We provide clear, council‑compliant underpinning and foundation solutions so you can secure your home and get a fast, fixed quote. If your house shows cracking, sticking doors or gaps beside frames, we assess the issue and recommend an engineered plan.
We are Underpinning Sydney — structural preservation specialists with over 20 years’ experience. Our aim is to protect your building and restore long-term stability with minimal disruption.
We offer concrete underpinning, resin injection and screw piling, plus wall crack repairs, subfloor ventilation and retaining wall support. You receive an honest assessment, a fixed-price quote and certification for council records.
Send photos for a preliminary assessment or call 1300 970 930 to speak to Chris and book an on-site inspection. We coordinate engineering reports so you get compliant documentation and peace of mind.
Key Takeaways
- We stabilise the foundation to protect your house and stop progressive movement.
- Engineering-led services deliver council-compliant outcomes and certification.
- Choose from concrete underpinning, resin injection or screw piling based on conditions.
- Expect honest assessments, fixed quotes and minimal disruption during works.
- Send photos for a free preliminary assessment or call 1300 970 930 to book an inspection.
Why stabilising and pinning your foundations matters for safety and structural integrity
Stabilising ground beneath a house stops progressive subsidence and restores confidence. We explain the risks in clear terms and show practical steps you can take. Early assessment reduces the chance of larger repairs later.
Protecting your house structure from progressive subsidence and damage
Small signs often come first. Hairline cracks, doors that stick, small gaps around windows and uneven floors can mean the footings are moving.
Without timely action, minor faults become major issues. Larger cracks, misaligned frames and sloping floors harm the building and reduce property value.
Securing council-compliant outcomes and long-term peace of mind
A compliant repair combines engineering input, correct permits and certified work. We assess the ground and the existing foundation to choose a permanent solution.
| Indicator | What it may mean | How we respond |
|---|---|---|
| Hairline cracks | Early movement | Photo review and monitoring |
| Sticking doors/windows | Frame distortion | On-site levels check and report |
| Sloping or uneven floors | Advanced subsidence | Engineering-led repair with certification |
| Gaps at ceilings/walls | Ongoing movement | Detailed investigation and permanent stabilisation |
Pinning foundations Sydney
Our team matches the repair method to site conditions so your property gets durable, certified support. We design the approach around soil, access and engineering requirements. You receive clear scope, levels checks and compliance documentation.
Concrete underpinning for sinking or compromised footings
Concrete underpinning uses staged excavation to create new, deeper bearing. This transfers load to competent ground and suits significant settlement or damaged foundation footings.
We control movement during the work with a staged sequence. That protects the building and delivers measurable results with before-and-after levels.
Resin injection to consolidate reactive soils with minimal disruption
Resin injection strengthens soil through small holes and expanding resin. It reduces excavation and gets floors back in service quickly.
This method is effective in reactive clay and poorly compacted fill, improving ground capacity beneath slabs and walls with minimal downtime.
Screw piling solutions for poor access, deep support and extensions
Screw piles give deep, engineered support where access is tight or soils are weak. They suit extensions and where you need capacity fast.
We select the right method using engineering judgement, soil reports and the performance you need. All work is done by licensed specialists to certified standards.
| Method | When to use | Key benefit |
|---|---|---|
| Concrete underpinning | Major settlement, compromised footing | New bearing on competent ground; controlled staged work |
| Resin injection | Reactive clay, shallow voids | Minimal excavation; fast return to service |
| Screw piling | Poor access, deep support needs | Immediate load capacity; suited to extensions |
Learn more about our approach and what underpinning involves at what is underpinning. Expect clear explanations, documented scope and durable results that address the cause beneath the foundation.
Clear signs you may need underpinning or foundation repair
Recognising early signs of structural movement helps protect your house and avoid costly repairs. We name the common indicators so you know when to seek help and what to do next.
Cracks in brickwork, walls or slabs
Step cracking and diagonal cracks near openings are classic signs of movement. These cracks can show as small hairlines or wider separations.
Jammed doors and windows, misaligned frames
Doors that stick or windows that bind reveal frame distortion. Visible gaps at skirtings or between ceilings and walls point to differential movement.
Uneven floors, sunken slabs and retaining wall movement
Sloping or soft spots in floors often mean loss of support or subsidence. Retaining walls that lean or separate can affect your garden and the house.
Soil and drainage problems
Leaking pipes, blocked drains, tree roots and reactive clay soils cause moisture swings. These soil changes stress the ground beneath the house and accelerate movement.
- If you notice several signs together, you may need a professional assessment.
- Take photos and email them to us for a quick review.
- We give honest recommendations, explain if you need underpinning, and outline the safest repair without unnecessary upselling.
For more detail on repair options and what to expect, see our underpinning services.
Our engineering-led process for reliable results
Our engineering-led process starts with a quick, no-cost photo review so you know the likely cause and next steps. We give a plain-English assessment and honest advice before any on-site work.
