The Town Board hereby finds that excessive uniformity, dissimilarity, inappropriateness or poor quality of design in the exterior appearance of buildings or other structures erected or altered can adversely affect the desirability of the immediate and neighboring areas and, by so doing, impair the benefits of occupancy of existing property in such areas, impair the stability in value of both improved and unimproved real property in such areas, prevent the most appropriate development and use of such areas, produce degeneration of property in such areas with attendant deterioration of conditions affecting the health, safety, comfort and general welfare of the inhabitants thereof and contribute to the diminution of the taxable value of real property in such areas and their ability to support municipal services provided therefor. It is the purpose of this Article to prevent these and other potentially harmful effects resulting from such unattractive exterior appearance of buildings and other structures erected or altered and thus to promote the public health, safety and welfare, to conserve the value of buildings, to encourage the most appropriate use of land and to improve the physical and visual appearance of the Town.