We fix urgent foundation issues for homeowners and property managers across Sydney. Call 1300 970 930 to speak with Chris, request a free assessment, or email photos for a quick preliminary review.
We are Underpinning Sydney — structural preservation specialists with over 20 years’ experience. We offer council‑compliant services, licensed teams and engineering‑led methods that restore safety and long‑term stability to your house.
Common signs that need attention include cracked walls, jamming doors, gaps beside windows and uneven floors. Early assessment reduces the risk of costly or irreversible outcomes and gives you clear options.
Our process runs from quick contact and site assessment to a transparent fixed‑price quote and scheduled work with tidy clean‑up. For clear guidance and documented reports, visit Underpinning Sydney or call us to book an inspection.
Key Takeaways
- We provide licensed, insured solutions that prioritise safety and minimal disruption.
- Free no‑obligation structural assessments and transparent fixed‑price quotes are available.
- Early checks for cracks, sticking doors or uneven floors prevent bigger problems later.
- We coordinate engineering reports and council‑compliant certification for your project.
- Speak to Chris on 1300 970 930 or email photos for a fast preliminary review.
Underpinning Sydney — structural preservation specialists safeguarding your home
Our licensed team delivers calm, engineering‑led support to protect your home from movement. We speak plainly and with care. We prioritise safety, compliance and durable outcomes.
Calm, engineering-led guidance for worried homeowners
We give clear advice so you understand what is happening to your structure. Early signs like cracks or sticking doors tell us where to act. Send photos for a quick preliminary assessment, or call 1300 970 930 to book an inspection.
Safety, structural integrity and peace of mind at the core
Our first goal is safety and long‑term stability. We assess risk, explain underpinning methods in simple terms and recommend only what the structure needs.
- Licensed team handles approvals and council and OH&S requirements.
- We outline onsite conduct, access needs and how we protect your home.
- Written scopes and fixed quotes so you know what will be done and why.
- For urgent issues, email photos for a fast review before we visit.
We focus on durable outcomes that restore stability and your peace of mind. Call 1300 970 930 for friendly, engineer‑led help.
foundation repair sydney — when to act and what to look for
Small, new changes can mean serious structural issues. We recommend a quick check around your house as soon as you see symptoms. Acting early keeps options simpler and less costly.
Common internal signs
Look for cracked walls, jamming doors, uneven floors and gaps near cornices or skirtings.
- New or widening cracks in ceilings or walls.
- Doors or windows that stick or no longer sit square.
- Floors that feel sloped or uneven underfoot.
Outside indicators of subsidence
Check for sinking concrete slabs, movement in retaining walls and stressed drainage lines.
These outside signs often point to soil movement under the property or building.
Why early assessment matters
Early inspection limits ongoing damage, reduces overall cost and keeps interventions less invasive. We offer honest advice on urgency and monitoring.
| Sign | Likely cause | Best next step |
|---|---|---|
| Widening wall cracks | Soil movement or settlement | Book an inspection and monitor with photos |
| Sinking slab | Subsidence under slab | Prompt on‑site assessment and plan |
| Sticking doors | Minor to moderate shift in frame | Document and schedule a review |
We document findings and provide compliant scopes and clear options, including foundation repair where needed. Email photos for quick guidance and to book a site inspection. We help protect your home and give you certainty.
Our council‑compliant repair services and methods
We deliver engineered solutions that meet council standards and minimise disruption to your home. Our approach pairs clear scopes with licensed teams and fixed‑price quotes so you know what to expect.
Concrete underpinning for sinking or unstable footings
Concrete underpinning increases bearing capacity where the soil under a house is weak. This method suits larger jobs and can take several days or longer depending on access and scope.
Resin injection ground improvement
Resin injection stabilises weak or voided soils through small drilled holes. It often cures in hours and many residential jobs finish in a day with minimal disruption.
Screw piling for deep load transfer
Screw piles move loads to deeper, competent strata. We use this where near‑surface soils are reactive or access rules out heavy excavation.
Wall crack repairs and structural stitching
We stitch and pin cracked walls to restore strength. Our team corrects causes, not just cosmetic issues, to prevent recurrence.
