This guide explains planning permission rules affecting two storey extension developments in Darlington.
Most householder development follows national permitted development rules unless local restrictions apply.
with the impact of works carried out. Larger single storey rear extensions are subject to a
Permitted development rights allow householders to improve and extend their homes
the interests of their neighbours and the wider environment. The Ministry of Housing,
We get a lot of enquiries asking whether or not planning permission is required to replace a conservatory roof from glass/plastic to tiled, our advice is to Submit a Lawful Development Certificate as the re-roofing could result in the roof design being changed.
wall of the extension to the point where the external wall would meet (if projected upwards)
The Council now have a new Conservation officer. To ensure that their work is co ordinated and their expertise is best used, we will no longer be offering free Heritage advice. Formal Listed Building applications will continue to be free of charge.
Last verified 2026-01
UK permitted development legislation allows many two storey extension projects without planning permission provided certain limits are followed.
However local planning authorities such as those covering Darlington may impose additional planning controls through conservation area policies or Article 4 directions.
Many two storey extension projects in Darlington may fall under permitted development rights if they remain within national planning limits.
with the impact of works carried out. Larger single storey rear extensions are subject to a
the interests of their neighbours and the wider environment. The Ministry of Housing,
Yes. Additional planning restrictions may apply in conservation areas or where Article 4 directions remove permitted development rights.
Planning applications for two storey extension projects in Darlington are handled by the local planning authority covering Darlington, County Durham.
For official planning advice consult the council planning portal for your area or visit the UK Planning Portal.
This guide summarises planning rules affecting two storey extension developments in Darlington.
Planning regulations may change and additional local planning policies may apply. Always confirm planning requirements with your local planning authority before starting development.
Last updated March 2026