Home Inspection Guide: What Buyers Need to Know

The home inspection is your most important act of due diligence in a real estate transaction. It is the only opportunity you will have, before committing irrevocably to the purchase, to get a professional assessment of the property’s true physical condition. Buyers who take this seriously — who choose the right inspector, attend the inspection, and use the findings strategically — protect themselves from some of the most costly mistakes in real estate.

This guide covers everything you need to know.

What a Home Inspection Covers

A standard home inspection is a visual examination of the home’s accessible systems and components by a licensed or certified inspector. The scope includes:

Structure and foundation: The inspector examines the foundation, basement or crawlspace, framing, walls, floors, and ceilings for signs of settling, cracking, water damage, or structural compromise.

Roof: From ground level or from the roof itself, the inspector evaluates the condition of shingles or other roofing material, flashing, gutters, downspouts, and visible roof penetrations. They will estimate remaining useful life if possible.

Exterior: Siding, trim, grading (does water drain away from the foundation?), driveways, walkways, decks, and patios are all within scope.

Plumbing: The inspector runs water at all fixtures, flushes toilets, and checks for visible leaks, water pressure, and water heater condition. They note the type of supply and drain piping, which matters if you’re getting a mortgage (galvanized steel and polybutylene can be issues for lenders).

Electrical: The inspector checks the service panel, visible wiring, outlets, switches, and fixtures. They look for open junction boxes, double-tapped breakers, aluminum wiring in living spaces, missing GFCI protection in wet areas, and other safety hazards.

HVAC: The heating and cooling systems are operated and evaluated for function and condition. Inspectors typically note the age of equipment and any visible deficiencies.

Interior: Ceilings, walls, floors, doors, and windows are examined for signs of damage, water intrusion, or deferred maintenance.

Insulation and ventilation: Attic insulation levels, ventilation, and the presence of bathroom exhaust fans are checked.

Appliances: Built-in appliances included in the sale are typically tested for basic functionality.

The National Association of Realtors recommends all buyers conduct a professional inspection regardless of market conditions — even buyers who waive inspection contingencies often complete an informational inspection so they understand what they’re purchasing.

What Home Inspections Don’t Cover

A standard inspection has important limitations:

• Pests and wood-destroying organisms — a separate pest inspection is usually required and often recommended
• Mold testing — visual observation only; air quality testing requires a specialist
• Sewer line condition — requires a separate sewer scope (camera inspection of drain lines)
• Underground oil tanks, wells, or septic systems — specialists are needed for each
• Pool and spa equipment — often excluded unless specifically added
• Radon, lead paint, asbestos — separate specialized tests

In older homes or homes with specific risk factors, consider ordering these additional inspections even if they add cost. A $200 sewer scope that reveals a collapsed drain line 20 feet from the house has paid for itself many times over.

How to Choose a Home Inspector

Not all inspectors are equally qualified. The inspection industry is regulated inconsistently across states — in some, inspectors require extensive training and licensing; in others, almost anyone can hang a shingle.

Certifications to Look For

The two most widely recognized professional organizations are:

• ASHI (American Society of Home Inspectors) — requires education, experience, and passing an exam
• InterNACHI (International Association of Certified Home Inspectors) — requires ongoing education and testing

Membership in either organization is a meaningful signal of professional commitment.

How to Find Candidates

Ask your buyer’s agent for recommendations, but also ask friends, family, and colleagues who have recently purchased homes. Read reviews on Google and Yelp. Don’t simply accept the first name your agent offers without doing your own research.

Ask potential inspectors:

• How many inspections have you performed on homes of this type and age?
• What does your report include, and can I see a sample?
• Do you carry errors and omissions (E&O) insurance?
• How long will the inspection take, and how soon will I receive the report?

A thorough inspection of an average home takes 2.5–4 hours. If an inspector says they can do it in 90 minutes, find someone else.

Bankrate’s home buying guides note that buyers should budget $300–$600 for a standard inspection, with variations based on home size and location. This is one of the best investments in the entire transaction.

Attending the Inspection

Go to the inspection. This is non-negotiable advice. The written report will be comprehensive, but there is no substitute for seeing the issues in context with the inspector’s explanation.

