RainWise Contractor Resources RainWise is a rebate program that helps eligible property owners in managing stormwater by installing cisterns and/or rain gardens on private property. Contractors must complete the RainWise Orientation Course and maintain proper licensing. This page offers a single location for the most current resources and information for RainWise contractors. Email Us Being a RainWise Contractor Access the RainWise Orientation Course, onboarding materials, and key policies to become a RainWise contractor. Stay up to date on program news, events, and updates. Become a RainWise Contractor Start Here “Become a RainWise Contractor” course update coming in January 2026. Email rainwise@seattle.gov to be notified when the course relaunches. Required Onboarding Contractor Onboarding Form RainWise Participation Criteria (PDF) Licensing Information Seattle Business License Washington State Business License Register as a Contractor – Washington State L&I Form W-9 (PDF) Contractor Events & Newsletter Sign Up for Events Upcoming Outreach Events: Attend an outreach event to meet potential RainWise customers Contractor Newsletter Current Contractor Newsletter: Rebate increase, online calculator, and upcoming events Newsletter Archive RainWise Program & Policies Program Requirements RainWise Participation Criteria (PDF) Program Policies RainWise Complaint Policy (PDF) Additional Program Information RainWise Basin Map (PDF) RainWise Projects All the tools and documents you’ll need to plan, design, and complete RainWise installations, from site inspections and planting plans to the rebate paperwork and required forms. Planning & Design Design Requirements & Guides Contractor Reference Packet (PDF) How to Request Inspections (PDF) RainWise Design Specifications (PDF) Feasibility Inspection Guide (PDF) Installing a Pump to a Cistern (PDF) Side Sewer Guidance (PDF) Planting & Materials RainWise Planting Plan (PDF) Vendors for RainWise Supplies (PDF) Before you Start: Project Paperwork Required Pre-Construction Forms Customer Understanding Form (PDF) Infiltration Test and Certification (PDF) Sample Site Plan (PDF) Web-based Rebate Calculator Project Complete: Rebate Paperwork Rebate Paperwork Rebate Paperwork Overview (PDF) Rebate Paperwork Checklist (PDF) Property Owner Rebate Form (PDF) Property Owner Agreement (PDF) VPO/W-9 (PDF) Warranty Forms Rain Garden Warranty Form (PDF) Cistern Warranty Form (PDF) System Performance Forms Rain Garden Function Form (PDF) Cistern Function Form (PDF) Rockery Release Form (PDF) Infiltration Test and Certification (PDF) Consolidated Documents Rebate Paperwork Packet – Customer Forms (PDF) Additional Required Items Pre-inspection report Post-inspection report Final site plan Invoice Submit Paperwork Send completed documents to rainwise@seattle.gov (preferred) or mail to: SPU: RainWise, 700 5th Avenue, Suite 4900, P.O. Box 34018, Seattle, WA 98124-4018 Resources for Contractors and their Customers Outreach, education, and maintenance tools you can share with homeowners. Includes marketing materials, language-accessible resources, funding opportunities, and maintenance guides. Financial Support Financial Assistance Vendor Payment Option (VPO) Form (PDF) RainWise Access Grant GSI Mini-Grant (non-RainWise) Marketing Materials RainWise FAQs English (PDF) RainWise One Pager (PDFs) English, Spanish, Vietnamese, Traditional Chinese, Somali, Tigrayan Cistern Fact Sheet (PDFs) English, Cambodian, Traditional Chinese Outreach Materials Door hanger (coming soon) Contractor logos (coming soon) Maintenance Resources Maintenance Information RainWise Maintenance Page Brochure: Sightline Institute: Using Cistern Water for Edibles (PDF) Maintenance Guides (PDFs) English, Spanish, Vietnamese, Traditional Chinese, Somali, Tigrayan General Learning & Other Resources Build your knowledge and stay informed. Explore professional development, GSI standards, Seattle stormwater codes, and helpful guides for expanding your business. Contractor Skill-Building Professional Development The Contractor Skill-Building page supports contractors in improving their skills, capacity, and success with RainWise projects. Visit the Skill-Building Page Other GSI Resources GSI Standards & Codes Seattle Stormwater Code Rain Garden Handbook Seattle ROW Improvements Manual Seattle Standard Specifications and Plans Seattle Side Sewer Permit Requirements Seattle Director’s Rules Seattle Land Use Code Additional GSI Resources 12000 Rain Gardens – Resources General Business Resources Launch Your RainWise Business Web Series: Launch Your RainWise Business Start Your RainWise Business: Step-by-Step (PDF) RainWise Business Readiness Evaluation (XLSX) Licensing Information Seattle Business License Washington State Business License Register as a Contractor – Washington State L&I Form W-9 (PDF) Questions? Email rainwise@seattle.gov
