Underpinning Cost Calculator
Estimate the cost of underpinning, strengthening or stabilising foundations that have moved or subsided. It is priced per pier or per metre of wall, and the method and depth drive the cost, along with engineering.
Your underpinning details
Your estimate sits within the typical range.
Underpinning always needs engineering and usually a geotechnical (soil) assessment first, the cause of the movement determines the fix. Underpinning without understanding the cause can fail again.
Underpinning stabilises foundations that have moved, usually due to reactive clay soil, poor drainage or tree roots. The number and depth of piers and the method drive the cost, and an engineer must design it.
💰 Ways to save
- Fix the cause too, drainage, leaking pipes or problem trees, or the movement can return after underpinning.
- Get a proper engineering and soil assessment, the right method for your situation avoids over- or under-spending.
- Act early, minor settlement is far cheaper to underpin than a house that has moved badly.
or from $80/week over 5 years , indicative finance
How we estimate this
Underpinning in Australia typically costs around $1,000 to $2,000 per pier in 2026, so a typical job of 8 to 12 piers is often $10,000 to $25,000, with major foundation repairs running $40,000 to $60,000. Engineering and difficult access add to that.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding underpinning costs in Australia
Underpinning in Australia typically costs around $1,000 to $2,000 per pier in 2026, so a typical job of 8 to 12 piers is often $10,000 to $25,000, with major foundation repairs running $40,000 to $60,000. Engineering and difficult access add to that.
The number and depth of piers, the method (concrete, screw piles or resin) and the engineering drive the cost. Underpinning must address the cause of the movement, usually soil, drainage or trees, or the problem can recur.
Frequently asked questions
How much does underpinning cost in Australia?
Roughly $1,000 to $2,000 per pier in 2026, so a typical 8 to 12 pier job is often $10,000 to $25,000. Major foundation repair can reach $40,000 to $60,000. Engineering adds more.
What causes a house to need underpinning?
Usually foundation movement from reactive clay soil, poor drainage, leaking pipes or tree roots. Underpinning stabilises the foundation, but the underlying cause must also be fixed to stop it recurring.
Are you a underpinning / foundation contractor?
Everyone on this page is working out what underpinning costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.