What Is Mini Piling?

Mini piling is a specialist foundation solution used where traditional trench foundations are unsuitable due to poor ground conditions, restricted access, or structural requirements.

Unlike conventional foundations, mini piles transfer the building load deeper into stable ground using small-diameter reinforced concrete piles.

Mini piling is particularly common across London due to:

• Clay shrinkage
• Tree influence
• Made ground
• Terraced housing with restricted access

When Is Mini Piling Required?

Mini piling is typically required when:

• Trial pits show unstable soil
• Building control requires deeper foundations
• Trees are influencing the ground
• Access prevents large piling rigs
• Excavations become too deep for trench fill foundations

In many London boroughs, piling is now standard for rear extensions.

How Does Mini Piling Work?

The process involves:

1. Positioning a compact piling rig
2. Drilling to the required depth (often 5m–15m in London)
3. Installing steel reinforcement
4. Pouring concrete
5. Connecting piles with reinforced ground beams

This creates a stable structural base for your extension or new build.

What Are the Advantages of Mini Piling?

• Suitable for restricted access
• Less excavation required
• Reduced risk of ground movement
• Ideal for clay soils
• Can minimise disruption to neighbours

Is Mini Piling Noisy?

Modern rotary bored mini piling methods are low vibration and suitable for terraced properties.

We select piling methods based on site constraints and neighbouring structures.

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