We provide engineered foundation repairs for commercial properties in Sydney and restore stability with minimal disruption. We give clear advice, fixed-price quotes, and free no-obligation structural assessments so you can act fast.
We are Underpinning Sydney, with over 20 years’ experience protecting homes, strata and business assets from foundation failure. Our approach is council-compliant and backed by engineer certification.
Common signs of subsidence include uneven floors, cracked walls, jammed doors and sunken slabs. We diagnose early and match solutions — concrete underpins, resin injection or screw piling — to your building and soil profile.
We coordinate engineering reports and complete council-ready documentation. Call 1300 970 930 to speak to Chris, book an inspection or email photos for a fast preliminary review.
Key Takeaways
- We deliver engineered solutions to restore foundation stability with minimal disruption.
- Free structural assessments and transparent, fixed-price quotes help you plan budgets.
- We provide council-compliant documentation and coordinate engineer reports for approvals.
- Multiple repair methods suit different soils and building types, from resin to screw piling.
- Our team has decades of practical experience and prioritises honest, practical advice.
Trusted structural preservation for Sydney’s commercial and strata assets
We give building owners clear guidance and certified repair plans to safeguard property investments. Our licensed team has over 20 years’ experience and delivers calm, practical advice that reassures owners and managers.
Safety and compliance are central. We focus on lasting structural integrity and provide engineer certification and council-compliant documentation at handover.
- We protect foundations and the fabric of your building with engineered methods and staged work to limit disruption.
- Your project manager gives plain-language updates, schedules access to reduce noise and dust, and keeps tenants informed.
- Early intervention limits problems, lowers lifecycle costs and helps maintain trading hours for businesses on-site.
- Transparent scope, fixed-price quotes and no upsell pressure from an experienced, insured team across key areas of the city.
| Issue | Typical sign | Impact | Our outcome |
|---|---|---|---|
| Facade cracking | Visible cracks on external walls | Safety and appearance risks | Staged repairs with engineer sign-off |
| Slab settlement | Sunken loading zones, uneven floors | Operational disruption | Targeted stabilisation to restore levels |
| Jamming doors/windows | Doors stick or frames distort | Access and security issues | Diagnostic monitoring and prompt repair |
Recognising foundation movement in commercial buildings
Noticing odd gaps or sticking doors often marks the first stage of subsidence. Early detection protects safety and stops repair costs rising.
We inspect obvious operational red flags first. Look for new or widening cracks in walls and ceilings near openings. Note doors and windows that bind, won’t latch or show misalignment.
Watch for uneven floors in offices, warehouses or retail fitouts. Outside, check facades for stepped cracking, mortar loss or slab edges that have sunken and ponded. Retaining walls that lean or bow signal changed earth pressure or footings moving.
- Gaps at skirtings, cornices or frames suggest movement.
- Voids beneath footings or trip hazards at slab edges need urgent attention.
- Untreated movement increases damage and brings safety and compliance issues.
We offer a free preliminary assessment. Email site photos for a fast review and honest, no-pressure advice. We identify root causes and recommend targeted repair to stabilise your building efficiently. For a prompt response, visit our inspection page.
Why foundations move in Sydney: soils, water and load dynamics
Changes in ground conditions explain most foundation movement. We see the same drivers at many sites. Understanding them helps prevent recurrence with an engineered fix.
Moisture variation, erosion and broken services driving subsidence
Water leaks from pipes and rain can soften soil quickly. That loss of support leads to local settlement and visible subsidence.
Erosion at edges and ponding near slabs speeds differential movement. We target the cause before repair to avoid repeat settlement.
Trees, drought, reactive clays and poorly compacted fill
Sydney’s reactive clay soils shrink and swell with moisture. Large trees and drought amplify this change. Poorly compacted fill from past construction also reduces bearing capacity beneath a building.
- Reactive clays cause seasonal movement in concentrated areas.
- Broken services and edge wetting trigger soft spots under loaded zones.
- Where soil weakness is the root cause, multi-depth treatment or deeper footings perform best.
Engineered solutions such as resin injection to densify soils, or screw piles to reach competent strata, align repair to the site cause. For detail on clay behaviour, see our reactive clay soils guide.
Compliant underpinning methods engineered for commercial performance
Our repair methods match each site’s soil profile and loading to restore safe, lasting foundations. We select techniques that suit the building, access and operational needs to limit downtime and risk.