Free no-obligation structural assessment and photo review
Send photos and we provide preliminary guidance within a short time. This gives you clarity without obligation.
On-site investigation, levels check and honest recommendations
On site we take levels, inspect walls and floors, and document defects for engineering review. Our team records evidence for a clear report.
Transparent fixed-price quote and scope of compliant works
You receive a fixed-price quote that defines scope, inclusions and any permits needed. The quote covers underpinning or concrete work where required.
Scheduling, execution and certification
We plan stages to reduce disruption and schedule works to suit you. Licensed specialists perform the job under engineering oversight.
- We manage permits and structural reports so approvals stay on track.
- Post-work levels confirm results and we supply certification and a handover pack.
- Clean-up and follow-up checks are included to confirm long-term stability.
With our years of experience, the process is clear and focused on lasting stability and measurable results.
Council-compliant methods, licensed & insured specialists
Before any excavation begins, we confirm permits, design and insurance are in place. That gives you immediate clarity and reduces surprises.
Builder licensing, OH&S commitment and insured workmanship
All underpinning work is done by a licensed builder carrying current insurances. We document cover for public and contractor liability so you and your neighbours are protected.
We meet OH&S obligations with site-specific controls and safe work methods. Controls minimise risk to people, services and the building fabric during the job.
| Requirement | What we provide | Benefit |
|---|---|---|
| Engineering & permits | Designs, inspections, council paperwork | Council-compliant certification for your property |
| Site safety | SWMS, traffic and excavation controls | Reduced risk to people and building |
| Work records | Photos, reports and handover pack | Clear evidence for future maintenance or sale |
- Our team explains approvals before work starts so you know the timeline.
- We select materials and methods for stability in local soil conditions.
- If neighbours or strata are involved, we coordinate documentation to avoid problems.
With years of experience, we stand behind every repair and provide the paperwork you need for peace of mind.
Transparent pricing and what affects the cost of underpinning in Sydney
A transparent quote begins with a proper assessment of site access, soil and existing damage. We give clear, fixed-price quotes so you know the likely cost before work starts.
Access, footing type, soil conditions and extent of damage
Typical costs can start from about $5,000 and rise with size, depth and complexity. Major damage or deep footings push the price higher.
Key cost drivers include footing type, soil reactivity, groundwater and access constraints. Leaking pipes and poor drainage often increase scope and time on site.
- Your quote reflects access, footing type and the foundation depth required for capacity.
- Soil reactivity and existing damage influence method, materials and duration of the job.
- Small-hole resin methods can reduce excavation and speed the work where ground allows.
- Concrete underpinning may be required for significant settlement or deep foundation repair.
- We explain each line so you see how the repair protects your property and building.
Book an assessment today for a photo review or on-site inspection. If you need underpinning, we offer options that balance durability, cost and disruption.
Why choose Underpinning Sydney
Choose a team that combines practical experience with honest advice to protect your house and investment. We bring over 20 years of work in foundation repair and deliver clear, certified outcomes.
20+ years’ experience, honest assessments and no unnecessary upsells
We give plain assessments and only recommend what is needed. Our team documents defects, levels and proposed work so you can decide with confidence.
Comprehensive services: wall crack repairs, subfloor ventilation, retaining wall support
Our services cover underpinning services, wall crack repair and subfloor ventilation. We coordinate engineering reports and council certification for smooth approvals.
Fast response across Sydney with minimal disruption and fixed quotes
Fixed quotes and reliable scheduling save you time and stress. We plan works to protect finishes, gardens and access while delivering measurable results.
- We protect homes with safety, stability and compliance.
- Our team manages permits and certification for your property.
- Send photos or call 1300 970 930 to speak to Chris today for a fast review.
| Benefit | What we do | Why it matters |
|---|---|---|
| Clear assessment | Photo review, on-site levels | Understand cause before work |
| Comprehensive services | Underpinning, crack repair, ventilation | Single point solution for homes |
| Fixed pricing | Detailed quote and scope | Budget certainty and less disruption |
For immediate guidance and peace mind, email photos or call 1300 970 930 and speak to Chris. We help you find the best path to stability and lasting protection for your house.
Conclusion
A quick assessment today can confirm whether simple repair or engineered underpinning is needed. Early action reduces the chance of further damage and higher costs.
We assess visible signs such as cracks, sticking doors and windows, and gaps. Our team explains soil and ground factors and recommends a clear foundation repair plan with engineering oversight.
If you need underpinning, we deliver licensed, council‑compliant work and certification so your structure is safe and stable. Minimal excavation options exist where the ground allows.
Book an inspection now. Call 1300 970 930 to speak to Chris, or email photos for a free assessment and fixed‑price quote. Learn more about our underpinning services and regain peace of mind for your home.