How much do foundations cost for a timber frame house?

Foundation costs for a typical 3-bedroom timber frame house (approximately 90 m² footprint): Strip foundations £8,000–15,000; Trenchfill £10,000–18,000; Raft slab £15,000–25,000; Screw piles with steel grillage £12,000–22,000. Costs vary significantly with ground conditions — clay sites requiring deep foundations or piling can double these figures.

Foundation costs for a typical 3-bedroom timber frame house (approximately 90 m² footprint): Strip foundations £8,000–15,000; Trenchfill £10,000–18,000; Raft slab £15,000–25,000; Screw piles with steel grillage £12,000–22,000. Costs vary significantly with ground conditions — clay sites requiring deep foundations or piling can double these figures. Foundation costs typically represent 8–15% of total build cost. A site investigation (£1,500–3,000) is essential to determine the appropriate foundation type and avoid costly surprises during construction.

Why this matters

This question relates to Timber Home Foundations: Screw Piles, Raft & Strip Options, which covers the broader topic in detail. Understanding this specific aspect helps architects, builders, and timber dealers make informed specification decisions.

For full context and additional technical detail, see our comprehensive guide:

→ Timber Home Foundations: Screw Piles, Raft & Strip Options

Related questions

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• How deep do foundations need to be for a timber house?

About this answer

This answer is part of the PuurModulair Knowledge Base — comprehensive timber specification guidance for architects, builders, and dealers across the UK, EU, and Scandinavia.