During the inspection:

• Follow the inspector through the home — ask questions freely, especially “how significant is this?” and “what would fixing this typically cost?”
• Note the inspector’s emphasis — what they spend the most time on reveals what they consider most important
• Take your own photos — even though the report will include photos, your own images can help you remember which issue was where
• Don’t read the report at the site — it typically arrives within 24 hours; review it methodically at home rather than absorbing it in real time during the inspection

Your agent should also attend if possible. An experienced agent who has seen hundreds of inspections can offer immediate context on whether a finding is typical for homes of this age or a genuine outlier.

Reading the Inspection Report

Inspection reports range from 40–80 pages or more for a thorough inspection. The format varies by inspector, but most reports:

• Include photos of every significant finding
• Use severity categories (safety concern, repair recommended, monitor, maintenance item)
• Cover every system in the home sequentially
• Include summary sections highlighting the most significant findings

How to Prioritize Findings

When you receive your report, read the summary first, then read the full report. Categorize findings into three tiers:

Priority 1 — Safety and major structural items: Anything flagged as a safety concern, signs of active water intrusion or mold, structural issues, or major system failures. These require immediate attention in your negotiation.

Priority 2 — Significant deficiencies: Near-end-of-life systems (roof, HVAC, water heater), significant deferred maintenance, drainage issues, failed window seals in many windows. These have real cost implications.

Priority 3 — Minor and maintenance items: Typical wear and tear, minor caulking or weatherstripping, single GFCI outlet additions. Note these but don’t prioritize them in negotiation.

Redfin’s research blog has published data showing that buyers who focus their post-inspection negotiation on material items receive concessions at significantly higher rates than buyers who submit exhaustive lists of every minor finding.

Red Flags vs. Minor Issues

Some inspection findings are genuinely alarming; others are cosmetic noise that inspectors include for completeness. Developing judgment about the difference is critical.

Genuine red flags:

• Foundation cracks with differential movement (one side higher than the other)
• Evidence of past or active water intrusion (water staining, efflorescence, soft subfloor)
• Knob-and-tube wiring throughout (insurance and lender issues)
• Furnace or HVAC system in failure or unable to be tested
• Signs of mold in living areas or excessive moisture in crawlspaces
• Structural members showing rot, pest damage, or improper repairs

Typically minor:

• Missing GFCI outlets in one or two locations (cheap to add)
• Worn weatherstripping or minor caulking issues
• A few missing handrail balusters
• Garage door opener not reversing properly (adjustment or sensor cleaning)
• Minor efflorescence on a concrete block foundation wall without active moisture

The Consumer Financial Protection Bureau recommends asking the inspector directly whether any finding they’ve noted warrants a specialist consultation — structural engineers, electricians, plumbers, and HVAC technicians can all provide additional technical depth when needed.

What Happens After the Inspection

Once you’ve reviewed the report and prioritized your concerns, you have three paths forward:

1. Request repairs or credits: Your contract typically allows you to request that the seller address specific findings within a defined period. Focus on material items and support your request with contractor quotes when possible.

2. Accept as-is: You decide the home is worth purchasing in its current condition at the current price. This is appropriate when findings are minor and already reflected in the listing price.

3. Exit the contract: If findings reveal problems too significant to accept, and your inspection contingency is active, you can terminate the contract and recover your earnest money.

For a complete guide to navigating post-inspection negotiations — including how to request credits, handle seller pushback, and decide when to walk away — see our articles on negotiating repairs after home inspection and how to negotiate price after a home inspection.

One Last Walk-Through Before Closing

Even after your inspection negotiations are resolved, do not skip the final walk-through scheduled for 24–48 hours before closing. This is your chance to verify that:

• Agreed-upon repairs were completed to a reasonable standard
• The home is in the same condition as when you went under contract
• No appliances, fixtures, or personal property included in the sale have been removed
• No new damage has occurred during the seller’s move-out

If you discover problems at the final walk-through, you have options: request a credit at closing, ask for a repair escrow holdback, or (in extreme cases) postpone closing. HUD’s homebuying resources and the National Association of Realtors both recommend making the final walk-through a non-negotiable step in every transaction — it catches issues that would otherwise become your problem the moment you take possession.

The home inspection process is not something to minimize or rush. The few hundred dollars you spend and the hours you invest are among the most valuable resources in your entire home purchase.