Home flippers buy dilapidated houses, fix them up, then sell them again as quickly as possible with the intention of making a tidy profit. Flipped houses look shiny and new inside, but what's going on underneath all the new drywall, carpet, and paint? Very few home buyers seem to trust flippers, and with the cheesy 'repairs' or 'cover-ups' I've seen over the years, it's easy to understand why. Most of the quick and dirty home flippers take the same shortcuts when flipping houses; I've seen so many of them done the same way that I'm going to tell you all about the flipped house you just looked at without even knowing the address.
Interior
The interior of the home looks great. The kitchen has all new or re-painted cabinets, stainless steel appliances, granite counter tops, and a tiled floor. The first floor bathroom has been completely re-done, and a second floor bathroom was recently added, or possibly a basement bathroom. They look great. All new carpet, paint, light fixtures, outlets, and switches throughout the house. Possibly all new windows as well.
When looking at flipped houses, you might notice poorly designed kitchens (ie - cabinet doors / drawers that are blocked by other cabinets), nail holes that aren't filled, appliances installed without an outlet to plug them in to, and loose / unsecured countertops or base cabinets. Bathrooms will often have vanity cabinets that are way too small for the space because the flipper bought the 'special buy' vanity, top, and faucet combo on sale at whatever home improvement store was close.
The handrails are new, but they might come right out of the wall if you pull on them. I've found a few handrails at flipped houses that were only attached to drywall.
Electrical
There is a brand new circuit breaker panel installed in the basement, which replaced the old 60-amp fuse panel. The new panel has a state electrical inspection sticker on it, and everything looks great. I don't find many electrical problems on flipped houses. Even the worst home flippers usually know better than to mess with the electrical; they don't want their houses to burn down.
Heating
The home has an old, unsafe heating system at the end of it's life expectancy. The flipper has documentation from 'their guy', some heating contractor that you've never heard of, saying the heating system is safe. You should be suspicious. I've found heating safety check forms filled out that weren't worth the paper they were written on. I've found furnaces and boilers creating high levels of carbon monoxide that the heating contractors said were fine. In one particular case, the home flipper claimed my equipment was faulty; we argued for a while, and eventually the flipper had the gas company come out to do their own test. The gas company promptly red-tagged the heating plant and shut it down.
Another possibility is that the heating system was completely replaced. If so, great, but check the furnace's blower fan for drywall dust. There's a good chance that the flipper had the blower fan running while they were doing their drywall sanding, and the interior of the furnace is completely caked in drywall dust. The photo below shows a close-up view of a furnace's blower fan blades covered in a thick layer of drywall dust.
If the home was originally heated with a boiler, the home flipper most likely pulled out all of the pipes and radiators and converted the system to forced air; this is usually far less expensive than repairing or replacing the existing system.