How to Check an Apartment for Bedbugs Before You Sign

By Mayank Yadav · Editor

July 26, 2026 7 min read 1,453 words

A bedbug problem is far easier to avoid than to end. Once an infestation is established in a unit, treatment can take weeks, cost real money, and involve throwing out furniture you liked. That is why the smartest moment to deal with bedbugs is before you sign anything, when your only cost is twenty careful minutes and a flashlight. This is not about paranoia. Most apartments you look at will be fine. It is about knowing what to look for so that the rare bad unit does not quietly become your problem.

An empty unit is not automatically a clean unit

Bedbugs do not need you to be present to survive. They can go weeks, and often months, without a blood meal, waiting in a crack or seam until someone moves in. So an apartment that has sat empty between tenants is not proof of anything on its own. Bedbugs also travel. In a multi-unit building they move through wall voids, along baseboards, and through the small gaps around pipes and outlets, which means a unit can pick up a problem from a neighbor it never shared a tenant with.

One myth is worth dropping right away: bedbugs have nothing to do with cleanliness. They are found in tidy homes and messy ones, expensive buildings and cheap ones. They feed on people, not on crumbs, so a spotless unit can still have them and a cluttered one may not. A swept, freshly painted room is not telling you the whole story, which is why you look with your own eyes.

A close-up of a mattress seam and piping, one of the spots where bedbugs and their traces commonly hide.

What a bedbug actually looks like

An adult bedbug is about the size and color of an apple seed: flat, oval, and reddish brown. After feeding it looks rounder and darker. Young bedbugs, called nymphs, are smaller and paler, sometimes almost translucent, which makes them easy to miss. The eggs are tiny, roughly a millimeter, pale, and often stuck in small clusters along a seam or crack.

You will not always see a live bug, because they hide during the day and come out to feed at night. That is why experienced inspectors look for the traces bedbugs leave behind more than the insects themselves. Learn those traces, and you can read a room even when nothing is moving.

The tools worth bringing to a viewing

None of this requires special equipment. Bring:

A bright flashlight, or your phone light, since these bugs live in shadowed cracks.
An old card, like an expired gift card, to run along seams and drag hidden bugs into view.
Your phone camera, to photograph anything suspicious for a closer look later.
A pair of disposable gloves if you would feel better handling seams and outlet covers.

That is the whole kit. A viewing is short, so knowing exactly where to point the light matters more than any gadget.

Where to look first

Bedbugs stay close to where people sleep and rest, so concentrate your attention there even in an empty unit. Work through:

Baseboards and the gaps where they meet the floor, especially in the bedroom.
The edges of carpet, along the tack strip, and any loose or lifting corners.
Electrical outlet and light switch covers, which hide the cracks bugs use to pass between walls.
Window and door frames, and the crevices tucked behind them.
Closet corners, shelf brackets, and any built-in drawers.
Any furniture the unit came with, particularly upholstered pieces, along every seam and under every cushion.

Run your light slowly. Bedbug evidence is small, and it hides in exactly the places a casual glance skips.

The stains and shells that give it away

Because live bugs are shy, the reliable signs are the ones they leave behind:

Fecal spots: tiny dark brown or black dots, sometimes smeared, that look like someone touched the surface with a fine marker. They cluster along seams, in corners, and around hiding spots.
Shed skins: pale, empty shells that nymphs leave behind as they grow. Finding several suggests a population that has been feeding and maturing.
Eggs and eggshells: the small pale specks described earlier, usually wedged into a crack.
Blood spots: small rust-colored marks, more common on bedding than on bare surfaces, so more relevant if furniture is present.

In heavier infestations some people notice a sweet, musty smell, though this is not reliable and you should not count on it. If you find a cluster of dark spots and shed skins along a baseboard or a mattress seam, treat that as a real finding, not a maybe.

A shared apartment hallway with numbered doors, where a bedbug problem can travel between units.

Reading the building, not just the unit

The unit is only half the picture, especially in an apartment. Walk the common areas with the same attention you would bring to your own move-in walkthrough. In hallways and near the trash area, look for discarded mattresses or furniture wrapped in plastic, which can signal a recent problem somewhere in the building. Notice any out-of-service signs, or the faint chemical smell of a recent treatment.

