For the purposes of these standards, a "major building" in a historic district is a contributing building that is individually distinguished by characteristics like symbolic value, visual prominence, substantial size, architectural elaboration, or historical association. These buildings often meet the criteria for historic landmark designation, and typically include public and institutional buildings, schools, mansions, and places of worship or public assembly.
Major buildings in historic districts shall be treated on a case-by-case basis, usually according to the same standards applicable to historic landmarks.
D.C. Mun. Regs. tit. 10, r. 10-C2307