Large numbers of bees around your house usually mean one of two things: a swarm passing through temporarily, or a colony that has already moved into your walls, eaves, or another sheltered spot. Figuring out which situation you’re dealing with, and what type of bee is involved, determines whether you need to do anything at all or call in professional help.
Identify What You’re Seeing
The first step is figuring out which insect is actually buzzing around. Different species behave very differently, and the right response depends on accurate identification.
Honey bees are about half an inch long with fuzzy, golden-brown bodies. They build large nests in cavities like hollow trees, attics, and wall voids. If you see a dense cloud or a football-sized cluster of bees hanging from a tree branch, fence, or overhang, that’s a swarm. If you notice a steady stream of bees entering and exiting a gap in your siding, soffit, or roofline, they’ve likely established a colony inside your wall.
Carpenter bees are about an inch long and look similar to bumblebees, but their abdomen is black, shiny, and hairless. Males are the ones you’ll notice most: they hover aggressively near porches, decks, and eaves, sometimes diving at people. They can’t sting. Females bore perfectly round, half-inch-diameter holes into unpainted or unstained wood. Look for small piles of sawdust beneath wooden surfaces.
Bumblebees are large and round with dense yellow and black hair covering their entire body, including the abdomen. They typically nest underground or in clumps of grass and leaf litter, and their colonies are small. They’re generally not a structural concern.
Sweat bees are tiny, often metallic green, and nest in bare soil. They’re attracted to perspiration. If small, shiny bees keep landing on you while you’re outside, these are likely the culprit.
Honey Bee Swarms: What’s Happening
A honey bee swarm looks alarming but is one of the least dangerous bee encounters you can have. Swarming happens when a colony outgrows its hive. The old queen leaves with roughly half the workers to find a new home. The swarm clusters in a temporary spot, usually a tree branch or the side of a building, while scout bees fan out to search for a suitable cavity.
These clusters typically stay put for a few hours to a day, though some linger for several days. Swarming bees are not protecting brood or honey stores, so they’re far less defensive than bees guarding an established hive. That said, they will sting if you physically disturb the cluster, so keep your distance. In most cases, the swarm moves on by itself. If it doesn’t leave after a couple of days, or if it’s in a high-traffic area, a local beekeeper will often collect it for free since a healthy swarm is valuable to them.
An Established Colony in Your Walls
If you see bees entering and exiting the same small gap in your house repeatedly, day after day, you’re dealing with a colony that has moved in. This is a more serious situation. Honey bees don’t directly damage wood or framing, but over time a colony inside a wall can accumulate up to 40 pounds of honey by the end of spring, along with significant amounts of wax comb.
The real problems come later. If the colony dies or is killed without being fully removed, the stored honey ferments and seeps into drywall, causing staining and water-like damage. Leftover honey also attracts ants, cockroaches, and other pests. Dead bees left behind can lead to carpet beetle infestations, which then spread to damage natural fibers like wool, silk, and fur elsewhere in the home.
One common mistake is plugging the entrance hole with caulk or foam. This traps the bees inside, and they will search for another way out, often finding gaps around baseboards, electrical outlets, or vents and emerging inside your living space.
Getting an Established Colony Removed
For a colony living inside a wall, you have two options: live removal by a beekeeper or eradication by a licensed pest control operator. Live removal is the preferred choice when possible. A beekeeper will open the wall, physically remove the comb and bees, and relocate the colony. This process involves cutting into the wall or ceiling to access the nest, vacuuming or brushing the bees into a hive box, and removing all wax and honey so it doesn’t rot in place.
Costs for a structural cutout typically range from $200 to $550 and up, depending on how difficult the access is. A straightforward removal from an exterior wall might run $250 to $350, while a colony deep inside a second-story soffit or behind stucco can cost significantly more. Most beekeepers are not responsible for repairing the wall afterward. Repair costs add anywhere from a hundred dollars for simple patching to several thousand if stucco, siding, or interior drywall needs professional restoration.
To find a beekeeper who does removals, search for your county’s beekeeping association or call your local agricultural extension office. Many maintain lists of registered beekeepers willing to do cutouts.
Carpenter Bee Damage and Prevention
If the bees around your house are carpenter bees, the concern isn’t a hidden colony but gradual wood damage. Each female drills a half-inch hole into bare wood, then tunnels sideways to create a gallery where she lays her eggs. Over years, multiple generations reusing and expanding the same galleries can weaken deck joists, fascia boards, and porch railings.
To deal with active holes, wait until evening when the bees are inside, then apply an insecticidal dust or diatomaceous earth into each tunnel entrance. After a few days of no activity, stuff the hole with steel wool (carpenter bees can’t chew through it), then seal the surface with wood putty or caulk.
Prevention is straightforward: carpenter bees strongly prefer untreated, bare wood. Painting or staining all exposed wood surfaces, including nail holes and saw cuts, is the single most effective deterrent. You can also cover vulnerable areas with metal or vinyl flashing. For a less conventional approach, hanging a fake wasp nest (a brown paper bag stuffed with newspaper) near problem areas can discourage carpenter bees from nesting nearby, since they avoid areas that appear to be wasp territory. Installing a “bee house” made of untreated soft wood in your garden gives them an alternative nesting site away from your home.
Keeping Bees From Coming Back
Whether you’ve had a colony removed or want to prevent one from ever moving in, the principle is the same: eliminate entry points. Walk your home’s exterior and look for gaps in siding joints, spaces around utility penetrations, uncapped weep holes, deteriorated soffit panels, and openings where rooflines meet walls. Seal these with caulk, expanding foam, or metal mesh. Never seal an opening where bees are actively going in and out, as this forces them to find a path into your interior.
Natural scent-based deterrents have limited scientific backing, but garlic water (crushed cloves mixed with water in a spray bottle) and diluted distilled vinegar sprayed around former entry points may help discourage scouts from investigating. Citrus oil, peppermint oil, and eucalyptus oil are also commonly used around porches and eaves, though results vary.
Sting Safety
Most single bee stings cause localized pain, redness, and swelling that resolves within a few hours. A small percentage of people develop anaphylaxis, a severe allergic reaction that typically appears within 15 minutes to an hour of being stung. Warning signs include a spreading rash, swelling of the tongue, difficulty breathing or swallowing, and tightness in the chest. If you or someone nearby shows any of these symptoms, use an epinephrine auto-injector if available and call 911 immediately. Getting stung more than a dozen times at once can cause a toxic reaction even in people without allergies, with symptoms like nausea, vomiting, diarrhea, fever, and lightheadedness.
If you know you’re allergic to bee stings, don’t attempt to handle any bee situation yourself. Keep your distance and let a professional manage the removal.