A home inspection is one of the most important steps in buying a house. For a few hundred dollars and a couple of hours, a qualified inspector can surface problems that might cost tens of thousands to fix — or that might convince you to walk away from a bad deal altogether. Yet many first-time buyers treat the inspection as a formality rather than the protection it's meant to be.
This guide covers everything you need to know: what inspectors look for, what red flags to take seriously, how much it costs, and how to turn inspection findings into negotiating leverage.
What Is a Home Inspection — and Why Is It Non-Negotiable?
A home inspection is a professional, visual examination of a property's physical condition. A licensed inspector systematically evaluates the home's major systems and structural components, then produces a written report documenting their findings — including defects, safety concerns, and items likely to need near-term repair or replacement.
The inspection is not an appraisal (which establishes market value) and it's not a code compliance check. It's an objective assessment of what's working, what isn't, and what might fail soon.
Why every buyer should get one:
- It gives you an accurate picture of what you're actually buying, not just what looks good during a showing
- Inspection findings create a legal negotiation opportunity before closing
- Discovering a serious problem after closing — when the seller is gone and it's your problem — is far more costly than walking away before signing
- In some cases, inspection findings can void the transaction entirely if a major contingency clause is triggered
Most real estate contracts include an inspection contingency, giving buyers a set window (typically 7–17 days after an accepted offer) to complete inspections and decide how to proceed.
What Does a Home Inspector Actually Check?
Does the inspector check the exterior and foundation?
Yes — the exterior is where the inspection begins. The inspector walks the perimeter, assessing the foundation, grading, drainage, siding, and overall structural integrity.
Foundation and structural elements: Inspectors look for cracks, settling, bowing, or evidence of movement. Minor hairline cracks in concrete block or poured foundations are common; horizontal cracks or large diagonal cracks are more serious. They'll also check the sill plate (where the house meets the foundation) for rot or pest damage.
Grading and drainage: The ground around the house should slope away from the foundation, directing water away rather than toward it. Flat or negative grading is one of the most common causes of basement water intrusion and foundation problems.
What about the roof?
Roof condition is one of the most closely watched elements of any inspection. The inspector evaluates:
- Roofing material type and approximate remaining lifespan
- Missing, curling, or damaged shingles
- Condition of flashing around chimneys, skylights, and valleys
- Gutters and downspouts
- Evidence of previous leaks or repairs visible from the attic
Asphalt shingle roofs typically last 20–30 years. A roof near end-of-life doesn't mean the house is a bad buy — but it does mean you should price that cost into your offer. A full roof replacement can run $8,000–$20,000 or more depending on size and materials.
What plumbing issues do inspectors look for?
Inspectors check the accessible plumbing throughout the home, including:
- Water supply lines (material matters — copper is durable; polybutylene is a known failure risk)
- Drain lines and visible drainage under sinks
- Water pressure at multiple fixtures
- Water heater age, condition, and proper installation
- Visible leaks or evidence of past leaks (staining, warping)
- Proper venting of fixtures
Water heaters typically last 8–12 years. An older unit isn't a deal-breaker, but factor in replacement cost ($800–$1,500+ installed).
How do inspectors evaluate the electrical system?
Electrical is one of the most safety-critical systems in the home. The inspector will:
- Examine the main electrical panel for proper breaker labeling, capacity, and safety
- Check for double-tapped breakers, missing knockouts, or signs of amateur wiring
- Test a sampling of outlets for proper wiring and grounding
- Identify visible wiring concerns in the attic or crawlspace
- Note the presence of any outdated or hazardous wiring types
What's checked in the HVAC system?
The inspector will operate the heating and cooling systems, check the furnace or heat pump, inspect ductwork where accessible, change (or note the condition of) the air filter, and assess the estimated remaining life of each unit.
HVAC equipment typically lasts 15–25 years depending on type and maintenance. Replacement costs range from $3,000–$10,000+ for a full system.
What else does a standard inspection cover?
Windows and doors: Operation, sealing, weatherstripping, evidence of failed seals in double-pane glass (fogging indicates seal failure).
Insulation and ventilation: Attic insulation levels and attic ventilation — both affect energy efficiency and can contribute to moisture problems if inadequate.
Appliances: Built-in appliances like dishwashers, garbage disposals, and built-in microwaves are typically tested for basic operation.
What Are the Biggest Red Flags in an Inspection Report?
Not all inspection findings are equal. Here's a severity-ranked overview of what deserves the most attention:
1. Foundation problems
Significant foundation issues — especially horizontal cracks, bowing walls, or evidence of major settlement — are among the most serious findings a buyer can receive. Foundation repairs can range from $5,000 for minor crack injection to $30,000–$80,000+ for underpinning or full structural repair. Always get a structural engineer's assessment if the inspector flags foundation concerns.
2. Roof damage or end-of-life condition
A damaged or aged roof affects every room below it. Inspectors frequently find deferred roof maintenance that sellers hoped wouldn't come up. A roof with 1–3 years of life left should factor heavily into your negotiations.
