Can neighboring homes' pest issues spill into my home in winter?

Rodents don't recognize property lines, and their range is genuinely large enough to matter — a widely cited rodent-ecology figure puts a rat's home range at up to 50 yards, which comfortably spans several suburban lots. An infested or long-vacant neighboring property, or something as simple as an unsecured dumpster nearby, adds real pressure to the surrounding area, not just to the property where the problem originates.

That pressure compounds in a specific way, too: once one mouse finds a route into a structure, it leaves scent trails that help guide others to the same spot, so an established entry point can attract more activity over time rather than staying a single, isolated incident.

None of that changes the fact that entry into your specific home depends on your specific gaps. A rat with a 50-yard range covers plenty of ground, but it only gets inside where there's an opening — a sill-plate gap, an unsealed utility penetration, an open crawlspace vent. Two houses next to the same infested lot can have very different outcomes based entirely on how well each one is sealed.

That's the honest core of a "partly" answer: the pressure is real and outside your control, but the entry — the part that actually turns pressure into your problem — is squarely inside it.

Detached single-family homes deal with neighbor spillover primarily as ambient pressure — more mice or insects in the general area, entering (or not) through the usual gaps. Attached housing, duplexes, and multi-family buildings add a second, more direct pathway: shared walls, common utility chases, and connected crawlspaces that let pests move between units without ever going outside.

In that setting, sealing your own unit's penetrations at the shared wall matters more, not less, because the corridor is a physical structure rather than just open ground. Coordinating with neighbors, where the relationship supports it, closes the loop that acting alone can't.