Not here in tornado alley. Footings below the frost line, anchor and tie-downs AND a permanent perimeter foundation of block or brick are necessary for a manufactured home to be classed as real estate, otherwise they are classed by State Division of Property Assessment as personal property, not real estate. Most of the rural Assessors have the ones on foundations on a "Cost" value as a "special residential" class which is a percentage of the average single family house that the Cost Model is built on for each county. Shelby, Davidson, Rutherford, Williamson, Knox, Sumner, Montgomery and Hamilton Counties all have their own classifications because they are not on the State CAMA system, but I think they have to comply with county code enforcement. Most lenders won't loan on a manufactured home unless it is classed as real estate.