Approval is not required for storm windows provided they conform with recommended guidelines below. An exception for qualifying low-moderate income homeowners is available.


  • Windows on an historic building are important elements defining its architectural character and historic significance. Their original materials and features should be respected and retained. Replacement should only be done if necessary and if similar to the original.
  • Window replacement should be considered only when one of the following conditions exists and can be documented:
    • The existing windows are not original and are not significant.
    • The condition of existing windows is so deteriorated that repair is not economically feasible.
  • Rather than replacing windows to attain energy efficiency, existing windows should be repaired and retrofitted using caulk, weatherstripping, modern mechanical parts, and storm windows. Some windows can be slightly altered to accept insulated glass.

    Storm windows should fit window openings exactly, without the use of spacers. They should be painted, anodized, clad or otherwise coated in a color to match the windows or trim. They should be compatible with the window pattern (no simulated muntins or decorative details), should not obscure window trim and may be made of wood, aluminum or other metals, or vinyl. Consider interior storm windows.

    Original window trim should be preserved and retained. Only badly deteriorated sections should be replaced to match original. Decorative window caps or other details should be added only if there is evidence that they existed originally.

    Window shutters (also known as blinds) may be installed if there is evidence that they once existed on a building, and then, only on those windows which had shutters. For evidence, look for old photographs, remaining hinges and hinge mortises. If the building did not have any shutters and you wish to use them, put them on the inside of the window.


  • Avoid replacement windows not similar to the original in size, dimensions, shape, design, pattern, and materials. Example: metal, vinyl cladding, snap-in muntins, and tinted glass are not considered similar to original wood windows.
  • Avoid creating new window openings or eliminating original window openings. This should be considered only when necessary and must be avoided on significant, and/or highly visible elevations.

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