§ III-A
Establishment of districts
The Town of Portsmouth is hereby divided into the following zoning districts:
| RESIDENTIAL DISTRICTS |
| R-10 |
| R-20 |
| R-30 |
| R-40 |
| R-60 |
| COMMERCIAL DISTRICTS |
| C-1 |
| INDUSTRIAL DISTRICTS |
| I-L (Light) |
| I-H (Heavy) |
| WATERFRONT DISTRICTS |
| WD |
| OPEN SPACE AND PUBLIC LANDS DISTRICT |
| OS |
| WATER RESOURCE PROTECTION DISTRICT |
| WRPD |
| REDEVELOPMENT DISTRICT |
| RD |