Sewer Connection Permits

The Sewer Connection Permitting staff assists businesses and home owners to connect their wastewater flows to the public sewer system. The mission of the Sewer Connection Permitting Program is to assist property owners within our service district to promptly connect to the NBC sewer system. The property owners are required to apply for a sewer connection permit before they make a service connection to a public sewer line. The NBC permit program ensures that the NBC collection system infrastructure is protected, and ensures that new connections are properly made to the public sewer system. The NBC permit program verifies that the sewer system has sufficient capacity available to accommodate the new flows and that the flows are of acceptable quantity and quality.

The applicant must ensure that their permit application package is complete and includes the completed NBC application form, building plans, site plans and the appropriate permit fee.  Once the completed application package is received by the NBC, the permit application can be processed and a permit can be issued.  The Permits Program strives to issue permits within 10 business days, with an average turnaround time of 2 business days.


Staff issue three different types of permits to contractors or property owners of residential or commercial properties located within the NBC service district.

    • Sanitary sewer connection permit  These permits are issued to all property owners and/or contractors that will be installing a service connection to the public sanitary sewer system.
    • Stormwater sewer connection permit  These permits are required for any property owner that has no other choice but to discharge stormwater from their project site to the NBC’s sewer system.
    • Sewer alteration permit  These permits are issued to contractors when a construction project involves the modification or exposure of any NBC owned structure, such as manhole covers or sewage pipes.

Additional Forms

Connection Permit Fees

The rates listed below are approved by the Public Utilities Commission (PUC) and cover the cost of program administration and field inspections performed by the NBC. 

These rates have been in effect since July 1, 2005.  Fees are applicable to all applications for a new service connection directly or indirectly to NBC facilities.  Fees are payable at the time of application by check or money order to the Narragansett Bay Commission.  To pay by credit card, please apply for permits online at

Residential Sewer Connection Permit Fees:

For property owners who are building or connecting a residential house to the public sewer system, the sewer connection fee is $260 per service connection.  All residential condominiums of six (6) units or less will be charged under residential tariffs.

Commercial/Industrial Sewer Connection Permit Fees: 

For property owners and developers connecting a commercial/industrial building to the public sewer system, the sewer connection fee is $779 per service connection.

Stormwater Permit Fees:

For property owners who cannot contain stormflow on site and wish to connect the stormflow from a commercial/industrial property to the combined public sewer system, the stormwater permit fee is $779 per connection.

Sewer Alteration Permit Fees:

There is no charge for an NBC Sewer Alteration Permit.

What if I do not obtain an NBC permit?

Failure to obtain the proper NBC permit may result in the imposition of fines, construction project shutdowns or delays, connecting improperly or to the wrong location or having to excavate the sewer connection to demonstrate a proper connection was made to the public sewer system.

The NBC Permit staff is available to assist applicants in completing and filing permit applications during normal business hours and will make every effort to work with an applicant to ensure that required plans, drawings, application and fees are submitted and a permit is issued in a timely manner.