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Why Add a Rain Garden

Why Add a Rain Garden or Bioswale to Your Commercial Property?

Turning part of your parking lot, roof runoff, or landscape into a rain garden or bioswale is more than just a “green” idea — it’s a smart way to manage stormwater, filter out pollutants, and enhance your property’s curb appeal. In the environmental and planning world, this falls under Low Impact Development (LID) or Green Infrastructure.

If you’re in the Sarasota County area and thinking of doing this for your business, here’s a practical guide — where to find help, how to plan it, and what steps to follow.

1. Funding & Support You Can Tap Into

Sarasota County actively promotes LID and has programs to help property owners offset costs and get technical support.

RainCheck / Stormwater Rebate Program

Note on business/commercial eligibility
The county’s materials often refer to “homeowners,” but the broader Stormwater Incentive Rebate Program appears to allow property owners (including commercial) to apply for BMP rebates. Sarasota County Government Before moving forward, check directly with the county whether your business site qualifies under the commercial rules (some restrictions or extra review may apply).

Technical & Design Guidance

  • Sarasota County has a Low Impact Development Guidance Document that offers design standards, details on combining practices in a “treatment train” approach, and rules that align with the county’s stormwater/land development regulations. Sarasota Water Atlas

  • For commercial sites, design is often more complex, and you’ll likely want to bring in a registered professional engineer or a qualified stormwater consultant to make sure everything delays, infiltrates, and filters water properly — and that your design meets county, state, and water management district standards.

2. How These Systems Work & Key Design Considerations

Here’s a simplified but realistic overview of how rain gardens and bioswales function, and what to watch out for.

Rain Gardens / Bioretention Areas

  • These are shallow, landscaped depressions that collect runoff from nearby impervious surfaces (roof, parking, sidewalks).

  • Ideal site: Where runoff naturally flows, but not too close to building foundations, utility lines, or areas with high water tables. Always call 811 to locate utilities before digging.

  • Depth: Typically 4–8 inches (depending on soil and design).

  • Sizing: Depends on how much impervious area you’re draining into it and how fast your soils infiltrate. In commercial contexts, you’ll need modeling or engineering.

  • Soil & media: Soil is often amended (e.g. sand, compost mix), sometimes with layers for filtration. Mulch is usually applied to the surface to reduce erosion and help with infiltration.

  • Plants: Use Florida-Friendly or native species that tolerate cycles of wet and dry conditions. That helps with pollutant uptake, erosion control, and habitat.

Bioswales / Vegetated Swales

  • Bioswales are elongated, vegetated channels built to slow down, filter, and infiltrate stormwater as it moves across the property.

  • They often follow the path of drainage ditches or conveyance routes, replacing or enhancing what might otherwise be concrete or grass swales.

  • Design elements might include a shallow flow channel (rock or wetland plants), side slopes, soil amendments, and underdrains (if infiltration is slow).

  • Regular maintenance is crucial — keep vegetation healthy, prevent erosion, remove debris, and ensure the water flows freely.

3. Recommended Workflow for Your Business Project

Here’s a high-level sequence you can follow (adjusted for commercial scale):

  1. Assess your site:

    • Map impervious surfaces and how water travels across your property

    • Evaluate soil infiltration rates, water table levels, and constraints (utilities, subslopes)

    • Check existing drainage patterns and whether there’s a logical place to collect runoff

  2. Engage a design professional:

    • Bring in an engineer or stormwater design expert who understands LID, county standards, and permitting

    • Use the county’s LID guidance document as a reference/benchmark Sarasota Water Atlas

  3. Apply for rebate / permit before starting work:

    • Submit your design, budget, and site plan to the County’s incentive program before constructing anything

    • Wait for the Notice to Proceed

    • If permits are required, follow the normal permitting route appropriate for commercial development

  4. Construct & document:

    • Build according to approved plans

    • Keep records: photos, material invoices, as-built drawings, grading reports, inspection logs

  5. Final inspection & rebate / approval:

    • The county will inspect the completed work

    • Submit documentation

    • Receive rebate (if eligible) and any approvals or certifications

  6. Maintain for the life of the project:

    • Routine inspections (e.g. every 12–18 months)

    • Remove weeds or clogging, replace mulch, repair any erosion or bank failures

    • Ensure inflow/outflow components remain functioning

4. Who to Call & What to Ask

For commercial projects, I strongly suggest you reach out to the Neighborhood Environmental Stewardship Team (NEST) in Sarasota County. They can help you navigate rebate eligibility, technical references, and the initial review. Sarasota County Government

Suggested contact steps:

  • Call 941-861-5000 (Sarasota County general line) and ask for the Stormwater / NEST / RainCheck program.

  • Email [email protected] for questions about the rebate or program requirements.

  • Ask these specific questions:
    • Does my commercial property qualify under the current rebate rules?
    • How much rebate is allowed for rain gardens, bioswales, or BMPs on commercial parcels?
    • What are the permitting requirements (county, water management district, environmental) I need to be aware of?
    • Are there local or program design checklists or templates I must use?

  • Industrial Stormwater Solutions: Stormwater @ Interstate Products

Disclaimer:
This information is provided to the best of our knowledge and is intended for general guidance. It should not replace consultation with Sarasota County, licensed professionals, or regulatory agencies. Always verify current program rules, rebate eligibility, permit requirements, and any updates before proceeding

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