The Neighbour consultation scheme does not apply to loft conversions and there has been now additional size allowance that has been granted.
Permitted development also allows you to utilise and extend your loft space within the guidelines mentioned on the planning portal found here without the need for planning permission.
Unfortunately, properties in a conservation area cannot carry out a loft conversion under permitted development. This is stated on the planning portal permitted development guidelines ‘Roo extensions are not to be permitted development in designated areas**’
A terraced house loft can be extended up to 40m3 (cubic meters) and a semi-detached and detached house loft can be extended up to 50m3.
*Article 4 directions – Restricting Permitted Development in Conservation and Heritage Areas
An article 4 direction is an additional layer of protection to the character of a building. It is advised that the homeowner contacts the local authority to determine whether their property has any planning restrictions that may impact their permitted development rights. An article 4 direction can cover one or multiple of the below.
Extensions
Outside alterations such as new windows or door re-roofing or alterations to chimneys, ridge tiles etc.
Porches
Covering gardens in concrete or tarmac
Taking down garden walls or fences to make car parking spaces
Putting up gates, fences or walls
Covering the walls by rendering or painting the brickwork.
**Designated areas include national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.
Useful Chart
Terraced Semi-detached Detached
Rear Extension 3 Meters 3 Meters 4 Meters
Loft Conversion 40m3 40m3 50m3
Rear Extension – NCs6 Meters6 Meters8 Meters
Key –
NCS = Neighbour consultation Scheme
M3 = Meters Cubed
