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Industrialized Building Systems (Modular) and Mobile Structures

The Code Enforcement Section is responsible for the administration and enforcement of the Industrialized Building Systems (Modular)/Mobile Structures certification program. For the rules that govern the administration and enforcement of the Industrialized Building System (Modular)/Mobile Structures program, use the Special Administrative Rules for Industrialized Building System and Mobile Structures (675 IAC 15-1), which are adopted by the Fire Prevention and Building Safety Commission.

The certification program includes the review and release of plans for each system under which an Industrialized Building System (Modular) and Mobile Structures are to be built, as well as in-plant inspection being performed. A system is based upon the units completed width and number of stories. A certification label is required for each unit comprising a completed structure.

The in-plant inspections are conducted by either personnel from the Code Enforcement Section or by an authorized third party inspection company. Each unit must be inspected at one point during construction to be eligible to receive a certification label. Each certification label has a unique serial number and is placed upon the electric service panel to identify the unit as certified for use in Indiana. The Indiana certification label is a die cut sticker in the shape of the state in blue for mobile structures and gold for industrialized building systems (modular).

For information on the application process, visit the Industrialized Building System or Mobile Structure Application page.

  • Seal Identification

    Seal Identification

    Each type of home has its own specific code, and the codes must be applied accordingly. Supervision of the work undertaken to site or install any of these units is the responsibility of the local building official, with the possible exception of manufactured homes sited within a mobile home park (which is controlled by the Department of Health). Any questions or concerns of the local building official in regards to construction of any of these units should be voiced to the Code Enforcement Section.

    Modular Seal

    Modular residential units are reviewed, constructed and inspected to the Indiana One- and Two-Family Dwelling Code. Modular commercial units are reviewed, constructed and inspected to the Indiana Building Code. Units constructed to either code will have Indiana Modular seals (gold). These seals can be found inside the cover of the electrical service panel and typically inside a closet on units not containing an electrical panel. When ordering seals, a "P" seal means a Modular seal.

    Mobile Seal

    The Indiana Mobile Structures Code is applicable to single mobile commercial and residential add-on structures up to and including 16-foot-wide units. Commercial mobile units that consist of more than one unit are structurally compliant to the Indiana Mobile Structures Code, while use requirements are dictated by the Indiana Building Code. The Indiana Mobile seals (blue) will be located inside the electrical service panel cover, with one for each section of a structure. When ordering seals, an "M" seal means a Mobile seal.

    Manufactured Home Seal

    HUD Manufactured Home Construction and Safety Standards are applicable to HUD-manufactured homes and are specifically for manufactured homes (mobile homes). The HUD-manufactured home seals (red) are located at the rear of each section of the home, mounted on the siding approximately 12 inches above the chassis and 12 inches inward from the rear of the home.

  • Frequently Asked Questions (FAQs)

    Industrialized Building System (Modular)/Mobile Structures FAQs

    Q: What is an industrialized building system?
    A: IC 22-12-1-14: "Industrialized building system" means any part of a building or other structure that is in whole or in substantial part fabricated in an off-site manufacturing facility for installation or assembly at the building site as part of a Class 1 structure, a Class 2 structure, or another building or structures. However, the term does not include a mobile structure or a system that is capable of inspection at the building site.

    Q: What is a mobile structure?
    A: IC 22-12-1-17: (a) Mobile structure means any part of a fabricated unit that is designed to be: (1) towed on its own chassis: and (2) connected to Utilities for year-round occupancy or use as a Class 1 structure, a Class 2 structure, or another structure.

    Q: What is a modular structure?
    A: Modular structure means an industrialized building system other than a mobile structure intended to be placed upon a permanent foundation. (675 IAC 15-1)

    Q: What is a permanent foundation?
    A: Permanent foundation means any structural system capable of transposing lads from a structure to the earth at a depth below the established frost line without exceeding the safe bearing capacity of the supporting soil.

  • Fee Schedule

    Industrialized Building Fee Schedule

    Effective May 16, 2002
    Fees Required (675 IAC 15-1-22)

    (a) The design release fees for manufacture shall be as follows:

    (1) System plan review:

    (A) filing fee $30
    (B) residential, add-a-room or duplex $320 (Footnote 1)
    (C) commercial $505 (Footnote 2)

    (2) System plan review (late filing):

    (A) filing fee $55
    (B) residential, add-a-room or duplex $525
    (C) commercial $552

    (3) Addenda:

    (A) filing fee $30
    (B) residential, add-a-room or duplex $85 (Footnote 1)
    (C) commercial $105 (Footnote 2)

    (4) Addenda (late filing):

    (A) filing fee $55
    (B) residential, add-a-room or duplex $140
    (C) commercial $165

    1. Includes only the original floor plan. A fifty-dollar ($50) fee is charged for each additional floor plan. Crawl space or basement plans are considered to be floor plans.
    2. Includes not more than two (2) module units as a completed structure. A fifty-dollar ($50) fee is charged for each additional module unit.

    (b) The system prototype inspection fees (without a design release) shall be as follows:

    (1) First module unit $70
    (2) Second module unit $85
    (3) Third module unit and each additional module unit thereafter $105

    For the purposes of this subsection, "module unit" means a structure, or other entity, regarded as an
    elementary structural or functional constituent of a whole industrialized building system or mobile

    (c) The third party inspection authorization fees shall be as follows:

    (1) Original application for Indiana third party inspection authorization (if the original application for
    authorization is not granted, three hundred dollars ($300) of the fee will be refunded) $830

    (2) Yearly third party inspection renewal $550

    (d) Indiana seal of acceptance fees shall be as follows:

    (1) All applications for the Indiana seal of acceptance shall be accompanied by the proper fee which
    includes in-state inspection and monitoring.
    (2) Indiana seal of acceptance $65 per seal

    (e) Fees for travel shall be as follows:

    (1) In-state or out-of-state reinspection $45 per hour
    (2) Out-of-state inspection or $45 per hour
    plus the actual expense  incurred for the purpose of inspection or monitoring
    (3) Mileage for out-of-state $0.40 per mile
    inspection/reinspection or monitoring from base station to inspection site and return
    (675 IAC 15-1-22; EFF May 16, 2002)