Resin injection: fast, low‑disruption soil consolidation
Injection uses expanding polyurethane to compact weak soil and fill voids. It works from about 0.8 m to 6.5 m depth and is quiet with small access requirements.
Benefits: rapid stabilisation, minimal noise and limited site intrusion.
Concrete footings: deeper mass for enduring capacity
Concrete underpins extend bearing depth and add mass where loads demand a permanent solution. They suit heavy foundations and areas needing high load capacity.
We design the footing depth to match soil reports and engineer load calculations.
Screw piling: steel piers to competent strata and precise re‑levelling
Screw piles reach stable layers and allow controlled lift for re‑levelling. They are efficient where deeper competent strata are present.
We use screw piling for structural lifts, long‑term support and where minimal excavation is preferred.
Design, certification and council‑ready documentation
Our process includes engineering design, certification and a council‑compliant compliance pack. We stage work around trading hours and access constraints.
- We pick methods by foundation condition, soil profile and building loads.
- Materials and techniques meet Australian standards and local regulations.
- Monitoring points and clear method statements verify movements during and after the project.
End-to-end services that stabilise, repair and prevent recurrence
Our team delivers full‑scope repairs that stabilise foundations and stop problems returning. We align engineered methods to your property needs and programme the work to limit disruption.
Concrete underpinning for heavy loads
Concrete underpins add mass and depth where plant rooms or warehouses demand lasting capacity. They suit heavy foundations and long-term loads.
Polyurethane resin injection for slab re-levelling
Resin injection is non‑invasive. It fills voids, improves soil density and can re‑level slabs quickly with minimal downtime.
Screw piling for extensions and poor ground
Screw piles reach competent layers and support changes of use or added loads. They limit excavation and allow controlled lifts.
- Wall crack repairs restore structural continuity and finishes.
- Subfloor ventilation reduces moisture to help prevent future movement and water damage.
- Retaining wall support addresses leaning, sliding and drainage issues.
- Structural engineering reports are coordinated for design, certification and council compliance.
| Solution | Primary benefit | Typical use |
|---|---|---|
| Concrete underpins | Long-term load capacity | Plant rooms, heavy footing repair |
| Resin injection | Void filling and quick re-levelling | Office slabs, retail floors |
| Screw piling | Deep support with minimal excavation | Extensions, poor soil sites |
| Ventilation & crack repair | Moisture control and finish restoration | Basements, subfloors, facades |
Expect clear sequencing, safe work methods and a single accountable project lead. For larger projects, timelines are longer than a typical home job because access and scope differ.
Who we support across Sydney’s built environment
We partner with facility teams and engineers to design repair work that fits active buildings and tight schedules. Our approach keeps your operation open and your compliance records clear.
Strata and property portfolios
We support strata managers and property owners with repeatable, predictable delivery. Clear communication and safety plans help maintain tenant confidence.
Industrial facilities and logistics slabs
Warehouses and transport hubs need durable fixes and staged access. We coordinate with contractors so heavy operations continue with minimal interruption.
Education, health and government projects
Work in schools, hospitals and government buildings follows strict OH&S and access regimes. We supply full documentation and certified scopes for each project.
- Our team plans construction to protect critical services and trading hours.
- Experience across local areas gives us fast insight into site constraints and soils.
- Expect a single point of contact, transparent reporting and a full handover pack for portfolio records.
Our process: safe, engineered, minimal disruption
Licensed assessors review site conditions first to shape an engineered scope that fits the building and the issue. We plan each project to protect occupants and reduce downtime.
Free no-obligation structural assessment — email photos for a preliminary review
Send photos and we’ll give a fast, photo-based preliminary assessment and immediate advice on likely next steps. This quick check helps you decide if further inspection is needed.
Engineering-led scope, soil insight and fixed-price quote
We complete a site inspection, soil review and condition survey. You receive a fixed-price quote with a clear scope and inclusions to control cost and time.
Execution plan around trading hours to keep doors open
Work is staged to align with trading hours. Resin injection and other methods often allow short job times with limited noise and dust.
Certification, compliance pack and monitoring recommendations
- Calibrated monitoring guides lift and movement on the job.
- Certified engineers sign off design and completion.
