Part L: Calculations for converted dwellings

When a dwelling undergoes one of the following material changes of use, a SAP is required to ensure it is compliant with Part L.

• Is used as a dwellings, where previously it was not

• Contains a flat, where previously it did not

• Contains a greater or lesser number of dwellings than it did, having previously contained at least one dwelling.

At ClearSAP, we guide you through every step — from initial concept to final sign-off — ensuring smooth, compliant delivery. Our service includes all the support needed to secure a pass for each dwelling.