City Codes
National Codes Enforced
*NEW* - Effective September 15, 2019, the State of New Hampshire Building Code will follow the 2015 set of the iCodes, as mandatory minimum codes - therefore these new editions supersede the locally adopted earlier editions.
The City of Portsmouth have adopted the following construction codes (click here to purchase). The City of Portsmouth amendments are available on this page in PDF format or at the Inspections department.
| YEAR | NATIONAL CODE | CITY CODE AMENDMENT |
| 2009 | International Building Code | City Building Amendment |
| 2009 | International Residential Code | City Residential Amendment Swimming Pool, Spas & Hot Tubs Regulations |
| 2009 | International Fire Code | City Fire Amendment |
| 2009 | International Plumbing Code | City Plumbing Amendment |
| 2009 | International Mechanical Code | City Mechanical Amendment |
| 2006 | International Energy Conservation Code | |
| 2009 | National Fuel Gas Code (NFPA 54) | |
| 2017 | National Electric Code (NFPA 70) | City Electrical Amendment |
| 2009nt | Life Safety Code (NFPA 101) |
Copies of the Portsmouth Amendments are available at the Building Inspection Department, 3rd floor, Portsmouth City Hall.