Subfloor ventilation and retaining wall support
Improved ventilation controls moisture and protects timber. We also remediate retaining walls with supports, drainage and structural detailing to stop movement.
Engineering reports and certification
Our engineers prepare reports, drawings and council certification. Methods are chosen to suit your house, soil profile and building loads. You receive a clear program of works, safe site practices and a tidy handover.
Our engineering process — from free assessment to certified completion
Start with a quick call and photos so we can offer immediate guidance and arrange an inspection. We provide a free assessment to clarify urgency and options for your home.
Book a site inspection or email photos for a preliminary review
Fast triage by phone saves time. Send photos for a prompt, engineering‑led review and we will tell you if an on‑site check is needed.
On‑site structural assessment, monitoring and honest advice
Our team inspects movement, moisture and access. We monitor levels before, during and after the job to protect your property.
We give clear advice on urgency, options and whether you should monitor or act now.
Transparent fixed‑price quote, scope and methodology
After assessment you get a fixed‑price quote that lists scope, method and inclusions line by line. This keeps surprises out of the work and helps budgeting.
Council‑compliant works scheduled for minimal disruption
We coordinate engineering reports and council documentation. Work sequencing is planned to reduce noise and disruption to your daily routine.
Completion, clean‑up and handover with documentation
The job finishes with a tidy handover. You receive engineer sign‑off, compliance documents and practical advice for long‑term care of your foundation.
- Start with a free call and email photos for a fast preliminary review.
- We schedule an on‑site inspection to assess movement, moisture and access.
- You receive honest advice on urgency and monitoring.
- Our fixed‑price quote details scope, methodology and inclusions.
- We coordinate engineering reports and any council documentation needed.
- Work is planned to minimise disruption to your home and routine.
- You’ll know the day‑by‑day process, site safety and expected time on site.
- Our experienced team monitors levels before, during and after works.
- The job finishes with documentation, engineer sign‑off and practical advice.
Call 1300 970 930 and speak to Chris to book your inspection and get straightforward answers from our experienced team.
Why homeowners choose Underpinning Sydney
Homeowners choose us because we combine long-term experience with clear, honest guidance.
Over 20 years’ experience in local soils and house styles means we spot issues early and act sensibly. Our team is fully licensed and insured to protect you and your property.
Safety and compliance matter. We use council‑compliant techniques and strict OH&S practices on every job. That keeps you and our crew safe, and keeps council paperwork tidy.
We stage works to reduce noise, dust and access impacts. We provide a clear, fixed quote and never upsell. You only get the services your house truly needs.
- 20+ years of focused experience with local conditions
- Licensed, insured teams and documented procedures
- Council‑compliant methods and strong OH&S controls
- Minimal disruption, honest scopes and proven results
| Benefit | What it means for you | Outcome |
|---|---|---|
| Experience | 20+ years handling complex projects | Confident, efficient solutions |
| Compliance | Council approval and engineer sign‑off | Documents for sale or valuation |
| Care on site | Staged works, dust and noise control | Less disruption to your daily life |
Call 1300 970 930 to book a site assessment with our experts and regain peace of mind about your home and foundation issues.
Technical approaches matched to your soil and structure
Choosing the right method starts with understanding the ground beneath your home.
When concrete underpinning is the right solution
Concrete underpinning suits localised settlement where bearing capacity must be increased. We use it when footings sit on weak soil and we need a robust load path.
This approach is durable and permanent. It is best for heavier loads and where access allows excavation.
When resin injection is preferred for reactive or voided soils
Resin injection consolidates soils at multiple depths with small holes and minimal excavation. It cures quickly so the job often finishes in a short time.
This technique is ideal for reactive clays, voided fill or re‑levelling slabs with low disruption to your home.
When screw piles provide the safest path to stability
Screw piles transfer loads to deeper competent layers. They work where surface soils fail or where deep load transfer is needed.
We choose screw piles when access or underground services rule out heavy excavation.
Selecting methods based on geotechnical and access constraints
We decide after level monitoring, test pits and, if needed, geotechnical input. Access, services and staging shape the safest approach.
