A bumblebee nest in your house is almost always a temporary situation that resolves on its own. Bumblebee colonies last only two to six months, cause no structural damage, and the nest dries up and crumbles once the bees leave. In most cases, the best course of action is to leave it alone and let the colony finish its natural cycle.
Where Bumblebees Nest Inside a Home
Bumblebees don’t bore into wood or chew through drywall. They’re opportunists that move into cavities that already exist. In the wild, they favor abandoned rodent burrows, leaf piles, and underground gaps. In a house, that translates to wall voids, spaces behind siding, attic insulation, under decking, and sometimes inside old bird boxes mounted on the structure. A queen emerging from winter hibernation in spring scouts for a sheltered, insulated spot, and a gap as small as a quarter inch is enough for her to squeeze through.
The nest itself is modest. Unlike a honeybee hive with its large sheets of honeycomb, a bumblebee nest is a small, loosely organized cluster of waxy nectar pots and brood cells, often no bigger than a grapefruit. The bees line it with soft insulating material like dried grass or bits of existing insulation. A mature colony at its peak in late summer holds several hundred bees, far fewer than the tens of thousands in a honeybee hive or a yellowjacket nest.
How to Confirm It’s Bumblebees
Getting the identification right matters because the response for bumblebees, honeybees, and yellowjackets is very different. Bumblebees are stout, fuzzy, and round-bodied, typically 10 to 23 mm long, with black and yellow hair (sometimes with white or orange patches). They fly slowly and somewhat clumsily compared to wasps. Yellowjackets are sleeker, with smooth, shiny bodies and sharply defined black-and-yellow stripes. They’re more aggressive, especially near food, and build papery nests that can grow very large. Honeybees fall in between: moderately hairy with golden-brown stripes and a longer abdomen, around 10 to 15 mm.
Watch the entrance point. Bumblebees trickle in and out slowly, one or two at a time, often hovering near the opening before entering. A steady, fast stream of insects suggests honeybees or yellowjackets. If you’re seeing papery material around the opening, that points to wasps, not bees.
Why Leaving the Nest Alone Usually Works
Bumblebee colonies are annual. A single queen starts the colony in spring, the first workers emerge after about three to four weeks, and the colony grows through summer. By late summer and early fall, the queen stops producing workers and starts producing new queens and males instead. These new queens leave to mate, then find a sheltered spot to hibernate through winter. The original queen, the males, and all the workers die naturally as temperatures drop. The nest is simply abandoned.
Once no bees have been seen entering or leaving for about two weeks, the colony is finished. The small wax structure left behind dries out and won’t attract new colonies on its own. At that point, you can safely seal the entry hole to prevent a new queen from choosing the same spot the following spring.
Bumblebees are not aggressive unless the nest is directly disturbed. They can sting (and unlike honeybees, they can sting more than once), but they rarely do so unprovoked. If the nest is in a wall void or attic space where you don’t need regular access, you can coexist with it for the remaining weeks or months of its life without any real inconvenience.
When You Can’t Leave It
Sometimes the nest location makes waiting impractical. A nest next to a doorway your family uses daily, near a child’s play area, or in a spot where someone with a bee allergy passes regularly may need to be relocated. Relocation is the right word here, not extermination. Consumer insecticides are not approved for use against bees, and spraying a colony inside a wall creates worse problems than a live one. A poisoned nest left in a cavity can attract secondary pests like moths, beetles, and rodents.
If relocation is necessary, it should be done at night when all the bees are inside the nest and unable to fly. Use a flashlight with a red beam or cover a regular flashlight with red plastic, since bees cannot see red light. Wear long sleeves and gloves at a minimum. The goal is to gently scoop or lift the entire nest, keeping the fragile brood cells and nectar pots intact, and place it into a container lined with soft nesting material like cotton batting or dried grass. Move it to a sheltered spot at least 15 feet from the original location.
If the nest is deep inside a wall void and you can’t physically access it, a local beekeeper or wildlife removal specialist is your best option. Many beekeepers will handle bumblebee relocations, and some conservation organizations maintain lists of volunteers willing to help.
What Not to Do
Spraying the nest with insecticide is the single biggest mistake. The spray rarely reaches the entire colony, and the consequences ripple outward. Research from the University of Kentucky’s entomology department has shown that bees from other colonies rob poisoned nests and carry contaminated material home, killing healthy colonies in the process. Inside a wall, a dead colony also leaves behind wax and nectar that can melt, seep through drywall, cause staining and damp patches, and produce a lingering smell.
Sealing the entry hole while the colony is still active is another common error. The bees won’t simply die quietly inside. They’ll search for another way out, and that route may lead them into your living space through gaps around light fixtures, vents, or baseboards.
Conservation Context
Bumblebees are important pollinators, and several species are in serious decline. The rusty patched bumblebee became the first bumblebee listed as federally endangered in 2017, with roughly 1.5 million acres designated as critical habitat across parts of Illinois, Iowa, Minnesota, Virginia, West Virginia, and Wisconsin. While most bumblebee species you’ll encounter in your house aren’t federally protected, their populations are under pressure from habitat loss and pesticide exposure. Letting a nest complete its cycle when you can is a genuinely meaningful choice for local pollinator health.
Sealing Up After the Colony Leaves
Once the nest is inactive (no bee traffic for two weeks), seal entry points to prevent reuse. Bees can fit through openings as small as one-quarter inch, so you need to be thorough. Expandable foam and exterior caulk work well for cracks around pipes, conduits, and siding gaps. Check soffit vents and replace any screening with mesh smaller than one-quarter inch. Number 8 hardware cloth, which has one-eighth inch openings, is an excellent choice.
Inspect for areas of rotting or sagging wood that create access to wall voids, and repair them. Close your fireplace flue when it’s not in use, since bees occasionally enter through chimneys. Seal gaps around your water meter cover. The best time to do this work is late fall or winter, after colonies have died off but before new queens start scouting in spring. During peak activity from roughly March through June, do a weekly walk around the exterior to catch any new scouting activity early, before a queen has committed to a nesting site.