What is the purpose of this permit?
To allow a business to perform alterations to Factory Assembled Structures for: Commercial Coaches, Factory Built Temporary Worker Housing Structures, Manufactured / Mobile Homes, Recreational Park Trailers, Recreational Vehicles, and Vendor / Medical Units
Who issues this permit?
Department of Labor and Industries
What activities require this permit?
Alterations to Factory Assembled Structures for: Commercial Coaches, Factory Built Temporary Worker Housing Structures, Manufactured / Mobile Homes, Recreational Park Trailers, Recreational Vehicles, and Vendor / Medical Units
How much will this permit cost?
Fees vary, depending on the type of work performed. A fee schedule is available on the
L&I web site.
Where can I get the application for this permit?
The application is called '
Manufactured/Mobile Home Permit Application' is online and can be accessed at
https://lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/manufactured-home-permits-inspections/.
Do I need to include anything with my application?
Payment needs to be included with the permit application. Two sets of plans must be submitted with the application, if plan review is required.
Is the decision on my permit dependent on anything besides the information in my application?
Decision on permits may be dependent on the accuracy of plans submitted when plan review is required.
How long will it take to review my application?
Allow 2-3 days for a response to alteration applications for Manufactured/Mobile Homes.
All other alteration applications, allow 3-4 weeks for a response. Accuracy and completeness speeds up the processing time.
Where do I submit my application?
Applications may be submitted online, by mail or in-person at a L&I office.
How long is my permit valid?
Permit is valid for one year.
Permit Timeliness Results
Permit Timeliness data collection is in response to a State Auditor’s Performance Audit and RCW 43.42A. Each regulatory agency developed a plan to improve permit clarity, predictability, and timeliness. Each agency considers the customers experience to ensure permit assistance is simple to use, easy to access, and designed in a customer-friendly manner. Agencies report progress to the Governor’s Office for Regulatory Innovation and Assistance (ORIA). ORIA prepares and distributes reports, with participation from the State Auditor’s Office and Results Washington. See latest report here: https://www.oria.wa.gov/ORIA-2020-PermitTimelinessProgressReport.pdf.
All permits submitted for reporting were entered into this Regulatory Handbook. Here are the results of the performance data:
Estimated Time Required By the Agency to Process a Permit Application (Definition)Average number of days from Receipt to Complete: 1Maximum number of days from Receipt to Complete: 1Estimated Time Required By the Agency to Issue a Permit Decision (Definition)Average number of days from Complete Application to Decision: 1Maximum number of days from Complete Application to Decision: 1(Summary results based on 12698 submittals in 2023)
Where can I get permitting assistance?
Web page URL:
https://lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/manufactured-home-permits-inspections/Helpdesk phone:
Contact Local OfficeSubject matter expert phone: Factory Assembled Structures: 800-705-1411, Option 3
Subject matter expert email:
fas1@lni.wa.gov