The Board of Trustees hereby finds that excessive similarity in the exterior design and appearance of residential buildings in the same residential neighborhood would adversely affect the desirability of the immediate area and neighboring areas for residence purposes, would discourage the most appropriate use of land throughout the Village, would impair the benefits of occupancy of existing residential property, impair the stability and value of both improved and unimproved property, produce degeneration of residential property, with attendant deterioration of conditions affecting the health, safety and morals of the inhabitants of the Village, and destroy a proper relationship between the taxable value of real property and the cost of municipal services provided therefor. It is the purpose of this article to prevent these and other harmful effects and thus to promote and protect the health, safety, morals and general welfare of the community.