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| Secretary of
the Interior’s Standards for
Rehabilitation |
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The basic purpose of the Standards is to
maintain the primary character-defining elements
of a property. They generally do not require the
restoration of missing elements; rather, they
are designed to allow for changes that are
needed to adapt a building to a new function.
- A property will be used
as it was historically or be given a new use
that requires minimal change to its distinctive
materials, features, spaces and spatial
relationships.
- The historic character
of a property shall be retained and preserved.
The removal of historic materials or alteration
of features and spaces that characterize
property will be avoided.
- 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 will not be undertaken.
- Changes to a property
that have acquired historic significance in
their own right will be retained and preserved.
- Distinctive features,
finishes, and construction techniques or
examples of craftsmanship that characterize a
historic property will be preserved.
- Deteriorated historic
features will be repaired rather than replaced.
Where the severity of deterioration requires
replacement of a distinctive feature, the new
feature will match the old in design, color,
texture, and other visual qualities and, where
possible, materials. Replacement of missing
features shall be substantiated by documentary
and physical evidence.
- Chemical or physical
treatments, if appropriate, will be undertaken
using the gentlest means possible. Treatments
that cause damage to historic materials will not
be used.
- Archeological resources
will be protected and preserved in place. If
such resources must be disturbed, mitigation
measures will be undertaken.
- New additions, exterior
alterations, or related new construction will
not destroy historic materials, features and
spatial relationships that characterize the
property. The new work shall be differentiated
from the old and will be compatible with
historic materials, features, size, scale,
proportion, and massing to protect the integrity
of the property and its environment.
- New additions and
adjacent or related new construction will 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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