In rendering a decision on an application as described
herein, the Commission shall consider, among other factors, the historic
and architectural value and significance of the landmark, the general
design, arrangement, texture and material of the features involved,
and the relation of such features to similar features in the surrounding
area. In the case of new construction or additions to existing structures
the Commission shall consider the appropriateness of the size and
shape of the landmark both in relation to the land area upon which
the landmark is situated and to other structures in the vicinity,
and the Commission may impose dimensional and setback requirements
in addition to those required by an applicable provision of a zoning
ordinance. A Commission shall not consider interior arrangements or
architectural features not subject to public view.