I don't know why you're wringing your hands over this.
B4-1.3-03, Special Appraisal Considerations for Modular, Prefabricated, Panelized, or Sectional Housing (04/01/2009)
Introduction
This topic contains information on special appraisal considerations for modular, prefabricated, panelized, or sectional housing, including:
Acceptable Modular Homes
Appraisal Requirements for Modular Homes
Acceptable Prefabricated, Panelized, or Sectional Housing
Appraisal Requirements for Prefabricated, Panelized, or Sectional Housing
Acceptable Modular Homes
Fannie Mae purchases loans secured by modular homes built in accordance with the Uniform Building Code administered by state agencies responsible for adopting and administering building code requirements for the state in which the modular home is installed.
Fannie Mae does not have minimum requirements for width, size, roof pitch, or any other specific construction detail for modular homes. Each such home must have sufficient square footage and room dimensions to be acceptable to typical purchasers in the subject market area.
Appraisal Requirements for Modular Homes
The appraiser must be familiar with the features that affect the quality of the home and must include this information in the appraisal if necessary to support his or her opinion of value.
The appraisal must address both the marketability and comparability of modular homes.
The appraiser must include the most appropriate comparable sales to support the opinion of value for the subject property.
The process of selecting comparable sales for factory-built housing is generally the same as that for selecting comparable sales for site-built housing. When the subject property is modular, prefabricated, panelized, or sectional housing, Fannie Mae does not require that one or more of the comparable sales be the same type of factory-built housing, although using comparable sales of similar types of homes generally enhances the reliability of the appraiser’s opinion of value.
Acceptable Prefabricated, Panelized, or Sectional Housing
Fannie Mae purchases loans secured by prefabricated, panelized, or sectional housing. These properties do not have to satisfy HUD’s Federal Manufactured Home Construction and Safety Standards or the Uniform Building Codes that are adopted and administered by the state in which the home is installed.
Fannie Mae does not have minimum requirements for width, size, roof pitch, or any other specific construction detail for prefabricated, panelized, or sectional housing. Each such home must have sufficient square footage and room dimensions to be acceptable to typical purchasers in the subject market area.
Appraisal Requirements for Prefabricated, Panelized, or Sectional Housing
The appraiser must be familiar with the features that affect the quality of the home and must include this information in the appraisal if necessary to support his or her opinion of value.
The appraisal must address both the marketability and comparability of prefabricated, panelized, or sectional homes.
The appraiser must include the most appropriate comparable sales to support the opinion of value for the subject property.
The process of selecting comparable sales for factory-built housing is generally the same as that for selecting comparable sales for site-built housing. When the subject property is modular, prefabricated, panelized, or sectional housing, Fannie Mae does not require that one or more of the comparable sales be the same type of factory-built housing, although using comparable sales of similar types of homes generally enhances the reliability of the appraiser’s opinion of value.