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.
East Cowes
East Cowes is a community as well as civil parish to the north of the Isle of Wight, on the eastern financial institution of the River Medina beside its neighbour on the west financial institution, Cowes. Both communities are attached by the Cowes Floating Bridge, a chain ferryboat operated by the Isle of Wight Council. East Cowes is the site of Norris Castle, as well as Osborne House, the former summer home of Queen Victoria as well as Prince Albert. The Prince had a significant impact on the style of the location, as an example on the building of St Mildred's Church in close-by Whippingham, which features unique turrets mimicing those located on a German castle.