(a) Windows and Doors. Existing windows and doors, including the window sash, glass, lintels, frames, molding, shutters, and steps, should be retained and repaired whenever possible. If a new window or door must be used, it should be of a material compatible with the front facade. Changing the size or arrangement of windowpanes, muntins, and rails where they contribute to the historic and architectural character of the building is discouraged. Inappropriate window or door features on significant facades are discouraged. Replacement windows in restored and rehabilitated structures should retain the dimensions and pane divisions of the window being replaced. Paired casement windows, although not historically common, are generally acceptable because of their vertical orientation. The use of single-pane Orphan Annie windows should not be permitted unless equipped with snap-in muntins.
(b) Storm Windows. Exterior storm windows and doors may be installed if they are visually unobtrusive, do not cause damage to existing frames, and can be removed in the future. Storm windows should match the trim color. Mill-finished aluminum can be painted to match.
(c) Porches and Steps. Porches and steps that are appropriate to the building and the site should be retained. The original material and architectural features of porches and steps should be retained whenever possible.
(d) Roofs. The original roof shape should be preserved. All architectural features that give the roof its essential character should be preserved or replaced in a compatible manner.
(e) Architectural Metals. Architectural metals should be cleaned when necessary with an appropriate method that does not erode the surface.
(f) Masonry Surface and Repointing. Original masonry should be retained whenever possible, without applying any surface treatment, including paint. When repainting of mortar joints is absolutely necessary, old mortar should be duplicated in composition, color, texture, method of application, and joint profile. The surface cleaning of structures shall be undertaken with the gentlest means possible.
(g) Wood Frame Buildings. Architectural features, such as cornices, brackets, window and door molding and details, clapboard, weatherboard, shingles, and other wood siding, are essential and parts of the character and appearance of frame buildings. They should be retained and preserved whenever possible. Frame buildings should not be resurfaced with new materials that are inappropriate for the building or that will cause deterioration of the original structure.
(h) Structural Systems. Existing foundations should not be disturbed with new excavations that could undermine the structural integrity of the building.
(i) Mechanical Systems. Exterior cables (e.g., electrical, telephone, and cable TV) should be installed in places where they will be visually unobtrusive. Audio/video antenna and mechanical equipment (e.g., air conditioning and solar panels) should be placed in as inconspicuous a location as possible.
(j) Garages. If an ally is adjacent to the dwelling, a new garage should be located off the alley. Where alleys do not exist, garage facing the street or driveway curb cuts may be acceptable. Garage doors should not face the street. If this is found necessary, single garage doors should be used to avoid the horizontal orientation of two-car garage doors.
(k) Parking Spaces. Parking spaces should be screened from the street and sidewalk by landscaping.
(l) Walls, Fences, and Railings. Removal or replacement with inappropriate material or design is discouraged where these are historically or architecturally important elements of the design and character of the structure and district.