How much does a prefab timber cabin cost?

Prefab timber cabin costs vary significantly by specification and size. Budget garden offices (insulated shed quality): £500–800/m².

Prefab timber cabin costs vary significantly by specification and size. Budget garden offices (insulated shed quality): £500–800/m². Mid-range garden offices (fully insulated, plastered, electrics): £1,200–1,800/m². High-specification garden offices (passive house level, full services): £2,000–3,000/m². Self-contained ADUs/annexes (kitchen, bathroom, full services): £2,500–4,000/m². For a typical 20 m² garden office, expect £24,000–60,000 all-in depending on specification. Foundation, services connection, and landscaping add 15–25% to the cabin cost.

Why this matters

This question relates to Prefab Timber Cabins: Garden Offices, ADUs & Granny Annexes, 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:

→ Prefab Timber Cabins: Garden Offices, ADUs & Granny Annexes

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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. All technical content is reviewed by qualified timber technologists before publication.