Green Roof Square Foot Cost

Average new roof cost.

Green roof square foot cost.

With most professional licensed insured roofing contractors the installation cost is usually about 60 of the total cost. First gallon cost is the capital cost to install enough of a stormwater bmp to treat 1 gallon of runoff and it s how we often discuss the cost of stormwater management tools. The installed cost premium for multi course extensive green roofs ranges from 10 30 to 12 50 per square foot more compared to a conventional black roof. The installation assumes a single story house such as ranch cape or colonial with a hip and gable combination roof.

The average cost of a new roof is between 4 707 and 10 460 depending on the roof size and materials used. They estimate that extensive green roof systems cost about 10 per square foot and intensive systems cost around 25 per square foot. Thus a 3 tab composition shingle roof will cost an average of 350 to 450 per square to install. Costs for green roofs can range from 15 per square foot on up depending on many factors such as growing medium depth and green roof size.

They are not normally installed on residential roofs due to the weight. Gsa s green roof report estimated that green roofs on commercial and public buildings provide a payback based on 50 year average annual savings of about 6 2 years nationally internal rate of return of 5 2 and an roi of 224 based on a net present value of 2 7 square foot. Primary green roof costs are related to installation and maintenance. They are not normally installed on residential roofs due to the weight.

Typically expect to spend 25 to 30 more to install a green roof than to install a traditional roof. Asphalt roof costs from 3 600 to 10 800 on average while a metal roof costs between 8 000 to 24 000. The installed cost premium for semi intensive green roofs ranges from 16 20 to 19 70 per square foot more compared to a conventional black roof. Usually green roof setups cost at least 30 per square foot while elaborate setups may cost as much as 200 per square foot.

Based on these considerations recover green roofs has found that extensive roofs can cost about 10 to 50 per square foot while intensive roofs can cost from 20 to 200 per square foot. The green roof portion costs between 25 35 a square foot 2 with the solar panels costing an additional 18 000 20 000.