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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Not to be confused with Wilson, Texas. Wilson County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 42,918. Its county seat is Floresville. The county is named after James Charles Wilson. Wilson County is part of the San Antonio-New Braunfels, TX Metropolitan Statistical Area.