cost of large conservatory
Conservatory Average Cost. The cost of a conservatory varies widely depending on the design, local labor and material costs, and other factors. Before you begin conservatory construction, check with the local planning department to find out what permits you may need.1  Conservatory costs start at around $7,500 to $15,000.2  The average cost of a conservatory is $10,000 to $30,000. 3  A conservatory could cost as much as $40,000 to $80,000 or more. Another Dimension: A conservatory not only technically increases the space of your home, but with its bright, open design will add roominess that exceeds its length, width, and height. 2  Value: Conservatories are a good value in terms of cost per square foot compared to other home additions.