintenance.

• You see a clear before and after in levels and alignment.
• Trip hazards are removed for family and visitors.
• Falls are restored to shed water and prevent pooling.
• Stabilised foundation layers reduce future movement.
• Kerb appeal and property value are improved.
• Most works return to service in very little time.
• We document levels and outcomes for your records.
• Sunken concrete panels are re‑supported and stitched if needed.
• You gain lasting safety and peace of mind.
• Our work is designed for compliance and durability.

Get started: free assessment options that suit you

A short photo assessment often clarifies urgency and the likely solution. We offer free, no‑obligation assessments and fixed quotes so you can plan with confidence.

Call 1300 970 930, speak to Chris and book a site inspection

Call 1300 970 930 to speak with Chris now and book a convenient site inspection. A site visit includes test points and a clear plan for access and timings.

Email photos for a preliminary assessment and swift guidance

Email photos for a rapid preliminary assessment. We review images, advise on urgency for sunken concrete and say if a site inspection is needed.

• We outline options, timing and access requirements.
• You receive a fixed‑price quote with clear inclusions.
• Our team confirms the work sequence to keep access open.
• We advise any prep needed before the crew arrives.
• Most jobs finish efficiently and you get the job done with minimal disruption.
• We confirm results onsite before sign‑off so you leave satisfied.

Start today for a safer driveway sooner. Call Chris or email photos and we’ll help get the job done with minimal fuss.

Conclusion

Secure long‑term stability with an engineering‑led solution that protects your property. We target the ground beneath each slab to reduce subsidence and restore safe, level concrete quickly.

We repair the cause of movement, not just the surface. Where deeper support is needed we use underpinning or piles. Where shallow voids exist we apply measured resin injection and controlled lift.

Our experience covers floors, walls and adjoining structures so the whole site is supported. You receive clear, certified documentation for council and resale.

Call 1300 970 930 to speak with Chris or email photos for a fast preliminary view. We are ready to help you restore a safe, compliant driveway today.