Question: How much does a green roof cost per unit m*m for a residential building?
Every green roof project is unique. The cost of a residential green roof depends on several variables, including:
1) Geographic location
2) Thickness of vegetation
4) Provider/installer (or green roof brand)
5) Size of the green roof installation
6) Eligible tax incentives
Certain countries, states and cities have economic incentives to encourage the installation of green roofs.
In the U.S., the green roof cost might range from $10 to $25 per square foot or $108 to $269 per square meter… (one square meter = approximately 10.76 square feet).
More sophisticated green roof (or green wall) installations can cost $25 to $100 per square foot, or $269 to $1075 per square meter. Of course, luxury setups can always cost more.
In New York City, the average green roof costs around $18 to $20 per square foot. New York City green roof installations can receive a tax credit of up to $4.50 per square foot. That amounts to approximately 25 percent of the costs typically associated with the materials, design and installation of a green roof.
Building owners in New York City who install green roofs on at least 50 percent of available rooftop space can apply for a one-year property tax abatement of up to $100,000. Originally a pilot program designed to expire in 2013, this incentive is currently slated to continue until March 2018.
In Germany, the average green roof cost is relatively low because the country has an economic incentives in place and an established green roof market.
Residential Green Roofs
Thanks to economies of scale, cost reductions are common. In a residential setting, however, there are two factors playing against your ability to attain lower prices:
- Residential green roof installations are more expensive per square foot/meter than commercial installations because the fixed costs of the installation cannot be spread over a greater area.
- The return on investment (ROI) associated with a residential green roof is harder to justify because savings won’t be on par with those in a commercial setting.
Hope this helps!