Recreational Vehicle (RV)
Recreational Vehicle (RV)

Understanding different types of modular/off-site construction and transportable structures may be confusing but having a better idea of these classifications helps you manage assets. On the far end of the spectrum, we have recreational vehicles and park model recreational vehicles. In general, recreational vehicles are mobile, where park model recreational vehicles are made for camping or seasonal use. Recreational vehicles may be motorized or towed by other vehicles, and many types of builds and styles apply. (Both recreational vehicles and park models are made for camping or seasonal use)

Recreational vehicles and park model recreational vehicles are subject to different standards. The NFPA 1192 standard is used for recreational vehicles, where park model recreational vehicles use ANSI A119.5. They also require manufacturing facility certification, as do some of the other categories of modular off-site constructions used for more permanent types of housing.


Manufactured Home Structures

A separate category of manufactured home structures falls under the governance of the Housing and Urban Development agency or HUD.

Manufactured Home structures or off-site construction units are transported in one or more sections on a permanent chassis and may be used as a dwelling with or without a permanent foundation. They may be subject to zoning considerations, depending on local ordinance.

Manufactured Home structures are subject to plan approval and inspections, along with licensing of the designated manufacturing facility.


Modular Industrialized Homes


Modular 2 story - home guide
Modular 2-Story – Photo Courtesy of HomeGuide

There are three categories of modular homes that also present discrete options to builders.

One, the modular industrialized home is assessed according to the International Residential Code or IRC. These types of structures are constructed off-site and may also include accessory structures to the dwelling units themselves. Many states have established programs that include plan approval and in-plant inspection requirements for these types of homes, along with specialized zoning compliance.

Second, modular commercial industrialized units are governed by the International Building Code or IBC and make up multifamily dwelling structures and other commercial occupancy groups. Many states have established programs that include plan approval and in-plant inspection requirements for these types of buildings as well.

Last, the third category of panelized buildings has applications for both the International Residential Code (IRC) and the International Building Code (IBC). These types of modular constructions are also built off-site, with licensing of the manufacturing facility and other rules according to state and/or local requirements.


At ICC NTA, we help companies understand the different types of off-site constructed units they may use while building and maintaining properties. Along with a track record of excellence in consulting on fire safety protocols and more. ICC NTA remains a valuable partner in the off-site construction industry; let us help you to understand all of what’s involved in evaluating a building for safety and assist with assuring you and other stakeholders all ducks are a row at all times.

About ICC NTA, LLC: As an accredited third-party agency and part of the International Code Council (ICC) family of solutions, NTA provides code evaluation, product certification, inspection, engineering, plan review, and testing services, as well as independent quality and standards compliance verification for building product manufacturers. With offices, testing labs, and training facilities in both Nappanee, Indiana, and Bryan, Texas, NTA serves residential and commercial builders, code officials, manufacturers, and suppliers throughout the building industry.