Foundation Repair & Remedial Building Specialists in Adelaide
Fixing cracked walls, sinking foundations, and subsiding homes across South Australia.

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Licensed Builder
Fully Insured
25+ Years Experience
10-Year Guarantee

25 +
years building across SA
10 +
years guarantee on all our work
2023
MBA National Excellence Award
AllenCo Construction
A Complete Solution for Your Foundation Repairs
When a foundation moves, the cracks are only the surface of the problem. Most builders handle either the underpinning or the wall repairs, leaving homeowners to coordinate trades, chase warranties between contractors, and hope it all lines up.
AllenCo Construction provides remedial building and underpinning across Adelaide and South Australia. We diagnose the cause, underpin the foundation, and complete the wall crack repairs ourselves. One quote, one team, one point of accountability from the first inspection to the final coat of paint.
Our Services
Foundation Repair Services
Underpinning
When your foundation has dropped or your home is showing structural cracks, underpinning extends new footings down to stable ground to lift and stabilise the building. Steel-reinforced concrete piers, backed by our 10-year guarantee.

Remedial Building and Rectification
Once the foundation is stable, the remedial works begin. Repairing the cracks, mortar joints and rendered surfaces left behind by foundation movement, carried out by the same licensed builder who did the underpinning.

Wall Crack Repair
We use proven crack stitching methods, repointing and rendering techniques to repair wall cracks the right way. From hairline cosmetic cracks through to large structural splits in brick walls, all the way to the final coat of paint.
