See my article posted at
http://www.naifa.com
Search for January 2002 Appraisal E Gram
Search for October 2001 Appraisal E Gram
Scroll down to "what is that and now what do I do"
At the end are all sorts of links to Fannie Mae, HUD, VA, etc. Also check out the new Fannie Mae Guidelines that was issued last week.
A manufactured home is constructed to HUD building code and hopefully will have the tags attached to the exterior and a data plate inside somewhere. Occasionally all those get removed. So then you have to do research with owner for any documents the might have or with the local building department or assessment office to see if they have anything. Once you run down some information and still don't have the HUD label number (which every one wants to know about to verify it is a manufactured home), the serial number from ownership or assessment records can be cross referenced with the manufacturer or with HUD in WA. For FHA financing that is the lender's responsibility, (should be for conventional too) once they can verify that the home was constructed to HUD code it is still eligible for FHA financing.
A modular home is constructed completely or almost completely in a factory to a site built code like UBC, BOAC, CABO, etc. Then the sections are assemblec on site. Depending on the laws of the subject's location, it may or may not have a readily observable identification tag or label of any kind.
A panelized home or kit home or pre cut home would have all the materials to construct the home pre-cut, itemized etc with some assemblage in the factory and the majority if not all assemblage on the site. Those are not modular homes.
Both the modular and the "kit" style homes are considered comparable to site built by FHA, VA, Fannie Mae and would only require the verification to a site built code that you would typically use for a true stick by stick, cut, glued, pasted, nailed, home assembled on site.
Also the State Appraisal Boards for Alabama, North Carolina, South Carolina, Georgia and Texas have some excellent articles.
The Manufactured Housing Institute (link is at the end of my article) has lot of very usefull information. Wander around that web site.
But many, many, many times you CANNOT identify what type of building code was followed at original construction as manufactured homes, modular homes, kit type homes, site built homes all look alike some times and are constructed of the same materials with the same amenities, finish, etc. So research is essential!!!!!!!!!!!!!!!!!!!