Snakes in the Basement: Common Species in SE Michigan and What to Do

If you’ve ever gone downstairs to do laundry or grab something from storage only to find a snake slithering along your basement wall, you’re not alone. Snakes in the basement are a surprisingly common occurrence, especially in older homes with small foundation cracks or gaps around pipes. While the sight can be alarming, most snakes that end up indoors are harmless and are simply seeking shelter, food, or warmth.

Here's what homeowners need to know about the common snake species found in Southeast Michigan basements—and what steps you should take if you find one.

Common Basement-Invading Snakes in SE Michigan

1. Eastern Garter Snake

Easily the most common snake in the region, the eastern garter snake is non-venomous and generally harmless to humans. Recognizable by their distinctive yellow or white stripes running down their body, garter snakes often enter basements in search of cooler temperatures in summer or warmth during cooler months.

2. Northern Brown Snake

Also known as Dekay’s brown snake, this small, shy species prefers moist environments and may slip into basements with high humidity or areas near sump pumps. They are brown or gray with a lighter stripe down their back and two rows of small black spots.

3. Eastern Milk Snake

Sometimes mistaken for a rattlesnake due to its pattern and defensive behavior, the milk snake is non-venomous and relatively rare indoors, but can occasionally make its way into a basement. These snakes feed on rodents, which can make your basement appealing if you have a mouse problem.

4. Smooth Green Snake

This bright green, insect-eating snake is less commonly seen indoors but might venture into basements with access to outside vegetation. They're small, shy, and completely harmless.

Why Snakes End Up in Basements

Snakes typically find their way into basements for a few key reasons. One of the most common is access—small cracks in the foundation, unsealed vents, or gaps around plumbing pipes create easy entry points from the outside. Once inside, basements provide ideal conditions: they’re dark, cool, and often damp, which is especially appealing during the hot summer months or for hibernation in colder seasons. Another major attractant is food. If your basement has a rodent or insect problem, it can act like a buffet for snakes that prey on these pests. Essentially, your basement might be offering shelter, temperature stability, and a food source—all things snakes instinctively seek out.

What to Do if You Find a Snake Indoors

Stay Calm
Most snakes are not aggressive and prefer to avoid humans. Do not try to touch or kill the snake.

Identify From a Distance
If possible, take a photo to help identify the species later. This can help professionals determine whether it's dangerous or not.

Do Not Attempt Removal Yourself
Snakes can be fast and unpredictable. Improper handling can lead to injury or snake escape deeper into the home.

Call a Professional
Contact Wildlife X Team of SE Michigan for safe, humane removal and exclusion services. Our team is trained to handle all local snake species and will ensure your home is properly sealed to prevent future invasions.

Preventing Future Snake Encounters

Seal Cracks and Gaps: Use caulk or steel wool to fill foundation cracks, holes near plumbing, and any exterior gaps.

Control Pests: Snakes often follow their food. Keeping mice and insects out will also help keep snakes away.

Reduce Outdoor Habitat: Clear away piles of wood, leaves, and debris near your foundation.

Install Door Sweeps: Ensure all basement doors, especially walkouts, have tight-fitting door sweeps.

Need Help?

Wildlife X Team of SE Michigan offers expert snake removal and prevention services for homes and businesses across the region. Whether you're dealing with a single unwelcome visitor or an ongoing issue, we’re here to help you reclaim your space—snake-free and stress-free.