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The Modular Home Review

Independent UK guides to prefab, modular and offsite homes: costs, planning and the small print.

Planning & Building Regs

Planning & Building Regs

Planning & Building Regs reviews, comparisons and buying guides from The Modular Home Review.

All Planning & Building Regs guides & reviews

Do You Need Planning Permission for a Modular Extension? UK Rules Explained Planning & Building Regs Do You Need Planning Permission for a Modular Extension? UK Rules Explained Most modular extensions fall under permitted development and need no planning permission. Here are the UK size limits, prior approval and building regs rules. 8 min read Do Modular Buildings Need Building Regs Approval? What Still Applies in 2026 Planning & Building Regs Do Modular Buildings Need Building Regs Approval? What Still Applies in 2026 Modular building regulations explained: when approval is needed, the exemptions, the approval routes, and how 2026 rules apply to off-site homes. 8 min read