INNERSPACE 3D Planning Tool

Do I need planning permission?

The good news is that a loft conversion or loft extension for your home is classed as "Permitted Development" this means that in most cases you will NOT be permitted to submit an application for planning permission, provided the conversion falls within certain limits and considerations.

Our 3d Planning tool outlines the different types of limitations and considerations that your planning office will ask you to meet when having a loft conversion or loft extension.

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Designated Land

Designated Land includes National Parks and the Broads, Areat of Outstanding Natural Beauty, conservations areas and World Heritage Sites.

 

Roof extensions are NOT permitted development for houses on designated land so will therefore require a planning application.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Volume Limits

To be permitted development any additional roof space created must not exceed these volume allowances:

  • 40 cubic meters for terraced houses.
  • 50 Cubic meters for detached and semi-detached houses.

Please bear in mind that any previous roof space additions must be included within this volume allowance. Although you may not have created additional space a previous owner may have done also.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Fronting Highway

An extension beyond the plane of the existing roof slope of the principal elevation that fronts a highway is NOT permitted development and will therefore require planning permission

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Materials

Materials MUST be in similar appearance to the existing house.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Height Limit

No part of the extension is to be higher than the highest point of the existing roof.
(In the exception of a roof lift conversion)

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Balconies

Alterations to the roof of a house involving the creation of balconies are not permitted development and will require planning permission. A balcony is defined as a platform with a rail, ballustrade or parapet projecting outside an upper storey of a building.

 

A 'Juliet' balcony, where there is no platform and therefore no external access, would be permitted development. A raised platform is any platform with a height greater than 300mm and would include roof terraces.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Windows

Any side-facing windows must be obscure-glazed and non opening unless the parts that can be opened are more that 1.7 meters above the floor of the room in which it is installed.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Distances

Roff extensions, apart from Hipt to Gable ones are to be set back as far as possible, at least 20cm from the eaves.

 

The 20cm distance is measured from the roof line.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Protected Species

Work on a loft or roof may affect bats.

You need to consider protected species when planning work of this type. A survey may be needed, and if bats are using the building, a licence may be required.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1




Standard Conversion Types

Velux Conversion

  • This type of conversion is permitted development and does not require planning permission unless you are in a conservation area where planning is required for the Velux windows.
  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property.

For more information or if you would like to discuss your ideas and you would to arrange a free design visit then please call us free on: 0800 085 2134

House1

Dormer Loft Conversion

  • This type of conversion is under permitted development so does not require planning.
  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property.

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Hip To Gable Conversion

  • This type of conversion is under permitted development so does not require planning
  • Hip to gable loft conversions give much more space to a semi-detatched or detached home.
  • A hip to gable conversion means that the stairs leading up to the new conversion do not encroach onto the living space.
  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property
  • This type of conversion is under permitted development so does not require planning

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Roof Lift Conversion

  • This type of conversion is not under permitted development so will require a planning application which INNERSPACE will take care of for you.
  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Hip End Conversion

  • This type of conversion is under permitted development so does not require planning.
  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property.

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Mansard Conversion

Mansard conversions are generally front or rear facing, also with flat roofs, but featuring a sloping back wall incorporating windows in the form of small dormers.


  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property.

A mansard loft conversion is normally constructed where planning permission is required or if your property is in a conservation area.

 

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1

Cottage Dormer Conversion

  • This type of conversion can go from 1 bedroom to several bedrooms and a bathroom depending on the size of your property.
  • This type of conversion is under permitted development so does not require planning.

For more information or to arrange a free design visit please contact us or call free: 0800 085 2134

House1