Few household pests cause panic quite like a house centipede. With their long legs, lightning-fast movement, and sudden nighttime appearances, they can turn a calm evening into an uncomfortable surprise.

The good news? House centipedes are preventable.

If you’ve seen one crawling across your bathroom floor or darting into a crack in the basement, don’t worry. In this complete guide, you’ll learn:

• Why house centipedes come indoors

• Whether they are dangerous

• How to get rid of them naturally

• When to use insecticides

• And most importantly — how to prevent them from coming back

Let’s take control of the situation.

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What Are House Centipedes?

House centipedes are arthropods belonging to the class Chilopoda. There are over 8,000 species of centipedes worldwide, but the most common indoor species is the house centipede (Scutigera coleoptrata).

They have:

• Long, flattened bodies

• 15 pairs of legs

• Yellowish-gray coloring with darker stripes

• Long antennae

• Extremely fast movement

Their speed and appearance are what make them so unsettling — not necessarily their danger level.

Are House Centipedes Dangerous?

This is one of the most common questions homeowners ask.

Do They Bite?

Yes, house centipedes can bite — but it’s rare.

They typically bite only if:

• They feel threatened

• They are handled

• They are trapped against skin

When a centipede bites, it injects venom into its prey. That venom is strong enough to kill small insects like roaches and spiders.

In humans, however, a bite usually causes:

• Mild redness

• Short-term pain

• Minor swelling

In rare cases, someone may experience an allergic reaction. If symptoms worsen or you notice severe swelling, seek medical attention.

For most people, house centipedes are more frightening than harmful.

Why Are House Centipedes in My Home?

If you see one indoors, it means one of two things:

1. They found an entry point.

2. Your home provides food and moisture.

Centipedes enter homes because they are searching for:

• Moisture

• Shelter

• Food (other insects)

They often hide in:

• Basements

• Bathrooms

• Crawl spaces

• Closets

• Under sinks

• Around drains

If you are seeing centipedes, you may also have other insect activity — because centipedes feed on:

• Roaches

• Spiders

• Ants

• Silverfish

• Termites

In a strange way, their presence can signal a larger pest issue.

The Life Cycle of a House Centipede

Understanding their lifecycle helps with prevention.

House centipedes go through three main stages:

1. Egg – Females lay eggs in damp, hidden areas.

2. Nymph – After hatching, young centipedes resemble smaller adults.

3. Adult – They go through multiple molts before reaching full maturity.

House centipedes can live up to 6 years, which means prevention is important to avoid long-term issues.

How to Get Rid of House Centipedes Naturally

If you prefer non-chemical methods first, start here.

1. Seal All Entry Points

Centipedes enter through:

• Cracks in foundations

• Gaps around doors

• Window frame openings

• Utility pipe openings

• Torn screens

Use:

• Silicone caulk

• Weather stripping

• Door sweeps

• Expanding foam for larger gaps

Inspect the exterior of your home carefully, especially where pipes and electrical lines enter.

2. Eliminate Excess Moisture

Centipedes are highly attracted to humidity.

To reduce moisture:

• Fix leaking pipes

• Repair dripping faucets

• Use a dehumidifier in basements

• Run bathroom exhaust fans

• Improve crawlspace ventilation

A dry home is far less attractive to centipedes.

3. Remove Their Food Source

Since centipedes feed on other insects, controlling those pests will naturally discourage them.

Focus on eliminating:

• Roaches

• Ants

• Silverfish

• Spiders

The fewer insects you have, the less reason centipedes have to stay.

4. Use a High-Powered Vacuum

If you see centipedes regularly, vacuum:

• Baseboards

• Corners

• Under appliances

• Behind toilets

• Along wall edges

This removes eggs and reduces hiding spots.

5. Apply Food-Grade Diatomaceous Earth

Diatomaceous earth (DE) is a natural powder made from fossilized algae.

When centipedes crawl through it:

• It damages their exoskeleton

• Causes dehydration

• Leads to elimination

Apply thin layers in:

• Cracks

• Door thresholds

• Basement edges

• Under sinks

Important:

• Use food-grade DE only

• Keep it dry

• Reapply after moisture exposure

6. Treat Drains Carefully

Some homeowners pour vinegar or diluted bleach into drains to reduce insect activity.

