Obtaining a Stormwater Permit
The Environmental Protection Agency has identified sedimentation from land disturbance activities and polluted runoff from land development and redevelopment as major sources of water pollution, impacting drinking water supplies, natural habitats, and recreational resources.
As of November 1st, 2023, all applications filed will be reviewed under the revised Bylaw and Regulations. The updated bylaw and regulations are available here, and a summary of changes can be found here Version Options Obtaining a Stormwater Permit Headline Version OptionsObtaining a Stormwater PermitHeadline. Changes from prior bylaws detailed below are underlined.
Any activity which will construct or fully reconstruct a new single-family home, OR disturb 3,000 square feet or more of land or involve the movement of 250 cubic yards or more of soil is required to provide stormwater management, and may require a Stormwater Permit, under the Natick Stormwater Management & Erosion Control Bylaw (Stormwater Bylaw). There are three types of approvals under the Stormwater Bylaw with different thresholds.
- Any newly developed (on previously undeveloped land) or fully reconstructed single-family home must provide stormwater management capable of holding a volume equal to 1 inch over all proposed impervious area (including but not limited to driveway, sheds, impervious patios, etc.).
- New or reconstructed single-family homes within the Aquifer Protection District must provide 120% of the storage volume required.
- Documentation including, but not limited to, engineered plan sheets, stormwater management calculations, and Operation and Maintenance Plans must be provided for review as part of the building permit application for the project.
- Any Land Disturbance, excluding new or reconstructed single-family home, greater than 3,000 square feet, but not exceeding 20,000 square feet. Land disturbance includes any activity that causes a change in the position or location of Soil or a change in the patterns of drainage and/or infiltration of water.
- The construction of a new Drainage Facility or alteration of an existing Drainage Facility greater than 3,000 square feet, but not exceeding 20,000 square feet.
- The addition, on-site redistribution, or export of greater than or equal to 250 cubic yards, but not exceeding 1000 cubic yards of Soil.
- Any project within the Minor Permit threshold within the Aquifer Protection District must provide 120% of the storage volume required.
- Any Land Disturbance, excluding new or reconstructed single-family home, greater than 20,000 square feet.
- The construction of a new Drainage Facility or alteration of an existing Drainage Facility greater than 20,000 square feet.
- The addition, on-Site redistribution, or export of more than 1000 cubic yards of Soil.
- Any project within the Major Permit threshold within the Aquifer Protection District must provide 120% of the storage volume required.
Stormwater Permit Process
Minor Stormwater Permits: $100 plus $0.05/SF of total work area - to be paid in OpenGov
Major Stormwater Permits: $250 plus $0.05/SF of total work area - to be paid in OpenGov
While reviewing applications, the Town will consider whether a project implements best practices in regards to handling stormwater. These stormwater standards or best practices are included in the MA Stormwater Handbook and Appendix A of the Natick Stormwater Regulations https://www.natickma.gov/documentcenter/view/10190/stormwater-management--erosion-control-bylaw---regulations-2020 . The following are some best practices to utilize:
- Environmentally sensitive site design
- Minimizing impervious surfaces (driveways) and capturing as much stormwater on-site naturally (such as through vegetation)
- Maintaining existing site topography and drainage patterns
- Retaining as much natural vegetation as possible
- Use of rain gardens, bioswales, rain barrels, green roofs, etc.
- Avoiding construction within the floodplain
- Utilizing appropriate erosion and sedimentation tools during construction
Click here Version OptionsObtaining a Stormwater PermitHeadline to learn more about what the Town is doing in regards to stormwater.