Beware of DC Laws that Protect Tenants
Rental Property License Requirements
Residential Housing licenses are required for all rental properties in the District of Columbia including Homes, Apartments, Condominiums, Basement Apartments and Apartment Buildings. For details, visit: http://dcra.dc.gov/service/residential-housing-rental-license-information.
Other recommended reading
The Essential Guide to Being an Amateur Landlord in DC (Urban Turf, Mar. 31, 2016)
Before becoming a landlord, do the homework (Washington Post, Jan. 11, 2013)