Tag: Ventilation (Part F)

Rear view of a UK brick house comparing Extensions and Conservatories, showing a modern flat-roof home extension and a glass conservatory in a landscaped garden setting.

Extensions and Conservatories – Costs, Rules & Design Options (UK Guide)

March 6, 2026 No Comments

Extensions and Conservatories can both add space, but they differ on comfort, costs and compliance. This UK guide explains planning permission vs permitted development, when Building Regulations apply, and design options that work year-round. Learn common pitfalls, how to connect a glazed room to an extension, and the smartest next steps.

Cross-section diagram of a residential house highlighting key energy efficiency components such as insulation, airtightness, ventilation, and high-performance materials, in compliance with Building Regulations Part L.

Building Regulations Part L: Insulation, Energy Efficiency & What You Must Know

December 14, 2025 No Comments

Building Regulations Part L sets the energy efficiency rules for UK home projects. This guide explains what Part L covers, how U-values and insulation affect extensions and conversions, and why ventilation (Part F) matters when you improve airtightness. Learn what Building Control looks for, what evidence to keep, and how to avoid costly changes mid-build.