A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.
Intensive green roof cost.
They also estimated that annual maintenance costs of the two systems can range from 75 cents to 1 50 per square foot.
The epa estimates that the cost of installing a green roof starts at around 10 per square foot for simpler extensive roofing and 25 per square foot for intensive roofs.
An extensive green roof is the most common and least expensive type of green roof with costs ranging from 10 20 a square foot 2.
They are fairly lightweight and can be installed on roofs with a pitch from 0º to 30º.
They consist of a thin layer of soil with continuous coverage of growing material.
In its life however it was estimated the green roof would save over 200 000 in 2006 energy prices with two thirds of that coming from reduced energy needs.
In this project we got so much benefit out of this secret garden for the master suite along with all of these environmental benefits that the residents were excited to embrace.
15 to 50 per square foot.
For a conventional roof.
These figures will vary however and green roof installation companies will be able to give you a clearer figure based on your site s specifications.