SL 09-083

HPA number
HPA 09-321

2101 Constitution Avenue, NW
United States

National Academy of Sciences
Renovation, addition, and site modifications
Review Type
Previous Review


No objection to issuance of permit for exterior restoration, repair, and replacement in kind of masonry, roof, and windows; new accessible entrance and ramps at south terrace; modifications to side drive and parking lot with new canopies; infill of two interior courtyards; infill addition and terrace at north elevation; and new rooftop corridor, as shown in materials received and dated 6 July 2009 and supplemental materials received and dated 15 July 2009. Submission conforms with previously approved concept design. Note: Any subsequent modifications to the approved design, including those made during DCRA technical review, must be resubmitted to the Commission for approval. Refer to Historic Preservation Review Board.