After a public hearing held pursuant to the provisions of §
285-49 of this article, the Board of Appeals shall have the power to hear and decide appeals from and to review any order, requirement, decision or determination made by the Building Inspector, subject to the provisions of §
267 of the Town Law, and, in passing upon appeals, shall have the power, where there are practical difficulties or unnecessary hardships in the way of carrying out the strict letter of this chapter, to vary or modify the application of any provisions of this chapter so that the spirit of this chapter shall be observed, public safety and welfare secured and substantial justice done. No variance in the strict application of any provision of this chapter shall be granted by the Board of Appeals unless it finds:
(a) That there are special circumstances or conditions, fully described in the findings of the Board, applying to the land or building for which the variance is sought, which circumstances or conditions are unique to such land or building and do not apply generally to land or buildings in the neighborhood and have not resulted from any act of the appellant or applicant subsequent to the adoption of this chapter, whether in violation of the provisions hereof or not.
(b) That for reasons fully set forth in the findings of the Board, the aforesaid circumstances or conditions are such that the strict application of the provisions of this chapter would deprive the appellant or applicant of the reasonable use of such land or building and the granting of the variance is necessary for the reasonable use of the land or building and that the variance which is granted by the Board is the minimum variance that will accomplish this purpose.
(c) That the granting of the variance will be in harmony with the general purpose and intent of this chapter and will not be injurious to the neighborhood or otherwise detrimental to the public welfare.
(d) Where the Zoning Board of Appeals grants a use variance for a use permitted in another district, the area standards shall be that of the district in which the use is permitted.