Screw pile cost: what drives the price?
Five factors shape every quote: ground conditions, pile size, quantity, site access, and working space.
What drives screw pile cost
Seven variables determine the per-pile and total project price.
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Pile size and wall thickness Steel cost scales with cross-section and length. Shaft diameter Ø60.3 to Ø323.9, wall 2.9 to 12.5 mm. Ø168.3 uses about 3x the steel of Ø88.9 at the same length.
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Pile length More depth, more steel. Residential 2 to 5 m, solar 3 to 6 m, heavy infrastructure 16 to 22 m using extensions.
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Helix count and size More helices or larger diameter raises capacity per pile. Multi-helix costs more per pile but can reduce total pile count enough to lower overall price.
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Soil conditions Soft soils need longer piles, dense soils need bigger drive heads, layered profiles need design optimisation. CPT data sizes the pile economically. Most cost surprises come from sites where ground investigation was skipped.
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Quantity Volume discounts on steel, galvanizing, and crew mobilisation. A 50-pile residential project has a higher unit cost than a 5 000-pile solar farm at the same spec.
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Site distance and access Remote sites add fixed mobilisation cost. Restricted access (urban infill, slopes, water crossings) needs smaller or specialised machinery.
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Working space A clear, level site lets the drive head move pile-to-pile in minutes. Constrained, sloping, or vegetated sites multiply cycle time. For repeat-pattern projects like solar, this is the biggest driver of installation cost.
PRO vs HELIX: two pricing tiers
HELIX installs by handheld drill for residential and light commercial: decks, fences, sheds, small buildings. Lower cost per pile, no heavy equipment.
PRO installs by excavator-mounted drive head for commercial, industrial, energy, and infrastructure. Larger diameters, higher capacity. Higher cost per pile, but the per-unit cost drops with volume.
Screw piles vs concrete: where the cost goes
The pile itself is one cost line. Site preparation, equipment, labour, and timeline are the rest.
| Cost Factor | Screw Piles | Concrete Foundations |
|---|---|---|
| Excavation | Not required | Required - excavation + soil disposal |
| Formwork | Not required | Required - materials + labour |
| Curing time | None - instant load capacity | 28 days for full strength |
| Frost protection | Not required | Usually required - insulation + materials |
| Drainage | Not required | Usually required - design + installation |
| Labour hours | Low - single-step installation | High - multiple trades and phases |
| Equipment | Excavator or hand drill | Excavator + concrete truck + pump |
| Total project time | Hours to days | Weeks |
| Removal cost | Low - fully removable and reusable | High - demolition required |
| Total foundation cost | Lower in most cases | Higher in most cases |
Cost by application
Different load classes, different pile spec, different cost profile.
Residential & DIY
HELIX rangeDecks, fences, sheds, garden rooms, small cabins. HELIX installs with a handheld drill. No excavator, no concrete.
Commercial
PRO rangeWarehouses, modular buildings, retail units, car parks. PRO installs by excavator-mounted drive head. Faster project delivery vs concrete on most sites.
Industrial & solar
PRO rangeSolar farms, BESS, industrial halls, infrastructure. Volume pricing on steel and crew. Installation rates 200 to 400 piles per day per crew.