- We supply a full compliance pack and ongoing monitoring advice for long-term results.
| Stage | What we do | Benefit |
|---|---|---|
| Assessment | Photo review + site inspection | Fast advice and clear next steps |
| Design & Quote | Soil review and fixed-price proposal | Cost control and time certainty |
| Execution | Staged work around trading hours | Minimal disruption to business |
| Handover | Certification and monitoring plan | Certified results and peace of mind |
Call 1300 970 930 to speak to Chris and book your assessment, or visit our foundation repair page for more detail.
Proven, insured and accountable — your assurance of quality
Our team holds full licences, comprehensive insurance and a track record of reliable results.
We bring 20+ years’ experience in foundation repair and underpinning for complex sites. Our reports and methods meet council requirements and engineer certification.
Honest assessments are standard. We will not recommend unnecessary work. You receive clear scope, fixed pricing and documented warranties on materials and workmanship.
- Licensed builders and accountable contractors on every job.
- Documented OH&S, risk assessments and ISO-aligned systems for larger sites.
- Robust QA, independent inspections welcomed and full handover packs.
| Assurance | What we provide | Benefit |
|---|---|---|
| Licensing & insurance | Registered builder, public liability cover | Work is compliant and financially protected |
| Safety systems | Method statements, risk registers, site inductions | Safe execution on occupied sites |
| Certification & warranty | Engineer sign-off, material and workmanship warranties | Proven repairs and long-term confidence in results |
For clear advice and verified documentation, call Chris on 1300 970 930. We stand behind every repair and offer peace of mind at handover.
Timeframes and pricing clarity for commercial underpinning
Clear timelines help owners plan around trading hours and keep operations moving.
What influences duration: access, soil, loads and project staging
Duration depends on access, soil type, load levels and staging needs. Resin jobs for residential slabs can finish in hours. Larger foundation repair work for buildings often takes a day or longer.
Injection depth varies from 0.8 m to 6.5 m based on geotechnical factors. Planning approvals may be required and add time to the project.
Transparent fixed-price quotes with no upsell and minimal downtime
We provide fixed-price quotes that list scope, inclusions and allowances. This controls cost and reduces surprises.
- We advise approvals and construction constraints up front.
- We sequence work zones to minimise downtime and keep safe access.
- We give practical advice on likely problems and contingency planning.
| Factor | Effect on time | Our approach |
|---|---|---|
| Access & site constraints | May extend setup and work hours | Staged access and night or weekend work where needed |
| Soil & depth | Controls method and duration | Match resin, concrete or screw piles to soil report |
| Load & building use | More complex scope for heavy loads | Engineer-led plan and fixed-price quote |
Call 1300 970 930 for clear advice, to compare options and lock in a delivery timeline for your property.
commercial underpinning services sydney
Rapid local response and council-aware design reduce downtime and secure lasting foundation outcomes.
Local expertise across Sydney metro and surrounding areas
We deliver underpinning across the metro and nearby areas with fast local response. Our team knows local soils and council rules. This means compliant, timely work that fits your site constraints.
Outcomes that matter: stability, safety and peace of mind
Expect safer floors, straighter walls and operational continuity. We address subsidence signs like uneven floors, binding windows and facade cracking quickly.
Engineer-led scopes give certified handover and clear maintenance steps. Foundation repairs are matched to the risk and condition of your property.
- Fast photo review — email site photos today for a preliminary assessment.
- Fixed-price plan and scheduling to suit tenants and access.
- Book a site inspection to confirm the best path to stability.
| Symptom | Local response | Outcome | Next step |
|---|---|---|---|
| Uneven floors | Priority inspection | Levelled, safe floors | Photo review then site visit |
| Facade cracks | Engineer assessment | Stabilised walls | Design & certified repair |
| Jammed windows/doors | Targeted diagnosis | Restored operation | Controlled lifting or soil treatment |
Call 1300 970 930 and speak to Chris for a fixed-price plan and schedule.
Conclusion
A fast inspection turns uncertainty into a clear plan for stabilising your foundation and protecting your property.
If you see new cracks, gaps, sloping floors or binding windows and doors, act early. Our team designs practical foundation solutions that stop damage and restore stability with minimal disruption.
We coordinate engineering and council-compliant documentation for your project. Methods include targeted injection and concrete works where the soil or load requires deeper treatment.
Licensed, insured contractors complete the work and provide certified handover and maintenance guidance. Call Chris on 1300 970 930 or email photos today for a fast preliminary review and to book a site inspection.