What to Look for When Buying a Home: A Philadelphia Buyer’s Guide to Home Showings

If you’re getting ready for your first home showing, there’s a good chance you’re not totally sure what you should be paying attention to once you walk through the door. If you’re still figuring out how showings actually work, this guide on what to expect at your first home showing will walk you through it.

Most first-time buyers go in expecting to get a feel for the house, how it looks, how it’s laid out, and whether they can picture themselves living there. That’s part of it. But what catches a lot of people off guard is how easy it is to focus on those surface-level details and miss the things that actually matter long-term.

Because the reality is, the most important parts of a home usually aren’t the ones that jump out at you. And if you don’t know what to look for, it’s easy to walk right past issues that can cost $10,000, $20,000, or more after closing. By the time those show up during inspection, you’re often already emotionally (and sometimes financially) committed.

At Premier Home Team, we’ve guided hundreds of buyers through their first showings across Philadelphia and the surrounding counties. One of the biggest things we help people do early on is shift their focus away from just how a home looks, and toward how it actually functions.

That starts with understanding what we call the Big Five: the five parts of a home that tend to be the most expensive to repair or replace:

• Plumbing and sewer lines
• HVAC (heating and cooling systems)
• Electrical systems
• Roof condition and lifespan
• Windows and energy efficiency

In this guide, we’ll walk you through how to spot potential issues with each of these during a showing, along with a few hidden costs to keep an eye out for, and just as importantly, what you don’t need to worry about.

What Happens at a Home Showing, And What Most First-Time Buyers Miss

When you walk into your first home showing, it’s easy to feel like you’re there to get a general impression of the space and decide if it feels right.

But the most valuable part of a showing isn’t just how the home looks. It’s your opportunity to start identifying what could become a problem later, before you ever get to the inspection stage.

This is where most first-time buyers get tripped up. It’s easy to focus on the things that stand out right away. Paint colors, flooring and finishes grab your attention. But those are all cosmetic. 

A coat of paint costs a few hundred dollars. 

A failed sewer line can cost $20,000.

The most important parts of any home are the ones you can’t easily see, and the best place to start looking is the basement, because that’s where the major operating systems live.  It’s also where an experienced eye can save you from a very expensive surprise.

So instead of trying to take in everything at once, it helps to focus on a few key areas that have the biggest impact on what a home will actually cost you.

This is exactly the kind of thing we help buyers track with our Home Showing Kit, so you’re not trying to remember everything after the fact.

Home Showing Checklist: 5 Things to Always Inspect Before Making an Offer

These are what we call the Big Five: the five systems or components that can run into the tens of thousands of dollars to repair or replace. Each one deserves a closer look.

Cost ranges are rough estimates based on common replacement or major repair scenarios in the Greater Philadelphia region. Actual costs can vary significantly depending on the size, age, condition, and layout of the home, along with contractor pricing and material choices.

1. Plumbing and Sewer Line Issues to Watch for in Older Philadelphia Homes

The biggest plumbing concern in older Philadelphia-area homes is the sewer lateral, which is the pipe that runs from the house to the street. If the home was built before the 1950s and the pipe is anything other than PVC (white plastic), you may be looking at cast iron that’s had 70+ years to corrode, crack, or let tree roots in. 

Replacing a sewer lateral can easily run $10,000–$20,000, so it’s worth asking your agent about getting a sewer scope inspection done before you make an offer. 

If the pipes are visible in the basement and they look like metal rather than white plastic, take note of the home’s age before drawing conclusions, but flag it for follow-up.

2. HVAC Systems in Philadelphia Homes: What Type Do You Have and What Does It Cost?

Not all heating systems are created equal. Philadelphia-area homes can have forced air, electric baseboards, or radiators, and each comes with different operating costs. Oil-heated homes will fluctuate more in price, natural gas is more consistent, and electric baseboards tend to drive up your monthly bill. 

In our experience, HVAC replacements are one of the more expensive updates buyers face, often costing thousands to tens of thousands depending on the system.

If you see vents, don’t assume it means central air. Forced air and central AC are two different things.

A quick check: remove the front panel of the furnace or boiler and look inside. A well-maintained system will be relatively clean. A dusty, layered interior is a sign it hasn’t been serviced regularly. 

Annual service records, if available, are a great sign of a conscientious owner.

3. Electrical Red Flags: Outdated Wiring in Older Philadelphia and Main Line Homes

You don’t need to be in the basement to spot electrical red flags. Walk through the living areas and look at the outlets. Two-prong outlets (instead of the standard three-prong) are a sign of ungrounded wiring.  It’s not an immediate danger, but it’s not up to modern safety standards either.

In the basement, look at the main electrical panel. The biggest red flag is knob-and-tube wiring, an early wiring system that most insurance companies won’t cover and that poses real safety risks. If it’s present, it typically needs to be replaced before move-in. 

A full rewire on a smaller home can run $8,000; on a larger home, it can climb to $20,000 or more.

4. How to Tell If a Roof Needs Replacing Before You Make an Offer

Sellers don’t always know how old their roof is, and even when they say they do, it’s worth verifying. Leaks on a top floor are a stronger indicator of roofing problems than leaks on the first floor, which usually point to plumbing. 

