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.
Riding Mill
Riding Mill is a town near Hexham in Northumberland, England. It belongs to the civil church of Broomhaugh and also Riding. It is served by Riding Mill railway station and by a regular bus solution on the path from Hexham to Newcastle. Riding Mill is remarkable as the place of Riding Mill pumping station. Up until here the water launched from Kielder Water makes use of the River Tyne yet at Riding Mill it is pumped to parts of Tyne and also Wear and over the hills to Teesside. Leaving the town towards Hexham, Hollin Hill Terrace is located on the left. Very little info is offered on these 8 homes but they are a fine example of Victorian architecture. This balcony was disappointed on maps of the area prior to 1850, yet appear on a map dated in between 1850/1894. During 2008 the town was called one of the most costly location to live outside London.