- Concrete underpinning: localised uplift and strong bearing capacity.
- Resin injection: fast, low‑impact stabilisation and levelling.
- Screw piles: deep load transfer where surface soils are unreliable.
- Blended solutions: different techniques for different areas of a building.
| Method | Best for | Access | Typical time on site |
|---|---|---|---|
| Concrete underpinning | Localised settlement, heavy loads | Good access for excavation | Days to weeks |
| Resin injection | Reactive clays, voids, slab levelling | Minimal access; small drill points | Hours to one day |
| Screw piles | Deep transfer to competent layers | Restricted access possible; minimal spoil | Days |
Next steps: we explain limits of lift, outline realistic outcomes and give a documented method statement that meets certification requirements. Call us to arrange monitoring or a geotechnical review so we can recommend the right techniques for your needs.
Costs, timeframes and what to expect on the day
Clear pricing and realistic timeframes are central to how we manage every project. We explain what drives cost and the likely time on site so you can plan your day and your budget. You will get a fixed‑price quote that lists inclusions and exclusions.
What drives cost
Extent of movement, access limitations, footing type and soil conditions determine price. Larger shifts and poor access take more labour and equipment. That increases cost and may extend time on site.
Indicative durations
Resin stabilisation often finishes in hours to a day. Heavy underpinning or piling can take days to weeks depending on scale and access.
Living at home during works
Most homes remain occupied. We stage noisy tasks and use barriers, extraction and dust control to keep your house clean and safe.
- Cost is driven by movement extent, access limits, footing type and soils.
- We provide a fixed‑price quote so you know the full cost up front.
- Resin stabilisation: hours to a day; heavy works: days to weeks.
- We sequence noisy work, protect finishes and manage waste at your home.
- You receive start/finish times, regular updates and documented handover.
| Method | Typical time | Disruption |
|---|---|---|
| Resin stabilisation | Hours–1 day | Low; small drill points |
| Concrete underpinning / piling | Days–weeks | Moderate; staged access |
| Site stitching and patch works | 1–3 days | Low–moderate; localized |
On completion we clean up, inspect walls and floor levels and walk you through results. Our aim is to leave your property safe, tidy and with lasting outcomes so you can get your mind at rest.
Peace of mind: safety, certification and long‑term performance
We make sure every outcome is backed by engineer‑approved procedures and traceable records. You leave with documentation that proves the work met council requirements and engineering standards.
Engineering sign‑off, council compliance and clear documentation
Clear certification protects your property value and gives you confidence when selling or insuring. We include engineer reports, compliance certificates and as‑built notes in every handover pack.
Our team provides photos, level readings and maintenance advice. You get written scopes and the paperwork councils expect.
Moisture management and ventilation to protect repairs
Moisture control is vital for long‑term stability. We design subfloor ventilation and drainage to protect timbers and keep walls dry.
Good airflow and site drainage reduce ongoing issues. We explain simple maintenance tasks that help results last for years and keep your mind at rest.
- Engineer‑approved process for every project.
- Compliance documents for council and future sales.
- Designed moisture management and subfloor ventilation.
- Photos, levels and as‑built notes in the handover pack.
- Ongoing support from our team after completion.
| Deliverable | What you receive | Benefit |
|---|---|---|
| Engineer report | Signed drawings and method statement | Certifies structural solutions and stability |
| Compliance pack | Council paperwork and certificates | Needed for sale, insurance and peace of mind |
| Moisture plan | Ventilation and drainage design | Protects timber and long‑term performance |
For transparent cost guidance and documentation details see our underpinning cost guide. We prioritise safety so you can enjoy lasting results and confidence in your building.
Conclusion
A well‑planned process reduces stress and delivers lasting results for your home. We tailor projects to your property, pick the right solutions for your soil and building, and keep the job organised and clean.
You get a free assessment, a clear fixed‑price quote and full engineering coordination. Our team protects walls, floors and services while work proceeds with minimal disruption.
For practical help and fast guidance call 1300 970 930 and speak to Chris. Book a site inspection or email photos for a prompt preliminary assessment. Explore our financing options to plan your project with confidence.