Drainage & WaterproofingKeep Water Where It Belongs.
Grading, drainage and waterproofing that solve water problems at the source.
We find the cause and fix it properly.
- French drains & subsurface drainage
- Foundation & basement waterproofing
- Downspout & runoff management
Drainage & Waterproofing Work
Illustrative images of the work this service covers.



What we do
Grading, drainage, foundation waterproofing, French drains and basement water issues — solved at the source.
Why Green Island: We treat water problems as construction problems — finding the cause and fixing it properly.
What's included
- Grading and surface drainage
- French drains and subsurface drainage
- Foundation waterproofing
- Basement waterproofing and water issues
- Downspout and runoff management
- Coordination with foundation repair and interior finishing
How we approach the work
- Conversation and site visit — we learn the property, the goals and the constraints.
- Clear scope — what is included, what still needs to be decided and what information we need.
- Scheduled, coordinated work — one team managing the phases in the right order.
- Walk-through and follow-up — we finish what we start and stand behind it.
See our project portfolio
Browse photographs of Green Island's own work across all four service categories.
View all projectsWhat clients say about Green Island
"Reliable, knowledgeable and friendly service. Did a great job and would not hesitate to hire them again for future projects."
Related services
Sitework & Property ServicesServing Cape Cod, Martha's Vineyard, Nantucket & the South Shore of Massachusetts
Proudly based in Edgartown, Massachusetts.
Discuss Your Drainage Project
Prompt Follow-Up. Clear Scope. Transparent Next Steps.
Complex projects may require site plans, engineering, septic information and design selections before responsible pricing can be established.