You may need planning permission if you are planning a larger extension. All extensions will need building regulations approval. An architect can assist with this and if planning permission is required. A reputable contractor will also be able to advise you if this is needed as well.
Deal
Deal is definitely a town in Kent, England, UK. It sits on the English Channel eight miles north-east of Dover and also eight miles south of Ramsgate. It's a former fishing, mining and also garrison town. Strongly associated with Deal are the villages of Kingsdown, Sholden and Walmer, the second being exactly where Julius Caesar initially came to the UK (in line with the best guess by experts).