Permit applications for window work shall include close-up photographs of existing windows in the building or other materials adequate to document the condition of existing windows.
For applications to replace windows, supplemental materials shall include documentation sufficient to indicate the design and construction of the proposed new windows, such as drawings from the manufacturer's catalogue or other drawings with comparative dimensions, details of construction, configuration, color and finish.
If necessary, the staff may request material samples or an on-site mock-up.
D.C. Mun. Regs. tit. 10, r. 10-C2313