A Stormwater Management Permit is required for any work that fits the criteria below:
Any activity subject to Site Plan Review (Chapter 282-6).
Any activity that will result in the disturbance of 10,000 square feet or more of soil, or more than 50% of the parcel or lot, whichever is less.
Any residential development or redevelopment of five or more acres of land proposed pursuant to the "Subdivision Control Law" (M.G.L. c. 41, sections 81K to 81GG inclusive) or proposed under a special permit process pursuant to M.G.L. c. 40A, section 9.
Any activity that will increase the amount of impervious surfaces more than 50% of the area of a parcel or lot, and;
Any activity that will disturb land with 15% or greater slope and where the land disturbance is greater than or equal to 5,000 square feet within the sloped area.
Any activity that will alter, fill or degrade a wetland, body of water, floodplain or isolated depression subject to flooding.
Note, if you are filing a Notice of Intent pursuant to the Wetlands Protection Act or Wetlands Protection Bylaw, and you meet one or more of the criteria above, you will need to submit a Stormwater Management Permit in addition to the Notice of Intent.
Stormwater Management Permit Fees
Basic Residential Application
Application for Residential Subdivision or Multifamily Development