It depends on the size and type of extension. Small porches or flat roof extensions are very reasonably priced. More substantial two storey extensions can be expensive. In general, the price is roughly proportional to the amount of space you add to your home.
Orkney
Orkney is an island chain in the Northern Isles of Scotland. It is set 10 miles north of the coast of Caithness and includes 70 islands, of which 20 have settlements. The island chain has a total area of 523 square miles, meaning that it is the sixth largest Scottish island and the tenth largest island in the UK. Kirkwall is Orkney's most extensive administrative centre. Orkney makes up one of the 32 council areas of Scotland, alongside being a constituency of the Scottish Parliament, a lieutenancy area and an one-time county. The local council is Orkney Islands Council, being one out of 3 councils in Scotland that have a majority of elected members who are independents. The majority of the islands are divided into 2 groups, the North and South Isles, and a feature of all the islands is the existence of Old Red Sandstone. With a moderate climate and greatly fertile soil, agriculture remains to be the most significant part of the economy. Exportation of beef, cheese, whisky, beer and fish additionally continues to have a part in the economy, however there has been an increase in areas such as retail, making up 17 percent of overall employment. Increasing in notability are the wind and marine energy sources, and the island produces in excess of its yearly electricity requirement through these methods. According to the 2011 census, Orkney has a population of 20100, growing 11 percent from the 2001 census. A range of festivals occur on the islands which draw in great deals of locals and citizens, for example the Orkney International Science Festival and the St. Magnus International Arts Festival occurring each year in June. For all your home upgrades, make certain to make use of respected specialists in Orkney to make certain of quality.