Not all work will require planning permission. Check on the interactive guide on the Planning Portal to see what does and doesn't need planning permission. If your property is a listed building you must also apply for listed building consent. Planning permission may also be needed if your property lies within a Conservation area.
If you need to apply for planning permission and require some advice find out how much it costs and how to access it - pre-application advice and charges.
If you don't need planning permission you may still need building regulations approval. Find out if building regulations apply.
You need to apply for planning permission through the Planning Portal.
You can apply for a certificate which is a legally binding document that protects all parties and can be relied upon when conducting property searches. . There are 2 types of certificates: