Washington Manufactured/Mobile Home Installer License
The Manufactured/Mobile Home Installer License allows you to:
- Perform installation work covering all aspects of installing a home:
- Construction of the foundation system
- Installation of the support piers and earthquake resistant bracing system
- Required connection to foundation system and support piers
- Connections to the on-site water and sewer systems that are necessary for the normal operation of the home
- Application of the skirting
- Extension of the pressure relief valve for the water heater
How to get a Manufactured/Mobile Home Installer license in Washington?
- Fill out and submit a completed Application for Manufactured Home Installer Training and Certification, along with the corresponding fee
- Issue a check or money order addressed to the Department of Labor & Industries and mail it to their PO Box: Factory Assembled Structures PO Box 44420 Olympia WA 98504-4420
- Note that applications must be received before the cutoff date. If not, the application might be scheduled for the next available class
- Take the training course offered by the Department of Labor & Industries, which may be accessed online. Once completed, pass the 3-hour examination with a minimum score of 70%
- The applicant must wait for application approval to take the training and examination
- Once approved, expect the Installer Certification License to be issued by the department
For more information regarding the license requirements and examination details, please refer to the L&I website or contact The Board by phone at 1-800-705-1411 Option 3 or by email at
