We believe in big trees!

Typical Configuration


StormTree designs and provides tree pit systems for the urban landscape with the twin goals of promoting healthy and vigorous tree growth, while maintaining pavement support (“suspended pavement“) without the need for proprietary subsurface structural support systems.


Our open design tree pit systems are designed to provide unrestricted root growth and promote a healthy growth environment for street trees and are suitable for green streetscapes including sidewalks and plazas.

Our tree pit systems can be designed and installed with the tree at surface grade, or with the tree recessed several inches below grade, as a “tree well”, with the ability to intercept and collect additional surface water, providing supplemental irrigation. Another advantage of recessing a tree slightly below a sidewalk surface, prevention of the potential for the lifting or upheaval of the sidewalk, since root development and spread takes place at a lower depth.

We provide systems in several configurations and multiple dimensions. Some features include,

  • systems can be installed with underdrain pipes to prevent potential water logging;

  • systems can be integrated with trench and other surface drains;

  • systems can be connected to underground storage chambers for high flow volume control, storage, or harvesting;

  • any standard tree grates can be used;

  • systems can be standalone or interconnected in a series with communal underdrain and conveyance piping

  • reduced installation costs since underground structural support cells and the manual labor involved for installation is not required.

Starting at $3,400 delivered.

Our standard sidewalk tree pit systems start at $3,400 and include a 4 foot by 4 foot precast concrete frame, ADA compliant fiberglass tree grate, support hardware, and sufficient soil profile to support the healthy and vigorous growth of your selected tree.

Whether you are in the concept mode; drawings on a napkin; or well into your design charette, contact us today for more details, plan-ready drawings and specifications. We are ready to provide all the design support you need—no charge of course.


StormTree designs two types of tree “systems”: (1) “tree filters” which are designed and sized to meet regulatory compliance for nutrient (pollutant) removal as a stormwater management system, while providing healthy tree growth; (2) “tree pits” that are not intended to meet regulatory standards; are designed primarily to support healthy, vigorous tree growth in a heavily impervious environment.

Our systems do not require structural cells or separate external infrastructure support systems to support pavement or prevent soil compaction.

No. Our systems do not require, and we do not recommend the use of structural soils in close proximity to our systems. Our recommended soil blends and “recipes” are based on readily obtainable soil, organics, and aggregates.

Absolutely not! StormTree systems are not closed “boxes”. The unique open sided and open bottom design allows for unrestricted tree root development and healthier tree growth. As we like to say, “we don’t box the tree, we frame the tree”.

Our tree pit systems for heavily impervious environments can be installed with any typical street tree the landscape architect, urban forester, or other specifier chooses.

For our tree filter systems for regulatory stormwater management (see “tree filters” under the “Systems” tab), we maintain a list of trees suitable for various regions throughout the U.S. and Canada. Recommended trees typically attain a height of less than 30 feet. We will also consider suggested alternate species.

Based on StormTree’s open design, correct installation and proper care and maintenance practices, the tree will probably outlive you.

As designed, the planting depth of the trees in a StormTree system is several inches below the sidewalk surface and are directed further downward and outward. The soil media used is highly porous and oxygen rich, discouraging roots from seeking porous base soils just below sidewalks

Possibly. If systems are to serve primarily as tree pits for healthy and vigorous growth, and subsurface soils are known to infiltrate naturally preventing waterlogging, then underdrain pipes may not be necessary.

Yes, provided it meets the specific criteria for your project, and is recognized to support healthy tree growth based on industry standards.

We provide complete and comprehensive construction details and operation and maintenance guidelines, as well as virtual response and support as requested.

Typically, we use ADA (American Disability Act) compliant fiberglass grating, however, any manufactured metal or plastic tree grates are suitable.

Yes, provided that it meets the definition of a “tree grate” and is customarily used as such.

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U.S. Patent Nos.


Other patents pending



24 Corliss Street, Suite 9092

Providence, RI 02940