A home inspection isn’t just about finding problems. It’s about understanding what those problems mean for your investment. Some issues are relatively inexpensive to fix, while others can completely change the economics of a deal.
Whether you’re buying your first rental property or your tenth fix-and-flip, knowing what to look for during a walkthrough can help you identify costly surprises before they become your responsibility.
While traditional homebuyers often include a home inspection contingency in their purchase agreement, many investors compete in markets where inspection contingencies can weaken an offer. Even if that’s the case, you should still inspect the property whenever possible. A thorough walkthrough—ideally with a professional home inspector—can help you identify issues early and make a more informed investment decision.
Below are some of the most important things to look for during your next property inspection. This certainly isn’t an exhaustive list, but it covers many of the common issues that can have a significant impact on your renovation budget or long-term returns.
What to Inspect Before Buying an Investment Property
Before diving into the details, here’s a high-level checklist of the major systems every real estate investor should evaluate:
□ Basement: Foundation, water intrusion, pests, mechanical systems, radon
□ Plumbing: Pipe materials, water pressure, drainage, leaks
□ Electrical: Service panel, amperage, outlets, GFCI protection, exposed wiring
□ HVAC: System age, maintenance history, airflow, ductwork
□ Exterior: Roof, windows, siding, grading, gutters and drainage
□ Well & Septic: Professional inspection and water quality testing (where applicable)
□ Older Home Hazards: Lead-based paint, knob-and-tube wiring, asbestos
Now let’s look at each area in more detail.
Basement
Many of a property’s most expensive problems hide in the basement. Pay close attention to the foundation, signs of moisture, and the condition of the home’s major mechanical systems.
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- Foundation: Look for foundation cracks, bowing walls, or uneven floors. Additional support posts or beams may indicate previous structural concerns or repairs. Foundation issues can range from minor cosmetic repairs to major structural work, so don’t hesitate to ask questions if something doesn’t look right.
- Water Intrusion: Is the basement dry? Look for staining on walls and floors, peeling paint, musty odors, or signs of previous flooding. Persistent moisture can lead to mold growth and may indicate drainage or waterproofing issues.
- Pests: Check the floor joists and exposed wood for termite or other wood-destroying insect damage. Also look for signs of rodents, including droppings, nesting materials, or chewed wiring.
- Mechanical Systems: Check the age and condition of the furnace, water heater, and other mechanical equipment. Verify that everything is operational and note any systems nearing the end of their expected lifespan.
- Radon: Depending on your location, radon gas can present a health risk. If the home has a basement—especially one with finished living space—consider having it professionally tested.
Plumbing
Plumbing problems can be hidden behind walls or underground, making them expensive to discover after closing.
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- Supply Lines: Identify the plumbing materials used throughout the home. Galvanized steel pipes are prone to corrosion and restricted water flow over time. Copper and PEX are generally preferred.
- Water Pressure: Turn on multiple faucets and showers to evaluate water pressure throughout the home.
- Drainage: Observe how quickly sinks, tubs, and showers drain. Slow drains may indicate clogged lines or more significant sewer issues.
- Leaks: Look for active leaks, water stains beneath sinks, damaged ceilings, or other signs of previous plumbing problems.
Electrical
Electrical issues can create safety hazards while also affecting your ability to insure or finance a property.
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- Electrical Service: Does the home still have a fuse box? Many insurance companies are hesitant to insure homes with outdated fuse panels.
- Panel Capacity: Older homes often have 100-amp service, which may not meet the electrical demands of modern households. Upgrading to a 200-amp service can become a necessary expense.
- Outlets: Are the outlets two-prong or three-prong? Two-prong outlets often indicate older wiring. Keep in mind that just because an outlet has three prongs doesn’t necessarily mean it has been properly grounded.
- Safety Features: Check for GFCI outlets in kitchens, bathrooms, garages, and other areas where they’re required. Also watch for exposed wiring, overloaded breaker panels, or signs of amateur electrical work.
HVAC
Replacing heating and cooling equipment can be one of the larger expenses you’ll encounter, so evaluate the system carefully.
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- Service History: Ask whether the current owner has maintenance records. A well-maintained system often lasts longer and performs more efficiently.
- Heating & Cooling: Verify that conditioned air reaches every room in the home. If you’re renovating a property for resale, many lenders require every finished room to have a permanent heat source.
- Filter & Ductwork: Inspect the condition of the air filter and look for damaged, disconnected, or poorly sealed ductwork.
Exterior
The outside of the home often reveals problems that aren’t obvious from inside.
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- Roof: Determine the approximate age and condition of the roof. Asphalt shingle roofs often last 20–25 years, while properly maintained metal roofs can last considerably longer.
- Windows: Open and close windows to ensure they operate properly. Look for signs of water intrusion, failed window seals, or damaged frames. Older single-pane windows are generally less energy efficient than modern double-pane windows.
- Siding: Determine what type of siding the home has and inspect it for cracks, rot, loose panels, or water damage. Regardless of the material, its primary purpose is protecting the structure from moisture.
- Drainage & Grading: Make sure the ground slopes away from the home’s foundation. Poor drainage, clogged gutters, or downspouts that discharge too close to the house can contribute to basement leaks and foundation problems over time.
Well & Septic Systems
If the property is not connected to municipal water and sewer, these systems deserve extra attention.
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- Septic System: Have the septic system inspected by a qualified professional. There are many different types of septic systems, and repairs or replacements can be expensive. We replaced the septic system on one of our fix-and-flip projects a few years ago, and the total cost was approximately $25,000.
- Private Well: If the property uses well water, have the water tested for quality and contaminants. Water that isn’t safe to drink can become a significant obstacle when trying to finance, occupy, or sell the property.
Common Hazards in Older Homes
Older homes often contain materials or systems that were once considered standard but may now present health, safety, financing, or insurance concerns.
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- Lead-Based Paint: Commonly used before 1978. Federal law requires sellers to provide lead-based paint disclosures when applicable. Lead exposure can be especially harmful to young children.
- Knob-and-Tube Wiring: Frequently found in homes built during the early 1900s. While not always unsafe by itself, many insurance companies view it as a higher risk, and replacement is often recommended.
- Asbestos: Commonly found in insulation, flooring, pipe wrap, siding, and other building materials in older homes. Asbestos is generally safest when left undisturbed, but renovations often require specialized removal procedures.
Using a Home Inspection to Make Better Investment Decisions
Every property has flaws. The goal of an inspection isn’t to find a perfect house—it doesn’t exist. The goal is to identify problems before they become expensive surprises and determine whether the investment still makes financial sense.
Remember, discovering an issue doesn’t automatically mean you should walk away from the deal. Many successful investors purchase properties with aging roofs, outdated electrical systems, or other repair needs. The key is understanding the cost of those repairs, factoring them into your offer, and deciding whether the numbers still work.
Whenever possible, hire a qualified home inspection professional and use their findings alongside your own due diligence. Spending a few hundred dollars before closing can potentially save you thousands after you own the property.
Thanks for reading this week’s Experience, and best of luck in your real estate investing journey!
-BROCK