Contractor Resources

RainWise is a rebate program that helps eligible property owners manage stormwater by installing cisterns and/or rain gardens on private property. Contractors must go through our Orientation and be licensed. See Contractor Licensing Requirements for more information.

Please email rainwise@seattle.gov with any questions. 

Become a RainWise Contractor: Orientation

We provide training for contractors and landscape professionals to learn the requirements to install cisterns and/or rain gardens on private property in specific Seattle neighborhoods through RainWise, a City of Seattle and King County rebate program.

This training is a required prerequisite for all who wish to qualify to perform RainWise installations.

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  Existing RainWise Contractors – Sign up for RainWise Events here!    Sign Up!

Become a RainWise Contractor: Next Steps

After completing your RainWise Contractor training, refer to these documents to become a RainWise contractor:

RainWise Project Paperwork Forms

Before the Project Starts

Before construction begins on a RainWise project, contractors are responsible for the completion of these forms.

Project Completed: Rebate Paperwork

Here are the forms that need to be completed by the property owner and contractor to receive final rebate payment.

For efficiency/ease, here is a consolidated packet of forms that contractors will need to complete with the customer.

Financial Support Options

For contractors:

For property owners:

  • RainWise Access Grant: Provides up to an additional $1000 for RainWise eligible homeowners and non-profit community organizations (including religious groups) for income limited and underserved communities

Marketing, Design and Maintenance Materials & Resources


Design Specifications:

Guides for Plant Selection:

Use these plant suggestions and plans to simplify your design process and share options with customers.


Teach your customers how to maintain their cistern and rain gardens. Use our maintenance guide or “how-to” videos. These are all available in English, Spanish and Vietnamese.

Contractor Skill-Building Webinars

These webinars are for current and prospective RainWise contractors and are held virtually using the Zoom Webinar platform. Recording are located on YouTube.

“Building a RainWise Rain Garden”

Watch the recording to learn the basics of Building a RainWise Rain Garden with Kat with a K Landscaping. You will learn the basics of preliminary planning and design, excavation best practices, and how to complete the installation for a rain garden. BONUS: How to connect a cistern to a rain garden!

“Getting Your RainWise Business Online”

Watch this recording of the Contractor Skill-Building Webinar to learn strategies to getting your RainWise business online. Join RainWise outreach team members to go through useful platforms such as LinkedIn, Facebook Business, Yelp, Houzz, and more!

“Design Challenges – How do you make it work?”

Watch this webinar with RainWise contractor Roseann Barnhill of Dirt Corps to learn more about the challenges when installing a RainWise project. Also, you will learn how to complete an initial site design for a RainWise project.

“Cistern Installation Basics – Dry fit and Pipe Gluing”

Watch this webinar where you will join Jake Harris of Stone Soup Gardens to learn about the basics of installing a cistern system. At this webinar, you will learn how to dry-fit a cistern installation, pipe-gluing techniques, and more!

Contractor Newsletter

The RainWise Program emails and mails its Contractor News and Tips Newsletter to RainWise contractors. The purpose of this newsletter is to provide contractors with important program updates and events. If you are a RainWise contractor and you are not receiving the newsletter by mail or email, please contact us at rainwise@seattle.gov to let us know. Please also let us know if you change your address. We want to make sure we are mailing the newsletter to the right place!

Visit this page for the contractor newsletter archive.

Additional Information