D.C. Mun. Regs. tit. 10-C, § 2310
2310.1 For replacement windows in a non-contributing building within an historic district, a permit shall be issued if the windows are appropriate for the building and compatible with the historic district.
2310.2 This guidance is intended to promote design compatibility with historic districts, rather than to discourage good contemporary design or creative architectural expression.
SOURCE: Notice of Final Rulemaking published at 51 DCR 7447 (July 30, 2004).