It's one of the oldest enclaves in the D.C. region developed exclusively as affordable housing for seniors, and now the Elizabeth House in Silver Spring is being primed for a major overhaul. Lee Development Group and the Housing Opportunities Commission of Montgomery County plan to launch a $200 million mixed-use project at the site by Second Avenue and Fenwick Lane to include two additional apartment buildings, new non-residential uses like a wellness center and artist workspace, and significant...