Real estate professionals are shedding light on the subtle warning signs to watch for when purchasing a property.

For many people, purchasing a house, condo, or apartment represents their most significant financial commitment. For first-time buyers, the entire experience can feel both daunting and overwhelming, often causing them to miss key signs or be unsure about what to pay attention to during home viewings.

I recently came across an interesting Reddit thread from a few years ago, where a user asked: 'Real estate experts on Reddit, what are some subtle warning signs to look for when buying a house?'

The thread garnered thousands of replies, not only from real estate agents but also from homeowners who shared valuable lessons learned through personal experience. Here are the most frequently mentioned and noteworthy comments:

1. 'New paint, fresh carpet, but no other updates? It's the classic realtor remodel trick — designed to impress you during a quick walk-through. Focus on inspecting the tiles, trim, and foundation to get a true sense of the house's condition. And if you're unfamiliar with the neighborhood, always drive through it at night.'

2. 'Attend showings during heavy rain and then inspect the basement. This will reveal any foundation water problems that even someone like me could easily spot. I once visited a house where a cable was running into the basement from the outside at ground level, and it wasn’t properly sealed — as a result, water poured over the circuit breaker box and onto the basement floor. I passed on that property.'

3. 'Take a walk or bike ride through the neighborhood; you'll gain far more insight than just driving through it.'

4. 'As a realtor, my advice: grading is crucial. Specifically, the slope of the ground around the foundation of the home. If it slopes toward the house, it means rainwater will flow directly to the foundation, which can lead to serious problems. Be especially cautious with sloped concrete surfaces like driveways — that typically means costly fixes like mudjacking or jackhammering. When you're inspecting a home, always start with a walk around the perimeter. It could save you a significant amount of money and prevent future foundation issues.'

5. 'Tap the walls, and if you hear movement — especially in an older home — it’s a sign the plaster is in poor condition. At best, it will make it difficult to hang anything on the walls. At worst, you'll get the open-concept dream layout you’ve always wanted (or nightmare, depending on how you see it).'

6. 'Pizza delivery blacklists.'

7. 'As a realtor, here’s a practical tip: you'll almost always need more storage. It’s easy to overlook while focusing on the kitchen and bathrooms. Be sure to check the kitchen's cabinet space. Also, observe how the sellers maintain the temperature in the house. A cool home in the summer is a blessing when it's 100°F outside. Watch out for poorly done DIY projects too. While they may be purely cosmetic, if you spot electrical or plumbing work that looks off, make sure your inspector takes a closer look before you proceed with the house.'

8. 'As a construction professional, I urge you to please, please, PLEASE check the attic. Many buyers never inspect the actual air conditioning system. If you go up there and smell something burnt, or spot large silvery tubes that seem crushed, those are red flags. If you detect any strong odors, don’t buy. No one buys $80 worth of air fresheners unless they’re hiding something.'

9. 'If you step into a house and are immediately hit by the scent of Febreze or air fresheners... get ready for it to probably smell like dogs or smoke once that fragrance fades. Keep in mind that many agents like to burn candles with pleasant scents or bake cookies right before an open house, so this isn’t always a deal-breaker. However, you should be cautious if this happens during a private viewing.'

10. 'My grandfather was a real estate agent for many years. The first two things he always checked were the roof and the furnace. If either seemed too old or looked like they might need replacing soon, it was something to consider. Most first-time buyers can't afford to replace these early on, and many older homeowners would prefer to avoid the cost as well.'

11. 'If you notice sellers hanging things on the walls in odd places, places where no one would normally put them, it could be because they are hiding damage from a long-term termite problem. I know this firsthand because I once bought a house where the sellers had things hanging in odd spots to cover up the damage from a decade-long termite infestation.'

12. 'Before I even visit a house, I always check the MLS. In my area, homes typically stay on the market for about 17 days. Some will sell in under 10 days, and others may take 23 days. But once a listing hits 30 days or more, it raises a huge red flag for me. There are various reasons a home might linger, such as poor condition, overpricing by the seller, or an ineffective real estate agent. But once it surpasses 30 days, I get more cautious.'

13. 'Check the bottom cabinets in the kitchen and take a sniff. This can tell you a lot about rodent issues, as the air in these areas tends to be 'older' and isn't usually influenced by air fresheners. If you smell bleach, that's a clear warning sign. Also, take a look at the fuse or breaker box to see if one trips often. And be suspicious of vents that have been recently cleaned — that can be a sign of hidden mold.'

14. 'If you're prevented from seeing a certain room, attic, basement, or any other area with some excuse, be cautious.'

15. 'If you're house hunting in winter and notice a lot of icicles on the roof while the rest of the neighborhood is icicle-free, it probably means the house isn't well-insulated.'

16. 'If you're considering buying a house or condo from a development where all the homes were built by the same builder, take a moment to knock on the neighbor's door and ask if they've encountered any issues. This is especially important with new constructions.'

17. "Did the homeowners take the time to clean before the showing? If you step into a house that’s dirty, it’s a sign that the sellers may be neglecting essential maintenance on things like appliances, the yard, and more. If they're willing to let their place look this way, imagine what other issues they're overlooking."

18. "If the entire bathroom, including the ceiling, is tiled, there may be an attempt to conceal mold problems. Be sure to have the inspector verify that the bathroom fan is properly venting to the outside."

19. "Be sure to check all appliances that will remain with the house. This includes the ice maker, dishwasher, microwave, garbage disposal, stove, washer/dryer, etc. Additionally, when attending initial showings, make sure the house doesn't have any overpowering odors (pets, cigarettes, etc.). My boyfriend and I are both realtors, and you'd be shocked at how many people genuinely think bad smells can just be aired out. I've seen plenty of clients have to replace all the floors in their new home because of animal urine."

20. And lastly, "For the love of all that's holy, make sure to check your cellphone signal in the house. I just moved into a new place, and I can barely get one bar on the second floor unless I stand on a chair. Turns out there’s only one cell tower servicing the entire neighborhood of over 200 houses, and because it's near a neighborhood of multimillion-dollar homes, they can't get approval to add another one. So, I'm stuck with bad service."