If using this method:

• Never mix chemicals

• Use proper ventilation

• Follow safety guidelines

Drains can be entry points if there is high moisture and organic buildup.

How to Control House Centipedes With Insecticides

If natural methods are not enough, insecticides can provide stronger control.

Before applying any product:

• Properly identify the pest

• Read the label carefully

• Follow all safety instructions

Where to Apply Indoor Insecticides

For best results, treat:

• Along baseboards

• Around doors and windows

• Under sinks

• Inside closets

• Around drains

• In cracks and crevices

Dust formulations work well in wall voids and tight spaces.

Outdoor Barrier Treatment (Highly Effective)

Applying a liquid insecticide around the foundation can prevent entry.

Treat:

• 3 feet up the foundation

• 3 feet out from the base

• Around doors and windows

• Around vents and pipe openings

Reapply every 30–60 days, or as directed by the product label.

Recommended Insecticides for Centipede Control

Many products can help reduce centipede activity. Two popular options include:

Ortho® Home Defense® Insect Killer for Cracks & Crevices

• Ideal for tight indoor spaces

• Long residual control

• Easy precision application

Best for spot treatments indoors.

Ortho® Home Defense® Indoor & Perimeter

• Creates a protective barrier

• Kills on contact

• Helps control other insects centipedes feed on

Best for preventative protection around your home.

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When choosing a product, always select one labeled for centipedes and follow directions carefully.

How to Prevent House Centipedes Long-Term

Prevention is the key to avoiding future surprises.

Reduce Outdoor Hiding Areas

Centipedes often live outdoors before entering your home.

Remove:

• Piles of leaves

• Grass clippings

• Mulch near foundations

• Stacked firewood

Store firewood on a raised platform and inspect each piece before bringing it indoors.

Declutter Indoors

Centipedes hide in clutter for protection.

Keep:

• Basements organized

• Crawlspaces clear

• Closets tidy

• Storage boxes elevated

The fewer hiding spots available, the less attractive your home becomes.

Inspect Items Before Bringing Them Inside

Centipedes sometimes hitchhike indoors on:

• Potted plants

• Firewood

• Yard sale furniture

• Cardboard boxes

Inspect carefully before bringing items inside.

Signs You May Have a Centipede Problem

Seeing one occasionally is common. But repeated sightings may indicate a bigger issue.

Watch for:

• Frequent nighttime activity

• Increased moisture in certain rooms

• Presence of other insects

• Sightings in basements or bathrooms

If activity continues despite prevention efforts, professional pest control may be necessary.

When to Call a Professional

Consider calling a licensed pest control company if:

• You see multiple centipedes regularly

• Natural and chemical treatments fail

• You suspect a larger insect infestation

• You’re uncomfortable applying insecticides

Professionals can identify root causes and apply targeted treatments safely.

Frequently Asked Questions

Do house centipedes come up through drains?

Yes, especially if drains are damp or have organic buildup.

Are house centipedes good to have?

They help control other insects, but most homeowners prefer not to see them indoors.

What smells keep centipedes away?

Centipedes dislike strong scents like peppermint and tea tree oil, but moisture control is more effective long-term.

How long do house centipedes live?

They can live up to 6 years.

Do centipedes lay eggs indoors?

Yes, in damp hidden areas.

Does bleach kill centipedes?

Bleach may kill on contact but is not a long-term prevention solution.

Why are centipedes in my bathroom?

Bathrooms provide moisture, which attracts them.

Can centipedes climb walls?

Yes. They can climb smooth surfaces easily.

Conclusion

House centipedes may look alarming, but they are manageable with the right strategy.

To prevent house centipedes:

• Reduce moisture

• Seal entry points

• Eliminate other insects

• Declutter storage areas

• Apply preventative treatments when necessary

With consistent effort and proper prevention, you can create a home environment that centipedes simply don’t want to enter.

If DIY methods aren’t enough, don’t hesitate to contact a professional for assistance.

With the right approach, you can turn your home into a centipede-free zone — and enjoy peace of mind once again.