To reduce and control storm water run off Seattle Public Utilities created the Rainwise program, which offers home owners in certain neighborhoods rebates for installing rain gardens & cisterns.  

We can make them edible rain gardens!  

For overview of entire process and paperwork–>CLICK HERE

  • To qualify, you must be redirecting 400 square feet or more of roof space, you must be within the qualifying neighborhoods, and you must have the new features installed by a trained contractor (Cascadia Edible Landscapes is one of them).  
  • Homeowners receive $3.50 per square foot of roof area directed to a Rain Garden system, and $2-3.39 (avg $2.50) per sq. foot  of roof area directed to Cisterns.
  • Rebates typically cover 50-100% of all project costs.
  • Homeowners need to pay for costs and receive reimbursement about 30 days after final paperwork is sent it.  In some cases where we have an ideal site, we have a Vendor Payment Option (VPO), where we put out the capital and labor, and home owner signs over the rebate to us.

If you are interested in working with us, please read below and then fill out our questionnaire.


INVESTIGATION PHASE 2015 rainwise map

PRELIMINARY ONLINE RESEARCH, FOLLOWED BY HIGH LEVEL OVERVIEW:  After researching your eligibility for Rainwise rebate and researching online your propertyA project manager will come to your property for a free 20-30 minute overview and investigate viability of the various project(s).  We have stringent codes and specifications to follow, and we can see if there are any “deal-breakers”.  If there are there will be no charges.  If you are interested in moving forward…

FOR RAIN GARDENS ONLY SOIL INFILTRATION TESTThere is a $20 charge to dig each two-foot deep hole for the test to be done. This can be done during the preliminary consultation,or, you can opt to do it yourself with our guidance. This information will tell us the viability of the Rain Garden, as well as influence the sizing (and cost) of the rain garden.

SIDE SEWER TESTING.  Cistern Projects do not require an infiltration test, but we HIGHLY RECOMMEND TESTING SIDE SEWERS IF WE ARE OVERFLOWING TO SIDE SEWER WITH A CISTERN OR A RAIN GARDEN.  We can schedule someone to scope them with a camera (you receive a little video) for $250, or you can schedule someone yourself.  You (the homeowner) assumes responsibility for the Side-Sewer below the ground.


Ballard Edible Rain Garden with Trellis
CEL Edible Rain Garden Plan -> Click to expaDESIGN PHASE  – DESIGN CONTRACT NEEDED

WE WILL PUT TOGETHER A DESIGN or 2 CONCEPTS and CREATE A PROJECT ESTIMATE(S):  This includes a plant list  to meet size and space requirements.   We will take some time with you to measure out the site, create a base plan, and then envision your new space and investigate the opportunities to reduce rainwater run off and to install cisterns and/or rain gardens.   Design rate is $85/hour and typical designs + plant lists take 4-12 hours to complete, put together estimate(s). If you want additional features in your landscape, the design costs will  increase proportional to the level of work you request.

We are a small business and are not able to provide free design. Because the rainwise rebate is based on the amount of roof captured, a home with a more straight-forward roof will be easier and quicker to calculate.   

PRE INSPECTION WITH SPU.  We then meet with an inspector from SPU to sign off on proposed project.  Home owner does not need to be present.

CONTRACT AND DEPOSIT: Meet with a CEL Project Manager to sign a work contract and pay a 50% deposit to cover capital outlay.  Scheduling project happens at this point.

INSTALLATION PHASE – Work Agreement needed

SUPPLY  ACQUISITION.  Ordering Cisterns is the largest bottleneck for us.

CEL and/or Sub contractors INSTALL Your Beautiful Rain Garden/ Installs cisterns.   NOTE.  Rain Gardens are huge pits at first and do not look pretty until all plants, woodchip, and rock material are in.  Projects range in duration between 1 day to 8 work days depending on scale and scope.

 POST INSPECTION WITH Seattle Public Utilities (SPU): CEL meets with SPU to review that the project was implemented to the required specifications.

INVOICE, REBATE APPLICATION:  We help you complete a rebate application form and get you all the paperwork ready to submit to the city.  At this point we have done our job and any balances are due to CEL.

REBATE MONEY:  CEL invoices you for the work performed;  SPU sends rebate check for $2-$3.39 (average $2.50)/square foot of roof area redirected to a cistern and $3.50 per square foot of roof area redirected to a Rain Garden.  City generally cuts that check within 30 days.

CELEBRATE: Host a dinner party to celebrate new (Edible) rain garden and invite all your neighbors.


Ready to get started, please fill out our questionnaire.

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A custom overflow solution to meet the SPU requirements. This drove up the cost compared to projects where we did not have to do this because the slope was more favorable.

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