Ind. Code § 36-7-11-16

Sec. 16. Except as provided in section 20 of this chapter, the construction of a new building or structure, and the moving, reconstruction, alteration, major maintenance, or repair involving a color change conspicuously affecting the external appearance of any nonhistoric building, structure, or appurtenance within the primary area must be generally of a design, form, proportion, mass, configuration, building material, texture, color, and location on a lot compatible with other buildings in the historic district, particularly with buildings designated as historic, and with squares and places to which it is visually related.