Foundation Repairs
Quick answer
Romans Building Services provides foundation repairs across Sydney, with Minas Romanakis assessing the work and matching the repair method to the building, material and suburb.
- Base
- Strathfield
- Updated
- 2026-05-29
- Established
- 1995
- ABN
- 49 641 892 677
Cracks in the walls, doors that stick, floors that slope. These are usually signs of foundation movement. It is the bit you cannot see but it holds everything up. If the foundation is failing, everything above it is at risk.
Minas has been repairing foundations across Sydney for over 30 years. Underpinning, restumping, crack repairs, and stabilisation. We work on sandstone footings, brick piers, concrete slabs, and everything in between.
We work with structural engineers to get the diagnosis right and the fix right. No guesswork. Just a proper assessment, a clear plan, and solid work that stops the movement for good.
Specialised Services
We cover all aspects of foundation repairs. Click through for details on each.
What We Cover
Underpinning
Mass concrete and screw pile underpinning to stabilise foundations that have settled or moved. Done in stages to keep the building safe.
Restumping
Replacement of deteriorated timber or brick stumps with new concrete or steel adjustable stumps. Levels the building and stops further movement.
Foundation Crack Repairs
Epoxy injection and structural repair of cracked foundations. Stops water entry and restores structural integrity.
Foundation Assessments
On-site inspection of foundation condition. We check for movement, cracking, moisture, and bearing capacity issues.
Retaining Wall Foundations
Repair and replacement of failed retaining wall footings. Proper drainage and engineering to prevent future movement.
Pier & Beam Repairs
Repair and replacement of damaged piers, bearers, and joists. Concrete, steel, or timber depending on the building type.
Common Questions
How do I know if my foundation needs repair?
Common signs include stair-step cracks in brickwork, doors and windows that stick, sloping floors, gaps opening between walls and skirtings or ceilings, and cracks wider than 5mm. If multiple signs are present or cracks are actively growing, get an inspection soon.
What is underpinning and when is it needed?
Underpinning extends existing footings deeper to reach stable ground. It is needed when soil movement, leaking pipes, tree roots or undersized original footings are causing the building to move. Traditional mass-concrete underpinning or modern screw-pile underpinning depending on site conditions.
How long does underpinning take?
Traditional mass-concrete underpinning on a 6-pier residential job typically 2 to 4 weeks. Screw-pile underpinning is faster, often 1 to 2 weeks. Crack stitching and interior make-good add another 1–2 weeks after underpinning.
Will I need to move out during foundation repairs?
Usually not. Most foundation work is done from outside or underneath the building. There will be noise and vibration during the digging stage, but the house remains structurally safe to live in throughout the process.
How much does underpinning cost?
$2,500 to $7,000 per pier is typical, with houses needing between 4 and 20 piers depending on severity. Total cost $15,000 to $100,000+ including engineering fees. Screw piles are often cheaper than traditional mass concrete but depend on soil conditions.
Do I need a structural engineer for underpinning?
Yes. The engineer designs the underpinning, certifies the installation and provides documentation for insurance, council or resale. We work with engineers regularly and can bring one in or work with one you have engaged.
Will my insurance cover underpinning?
Depends on the policy and cause. Movement caused by a leaking pipe is often covered; movement from reactive clay alone usually is not. Check your PDS. We can provide documentation to support claims where the cause is covered.
Problems foundation repairs fixes
If you are seeing any of these, this is the work we do. Each guide explains the signs, causes and proper repair.
Where we do foundation repairs
Recent work across these Sydney suburbs. Click through for local context on the housing stock and common issues we see.
Need a quote?
Call Minas directly or fill in the form. We will get back to you within 24 hours.
We provide foundation repairs services across Sydney metro suburbs