Fleas in Your House With No Pets? Here Is Why — and How to Fix It

Published April 7, 2026 · Extermination DMP

You wake up with itchy red bites around your ankles. Your first thought is bed bugs. But the bites are lower — feet, ankles, lower legs. And you do not have any pets.

You have fleas. And yes, it is possible without pets.

How Fleas Get Into a Pet-Free Home

Previous Tenants Had Pets

This is the most common scenario in Montreal. You moved into an apartment where the previous tenant had a cat or dog. Flea pupae (cocoons) can survive in carpet fibers and floor cracks for up to 12 months without a host. When you moved in, the vibrations, warmth, and CO2 from your presence triggered the dormant pupae to hatch.

The previous tenant may not have even known they had a flea problem — pets develop tolerance to flea bites while the fleas reproduce happily.

Wildlife Under Your Building

Raccoons, skunks, groundhogs, and feral cats living under your deck, porch, or building carry fleas. Those fleas can migrate indoors through floor cracks, crawl spaces, and basement access points. If you have wildlife denning under your building, you may also have fleas — even without pets.

Visiting Animals

A friend's dog visited for an afternoon. Your neighbor's cat wanders into your apartment occasionally. A stray cat sleeps on your porch. Any brief animal contact can introduce fleas that then reproduce in your carpets and furniture.

Second-Hand Furniture

Used couches, rugs, and upholstered furniture can harbor flea eggs and pupae. That vintage armchair from the marketplace listing may have come with uninvited guests.

Confirming You Have Fleas (Not Bed Bugs)

| | Fleas | Bed Bugs | |---|---|---| | Bite location | Ankles, feet, lower legs | Arms, shoulders, neck, face | | Bite pattern | Random clusters | Lines or rows | | When bitten | Anytime, especially when standing on carpet | During sleep | | See the insect? | Tiny, dark, jumping | Flat, oval, reddish-brown, crawling | | Where they hide | Carpet fibers, pet bedding, upholstered furniture | Mattress seams, bed frame, baseboards |

The jump test: Fleas jump. Bed bugs do not. If you see a tiny dark insect that jumps away when you try to catch it — fleas. The white sock test: Walk through your carpeted rooms wearing white socks. After a few minutes, check the socks. If you see tiny dark specks clinging to the fabric — fleas.

Treatment for a Pet-Free Home

Step 1: Thorough Vacuuming

Vacuum every carpeted surface, every rug, and every upholstered piece of furniture. Focus on:

Along baseboards and carpet edges
Under furniture
Between couch cushions
Closet floors

Vacuuming does two things: it physically removes adult fleas, eggs, and larvae, and the vibrations trigger dormant pupae to hatch — making them vulnerable to treatment.

Vacuum daily for 2 weeks. Dispose of the vacuum bag or empty the canister into a sealed bag after each session.

Step 2: Wash Everything Possible

All bedding on hot cycle
Throw rugs and bath mats
Cushion covers if removable
Any fabric that contacts the floor

Step 3: Professional Treatment

For a pet-free home with a flea infestation from a previous tenant or wildlife, professional treatment is recommended. A technician will apply a residual insecticide with an insect growth regulator (IGR) that prevents flea eggs and larvae from developing into adults.

One treatment plus consistent vacuuming typically resolves the issue within 2-4 weeks. A follow-up treatment may be needed if the infestation was severe.

Step 4: Address the Source

If previous tenant's pets caused it: treatment of the unit resolves it permanently
If wildlife under the building caused it: the wildlife issue must be resolved or fleas will reoccur
If second-hand furniture caused it: treatment of the furniture (or disposal) plus room treatment

Frequently Asked Questions

How long can fleas survive without a pet in the house?

Adult fleas die within 1-2 weeks without a blood meal. But flea pupae in cocoons can survive up to 12 months in dormancy, hatching when they detect vibrations, warmth, and CO2 from a new host. This is why empty apartments can suddenly produce fleas when a new tenant moves in.

Can I get fleas from my neighbor's pet in an apartment building?

It is uncommon but possible. Fleas do not typically travel between apartment units like bed bugs do. However, if a heavily infested pet walks through a shared hallway, fleas can drop off and be tracked into your unit on shoes or clothing.

Got a pest problem?

Extermination DMP serves Montreal, the South Shore, Laval & the West Island — 24/7.

Call 438-879-5706