Mouse Control with Rowhouse Entry-Point Sealing

Baltimore rowhouses lose the mouse fight at the perimeter, not in the kitchen. On attached blocks in Canton, Highlandtown, and Locust Point, mice move along the joist bays that run over the party wall and drop into the next house through the gap where a plumbing stack or old gas line passes through brick. In Hampden and Remington, Formstone and later additions leave voids behind the facade that mice use as a vertical highway from the alley grade up to the second floor. Federal Hill and Fells Point homes with English basements often have an original coal chute, an abandoned floor drain, or a rear kitchen door with a half-inch daylight gap under it — all of which read as an open door to a mouse. The inspection is the service; the sealing is what makes it hold. We note where droppings are, which direction the runways travel, and which openings show grease marks or fresh gnawing, then seal those first.

Trapping-only work fits a narrow set of situations: one or two mice after a propped alley door, a garage entry, a single delivery-related event in a detached Roland Park or Charles Village house with a sound stone foundation. If droppings show up in more than one room, if you hear activity inside a shared wall at night, or if a previous treatment quieted things for a few weeks and then failed, trapping-only will repeat that failure. The trade-off is honest: adding exclusion costs more up front and requires a second visit, because we seal after we know the routes rather than guessing on day one. In exchange, you stop paying for the same mouse problem twice a year. Landlords and small rowhouse owners usually run the numbers in favor of sealing once, since the alternative is a recurring tenant call.

Baltimore City is an independent city, not part of Baltimore County, and its older attached housing stock behaves differently from post-war county neighborhoods — brick, mortar, and 100-year-old penetrations instead of vinyl siding and sill plates. Alley-facing kitchens near dense trash pads bring mice to the wall in the first place, so we also flag the outdoor conditions feeding pressure: bin lids that don't close, bird seed or pet food stored on a back patio, ivy or overgrowth touching the rear wall in Bolton Hill's alleys. Interior work leans on trapping and sealing rather than scattering loose bait around living space, and any exterior rodent stations are discussed with you before placement — including in rentals, where we can keep visits discreet and coordinate a single arrival window with your tenant.

After sealing, the follow-up visit exists to verify: traps checked, seals inspected for new gnawing, and any missed opening closed. We find where they're getting in — that is the measurable outcome, and it is what separates a sealed rowhouse from a sprayed one. Call (667) 309-5375 and we will look at the house before quoting a number.