There are many different types of extension. For example, you could install an orangery, flat or pitched roof extension, over-structure extension, single or double storey extension or a glass box extension. Which one of these is most suitable will depend on your existing property.
Haltwhistle
Haltwhistle is a town and also civil parish in Northumberland, England, 10 miles (16 kilometres) eastern of Brampton, near Hadrian's Wall. It had a population of 3,811 at the 2011 Census. Stone-built houses are a feature of Haltwhistle. It is just one of 2 settlements in Great Britain which declare to be the exact geographic centre of the island, in addition to Dunsop Bridge in Lancashire, 71 miles (114 km) to the south. An electoral ward with the very same name still exists. This ward stretches from Hexham southern up the R. South Tyne as well as has a total population taken at the 2011 Census of 4,832. Haltwhistle was a market community for the exchange of local items. In the 18th century 2 Quakers established a baize manufactury and also there was a weaving establishment. On the Haltwhistle Burn were fulling mills, dyeing and rotating mills. A stroll along this stream to the Roman Wall, shows that it should have been a hive of market with quarries, coal mining as well as lime burning kilns. The Directory of 1822 (Pigot) offers a whole series of craftsmen, storekeepers as well as traders-- 60 in number, consisting of manufacturers of blockages. The weekly market was hung on Thursdays and there were fairs on 14 May and 22 November for cattle and sheep.