Findings. In exercising the above-mentioned powers, the Board of Adjustment may, in conformity with the provisions of this Chapter, reverse or affirm, wholly or in part, or may modify the order, requirement, decision or determination appealed from and may make such order, requirement, decision or determination appealed from and may make such order, requirement, decision or determination as sought to be made and to that end shall have all the powers of the officer from whom the appeal is taken. In considering all appeals to this Chapter, the Board of Adjustment shall, before making any finding in a specific case, first determine that the proposed change will not constitute a change in the Zoning District Map and will not impair an adequate supply of light and air to adjacent property or increase the congestion in public streets or increase the danger of fire or materially diminish or impair established property values within the surrounding area or in any other respect impair the public health, safety and welfare of the City of Weldon Spring. Every change granted or denied by the Board of Adjustment shall be accompanied by a written finding of fact based on sworn testimony and evidence specifying the reason for granting or denying the variance.