A building that shares walls, laundry rooms, and trash chutes simply gives bedbugs more ways to move, so a problem two floors up can eventually become a problem in your unit. Understanding how pest control in a shared building actually works helps here, because treatment in one apartment often means little if the neighboring units are not handled too. None of this makes a large building a bad bet. It means you are gathering context, the same way you would notice patterns anywhere you are about to live.

Questions worth asking the landlord

Ask directly, and ask early. Reasonable questions include whether the unit or building has been treated for bedbugs, when the most recent treatment was, and whether you can see a pest control record. A landlord who answers plainly is a good sign. One who gets defensive or vague is worth noting.

Be aware that disclosure rules vary widely by location. Some states and cities require landlords to disclose a recent bedbug history, and a few maintain other tenant protections around pests, while many places require nothing at all. Do not assume you are entitled to a disclosure, and do not assume silence means there is nothing to disclose. Check your local tenant laws, and read anything the lease says about pests before you rely on it.

If you find something, slow down

Finding a sign or two does not always mean you should walk away, and it does not mean you should sign as if nothing happened. Slow down instead. If the unit is otherwise right for you, you have leverage before signing that you will never have again afterward. Ask, in writing, for a professional inspection and treatment before your move-in date, and ask for that commitment to appear in the lease or an addendum rather than as a verbal promise.

If the landlord refuses to acknowledge a clear problem, that refusal tells you how future repair issues will likely go. Whether bedbugs become the landlord’s responsibility or yours after you move in depends heavily on local law and lease language, and it is often contested, so getting the unit verified clean before you sign is far simpler than arguing about fault later.

Protecting your move even when the unit looks clear

A clean inspection is good news, not a guarantee, so protect the move itself. Zip mattress and box spring encasements onto your beds; they trap anything that tries to hide there and make future checks trivial. Be especially careful with secondhand furniture, which is one of the most common ways bedbugs travel into a home. Inspect every seam of a used couch or frame before it comes through your door. And if you are moving out of a building that had any pest history, take care not to carry the problem with you.

These habits cost little, and they close the gap between a good inspection and a genuinely fresh start.

The honest limits of a pre-signing check

A twenty-minute inspection cannot promise a bedbug-free apartment. These insects are very good at hiding, populations can be tiny and deep inside a wall, and no visual check catches everything. What a careful look does do is catch active, established infestations, the ones that would otherwise become an expensive surprise in your first month.

Treat the inspection as one strong layer, not a certainty. Combine it with good questions, attention to the building, and sensible move-in habits, and you have done everything a reasonable renter can do to keep bedbugs from becoming your story. The most valuable thing this check gives you is not certainty at all. It is leverage, and a written record, while you still hold the one power you lose the moment you sign: the power to say no.

Frequently asked

Can an apartment have bedbugs even if it has been empty for months?

Yes. Bedbugs can survive weeks or months without feeding, waiting in cracks and seams for a new occupant. An empty, freshly cleaned unit is not proof it is free of them, which is why a visual check still matters.

What is the clearest sign of bedbugs during a viewing?

Clusters of tiny dark fecal spots along seams, baseboards, and corners, often alongside pale shed skins. Live bugs hide during the day, so these traces are usually more visible and more reliable than seeing an insect itself.

Should I refuse to sign if I find one sign of bedbugs?

Not necessarily. Before signing you have real leverage. Ask in writing for a professional inspection and treatment, and get that promise into the lease. Only walk away if the landlord denies a clear, obvious problem.

Is the landlord or the tenant responsible for bedbugs?

It depends heavily on your location and lease. Some places treat it as the landlord's duty, especially in multi-unit buildings, while others assign blame based on who introduced them. Check your local tenant laws and lease language.

How can I avoid bringing bedbugs into a clean apartment?

Use zippered mattress and box spring encasements, and inspect every seam of secondhand furniture before it comes inside. Used couches and frames are among the most common ways bedbugs travel into a new home.

Written by

Mayank Yadav

Editor Writing since 2026

Mayank Yadav edits Neighbor Nest Hub. He writes about the day-to-day side of apartment and shared-building life: leases, deposits, sound through shared walls, laundry rooms, courtyards, and the small conversations that keep a hallway feeling considerate. Guides are researched from public sources and edited for what a reader can actually use the moment they finish reading.

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