The two animals you are most likely to have
Getting the species right early saves you from paying for the wrong repair, because mice and rats use completely different doors. House mice are small, curious and short range. They will investigate a new trap within a night or two, live inside a wall void a few feet from where they feed, and leave pointed droppings the size of a grain of rice in tight clusters. Because they get through a quarter-inch gap, the openings that let them in are the ones nobody notices: a seam behind a dishwasher, the gap where a gas line enters, the corner of a crawl space hatch. Norway rats are cautious, heavy and long range. They dig burrows two to three inches wide in soil against foundations, under sheds and beside steps, and forage well beyond your property line. They avoid new objects for days, which is why a trap that catches a mouse in one night may sit untouched for a week. Kentucky also has deer mice, but they are an outbuilding species. If the droppings are in a barn, shed or detached garage that has been closed up, treat that space with the wet cleanup rules rather than a broom, and handle it before you start sorting through what is stored there.
A Louisville calendar you can plan around
Rodent pressure in Louisville runs on a schedule, and knowing it turns an emergency into a maintenance item. Through June, July and August, with highs near 88F and heavy vegetation, the population lives outdoors and complaints drop off. This is the quiet stretch, and it is also the single best time to do sealing work: the ground is dry enough to work, the crawl space is at its least miserable, and you are ahead of the animals rather than behind them. September through November is the entry window. As nights cool toward the 27F winter average, animals start walking foundations and taking whatever opening they find first. Call volume climbs, and so do prices for anyone trying to book work at short notice. December through February is the indoor season. Whatever got in is now breeding inside heated walls with no predators, so a problem that looked minor in October is established by February. March through May is audit time. Wet spring ground shows burrow openings clearly, and it is the right moment to check whether last year's patches held. Fresh gnawing around the edge of a repair tells you which one failed.
Wet ground, damp crawl spaces, and why drainage counts
Food discipline gets all the attention in rodent advice, and in this part of the country it is the less useful half. With 45 inches of rain landing on Louisville each year, nothing here is ever short of a drink. What that means practically is that you cannot make a property unattractive by tidying the pantry. You make it unattractive by taking away cover and dryness. A rat will choose a burrow it can dig into soft ground beside a downspout over one in packed soil twenty feet out, every time, and it will choose a crawl space with torn vapor barrier over an open yard. So the list of jobs that quietly count as rodent work is longer than most people expect. Getting roof runoff away from the wall firms up the soil that burrows depend on. Pulling ivy and tall grass off the foundation exposes the runways. Getting firewood and stacked boxes up off the ground removes the staging area between the yard and the building. None of that replaces metal at the openings, and none of it should be done instead of sealing. Pair the two in the same visit, because cover removal without sealing pushes animals toward the building rather than away from it.
What a real first inspection covers
A visit that walks the kitchen and sets a few traps has not inspected anything. Most of what decides the outcome is in spaces you do not normally enter. Outside, expect a full perimeter walk: burrow openings in soft soil, worn runways through mulch or grass, clearance under every exterior door, the condition of each crawl space and foundation vent, and every point where a utility line passes through the wall. Any branch or vine touching the roof gets noted too, since that is a route to the eave. Underneath and above, the crawl space and attic tell the real story. Droppings on insulation, rub marks on framing, torn vapor barrier and daylight at the sill are the evidence that matters, and none of it is visible from a hallway. What you should end up holding is a list: where each opening is, what material closes it, where traps are going, and the dates somebody returns. If all you are offered is a monthly figure and reassurance, ask for that list before agreeing to anything. A provider who has genuinely inspected the house can produce it easily.
Reading two quotes side by side
Two proposals can carry similar prices and describe very different amounts of work, so compare the scope before the number. Start with the repairs. Does the document name openings and the material for each, or does it list exclusion as a single line item. Only the itemized version can be verified afterward, and only the itemized version changes the building in any lasting way. Then check the follow-up. How many return visits are inside the price, what triggers an extra charge, and what happens if activity restarts in six weeks. A trapping schedule with no dates attached is a hope rather than a plan. Third, look at the outside and the outbuildings. If there are burrows in the yard, or a barn or detached garage on the property, ask plainly whether those are in scope. In a market where median home values sit near $224,000, adding a second structure can shift a quote substantially, and providers do not always volunteer that it was excluded. Finally, ask about rodenticide: whether it is planned, where it would go, and how pets and other wildlife are kept away. The cheaper proposal is often a recurring station service that never touches the structure at all.