(a) In reviewing an application, a commission shall:
(1) use the guidelines adopted under § 8–301 of this subtitle; and
(2) consider:
(i) the historic, archaeological, or architectural significance of the site or structure and its relationship to the historic, archaeological, or architectural significance of the surrounding area;
(ii) the relationship of the exterior architectural features of the structure to the remainder of the structure and to the surrounding area;
(iii) the general compatibility of exterior design, scale, proportion, arrangement, texture, and materials proposed to be used; and
(iv) any other factors, including aesthetics, that the commission considers pertinent.
(b) A commission shall consider only the exterior features of a structure.