The alteration or moving of existing structures in historic districts or landmark protection areas; or the alteration or moving of designated historic sites or landmarks; or the construction of new structures within historic districts or landmark protection areas, shall comply with the following provisions:
A. Alterations to an existing designated historic structure or landmark shall properly preserve the historical and architectural characteristics which make it unique, and any changes or additions shall conform to the intrinsic and unique character of other building or the structure itself. The applicant should refer to the Secretary of the Interior's Standards for Rehabilitation and be aware of the current tax incentives when rehabilitation work is contemplated.
B. New construction within an historic district shall require no specific architectural style; however, the following criteria shall be considered in determining whether the proposed design of a new structure incompatible with the collective characteristics of the structures located within the historic district or landmark protection area:
The following criteria shall be considered:
1. Height. Alterations to a designated historic structure may be no higher than the tallest comparable feature of the existing structure.
2. Setback. Alterations to a designated historic structure must remain the original front setback of the existing structure or the prevailing setback existing within its historic district or landmark protection area, providing that such a setback is compatible with the historic character of the existing structure.
3. Proportion. Alterations to the designated historic structure shall reflect the proportions of the existing structure.
4. Roof Types. Alterations to a designated historic structure shall have roofs compatible in configuration, mass and materials to that of the style of the existing structure.
5. Surface texture of alterations to a designated historic structure shall be appropriate to the historical style of the existing structure and the period in which it was constructed.
6. Site utilization shall be appropriate to the historical period in which the existing structure was built.
7. Projections and recessions such as porches, steps, awnings, overhangs, entrances, windows, etc., shall be appropriate to the style of the existing structure and the historical period in which it was built.
8. Architectural details such as cornices, lintels, arches, grill word, shutters, window and door trim, canales, etc., shall be appropriate to the historical style of the existing structure ad the historical period in which it was built.
9. Building Form. Size, mass and scale of alterations to a designated historic structure shall be compatible with that of the existing structure.
10. Color. Color of a building or structure, including trim, roof, etc., shall be appropriate to the architectural style of the subject structure and its historical period.
11. Landscaping. Planting and other ornamental features shall reflect the historical period of the subject structure.
12. Enclosures. Fences, walls or other physical features used to enclose open space or provide privacy shall be compatible with the architectural style of the subject structure and compatible with other historic structures within the historic district or landmark protection area and reflect the historical period of the historic district or landmark protection area.
13. Utilities. Now above-ground power, telephone line and cable television installation shall be reviewed for appropriateness and compatibility. No electric utility boxes shall be used on front facades.
C. Alterations to an intrusion within an historic district shall reflect the architectural style and characteristics of the existing structure. In addition, such alterations shall generally conform to the height, mass, scale, color, etc., of the structures within the historic district.