3. Electrical hazards
Three electrical red flags deserve immediate attention:
- Knob-and-tube wiring: Found in homes built before 1940, this ungrounded system is a fire risk and is often uninsurable without rewiring
- Federal Pacific or Zinsco panels: These brands have documented failure rates and are considered safety hazards by many electricians and insurers
- Aluminum branch wiring (1960s–70s homes): Requires specific outlets and connections to reduce fire risk; often requires remediation
4. Water damage and mold
Water damage is both a structural concern and a health concern. Inspectors look for staining, warping, soft spots in floors, and evidence of past or active leaks. If mold is suspected, a separate mold test is worth the investment — professional remediation can run $2,000–$10,000+ depending on extent.
5. Pest and termite damage
Termites cause over $5 billion in property damage annually in the U.S. A separate pest inspection (often required by lenders in certain states) will specifically assess for wood-destroying organisms. Damage from termites, carpenter ants, or moisture-related wood rot can range from minor to structurally significant.
6. HVAC at end of life
A functioning but aging HVAC system isn't a crisis — but if the furnace is 25 years old and showing rust, corrosion, or heat exchanger cracks (which can allow carbon monoxide to enter living spaces), that's both a safety and financial concern worth addressing before closing.
What Should You Do With Inspection Results?
Can you negotiate after a home inspection?
Yes — and this is one of the most valuable moments in a transaction. After receiving the inspection report, you have several options:
Request specific repairs. You can ask the seller to fix identified defects before closing. This works well for clear-cut safety issues or items that are factually broken.
Negotiate a price reduction. Rather than asking the seller to manage repairs (which may be done minimally or poorly), many buyers prefer to take a price credit and handle repairs themselves. This gives you control over the quality of work.
Ask for closing cost credits. A seller credit at closing puts cash in your pocket that you can apply to repairs after you take ownership. This avoids the complications of repair timelines delaying closing.
Walk away. If the inspection reveals major structural, safety, or environmental problems that the seller won't address, and the numbers don't work even with concessions, your inspection contingency gives you the right to exit the contract and recover your earnest money.
Buyers working with ShopProp get the same professional representation in negotiations — but because of the flat-fee structure, they keep more of the commission as a rebate, effectively reducing their out-of-pocket costs at closing.
How Much Does a Home Inspection Cost?
Standard home inspections typically run $300–$500 for a single-family home, though costs vary by:
- Home size (inspections of homes over 3,000 sq ft often cost more)
- Home age (older homes have more to evaluate and can take longer)
- Geographic market (higher-cost metros generally have higher inspection fees)
- Inspector experience and credentials
Specialized inspections to consider:
| Inspection Type | When to Get It | Typical Cost |
|---|---|---|
| Sewer scope | Homes 20+ years old, trees near sewer line | $100–$300 |
| Radon test | Recommended in most U.S. regions | $100–$200 |
| Mold inspection | If inspector notes moisture or staining | $300–$600 |
| Foundation/structural engineer | If foundation concerns are flagged | $300–$700 |
| Pest/termite inspection | Older homes, wooded areas, certain states | $75–$200 |
| Septic inspection | Homes on private septic systems | $250–$500 |
| Chimney inspection | Working fireplaces or wood stoves | $100–$250 |
Don't skip specialized inspections to save a few hundred dollars — discovering a failed sewer line after closing can cost $4,000–$15,000 to replace.
Tips for Getting the Most Out of Your Inspection
- Attend in person. Walk through the home with the inspector. Seeing issues firsthand is more informative than reading a report later.
- Ask questions. Good inspectors will explain what they're finding as they go. Don't be shy about asking what something means or how serious it is.
- Read the full report. Don't skip to the summary. The detail section often contains context that changes how you interpret a finding.
- Don't panic at a long report. Every house — even new construction — will have a report with items. The question is whether those items are normal maintenance or serious problems.
- Hire an independent inspector. Your inspector should have no financial relationship with your agent, the seller, or any contractor who might do repair work.
FAQ: Home Inspections for Buyers
Can the seller refuse to let me do an inspection?
Technically, a seller can refuse, but this is a significant red flag. In most transactions, inspection contingencies are standard. A seller who refuses an inspection may be concealing known defects. Most buyers should treat this as a warning sign and proceed with extreme caution — or not at all.
What if the home is sold "as-is"?
An as-is listing means the seller will not make repairs, but you are still entitled to conduct an inspection. The inspection results inform your decision to proceed or walk away. Many as-is sales involve distressed properties where the price already reflects condition — but you need the inspection to verify your assumptions before committing.
Should I get an inspection on new construction?
Absolutely. New homes are built by humans and inspected by municipal inspectors who have limited time per visit. Independent inspectors on new construction find incomplete work, missed items, and code violations regularly. A pre-drywall inspection (before walls are closed up) is especially valuable.
How long does a home inspection take?
Most standard inspections take 2–4 hours, depending on home size, age, and condition. Larger or older homes, or those with multiple systems to evaluate, can take longer. Plan to be present for the full inspection.
Can a home fail an inspection?
Inspections don't pass or fail — they document condition. There's no threshold that automatically kills a deal. The buyer and seller negotiate based on findings, and it's ultimately up to both parties whether the deal moves forward. The most extreme finding — such as a dangerous structural defect or significant mold — may lead a buyer to exercise their contingency and exit, but that's a business decision, not a "fail."
