A mobile home may be used as a comparable when the displacement dwelling is a mobile home, or when the displacement dwelling is not DSS. Mobile homes must not be used as a comparable for a conventional DSS dwelling without prior approval by TxDOT.

The cost of new construction, additions, and rehabilitation discussed in preceding Alternatives must be fully explained on form and supported by a written estimate from a contractor willing to perform the work. Cost of adding special energy conservation features, or for including such features in new or rehabilitated housing, shall not be considered an eligible expense unless required by law or necessary to make a dwelling comparable. The cost of built-in appliances, air conditioners, and extra interior attributes are not be considered eligible if these features are not in the displacement dwelling nor required by prevailing building codes.