Young Homeowner Inherits a 200-Year-Old House Full of Mice — Then Realizes the Pest Problem Is Bigger Than Traps

Old houses have a way of making every problem feel connected to five other problems. A mouse issue is not always only a mouse issue. Sometimes it points back to sinking floors, gaps under doors, foundation trouble, old siding, loose trim, food storage, overgrown areas outside, and years of small openings nobody ever fully sealed.

That is the kind of situation one young homeowner described after inheriting a 200-year-old house from their grandparents and realizing the mice were completely out of control. They shared the situation in a Reddit post on r/HomeImprovement, asking how to reduce the number of critters in the house without spending a fortune. The original post is here: https://www.reddit.com/r/HomeImprovement/comments/fqldgm/200_yearold_house_is_riddled_with_critters_and/

The homeowner said they were only 24 and had been given the house by their grandparents. At first glance, that might sound like an incredible gift. And in many ways, it probably was. But the homeowner quickly understood why the house had been handed over. In their words, it was falling apart faster than they could keep up with.

The biggest problem was mice.

This was not the occasional mouse sighting that sends someone to the store for a couple of traps. The homeowner said the mice had reached the point where they were not even scared of them anymore. They saw them constantly. That detail tells you the problem had moved past “maybe one got in under the door” and into full infestation territory.

They had already tried traps and other common methods, but nothing seemed to work. That probably made sense once they explained more about the house. The home was sinking, and because of that, the doors had gaps large enough for mice to slide under. In a house that old, there were likely plenty of other openings too. A few traps inside can knock down the visible population, but they will not fix the problem if mice can keep walking in from outside.

That is the frustrating thing about pest control in an older home. You can catch mice all week and still feel like you are losing, because the real issue is access. If doors do not seal, pipes have gaps around them, siding is loose, foundation areas are open, or roof and soffit areas have holes, the house is basically inviting new animals in every night.

For this homeowner, the money side mattered. They were young, the house had major needs, and they were looking for cheap ways to get the problem under control. But the thread made it clear that cheap still had to be strategic. Random traps scattered around the house were not going to solve a whole-house rodent problem.

Commenters urged the homeowner to think of it like a full attack on the house, not just the mice already inside. That meant trapping heavily, cleaning safely, sealing entry points, securing food, cutting down outside hiding places, and eventually dealing with the sinking or structural issues that were allowing animals to get in so easily.

Several users also pointed out that the cleanup mattered. Mouse droppings and urine are not something to casually sweep or vacuum, especially in an old house where they may be in ceilings, cabinets, closets, crawl spaces, and hidden corners. One commenter warned that droppings can carry respiratory risks and should be wetted down with disinfectant before cleanup instead of being stirred into the air.

The advice got very practical. People suggested checking around pipes, behind appliances, under sinks, around attic and crawlspace hatches, along floor and wall seams, and anywhere utilities entered the house. One commenter said mice can squeeze through tiny gaps and may chew through foam, so metal materials like steel wool, hardware cloth, or other tougher patches were better choices for certain openings.

Cats came up, of course, because on the internet, any mouse conversation eventually becomes a cat conversation. Some commenters swore by barn cats or experienced mousers. Others warned that not every cat hunts, and adopting a random kitten does not guarantee anything. A few people said shelters sometimes have barn cats that are not suited to indoor life but can work well in rural or old-house settings, as long as the homeowner understands what they are taking on.

The larger lesson was that the mice were probably a symptom of the house’s condition. The sinking doors mattered. The likely gaps mattered. The outside cover around the house mattered. The old roof or siding openings mattered. If larger critters were also getting in, commenters warned the homeowner to look at roofline, soffit, siding, and attic access points too.

For a 24-year-old suddenly responsible for a 200-year-old house, that is a lot to absorb. The house may have been a gift, but it came with decades of maintenance needs, and the mice were only the most visible part. Getting control of the infestation would not be one simple purchase. It would mean slowly tightening the house back up, one gap and one weak spot at a time.

Commenters were honest that the homeowner needed a bigger plan than a few traps. Several people recommended a heavy trapping campaign first, then sealing entry points once the population was knocked down. Common suggestions included bucket traps, snap traps placed along walls, steel wool around pipe gaps, hardware cloth for larger openings, and checking behind appliances where mice often travel.

A lot of commenters focused on exclusion. They told the homeowner to inspect every possible entry point, including doors, foundation gaps, roof and siding openings, utility penetrations, attic access, crawlspace hatches, and spaces under sinks. Others said overgrown weeds, brush, and clutter around the house should be cut back so mice had fewer protected paths to the structure.

Cleanup was another major point. Commenters warned against dry sweeping or vacuuming mouse droppings and suggested disinfecting contaminated areas before wiping them up. Several users also recommended masks, gloves, and caution in enclosed spaces.

There was plenty of cat talk, too. Some commenters said a good barn cat or proven mouser can make a major difference, while others warned that not every cat will hunt. The better advice was not “get any cat.” It was to talk to a shelter honestly about needing a barn cat or working cat and understand the care that animal would still require.

The thread landed on one practical truth: in an old, sinking house, pest control is really home repair. Until the gaps, openings, and outside conditions are addressed, the mice will keep finding their way back in.