Loft Conversions

Building Control Technical Guidance Leaflet No. 7

Loft Conversions

This leaflet is one of a series produced by the Hertfordshire Building Control Technical Forum


The aim of this leaflet is to provide you with guidance as to when you should submit an application under the Building Regulations for proposed works involving the conversion of the roof space of a dwelling. It is not intended to provide comprehensive details of the associated regulations but highlights the most important matters that you need to consider. Such works can be more complex than other extensions and we recommend that you seek professional assistance before submitting a Building Regulation application for us to check.

Is An Application Required?

Building Regulations permission is required for conversions that create any type of room in the roof space even where this is only for storage use. An application is not required where a small proportion of the space is boarded for light storage or access to water tanks as long as this is only served by a portable or retractable loft ladder.

To see more read the full PDF here