Underpinning in Melbourne That Stops Your Home Moving — For Good

Underpinning extends or replaces the foundation beneath an existing building so it reaches firm, load-bearing ground. Your home was built on footings sized for the soil as it was. When that soil moves, the footing is no longer supported and the structure follows it down. Underpinning puts new support underneath the failing footing so the load bypasses the bad soil.

For a full plain-English explainer, read what is underpinning and how it works.

Much of Melbourne sits on reactive clay. It swells when wet and shrinks when dry, and over a hot summer or a leaking drain it can move a footing enough to crack brickwork and jam doors. Older homes with shallow footings, homes near large trees, and homes on cut-and-fill blocks are the most exposed.

The local soil is the part most national contractors skip. Understanding reactive clay soil melbourne is how we match the right fix to your ground instead of selling one product to every house.

Underpinning is usually the answer when the movement is structural rather than cosmetic. Watch for stair-step cracks in brickwork that are wider at the top, doors and windows that suddenly stick, gaps opening where the wall meets the ceiling, and floors that slope toward one corner.

Not every crack means trouble. Our guide to the signs you need underpinning shows you how to tell a warning sign from a harmless hairline crack.

• Diagonal or stair-step cracks that keep growing
• Doors and windows that jam for no clear reason
• Floors that slope, dip or bounce underfoot
• Gaps at cornices, skirtings or external corners
• A wall or corner that looks like it is pulling away

There is no single best method, only the right method for your home. We use three, and we recommend the one your soil and access call for, not the one that suits us.

• mass concrete underpinning — the proven, permanent option for most homes
• screw pile underpinning — deep support for soft or deep reactive clay
• resin injection underpinning — non-invasive lifting without excavation

Sometimes. If your home sits on timber or concrete stumps rather than a strip footing, the fix is usually restumping melbourne, not underpinning. If the movement is minor and stable, monitoring may be all you need for now. And if the floors have dropped but the footings are sound, house re-levelling melbourne can bring them back to true.

The only way to know which you need is an inspection. We will tell you the cheapest fix that actually solves the problem.

Underpinning is priced by the number of piers, the method and how deep firm ground sits, so a fair figure only comes after someone counts and measures on site. As an indicative Melbourne range, underpinning commonly runs from around $10,000 for a small localised job to $50,000 or more for a full structural rebuild.

See the full breakdown, including what drives the price, in our underpinning cost guide, or get a ballpark now with the underpinning cost calculator.

Every job runs the same honest way: free inspection, written assessment, fixed quote, the work, and a final level check. See exactly what to expect at each stage on our underpinning process page.