Foundation Repair in Melbourne — Find the Cause, Fix It Once

Almost always, yes. A foundation that is cracking or dropping can be repaired without demolishing the house, by transferring the load to stable ground with underpinning, replacing failed stumps, or re-levelling the floors. The key is diagnosing the cause correctly first, because the wrong repair fixes nothing and the movement returns.

In Melbourne, the most common cause is soil movement, and specifically reactive clay that swells and shrinks with moisture. A leaking drain, a long dry spell or a thirsty tree changes the moisture under one part of the house, the footing there drops, and the wall above it cracks. Read why our ground behaves this way in reactive clay soil melbourne.

Foundation problems announce themselves in predictable ways. Two of the clearest are cracks that grow and doors that stick, and both deserve a closer look.

• Diagonal cracks wider than a 5-cent coin — see cracks in walls when to worry
• Doors and windows that suddenly jam — see sticking doors foundation
• Floors sloping toward one corner of the home
• Gaps at cornices, external corners or where extensions meet

The cause decides the cure. For a home on a strip footing over moving soil, that is usually underpinning melbourne. For a home on failing stumps, it is restumping melbourne. For floors that have dropped but footings that are sound, it is house re-levelling melbourne. If the concrete itself is failing, it may be concrete cancer repair.

Because foundation repair covers several different fixes, the cost depends entirely on the cause and scale. Small localised repairs can start a few thousand dollars, while full structural underpinning can reach $50,000 or more. Our underpinning cost guide breaks down each fix so you can see where your job is likely to land.