What is the biggest cost driver in a timber home?

The structural timber frame typically represents only 12–18% of total construction cost. The biggest cost drivers are: finishes and fit-out (kitchens, bathrooms, flooring — 20–30%), mechanical and electrical services (15–20%), foundations and groundworks (8–15%), and windows/doors (8–12%).

The structural timber frame typically represents only 12–18% of total construction cost. The biggest cost drivers are: finishes and fit-out (kitchens, bathrooms, flooring — 20–30%), mechanical and electrical services (15–20%), foundations and groundworks (8–15%), and windows/doors (8–12%). Optimising these elements has more impact on total cost than the choice of structural system.

Why this matters

This question relates to Cost of Building a Timber Home in 2026: Detailed Breakdown, 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:

→ Cost of Building a Timber Home in 2026: Detailed Breakdown

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• How much does the timber structure itself cost?

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.