This page will guide you through four simple steps: map your roof in Google Maps, calculate how much rainwater lands on it, share photos of your property, and complete a short survey so we can design a rainwater system that manages water safely.
You don’t need perfect measurements or photos — we’ll refine everything with you during your consultation.
Your roof is a reservoir. These four steps show how to measure it and plan where the water can go.
Even if you’ve never used Google Maps this way before, this quick roof check will give us a solid first estimate for your rainwater plan. You don’t need perfect accuracy — a simple outline of your main roof area is enough, and we’ll refine the details with you later.
Open Google Maps to start measuring your roof →
If you get stuck at any point, just do your best and move on — your answers are meant to be quick approximations, not a final survey.
Use these screenshots to measure your roof area in Google Maps before you use the calculator.
Enter your roof area and local rainfall to see how much rain lands on your roof each year.
Use the Product Water Rainfall Calculator below and enter:
If you’re in the Seattle region, you can use:
The calculator will show the total gallons of rainfall your roof receives each year.
This step is simply about understanding your available rainfall — not designing a system yet. Most homeowners are surprised at how much water their roof already collects, especially during the months when outdoor watering matters most.
Next, complete the short planning survey and upload a few photos so we can explore practical storage options for your property.
This short survey pulls together your roof rainfall, photos, and goals so we can come prepared to your consultation.
After completing the main questions in the survey, you can click through and skip the last three pages that appear after you press the Start button.
