For information on necessary permits for modifying a mobilehome, manufactured home, or commercial modular, visit the Modifying a Mobilehome page.
HCD MH 415 - Manufactured Housing Permit Application (PDF)
Applications for some types of mobilehome and manufactured home alteration permits can be completed using Codes and Standards Online Services (C&S OS). Please login or create an account.
Form HCD MH 415 can be submitted to the Department by mail to the appropriate HCD Area Office or via email to:
Exception: HCD does not accept large format plans via email. These plans must be submitted by mail or in person.
When submitted to HCD, the completed application must be accompanied by the appropriate fees. Payment must be in the form of a check or money order payable to the Department of Housing and Community Development. Payments can also be submitted through the Department’s online fee-payment system. Please note: you must have a DTN and a zip code to make a payment online. This information can be obtained by contacting the appropriate Area Office at (800) 952-8356 or NAOstaff@hcd.ca.gov or SAOstaff@hcd.ca.gov.