1. Respect for Documentary Evidence: restoration should be based on research, not speculation. Photographs, drawings and physical evidence are preferred information sources.
   
2. Respect for Original Location: moving a building should always be a last resort for protecting a structure. A change in site diminishes significantly the historic value of a building.
   
3. Respect for Historic Material: repair and conservation is the best route, with replacement of materials limited to when it is absolutely necessary.
   
4. Respect for Original Fabric: repairs should be done with like materials. To use different material than the original alters the integrity of the historic property.
   
5. Respect for the Building’s History: restoring to one period at the expense of another changes the integrity of the evolution of the historic structure. Later additions that might be destroyed to restore a building to a particular time period in fact destroy the evidence of the historic evolution.
   
6. Reversibility: If alterations are made in a manner that means the original design and technique is respected, it can be returned to its original condition at a later date. Original material might be removed, numbered and protected for later restoration, or covered in situ, so that the changes made are reversible.
   
7. Legibility: new work should not be made to appear exactly as the old. It is important to be able to distinguish new material and work from the original, and these distinctions should not be blurred.
   
8. Maintenance: regular care can postpone the need for restoration indefinitely. Regular upkeep helps avoid the need for major restoration work, and thus reduces the associated high costs.

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