The Planning Board may approve any application referred to it upon finding that the building or structure for which they requested the permit, if erected or altered in accordance with the submitted plan, would be in harmony with the purpose of this Chapter, would not be visually offensive or inappropriate because of poor quality of exterior design, would not have monotonous similarity or striking visual discord in relation to the sites or surroundings, would not mar the appearance of the area, would not impair the use, enjoyment and desirability and reduce the values of properties in the area, would not be detrimental to the character of the neighborhood, would not prevent the most appropriate development and use of the site or of adjacent lands and would not adversely affect the functioning economic stability, prosperity, health, safety and general welfare of the entire community.