Different materials have different lifespans. Flat asphalt roofs last about 12–15 years and need a reflective coating every 4–5 years.  Asphalt shingle roofs can last 20–25 years with minimal maintenance. 

Flat roof replacement can start around $6,000; shingle roofs can start around $15,000 and go up significantly depending on size and material.

Roof issues don’t automatically mean a home is a bad choice, but they are something you want to understand before moving forward.

5. Windows and Energy Loss: What to Check Before You Buy

Windows matter more than most first-time buyers expect, not for how they look, but for how well they hold in heat or cold. Single-pane windows are the least efficient and can drive up your utility bills noticeably. 

Double-pane windows are better, but check the seal. If you see fogging between the two panes that you can’t wipe away from either side, the seal has failed and condensation is forming inside the glass. That’s a sign the insulating value is gone. 

The fix can be as simple as a new seal, or, if the windows are old, full replacement. 

Replacing windows across an entire home can run from tens of thousands to well into six figures, depending on the size of the home.

Hidden Costs Philadelphia Home Buyers Often Miss at Showings

DIY Repairs That Become Expensive Problems After Closing

One of the biggest DIY red flags in any home is yellow spray foam. If you see large amounts of spray foam plugging cracks in the basement walls or around the foundation, someone tried to DIY a problem that required a real fix, and that can often cost thousands to correct properly. 

Spray foam isn’t meant to be removed, and if someone was this visible about cutting corners, it raises the question of what else they fixed the wrong way in places you can’t see.

How to Tell a Cosmetically Flipped Home from a Well-Maintained One

A well-maintained home usually still has some of the owner’s belongings, service records on the HVAC or boiler, and a certain lived-in cleanliness. A flipped home can look great on first glance but falls apart in the details. 

One reliable way to tell is to check the hinges on cabinet doors and interior doors. Sloppy paint on hinges is a sign someone moved fast, not carefully. The detailed work in a flip often reflects the overall quality of the renovation.

That doesn’t mean flips are bad purchases, it just means you need to look deeper. Think of everything you don’t like as a number, not a problem. How much would it cost to fix? Does the math still work at the asking price?

What NOT to Worry About When Buying a Home in Philadelphia

First-time buyers often panic about things that are easy and relatively inexpensive to fix. Flooring is a common one; whether it’s carpet that needs replacing, LVP with bubbles, or hardwood that needs refinishing, these are all DIY-friendly or affordable professional fixes. Paint colors, wallpaper, and dated fixtures fall into the same category.

Uneven or “slanted” floors can look alarming, but often the culprit is just flooring that was installed incorrectly, not a structural problem underneath. A slant in LVP doesn’t mean the subfloor is failing, it might just mean someone didn’t prep the surface before laying it.

The same logic applies to what might look like structural issues. Cracks in a basement wall can send a first-time buyer into a panic, but context matters.

Structural issues are relatively rare, but they’re also hard to hide. When walking through a basement or crawlspace, look at the walls closely. Small hairline cracks from normal settling are common and not usually a concern. What you’re watching for are cracks wider than a quarter inch, and especially any horizontal cracks. Vertical cracks are often just the house settling over time. Horizontal cracks, running side to side, are a sign of a more serious structural issue and should be flagged immediately.

The goal isn’t to find a perfect house. It’s to understand what you’re actually buying. There is no such thing as a problem that can’t be fixed, it’s just a matter of how much you want to spend to fix it.

What a Philadelphia Real Estate Agent Should Point Out at Every Showing

What Premier Home Team Looks for That Most Agents Skip

A lot of agents will walk through a home with you and talk about the layout or the neighborhood. We do that too, but we also make a point of understanding where you are in the process before we walk through the first door. 

If you’ve never owned a home, we want to make sure you know what makes a house actually function: the systems, the maintenance costs, and the long-term picture of ownership. We don’t want anyone putting themselves in a position where they’re house-rich and cash-poor because no one walked them through what the house would actually cost them.

How We Help First-Time Home Buyers Evaluate Homes in Philadelphia, PA

After a showing, we work to give you the full picture. What’s right with the home? What’s wrong with it?  We’ll never tell you whether to buy or not; that’s your call. But we’ll make sure you can see the numbers clearly so you can make the best decision for you and your family.

We also track what you do and don’t like as we go. If you walk out of a showing and say you hated the vinyl siding, we cross vinyl siding off the list. The more we learn about what matters to you, the less time you spend driving across the Philadelphia suburbs to see houses that were never right for you in the first place.

Your Next Step

Walking into a home without knowing what to look for is how buyers end up surprised after closing. Now you know the Big Five: plumbing, HVAC, electrical, roof, and windows, what each one costs when it goes wrong, and how to tell the difference between a red flag and a cosmetic fix.

If you're buying a home in Philadelphia or the surrounding counties, you shouldn't have to figure this out alone. At Premier Home Team, we walk every showing with our clients the same way, with a focus on the systems first, the numbers behind them, and with your long-term budget and goals in mind.

Your next step is to download our Home Showing Kit so you can keep track of the Big Five and everything else you’re noticing during a showing, without trying to remember it all later.

If you’re just getting started, you can also schedule a free buyer consultation with our team.