Part L Services

L1B Extensions

About Part L1B for Extensions

Extensions to existing dwellings must comply with Part L1B of Building Regulations.  Compliance will very often be confirmed following a series of inspections by the Building Control Officer.

Where an extension has high levels of glazing as a percentage of the extension floor area, there are three methods set out in Part L1B of Building Regulations to show Compliance.

The Building Control Officer may request calculations from a SAP Assessor to show the design complies with Part L1B.

At Energise, we have lots of experience in this field and can provide calculations, advice and recommendations to help achieve L1B Compliance in practical and cost effective ways.