Underpinning Adelaide: remedial and restumping contractors

Adelaide is known for highly reactive clay soils and a hot, dry climate that swings ground moisture hard between seasons, a leading cause of footing movement and cracking in local homes. Much of the Adelaide Plains sits on the Keswick and Hindmarsh Clay formations, expansive soils that geotechnical studies have recorded moving tens of millimetres between wet winters and dry summers, which is why a site classification report, rated from stable Class A through to extremely reactive Class E under the AS 2870 standard, is required before footings are designed for a new build or major addition. Older bluestone and sandstone homes on shallow strip footings, common across the inner suburbs, tend to show that movement as cracking sooner than newer houses built to a modern engineered slab, which is one reason a property's age and construction type matter as much as its suburb. Consistent garden watering and good drainage away from the footing line through the drier months help even out the moisture swings that drive most of this seasonal movement. Below is a starter sample of remedial and underpinning specialists serving greater Adelaide; the full contractor list continues to grow.

12 providers listed

Use each profile as a starting point, then ask the provider for current service, licence and insurance details.

Typical underpinning runs about $4,000 to $15,000 (a guide, not a quote). See the underpinning cost guide before you compare quotes.

Curious how Adelaide's soil compares to other capitals? Read reactive clay and subsidence risk by city.

For a useful shortlist, match the contractor's service focus to the symptom you are seeing: cracks and sloping floors usually need foundation or underpinning experience, while rust stains, spalling concrete and failed balcony waterproofing point toward remedial building work.

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5.0 (11 Google ratings)

Adelaide Underpinning Group operates in the Mawson Lakes, SA area, offering remedial building services. Contact them directly for a current quote.

Complete Underpinning

Adelaide, SA

5.0 (14 Google ratings)

Complete Underpinning serves Woodcroft, SA with remedial and underpinning services.

5.0 (11 Google ratings)

Screw pier underpinningRestumping / reblockingStructural crack repair

JR Southern Underpinning is a remedial building contractor based in Mount Barker, SA, including screw pier underpinning, restumping and reblocking and structural crack repair. Reach out directly to confirm availability and current rates.

4.9 (52 Google ratings)

Restumping / reblocking

Based in Glynde, SA, Structural Restoration Services offers underpinning and structural repair services to local homeowners, including restumping and reblocking.

Allenco Construction

Adelaide, SA

4.6 (58 Google ratings)

Structural crack repairWorks from engineer's report

Allenco Construction serves Unley, SA with remedial and underpinning services, including structural crack repair.

4.8 (26 Google ratings)

Waterproofing

Urathane Solutions Pty Ltd is a remedial building contractor based in Kent Town, SA, including waterproofing. Reach out directly to confirm availability and current rates.

Mainmark

Adelaide, SA

4.8 (44 Google ratings)

Resin injection

Mainmark operates in the Lonsdale, SA area, offering remedial building services, including resin injection. Contact them directly for a current quote.

Adelaide Screwpiling

Adelaide, SA

5.0 (1 Google ratings)

Screw pier underpinning

Adelaide Screwpiling is a remedial building contractor based in Burton, SA, including screw pier underpinning. Reach out directly to confirm availability and current rates.

4.7 (13 Google ratings)

Concrete underpinningResin injectionStructural crack repairStrata / apartment experience

Rectify - Underpinning South Australia , Chemical Underpinners operates in the Adelaide, SA area, offering remedial building services, including concrete underpinning, resin injection and structural crack repair. Contact them directly for a current quote.

Patch and Caulk

Adelaide, SA

4.4 (7 Google ratings)

Concrete cancer repairWaterproofingStructural crack repair

Based in Edinburgh, SA, Patch and Caulk offers underpinning and structural repair services to local homeowners, including concrete cancer repair, waterproofing and structural crack repair.

5.0 (2 Google ratings)

Concrete cancer repairStructural crack repair

Ballestrin Construction Services Pty Ltd is a remedial building contractor based in Dry Creek, SA, including concrete cancer repair and structural crack repair. Reach out directly to confirm availability and current rates.