SL 17-133

HPA number
HPA 17-497

601 Pennsylvania Avenue, NW
United States

Office building
Modifications to penthouse and rooftop terrace
Review Type


No objection to the concept for an addition to an existing penthouse and for two new open trellises and other modifications to an existing roof terrace, as shown in materials received and dated 7 July 2017 and supplemental materials received and dated 6 September 2017. Refer to US General Services Administration. Refer to National Capital Planning Commission. Refer to DC Historic Preservation Office. Note: This is a concept approval only. When ready, submit the permit drawings and a permit application to DCRA for review by the Commission.