Infill Credit



The infill credit acts as an incentive for developing infill lots, as opposed to greenfields away from existing development. Infill development results in lower infrastructure costs, fewer miles driven, and a net reduction in impervious cover creation when compared with greenfield development.


Infill Credit: Summary
Goals Encourage infill development, over development in green fields.
Stormwater Management Objectives Water Quality/ Recharge Discount
Channel Protection,

Flood Control

Adjust hydrologic parameters, or do not require.

Example

An infill credit can be applied to all sites that are built within the current sewer envelope, and are smaller than 5 acres for residential development, and 2 acres for commercial or industrial uses. Sites that meet these criteria receive the following credits:

The definition of infill is critical to making this credit successful. A size limitation is necessary to prevent sites with a high potential impact from escaping stormwater requirements.

In TMDL watersheds, reducing water quality requirements may result in a violation of water quality standards. Furthermore, the credit needs to ensure that new development does not impact a relatively high quality reach within the subwatershed, or cause local flooding.

Modifications to the pre-development curve number condition are only apply in communities that require the assumption of a highly pervious land use, such as woods in good condition. The pre-developed curve number needs to be clearly defined to limit abuse of this credit.