How to Keep Wasps Away From Your House: 9 Prevention Tips That Actually Work

Most of the year, wasps are just background noise, but from late spring through early fall they get bolder, especially once a nest is established near your home. Unlike bees, wasps can sting more than once, and they will if they feel their nest is threatened. The good news: most wasp problems are preventable if you remove what draws them in the first place. Here's what actually works, plus a homemade trap you can build in ten minutes if prevention alone isn't cutting it.

Quick answer: Wasps are drawn to food, sugar, and easy nesting spots, so the fastest way to keep them away is to seal up entry points, cover food and trash outdoors, and knock down small nests early in the season before they grow. If a nest is already established or hard to reach, that's when it's time to call a pest control professional instead of handling it yourself.

Know What You're Dealing With

Not all wasps behave the same way, and knowing which one you have changes how you handle it.

• Yellowjackets nest in the ground or inside wall cavities and are the most aggressive of the group, particularly in late summer.
• Paper wasps build the open, umbrella-shaped nests you see under eaves, railings, and decks. They're less aggressive but will sting if disturbed.
• Hornets build large, enclosed nests in trees and shrubs and are the biggest of the three.

Cornell's IPM program warns that yellowjackets and paper wasps that build nests on buildings may become a stinging hazard to the people living there, which is why catching a nest early matters as much as identifying it correctly.

1. Seal Entry Points

Wasps get into homes through gaps most people never notice. Cornell Cooperative Extension points out that critters can come in on a potted plant, through a crack, an open door, a torn screen, or a gap in siding, and the larger the opening, the larger the pest you can end up hosting. Walk the outside of your house and check window frames, door thresholds, siding, vents, and eaves for cracks or holes. Replace torn screens, caulk small gaps, and cover vent and chimney openings with fine mesh. This is the single most effective long-term step, since it stops wasps from nesting inside your walls or attic in the first place.

2. Remove Nests Early, Before They Grow

The best time to deal with a wasp nest is early in the season, when it's still small and only one wasp is tending it. Cornell Cooperative Extension of Tompkins County advises that if you do attempt removal yourself, very early morning is the best time, since the colony has had all night to settle down and won't be back to full activity yet. If you spot a nest early:

• Remove it in the evening or early morning, when wasps are least active.
• Wear protective clothing and keep your distance.
• If the nest is large, high up, or inside a wall or attic, stop and call a professional instead. Established nests can hold a colony that defends aggressively, and that's not worth the risk of a DIY attempt gone wrong.

3. Keep Food and Garbage Covered

Wasps are hunting for sugar and protein, and an uncovered trash can or an open soda on the patio is an easy target. A few habits make a real difference:

• Use trash bins with tight-fitting lids.
• Clean up spills and food scraps right away.
• Cover drinks and food when eating outside.
• Pick up fallen fruit from trees like apples or pears, which draws wasps once it starts to rot.

4. Plant Something Wasps Don't Like

Certain plants have scents that many insects, wasps included, tend to avoid. Adding a few of these to your patio beds or garden won't eliminate wasps on their own, but they help as one more layer of defense:

5. Skip the Strong Fragrances Outdoors

Wasps are drawn to sweet smells, and that includes the ones you're wearing. When you're outside, unscented lotion and deodorant beat floral or fruity perfume, and light-colored clothing draws less attention than bright florals or dark patterns.

6. Build a Homemade Wasp Trap

If wasps are already a nuisance, a simple trap can knock the population down fast.

What you need: a 2-liter plastic bottle, scissors or a utility knife, 1 cup sugar, 1 cup water, ½ cup apple cider vinegar, a few drops of dish soap, and string if you want to hang it.

How to build it:

1. Cut the top third off the bottle to create a funnel shape.
2. Mix the sugar, water, vinegar, and dish soap in the bottom half. The vinegar is what draws wasps in while keeping bees away.
3. Flip the top piece upside down and set it inside the bottom half, funnel-side down, and tape it in place.
4. Hang or place the trap near patios, garbage bins, or wherever you've seen the most activity. Refresh the bait every few days.

Commercial traps work the same way and are available at most hardware stores if you'd rather skip the DIY step.

7. Hang a Decoy Nest

Wasps are territorial and generally won't build a nest close to one that's already occupied. Hanging a decoy nest in early spring, before real nests form, can discourage new colonies from settling near your home.

DIY vs. Natural Repellents vs. Professional Treatment

Prevention steps and homemade traps handle small, early-stage problems well. They fall short once a colony is established. A few things to weigh:

• DIY removal works for small, exposed, easy-to-reach nests early in the season, but it puts you within sting range of an entire colony if the nest is bigger than it looks.
• Natural repellents (plants, scents, decoy nests) reduce the odds of wasps settling near your home, but they won't remove an existing nest.
• Professional treatment is the only reliable option once a nest is large, hidden inside a wall or attic, or in a spot you can't safely reach.

When to Call a Professional

If you're dealing with a nest that's grown large, is built into your home's structure, or you've already been stung trying to handle it yourself, it's time to bring in help. A professional can identify the species, treat the nest safely, and check for other entry points you might have missed. Contact A&C Pest Management's wasp and bee control team if a nest on your property has gotten past the point of a DIY fix.

The Bottom Line

Most wasp problems come down to two things: an easy food source and an easy place to nest. Seal up your home, keep food and trash covered, and check for small nests early in the spring, and you'll head off most problems before they start. For everything else, that's what we're here for.

At A&C Pest Management, we've been protecting Long Island homes from wasps, bees, and every other backyard pest for over 55 years. Our technicians know which species are active in Nassau and Suffolk County yards and how to remove a nest safely without putting your family at risk. If wasps have taken over your yard, get a free quote, and we'll take it from here.

Sources

Braband, L., and J. Gangloff-Kaufmann. "Integrated Pest Management for Stinging Insects." NYS IPM Project Reports, Cornell Cooperative Extension, 2006, ecommons.cornell.edu/entities/publication/6ffcc51d-0707-4497-82ce-5e02aecdc165. 

"Bees and Wasps." New York State Integrated Pest Management Program, Cornell University, cals.cornell.edu/new-york-state-integrated-pest-management/outreach-education/whats-bugging-you/bees-and-wasps.

"Stinging Insects Q&A." Cornell Cooperative Extension of Tompkins County, ccetompkins.org/gardening/home-gardening/publications/stinging-insects-q-a.

"Pests & IPM." Cornell Cooperative Extension of Dutchess County, ccedutchess.org/gardening/pests-ipm.