There is a significant difference between green roof prices. The current costs in British Columbia, Canada for a standard extensive green roof varies from $130/m2-$165/m2 ($12/ft2-$15/ft2). The cost of a standard intensive green roof starts around $540/m2 ($50/ft2)
[4]. Installation price depends on many factors such as labor and equipment costs. This study considers a uniform distribution that varies from $165/m2 to $540/m2 for intensive green roofs, while for extensive and C&D waste based extensive green roofs vary between
$130/m2 and $165/m2.