To do it yourself or not? When you can and can’t do your own plumbing.
According to state law, a plumbing license is required to install plumbing, with few exceptions. So before you get out your wrench, be sure to review the list below to determine if it is legally permissible for you to install your own plumbing. Homeowners may install plumbing without a license only under the following circumstances:
- The plumbing is located inside your home.
- The project to be completed is within a single-family residence.
- The home is the owner’s primary residence. A primary residence is defined as the address which the owner designates as his or her permanent residence for the purpose of voting or the address where the owner receives his or her state or federal tax mailings. (NOT a cabin, summer home, rental property or business.)
- The owner occupies the residence. (This means that under no circumstances may a homeowner without a plumbing license install plumbing related to new construction.)
- The plumbing is in a farm building on property owned and occupied by the owner. (EXCEPT where a license may be required by local ordinance.)
To view related state laws in their entirety, click here.

