The typical cost per square metre for constructing an extension or conservatory is around Â£1,500 to Â£2,000 on average; another reason why a garage conversion is one of the most popular options for many people.he typical cost per square metre for constructing an extension or conservatory is around Â£1,500 to Â£2,000 on average; another reason why a garage conversion is one of the most popular options for many people.
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Sponsored Topics. Madisonville is a city in Monroe County, Tennessee, United States. The population was 3,939 at the 2000 census. It is the county seat of Monroe County and the location of Hiwassee College. Madisonville is located at 35Â°31â²11â³N 84Â°21â²49â³W / 35.51972Â°N 84.36361Â°W / 35.51972; -84.36361 (35.520691, -84.362905).