To perform any work on your mobilehome, manufactured home, commercial modular, special purpose commercial modular or multifamily manufactured home, you must submit an application for permit (form HCD MH 415) (PDF).

Note: Alteration permit applications can be submitted 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:

• Northern Area Office at NAOstaff@hcd.ca.gov
• Southern Area Office at SAOstaff@hcd.ca.gov

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 C&S Online Services.

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. 

The Department must review and approve plans and specifications for the alteration or conversion of manufactured homes, multifamily manufactured homes, commercial modulars, and special purpose commercial modulars.  Department employees perform on-site inspections of alterations and conversions to the structural, fire safety, plumbing, mechanical, and electrical systems of regulated units.

To review all requirements for submission of the listed forms or plans and their associated fees please review the appropriate section of the Mobilehome Parks and Installations regulations or Special Occupancy Parks regulations. 

Preapproved HCD plans and specifications are currently under revision by the Department and will be returned to this website shortly. Once updated, these preapproved plans and specifications are valid for the purpose of obtaining a construction permit when the design loads and allowable soil conditions specified in the plans are consistent with the requirements for the locality. Any alteration to a plan without Department approval will render the plan invalid.

While the plans and specifications are being updated, please contact the appropriate Area Office at (800) 952-8356 or NAOstaff@hcd.ca.gov (Northern Area Office) or SAOstaff@hcd.ca.gov (Southern Area Office) with any questions.

• Permit to Construct Application — HCD MP 50 English (PDF) / Spanish (PDF)

This form can be submitted to the Department via email to: 

• Northern Area Office at NAOstaff@hcd.ca.gov
• Southern Area Office at SAOstaff@hcd.ca.gov

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 C&S Online Services.

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. 

• Earthquake Resistant Bracing System (ERBS) installation application — HCD MP 50 ERBS (PDF)
• Alternate Approval Application — HCD MP 511 (PDF)
• Standard Plan Approval Application — HCD MP 520 (PDF)
• Plot Plan — HCD 538 (PDF)
• Flood Plain Ordinance Compliance Certification for Manufactured Home Installations — HCD 547 (PDF)
• Manufactured Housing Permit Application — HCD MH 415 (PDF)

Please note:  Alteration permit applications can be submitted 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:

• Northern Area Office at NAOstaff@hcd.ca.gov
• Southern Area Office at SAOstaff@hcd.ca.gov

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 C&S Online Services. 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. 

• Application for Replacement Insignia — HCD MH 416
  • English (PDF) / Spanish (PDF)
• Insignia Placement — HCD MH 425
  • English (PDF) / Spanish (PDF)
• Notice of MH, CM Installation on a Foundation System — HCD 433A (PDF)
• Notice to Assessor — HCD 433B (PDF)
• Notice of MH Conversion Fixture Improvements to Real Property — HCD MH 433C (PDF)
• Request for Insignia by QAA — HCD MH 440 (PDF)
• Manufactured Home Electrical Load Worksheet — HCD MH 527
  • English (PDF) / Spanish (PDF)
• Manufactured Homes Alterations and Permit Guidelines — HCD MH 604
  • English (PDF) / Spanish (PDF)
• How to Submit a Complaint

Fees 

Fees will be charged for these preliminary plan check meetings as a technical service fee ($238 per hour, $238 minimum). 

Permits & Inspections

If any of the following changes have been performed without a valid permit, you are encouraged to obtain a permit prior to the Department's inspection in order to avoid possible penalties:

Installation, construction, or alteration of:

1. Any mobilehome, building, structure, or accessory building;
2. Any electrical, mechanical, or plumbing equipment;
3. Any fuel gas equipment;
4. Any fire protection equipment within the unit.