What is the License Exceptions to Building Permit Requirements?

License Required Work

Electricians, plumbers and gas fitters must display their valid Masters license at the time of the permit application. 

Electrical Permit Exceptions

1.         Permit for ‘like-kind’ replacement of fixtures not required.

2.         Electrical wiring, devices, appliances, apparatus or equipment operating at less than 25 volts and not capable of supplying more than 50 watts of energy do not require a permit.

3.         NH Licensed Electricians may extend or modify an existing circuit without a permit.  *This exemption does not extend to homeowners doing their own wiring.

Plumbing Permit Exceptions:

1.         Pemits not required for ‘like-kind’ replacement of sinks, faucets, water closets, fixtures, devices or equipment.

2.         A permit is not required for repair or relocation of less than ten feet of domestic water supply, waste or vent by a NH Licensed Plumber.  *This exemption does not extend to homeowners doing their own plumbing.

Mechanical Permit Exceptions:

1.         Does not require permits for ‘like-kind’ replacement of fixtures, devices or equipment.

2.        Permit  not required for self-contained refrigeration/heat pump systems containing 10 pounds (4.54 kg) or less of refrigerant or that are actuated by motors of 1 horsepower (746 W) or less where all work is done by licensed professionals.


**A permit is not required for the stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap, drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new material, such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code.**