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We are often asked "what is the difference in a permanent modular building versus temporary?".  Well, there are many different factors that come into play.  If you want your modular building to be permanent, you should consider installing it on a foundation similar to the one in the photo above.  Some folks even pour concrete on the floor, which will give you a nice crawl space under your modular building.  The downside to installing this type of foundation, besides the cost of the foundation, is we'll need to use a crane to install your modular units onto the foundation.  Other, less expensive, foundation types are available and can be "less permanent". 

Another factor in the temporary versus permanent debate is the roof.  Most temporary modular buildings have a roof system which is nearly flat.  They appear flat to the naked eye, but they do have a slight pitch to allow for water run off.  Permanent modular buildings often have a hinged roof system, like in the photos above, or sometimes have a roof constructed on site.

You may hear people talk about "true modular" construction.  You see, many modular buildings are built on steel frames, with axles and wheels, and are transported to the site.  Then the wheels and axles are typically removed, however, the steel frame is installed with the modular unit.  Conversely, a "true modular", is built upon a temporary steel frame.  The unit is transported to the site and then removed from the frame with a crane, and then set on the foundation.  The end product with "true modular" construction is very similar to typical "stick built" construction.  In fact, most folks would not be able to tell the difference.