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Stormwater Permits
Stormwater Management Permits
Construction activities of any kind that disturb greater than one (1) acre (43,560 square feet) or are part of a common plan of development or sale that will disturb greater than one (1) acre must have an approved stormwater management permit or a waiver of the requirement for a stormwater management permit from the Northampton Department of Public Works.
The requirements and procedures for stormwater management permits are defined by:
Permit Forms
- Stormwater Management Permit Application (pdf)
- Stormwater Permit Exemption Application (pdf)
- Stormwater Operation, Maintenance and Inspection Agreement (pdf)
- Stormwater Facility Maintenance Schedule Template (doc)
Permit Fees
Project Type | Permit Review and Inspection Fee |
Residential Site (1 unit and 1-5 Acres Disturbed) | $700 |
Residential Site (1 unit and greater than 5 Acres Disturbed) | $1,100 |
Minor Residential Subdivision (1 lot and disturbing 1 to 5 acres of land) | $700 or $1 per linear foot of roadway or common driveway (whichever is greater) |
Residential Subdivision (2 or more units in a common plan of development) | $2,000 or $2 per linear foot of roadway or common driveway (whichever is greater) |
Other Residential such as condominiums, townhouse or retirement development (2 or more units in a common plan of development) | $700 per acre disturbed (maximum of $5,000) |
Commercial Subdivision | $2,000 or $2 per linear foot of roadway or common driveway (whichever is greater) |
Commercial or Industrial Site | $700 per acre disturbed (maximum of $5,000) |
Land Disturbance Only (No change in site use, buildings and impervious surface area). May include reconstruction of parking lots, roads, and driveways; utility work; and lawn and landscaping work.) | $100 per acre disturbed |
Permit Archive
Stormwater Management Permits Resources and Guidance
- Massachusetts DEP Stormwater Standards and Handbook
- EPA Stormwater BMP Pollutant Removal Tools and Information
- Methods to Calculate Phosphorus and Nitrogen Load Reductions for Structural Stormwater Best Management Practices (EPA MS4 Permit Appendix F Attachment 3)
- NOAA Atlas 14 Rainfall Data
- Massachusetts Erosion and Sediment Control Guidelines for Urban and Suburban Areas