Pest control in the District of Columbia follows alleys, damp basements, and shared walls. Rats use the lanes, the gaps under doors, and the voids around rear ells. Mice travel party walls. Roaches take warm wet chases behind tubs. Termites still want wood where an English basement stays damp or a sill sits near soil. On the wooded edges, ticks and mosquitoes from Rock Creek and the river parks join the list. Say what you saw.
Do not force a species if you are unsure. Droppings under a sink, scratching in a party wall, wings on a sill, or mud tubes on basement masonry are different reports. A vacant house next door is a shelter, and pests do not honor the lot line. A shaded yard full of ivy does similar work on a detached house. Describe the evidence and the room, and say whether pets share the space.
Entry points are local. Gaps at alley doors, holes where pipes leave the brick, broken basement windows, and stoops that have pulled away from the front wall all matter. Cardboard in a cellar and a wet corner from a slow roof leak keep the problem fed. Treatment that ignores water and a gap will not hold. Mention children and a kitchen that cannot sit empty, because preparation is part of the work.
Say whether this is new or a return. You do not need a product name. You need the room and the evidence. Yard mosquitoes along a park edge are not the same call as rodents in the structure. Termites are a different call again. A rowhouse and a house backing to Rock Creek can share a city and not share a pest.
Walk the alley side or the low foundation if it is safe. Pest control in the District of Columbia means shared walls, damp English basements, and green edges that stay wet. Call the number on this page.