These projects receive historic rehabilitation tax credits. The National Park Service, which reviews these projects, does not permit removing roof areas to create courtyards and natural light (and air) wells.
David-
I have been involved in the adaptive reuse of historic buildings using Federal Historic Tax Credits for the past 15 years. Across the country, there are many examples of historic buildings, particularly large, former industrial and warehouse buildings, which have had portions of the interior structure removed in order to create lightcourts, courtyards and even enclosed atrium-type spaces. I have personally been involved in several of these projects, all of which have received Historic Tax Credits.
Some of the spaces are only a few hundred SF in area, and some are several thousand SF, depending on the type and scale of the structure. But in every case, the projects were approved by the NPS because the alterations did not significantly alter the historic character of the buildings. In the Secretary of the Interior's Standards for Rehabilitation, Standard #1 reads:
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.
In practice, this allows for natural light and ventilation to be brought to the core of a large building, which is particularly important in converting historic buildings to residential and hotel uses.
I am strongly opposed to apartment units which lack natural light and ventilation. I would likely decline to be involved with a developer who proposed such a plan. Fortunately, the NPS recognizes that it is sometimes necessary to alter less character-defining elements in order for a historic building to be put back into productive use.
I hope this helps with your efforts in Richmond. Best of luck.
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Andrew Smith AIA
Trivers Associates, Inc.
Saint Louis MO
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