The
Secretary of the Interior's Standards for Rehabilitation
The
Standards (Department of Interior regulations, 36 CFR 67)
pertain to historic buildings of all materials, construction
types, sizes, and occupancy and encompass the exterior and
the interior, related landscape features and the building's
site and environment as well as attached, adjacent, or related
new construction. The Standards are to be applied to specific
rehabilitation projects in a reasonable manner, taking into
consideration economic and technical feasibility.
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 undertaken.
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.
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