Found Pests After Moving Into a New Home? Here’s What to Do First

You finally got the keys, the boxes are half-unpacked, and then you spot it – a trail of ants across the kitchen counter, a mouse dropping behind the pantry door, or a spider that seems way too comfortable in the basement. Finding pests after moving into a new house is more common than most homeowners expect, and it doesn’t necessarily mean anything is wrong with your home or your decision to buy it.

This guide walks you through why bugs in a newly purchased home show up so often, how to figure out what you’re dealing with, and exactly what to do first – before a minor nuisance turns into a full-blown pest infestation after moving.

Why Do Pests Show Up After Moving Into a New House?

Pests appear in new homes because moving disturbs a property that may have already had activity, and the process of moving boxes, furniture, and belongings can introduce pests or expose ones that were already hiding.

A house doesn’t need to be dirty or old to have pests – it just needs food, water, shelter, and a few unnoticed cracks. Here’s what typically brings them out right around move-in time.

Common Reasons Pests Appear in a Newly Purchased Home

• The home sat vacant. Empty houses are quiet and undisturbed, which is exactly what rodents, spiders, and cockroaches look for. A vacant listing in Detroit’s older neighborhoods can attract pests within weeks.
• Seasonal weather changes. Michigan’s shift from warm summers to cold falls sends ants, mice, and stink bugs looking for shelter indoors – often right when new owners are moving in.
• Pests hitched a ride. Moving boxes, secondhand furniture, and even cardboard from the moving company can carry bed bugs, spiders, or their eggs.
• Pre-existing conditions. A home inspection doesn’t always catch pest activity, especially if it’s seasonal or hidden inside walls, crawl spaces, or attics.
• Disturbed nesting sites. Moving furniture and appliances can expose nests that were previously undisturbed behind the previous owner’s belongings.

Signs You Might Have a Pest Infestation After Moving

Not every bug sighting means an infestation. But certain signs are worth taking seriously right away.

Bugs in a Newly Purchased Home: What to Look For

• Small dark droppings near baseboards, cabinets, or the pantry (a common sign of mice or roaches)
• Discarded insect wings near windows or light fixtures
• Musty or oily odors coming from behind appliances or in the basement
• Chewed cardboard, wiring, or fabric
• Tiny holes in wood trim, especially near moisture-prone areas
• Rust-colored stains on mattresses or bedding (a red flag for bed bugs)
• Live or dead insects clustered in one area of the home, such as a bathroom or basement corner

If you notice even one or two of these signs, it’s worth documenting the location and taking photos. That information helps a pest control technician diagnose the issue faster.

Most Common Pests Found in New Homes in the Detroit Area

Detroit’s mix of older housing stock, humid summers, and cold winters creates ideal conditions for several pests. The ones we see most often in newly purchased homes include:

• Mice and rats – especially in homes with older foundations or gaps around utility lines
• Cockroaches – drawn to kitchens, basements, and homes near multi-unit buildings
• Ants (particularly carpenter ants) – often found near moisture damage or wood framing
• Spiders – usually a sign of an existing insect food source
• Stink bugs and box elder bugs – seasonal invaders common in the fall
• Bed bugs – sometimes introduced during the move itself rather than from the house
• Termites – less visible but more serious, often found in homes with older wood structures

What to Do First If You Find Pests After Moving In

If you’ve spotted signs of a pest infestation after moving, don’t panic – but don’t wait either. Pest problems rarely resolve on their own, and early action almost always means a simpler, less costly fix.

1. Identify the pest, if you can. A photo (even a blurry one) helps a professional narrow down the species and the right treatment approach.
2. Note where you saw it. Kitchen, basement, attic, and bathroom activity often point to different causes and entry points.
3. Avoid DIY sprays as a first move. Store-bought treatments can scatter pests deeper into walls, making the problem harder to treat later.
4. Check your home inspection report and seller disclosures. Some states require sellers to disclose known pest issues, including past termite damage.
5. Seal what you can temporarily. Cover obvious gaps under doors or around pipes with a towel or tape as a short-term measure.
6. Call a licensed pest control company. A trained technician can inspect the full property, not just the room where you spotted activity, and recommend a treatment plan suited to the specific pest.

How to Prevent Future Pest Infestations After Moving

Once the immediate issue is handled, a few habits go a long way toward keeping your new home pest-free.

• Seal visible cracks around windows, doors, and utility entry points
• Store food in airtight containers, especially in the first few weeks of unpacking
• Inspect secondhand furniture before bringing it inside
• Keep firewood and mulch away from the foundation
• Fix leaky pipes and reduce standing moisture in basements and crawl spaces
• Schedule a professional inspection within the first month of moving in, even without visible activity

When to Call a Professional Pest Control Company

Some situations call for a technician rather than a trip to the hardware store: if you see pests repeatedly in the same area, if droppings or damage keep appearing, if you suspect termites or bed bugs, or if you simply want peace of mind before you finish unpacking. A licensed, local pest control team knows the specific pests common to Detroit homes and can identify entry points a first-time homeowner might miss.

Frequently Asked Questions

Is it normal to find bugs after moving into a new house?

Yes. It’s a common experience, especially in homes that sat vacant, were recently renovated, or are located in older neighborhoods. It doesn’t automatically mean the home has a major problem.

How do I know if it’s a full infestation or just a few stray bugs?

A single insect sighting usually isn’t cause for alarm. Repeated sightings, droppings, damage, or odors in the same area are stronger signs of an active infestation that needs professional attention.

Can I treat pests myself before calling an exterminator?

Light cleaning and sealing gaps is fine, but heavy-duty sprays or foggers can push pests deeper into your walls and make the problem harder to treat. It’s best to get a professional opinion first.

Does homeowners insurance cover pest infestations?

Typically, no. Most standard policies treat pest damage as a maintenance issue rather than a covered peril, which is why early treatment matters.

How soon after moving in should I schedule a pest inspection?

Ideally within the first few weeks, even if you haven’t seen anything yet. It’s easier – and cheaper – to catch a small problem before it spreads.

Final Thoughts

Discovering pests in a new home is stressful, but it’s a manageable, solvable problem when you act early and get the right help. Whether it’s a mouse in the pantry or unexplained bites on your ankles, the fastest path to peace of mind is a professional inspection that tells you exactly what you’re dealing with. If you’re settling into a new home in the Detroit area and want the issue handled quickly, don’t wait for it to get worse – request same-day pest control and get a licensed technician out to your home fast.