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 Gigha
Colonsay is an island in the Inner Hebrides of Scotland, located north of Islay and south of Mull. The ancestral home of Clan Macfie and the Colonsay branch of Clan MacNeil, it is in the council location of Argyll and also Bute and has an area of 4,074 hectares (15.7 sq mi). Aligned on a south-west to north-east axis, it gauges 8 miles (13 km) in size and also reaches 3 miles (4.8 km) at its best factor. The island's population was 124 as recorded by the 2011 census a rise of nearly 15% since 2001 when there were 108 usual residents.