The Standards for Rehabilitation (codified in 36 CFR 67 for use in the Federal Historic Preservation Tax Incentives program)
address the most prevalent treatment. '"Rehabilitation" is defined as "the process of returning a property to a state of utility,
through repair or alteration, which makes possible an efficient contemporary use while preserving those portions and features
of the property which are significant to its historic, architectural, and cultural values."
1. A property shall be used for its historic purpose or be placed in a new use that requires minimal change to the defining
characteristics of the building and its site and environment.
2. The historic character of a property shall be retained and preserved. The removal of historic materials or alteration of
features and spaces that characterize a property shall be avoided.
3. Each property shall be recognized as a physical record of its time, place, and use. Changes that create a false sense of
historical development, such as adding conjectural features or architectural elements from other buildings, shall not be
4. Most properties change over time; those changes that have acquired historic significance in their own right shall be
retained and preserved.
5. Distinctive features, finishes, and construction techniques or examples of craftsmanship that characterize a property
shall be preserved.
6. Deteriorated historic features shall be repaired rather than replaced. Where the severity of deterioration requires
replacement of a distinctive feature, the new feature shall match the old in design, color, texture, and other visual qualities
and, where possible, materials. Replacement of missing features shall be substantiated by documentary, physical, or
pictorial evidence.
7. Chemical or physical treatments, such as sandblasting, that cause damage to historic materials shall not be used. The
surface cleaning of structures, if appropriate, shall be undertaken using the gentlest means possible.
8. Significant archeological resources affected by a project shall be protected and preserved. If such resources must be
disturbed, mitigation measures shall be undertaken.
9. New additions, exterior alterations, or related new construction shall not destroy historic materials that characterize the
property. The new work shall be differentiated from the old and shall be compatible with the massing, size, scale, and
architectural features to protect the historic integrity of the property and its environment.
10. New additions and adjacent or related new construction shall be undertaken in such a manner that if removed in the
future, the essential form and integrity of the historic property and its environment would be unimpaired.
The Standards are to be applied to specific rehabilitation projects in a reasonable manner, taking into consideration economic
and technical feasibility.
Source: Secretary of the Interior Standards for
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