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.
Wylam
Wylam is a village in the area of Northumberland. It is located about 10 miles (16 km) west of Newcastle upon Tyne. It is renowned for the being the native home of George Stephenson, among the early train pioneers. George Stephenson's Birthplace, his home, can be discovered on the north bank of the Tyne 3/4 mile (1.2 km) eastern of the village centre. It is possessed by the National Trust yet is closed to the public. Wylam has even more connections with the very early train leaders. The steam locomotive engineer Timothy Hackworth, that collaborated with Stephenson, was additionally birthed here. William Hedley that was birthed in the nearby town of Newburn went to the town college. He later went on to create as well as manufacture Blowing Billy in 1813, 2 years prior to George Stephenson produced his initial locomotive Blücher. Christopher Blackett as lord of the manor in the initial three decades of the 19th century supplied the business drive that motivated these engineers.