Screw Pile Underpinning in Melbourne — Deep Support for Bad Soil
Screw piles reach deep, stable ground when the soil near the surface is soft or reactive. We drive helical piles to load-bearing depth and transfer the house onto them.
- Free on-site inspection
- Honest fixed quote
- Permits handled
Screw pile underpinning in Melbourne supports a home by driving steel helical piles (screw piles) down to firm, load-bearing ground, then transferring the building load onto them. When the soil near the surface is soft, deep or heavily reactive, surface fixes do not last. Screw piles bypass the bad soil entirely and anchor into the stable ground below.
They are the method of choice for deep reactive clay and problem sites. We assess your soil and depth first, then quote a fixed price per pile.
What are screw piles?
Screw piles, also called helical piles, are steel shafts with a helical plate at the tip. They are screwed into the ground like a giant bolt until they reach a soil layer strong enough to carry the load. A bracket then connects the pile to the footing so the house sits on the pile, not on the weak soil.
How the process works
Each pile is driven hydraulically to a measured torque, which confirms it has reached load-bearing capacity. Because the torque is monitored as the pile goes in, we know each one is founded on firm ground before the load is transferred. The footing is then supported off the piles and re-levelled.
When it is the right method (and when it is not)
Screw piles win where the ground is deep and soft, on sites with high water tables, and where a fast, low-vibration install matters. For shallow, firm soils, mass concrete underpinning is often more economical, and for minor lifts, resin injection underpinning may be enough. We recommend the method your soil calls for.
Cost of screw pile underpinning
As an indicative Melbourne range, screw piles cost around $1,200 to $2,500 per pile, with the number of piles and the depth to firm ground driving the total. See the comparison in our underpinning cost guide.
What it costs in Melbourne
Indicative ranges to help you plan. Your fixed price is confirmed after a free inspection.
| Work | Indicative range | Priced |
|---|---|---|
| Screw pile underpinning Helical piles driven to load-bearing depth — often the answer in deep reactive clay. | $1,200 – $2,500 | per pile |
These are indicative Melbourne market ranges to help you plan, not a quote. Your exact fixed price is confirmed in writing after a free on-site inspection, once we have counted the stumps or piers and checked the soil and access.
Book free inspection
Tell us what you are seeing. We will call back to arrange a free inspection and a fixed written quote. No obligation.
Frequently asked questions
Common questions about screw pile underpinning. Still unsure? Call 04XX XXX XXX.
What is screw pile underpinning?
Screw pile underpinning supports a home on steel helical piles driven down to firm, load-bearing ground, bypassing soft or reactive surface soil. Bedrock Foundations monitors the install torque so each pile is proven to reach stable ground.
When are screw piles better than concrete underpinning?
Screw piles suit deep or soft soils, high water tables and sites needing a fast, low-vibration install, while shallow firm soils often suit mass concrete. Bedrock Foundations checks your soil before recommending either.
How much does screw pile underpinning cost?
As an indicative Melbourne range it is about $1,200 to $2,500 per pile, with the total driven by the pile count and depth. Bedrock Foundations gives you a fixed written price after a free inspection. Call 04XX XXX XXX.
Do screw piles cause vibration or damage?
No, screw piles are screwed in rather than hammered, so vibration is low and disruption is minimal. That is one reason Bedrock Foundations often chooses them for occupied homes on difficult soil.
Not sure what your home needs? Find out for free.
Book a free on-site inspection and get an honest, fixed written quote. We will even tell you if you do not need the work yet.