If you're buying a home, one of the biggest questions on your mind is: what could go wrong with the inspection? Understanding the most common issues — and which ones are true deal-breakers — helps you prepare for the results and make confident decisions.
Do Homes Actually "Fail" Inspections?
Technically, a home inspection doesn't have a pass or fail result. Unlike a vehicle emissions test, there's no official score or binary outcome. The inspector's job is to document the condition of the property and identify deficiencies — not to declare the home unfit for purchase.
That said, certain issues are serious enough that most buyers would reconsider their offer or walk away entirely. These are the findings that effectively "fail" an inspection in practical terms — the ones that signal major expense, safety risks, or both.
Major Issues That Can Kill a Deal
These are the most significant categories of problems found during home inspections. Each one can represent thousands of dollars in repairs and may warrant renegotiating or walking away from the purchase:
1 Structural/Foundation Problems
Foundation and structural issues are among the most serious — and most expensive — findings in any home inspection. Signs include visible cracks in the foundation (especially horizontal or stair-step cracks), settling or sinking on one side, bowing basement walls, doors and windows that won't close properly, and uneven floors. Repair costs range from $2,000 for minor crack repair to $15,000+ for major stabilization work involving piering, underpinning, or wall anchors.
2 Roof Damage
A roof nearing end of life or showing signs of major damage is a significant red flag. Inspectors look for missing or curling shingles, damaged flashing, evidence of active leaks, sagging roof decking, and excessive wear. Minor repairs may cost a few hundred dollars, but a full roof replacement typically costs $5,000 to $12,000+ depending on size, materials, and complexity. A roof with less than 5 years of remaining life is a strong negotiating point.
3 Electrical Hazards
Electrical issues range from minor code violations to serious fire hazards. The most concerning findings include outdated wiring (knob-and-tube or aluminum), double-tapped breakers, Federal Pacific or Zinsco electrical panels, ungrounded outlets, and improper DIY wiring. Costs range from $1,000 for panel upgrades to $15,000 for full rewiring of an older home. Electrical problems are among the leading causes of house fires, making them a top priority.
4 Plumbing Failures
Major plumbing problems can cause extensive water damage and are expensive to remediate. Key concerns include failing sewer lines (especially older clay or cast iron), polybutylene pipes prone to sudden failure, active leaks behind walls, galvanized pipes corroded internally, and slab leaks. Repair costs range from $2,000 for targeted repairs to $15,000 for full repiping. A sewer scope inspection ($250–$500) is strongly recommended for any home over 25 years old.
5 Water Damage and Mold
Active water intrusion and mold growth are red flags that indicate both current damage and potential health risks. Signs include water stains on ceilings and walls, musty odors, visible mold in basements or attics, standing water in crawlspaces, and efflorescence on foundation walls. Repair costs depend on the extent of damage — from $1,000 for minor remediation to $10,000+ for extensive mold removal and water damage restoration. Mold can also affect insurability and resale value.
6 HVAC System Failure
A non-functional or end-of-life HVAC system is a major expense that buyers rightfully negotiate hard on. Systems past 75% of their expected lifespan, those using phased-out R-22 refrigerant, units with cracked heat exchangers (carbon monoxide risk), and systems showing multiple component failures are all serious concerns. Full HVAC replacement costs $3,000 to $16,000 depending on system type, efficiency rating, and home size.
7 Environmental Hazards
Environmental hazards pose health risks and often require specialized remediation. Common findings include asbestos (in older insulation, flooring, and siding), elevated radon levels, lead-based paint (in homes built before 1978), underground storage tanks, and contaminated well water. Costs vary widely: $500 for a radon mitigation system to $10,000+ for asbestos abatement. These issues may also affect the home's insurability and your ability to secure financing.
Safety Hazards Inspectors Flag
Beyond the major systems, inspectors also look for safety issues that may not be expensive to fix but are important for occupant protection:
- Missing smoke detectors — required in every bedroom, outside sleeping areas, and on every level of the home
- No handrails on stairs — a fall hazard and code violation, especially for elevated decks and staircases with more than two steps
- Improper venting — gas appliances (furnaces, water heaters, dryers) must be properly vented to the exterior to prevent carbon monoxide buildup
- Carbon monoxide risks — cracked heat exchangers, backdrafting appliances, and attached garages without proper air sealing
- Missing GFCI outlets — required near water sources (kitchens, bathrooms, garages, exteriors) to prevent electrocution
- Trip hazards — uneven walkways, loose carpeting, and missing stair treads
Issues That Usually Aren't Deal-Breakers
Not every item on an inspection report is cause for concern. These common findings are generally considered normal and shouldn't derail a transaction:
- Cosmetic issues — peeling paint, worn carpet, scuffed walls, and dated fixtures are aesthetic, not structural
- Minor maintenance items — clogged gutters, dirty filters, loose doorknobs, and dripping faucets are inexpensive to address
- Older-but-functional systems — a 12-year-old furnace that's working properly may have several good years left, even if it's not brand new
- Typical wear and tear — some deterioration is expected in any lived-in home and doesn't indicate deeper problems
- Code changes after construction — homes aren't required to be retroactively updated to meet new building codes unless major renovations are done
Find Out What Your Inspection Report Will Cost to Fix
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What to Do When Issues Are Found
Discovering problems on your inspection report doesn't mean the deal is dead. Follow these steps to make an informed decision:
- Get professional estimates — for any major issues, obtain quotes from licensed contractors. Specific cost data is far more powerful than the inspector's general observations in negotiations.
- Prioritize by severity — separate safety hazards and major structural issues from cosmetic concerns and minor maintenance items. Focus your negotiation energy on the items that matter most.
- Negotiate strategically — present the seller with a clear, itemized repair cost summary. Request a price reduction or closing credit rather than asking the seller to make repairs (you'll have more control over quality).
- Decide with data — compare the total repair costs against the purchase price, the home's market value, and your budget. If the numbers work after accounting for repairs, proceed. If they don't, your inspection contingency allows you to walk away.