Modifying a Mobilehome or Manufactured Home: 
Alteration, Permit Requirements, and Inspections

Before beginning any work on your mobilehome, manufactured home, commercial modular, special purpose commercial modular or multifamily manufactured home you must submit an application for a permit (form HCD 415).

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.

Approved Plans

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 .

These plans and specifications have been preapproved by the Department. They 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.

Fees

Fees will be charged for these preliminary plan check meetings as a technical service fee ($196.00 per hour, $196.00 minimum).

Forms

Mobilehome Assistance Center (Complaint Forms)

Permits & Inspections

If any of the following changes have been performed without a valid permit and those changes meet the permit requirements on form HCD MH 604, 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.

Information Bulletins

Check Information Bulletins frequently for additional information pertaining to modifying a manufactured home/mobilehome.