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Water ยท project

How To Create A Rain Garden

Measure, price, and prepare the materials for create a rain garden.

Rain garden receiving shallow runoff, overflow path visible
Illustrative project example

A rain garden is a drainage project: site suitability matters more than a simple material count.

Measure the project

Map roof or pavement drainage area and test infiltration using local guidance.

Estimate the main material
Rain garden inflow and overflowRoute shallow runoff into a planted basin with a safe overflow away from buildings.buildingplanted basinoverflow
Route shallow runoff into a planted basin with a safe overflow away from buildings.

Material checklist

  • Site-specific soil media
  • Plants suited to wet and dry cycles
  • Inlet and overflow materials

Check quantities, specifications, and delivery with your supplier. This list is a planning prompt, not a construction design.

Quantities to price

  • Contributing area: measure each roof or pavement surface draining to the site.
  • Garden size and depth: use local extension guidance and observed infiltration.
  • Soil and plants: price the specified media and species, not a generic fill volume.
Where the plan can change: Keep overflow away from foundations and neighboring property, and check utility locations before digging.

Work sequence

  1. Choose a safe location
  2. Size using local extension guidance
  3. Shape and plant
  4. Observe during storms

Further guidance

University of Maryland Extension: Rain garden fact sheet. Follow local requirements and product instructions for the actual installation.