Engineering Department

mill pond boardwalk

What does the Engineering Department do?

Engineering ensures compliance to the intent of the City standards and ordinances of any use or construction in the City right of way.  Engineering provides project management of various capital improvement projects including sewer improvement projects and the street paving program.  Design and supervision of construction of drainage, roadway, and sidewalk projects are provided by the department. Learn more about the Engineering Department.

2023 Paving Schedule

There are many factors that can affect our Paving Schedule and this list is subject to change without notice.  The City has hired engineering consultant Hayner-Swanson, Inc. and Stantec to assist the City with street selection for paving. Selection criteria includes, among other things, identifying roads that are in distress. In addition, coordination with Liberty Utilities and Pennichuck Water is also done to ensure that infrastructure associated with their capital projects are completed prior to the road being paved. Once a street is paved, there is a 5 year rule that prohibits cutting into a newly paved street unless there is an emergency situation.

Questions?  Please email us at:

Drainlayer License

Contractors must obtain a Drainlayer License to construct public or private sewers in the City.  Applicants must become familiar with Nashua Revised Ordinance Chapter 255, Sewage Disposal in order to be compliant with city regulations.  City Sewer and/or Plumbing Inspector must be called prior to beginning construction.

Please submit completed application to  The Board of Public Works reviews the applications at their monthly meeting.  Please allow up to six weeks processing time once completed application is received.

Questions?  Please email us at or call 603-589-3120.

Find a list of current approved City Drainlayers here: Current Approved City Drain Layers (PDF)

Engineering Permits

Completed permit applications may be delivered to the Engineering Department at 848 West Hollis Street or submitted via email to Please allow a minimum of three (3) business days for permit application review.