Mold remediation built for Capitol Hill
If you're on Capitol Hill, you're in the largest historic rowhouse district in the country — most of these Victorian-era homes were built between 1870 and 1910 with raised English basements and no exterior waterproofing membrane, the same fundamental vulnerability as Georgetown and Dupont but at a much bigger scale.
If you rent an English basement here, know that congressional turnover means a lot of Capitol Hill's rental units change hands every one to two years — a slow leak one tenant never mentions is often only found by the next person, well after mold has had time to establish.
You're close to the Anacostia River and on the same combined sewer infrastructure as much of the older city, so basement-level Category 3 water intrusion during a major storm is a recurring, documented issue here, not a rare one.
Common mold types in Capitol Hill
- Stachybotrys chartarum ('black mold' — chronic English-basement dampness in unwaterproofed 19th-century foundations)
- Chaetomium (long-standing moisture from tenant-turnover-delayed leak reporting)
- Penicillium/Aspergillus (basement rental units with sustained humidity)
- Cladosporium (general background growth on trim and masonry)
We serve U.S. Capitol, Eastern Market, Lincoln Park, Barracks Row (8th Street SE), Folger Shakespeare Library and the wider Capitol Hill area across ZIP codes 20003, 20002.
