The Dictionary of Real Estate Appraisal, fourth edition, includes the following highest and best use definitions:
"• Highest and best use. The reasonably probable and legal use of vacant land or an improved property, which is physically possible, appropriately supported, financially feasible, and that results in the highest value.
The four criteria the highest and best use must meet are legal permissibility, physical possibility, financial feasibility, and maximum profitability.
Testing Highest and Best Use
To test alternative uses for the highest and best use, an appraiser usually applies the four criteria in the following order:
1. Legal Permissibility
2. Physical Possibility
3. Financial Feasibility
4. Maximum Productivity
In practice, the tests of physical possibility and legal permissibility can be applied in either order but they both MUST be applied before the tests of financial feasibility and maximum productivity. A use may be financially feasible, but this is irrelevant if is legally prohibited or physically impossible."
Page 334
"legally permissible uses would conform to the land's current zoning classification and local building codes along with any other relevant regulatory or contractual restrictions on land use."
Page 338
"In addition to analyzing zoning and private restrictions as part of the test of the legal permissibility of a land use, appraisers should also investigate other applicable codes and ordinances, such as building codes, historical district ordinances, and environmental regulations."