10 Warning Signs That Someone Incompetent (or Unethical) Is Flipping a House

Credit: Mouaad Jaaidi / Shutterstock.com

If you’re in the market for a new home, there’s a pretty good chance you've toured a few “flipped” houses—properties that were recently purchased, quickly renovated, and just as quickly put back on the market. Even amid the current real estate crunch, house flipping remains a popular business model: In the first quarter of 2024, 67,817 houses were flipped, which amounted to nearly 9% of all the houses sold during that period.

Flipping is popular because it can be highly profitable, generating an average return of $73,492 per project. But those profits rely on a fast, efficient renovation—and some flippers may get in over their heads and end up cutting corners, while others might simply set out to rip you off by attempting to hide downright shoddy work.

In either scenario, there are some common aspects of any renovation that can clue you in to incompetent or unethical work. When inspecting a house you suspect was a flip, check for these red flags.

Glued-in sinks

Typically, an undermount kitchen sink will be installed using a combination of adhesive and metal clips to hold it in place. Sometimes a sink will be installed with just adhesive if the clips aren’t absolutely necessary and the installer is worried about cracking the countertop or lacks the space to properly attach the clips, but they'll generally use a powerful, professional-grade adhesive regardless.

An unethical house flipper, on the other hand, might use any old silicone-based adhesive to slap a sink into place, skipping the clips simply to save on time and labor costs. The sink will hang on for a while, then fall without warning—probably when it’s full of dirty dishes. When checking out a flipped kitchen, open the cabinet under the sink and look for metal support clips. If you don’t see them, it could be a sign that the flipper either didn’t know what was needed—or intentionally skipped a step.

Ventilation fans that don't vent anywhere

Ventilation and exhaust fans are usually found in bathrooms, over ovens, and in other places where ventilation is required, and they need to be vented outside—but can simply be slapped into the ceiling and wired up, with no outside ventilation connection at all. In other words, they’ll vent the steam from your shower into your ceiling, where it can slowly foster mold and damage your home's wood framing. It’s worth checking that any exhaust fans are vented properly, and not just run into the cavities behind your drywall.

Painted tubs

If the house being flipped has a unique classic bathtub—or the flipper is looking to save a few bucks on the renovation—they might decide to refinish the tub instead of replacing it. This is fine in theory, as tubs can certainly be refinished and hold up to years of use—provided the job done by a professional. It’s actually not easy to refinish a tub, as they must endure near-constant water exposure. Even a successful DIY refinish job will typically only last a few years.

Refinishing a tub requires it be properly cleaned, etched, and prepped. If the flipper just paints the tub, it might look fine during a walk-through, but it will peel almost immediately once you start using it. In a flipped house, take a very close look at the tubs. Look for fine cracks, spotty coverage around drains and fixtures, and bubbling in the finish. Ask questions if you see any indication of an undisclosed refinishing job.

Updated outlets hiding old wiring

The easiest way to save money on a house flip is to leave all the hidden stuff—the plumbing and electrical—untouched, and just cover it up with new fixtures. An unethical flipper might swap out old, ungrounded outlets with new, modern ones and simply not connect the ground—or, worse, jump the ground to the neutral wire (known as a “bootleg” ground). That can be dangerous, but it won’t trigger an error when the outlet is tested. It’s worth it to unscrew a few outlets and take a quick look at what's going on in the walls—if the outlets are new but the wiring is old, be suspicious, and consider having an electrician come in to take a look during the inspection process.

One trick desperate flippers will try is simply covering up problems with a new floor. Flooring is expensive, and it’s possible to put carpet or vinyl flooring over damaged hardwood, cracking tile, or other problems. Fresh carpet or planks will look good, and you might not spend enough time walking on them to notice deeper problems until well after you've closed. Another trick flippers will sometimes play is to tear off a bad floor and throw a cheap floor over a damaged subfloor in order to save a little time and money.

You can look for a few tells that a cheap new floor is covering up a big old problem:

Varying floor heights. If you’re constantly stepping up and down as you pass from room to room, it could be a sign that old floors were just covered over.

Sags and soft spots. If the new tile is already showing cracks, or if you can feel parts of the floor are soft when you step on them, this could indicate the new flooring was either laid over a damaged floor, or that the subfloor is rotten.

Gaps. If new vinyl planks are separating, it probably means a sub-par installation, and it could also be a sign that the floor under the vinyl is damaged and uneven.

Unexpected carpet. Is there just one room in the house with brand-new carpet or other flooring? Be suspicious, and see if you can get a peek underneath.

Loose trim

When a flip runs out of time, it’s usually the trim work that suffers, because it’s the last step in a remodel. If you walk into a kitchen and notice the toe-kicks are missing, or the house lacks door trim, you’d immediately be worried, so some flippers will stick that trim on in fast, cheap ways—like with double-sided tape, caulk, or any old glue. It will all look fine for a while, but the moisture of a kitchen or bathroom will eventually cause it to just pop off. When looking at a remodeled kitchen in a flipped house, it’s worth it to give the trim a gentle tug. If it was installed properly, there’s no way you should be able to budge it without a lot of effort.

Missing caulk

Similarly, take a close look at the kitchen and bathrooms. Specifically, look for caulk—or a lack of it. Caulk is usually one of the final steps when finishing up a bath or kitchen remodel, and you might not notice it was skipped if you’re not looking for it. Any “change of plane” (where horizontal and vertical surfaces meet) or gaps should be caulked with an appropriate caulk. Otherwise moisture, crumbs, and other debris will get between and inside things, leading to rot, mold, and other problems.

Unconnected HVAC vents

Just like ventilation fans, one way an unethical (or rushing, inexperienced) house flipper might try to skate by is by skipping a crucial step with the home’s central heating and cooling: They might install the vents and returns for the system, and never connect them. Everything looks right, and when you turn on the air conditioning it fires up, but the air never actually gets into your rooms. During your walkthrough or inspection, test the system to ensure the air is flowing.

Poorly placed gutters

If your flipped house has a new roof, pay attention to the placement of the gutters. A flipper DIYing a roof installation or spot-hiring subcontractors instead of going with a reputable roofing company might rush through gutter installation, resulting in situations where gutters drain water against the house or directly onto windows and doors. That’s obviously the exact opposite of the whole purpose of gutters, but the mistake won't jump out at you unless it’s actively raining, so try to tour the house under varying weather conditions.

You can imagine the horror a desperate house flipper experiences when they uncover termite or carpenter ant damage in the house they just bought, and they have no budget for a thorough treatment. Signs of termites and other pests can be easy to hide—often paint is all you need to cover up some light termite damage for a few weeks, which is enough time to get through an inspection—and home inspectors aren’t always thorough, and may not look behind a fresh paint job, or moving heavy furniture to see what might be hidden.

If just one area of the home has been recently painted, take a closer look. If the area under the paint is rough and damaged, it might be an attempt to hide a civilization of critters the flipper didn’t know how to evict. You can also look for insect droppings (some termites leave droppings that look like grains of rice or sesame seeds), sawdust piles, shed skins or eggs—and traps and poisons hiding in cabinets or under appliances.