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.
Isle Of Coll
Coll is an island situated west of the Isle of Mull in the Inner Hebrides of Scotland. Coll is known for its sandy coastlines, which rise to form huge sand dunes, for its corncrakes, and for Breacachadh Castle. It remains in the council area of Argyll and Bute. Coll has to do with 13 miles (20 km) long by 3 miles (5 kilometres) large and has a population of around 150. Coll's sandy beaches rise to create big sand dunes. The highest point on Coll is Ben Hogh in the mid west of the island, a ridge with two tops running NW/SE, which increases initially to an elevation of 104 metres (341 feet) with a triangulation column, and to 106 metres (348 ft) 450 metres (492 yd) to the southeast. In the 2011 census, the island's population was recorded as 195, standing for an increase over the previous decade of nearly 19%.