0797 44 63 142 info@XLlofts.co.uk



Do you need planning permission for a loft conversion? 

A loft conversion for your house is considered to be permitted development, and usually does not require an application for planning permission, unless subject to the following limits and conditions:

  • 40 cubic metres, additional roof space for terraced houses
  • 50 cubic metres, additional roof space for detached and semi-detached houses
  • No extension beyond the height  of the existing ridgeline  
  • Materials to be similar in appearance to the existing house
  • Any verandas, balconies or raised platforms will need planning permission.
  • Juliet balconies do not need planning permission
  • Side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor
  • Roof extensions not to be permitted development in designated areas i.e. conservation, world heritage sites.
  • Note : any previous roof space extensions must be included within the volume allowances of 40 and 50 cubic meters.


How long does a loft conversion take? 

Usually a Velux conversion will take around 4-6 weeks depending on size , but a more complex conversion can take up to 8 weeks 

Does a loft conversion add value? 

A loft conversion can add up to 20% on the value of a property depending on size and location of the property

What are the different types of loft conversions?

The different types of loft conversions are:

  • Velux
  • Dormer
  • Traditional cut roof dormer
  • Hip to Gable
  • Truss Roof 

How do I know if I have enough headroom for a loft conversion?
You will need between 7 – 8 feet (210cm – 240cm) headroom before conversion.

My loft is a modern trussed roof design – can it still be converted?
Yes, a large percentage of our jobs are trussed roofs.

Where does the staircase go?
Our first option is to go above the existing staircase, alternatively: through a landing cupboard or borrowing space from an existing bedroom.

Do I need planning permission?
This is dependent on the type of conversion and your neighbouring area. We deal with all planning and building regulations so you don’t need to worry.

What do I do now?
Contact us on our office number 01332 881 859 or anytime 0797 44 63 142 for a chat or to arrange a home visit.