Since 2006, GRASS has led the way to a greener and healthier region. As designers and installers of vegetative roofing systems, GRASS was instrumental in collaborating with the Philadelphia Water Department in forwarding Philadelphia’s stormwater management regulations and legislation. We have become one of the region's leading green roof contractors and have installed more than half a million square feet of green roofs, storm-water systems, and urban roof-top landscapes.


Working with GRASS early on in the development process is the most efficient and cost-effective way to incorporate vegetative roofing systems into your projects. Our sister company, Onion Flats Construction has been recognized internationally as an industry leader in green building techniques and possesses an intimate understanding of the coordination necessary to successfully incorporate these systems in the overall building detailing process which benefits our clients early in their development cycle.

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