What a US Home Inspection Actually Checks

A home inspection isn’t a pass/fail test — it’s a systems-by-systems report on the physical condition of the house, and what it covers is narrower than most first-time buyers assume. Knowing exactly what’s in scope, and what isn’t, is what lets you use the report to negotiate or walk away instead of being surprised by either the findings or the gaps in them.

What’s Covered

A standard general home inspection is a visual, non-invasive review of the home’s major systems, typically taking two to four hours depending on the home’s size. The inspector isn’t opening up walls, running specialized diagnostic equipment, or testing anything they can’t observe directly — this is a critical distinction that shapes everything else about how to read the report.

Core areas a standard inspection covers:

• Roof: age indicators, visible damage, flashing, and remaining functional life where estimable from the exterior.
• Foundation and structure: visible cracking, settling, or moisture intrusion at the foundation; structural framing where accessible.
• HVAC system: whether heating and cooling systems function, approximate age, and visible maintenance condition — not a full performance diagnostic.
• Electrical: the panel, visible wiring, outlet and switch function, and any obviously outdated or hazardous wiring types.
• Plumbing: visible pipes, water pressure, fixture function, and signs of past or active leaks.
• Visible pest and water damage: termite or wood-destroying insect evidence, water staining, and signs of past moisture problems.

The inspector’s job is to report condition, not to guarantee remaining lifespan — a roof “functioning with no active leaks” and a roof “with five years of life left” can look identical on inspection day, and a good inspector will say so rather than guess.

What’s Not Covered by a Standard Inspection

This is the part that surprises the most buyers, because the gaps aren’t obvious from the inspection report’s table of contents — they’re just quietly absent.

The sewer lateral line. This is the underground pipe connecting the house to the municipal sewer main or a septic system, and it’s invisible, underground, and entirely outside the scope of a standard inspection. A sewer scope — a small camera run through the line — is a separate, specialist inspection, and it’s especially worth ordering on an older home where tree roots or pipe deterioration are more likely.

Pools and spas. If the property has one, it typically needs its own specialist inspection covering the pump, filtration system, structural integrity, and safety equipment — none of which a general inspector evaluates as part of the standard scope.

Chimney interior. A general inspector will typically note visible exterior condition, but a full chimney sweep-and-inspect, which checks the flue interior for creosote buildup or structural cracks, is a separate service — important if the home has a wood-burning fireplace you actually plan to use.

Mold testing. A standard inspector notes visible signs consistent with a moisture problem — staining, a musty smell, visible growth — but confirming and quantifying mold requires air sampling and lab analysis, a distinct specialist service you’d order if the general inspection raises a flag.

Radon and pest specifics. Many general inspectors offer radon testing and wood-destroying-organism inspections as add-ons rather than including them by default — confirm what’s bundled into your specific inspector’s quote rather than assuming.

Reading the Report

A typical inspection report can run 30-50+ pages and list dozens of items, which is exactly why the report itself isn’t the deliverable that matters — how you triage it is.

Sort into three categories, not one long list:

1. Safety and structural deal-breakers — active water intrusion, foundation issues, electrical hazards, a roof at end of life. These are the items worth walking away over, or requiring resolution before closing, not just noting.
2. Real negotiation items — functional but aging systems (an HVAC unit near end of typical life, minor plumbing issues) that justify a repair credit or price adjustment, but aren’t safety-critical.
3. Normal wear, worth knowing but not acting on — minor cosmetic notes, small maintenance items any homeowner deals with routinely. Most line items on a typical report land here.

The mistake most first-time buyers make is treating every item on the list with equal weight, which either causes them to walk from a fundamentally sound house over a cosmetic note, or — just as often — get so overwhelmed by page count that they miss the two items that actually mattered.

What Happens After

Your purchase contract sets an inspection contingency period — commonly 7-10 days from contract acceptance, though this varies by state and by the specific contract used — during which you review the report and decide how to proceed. Missing this deadline typically means losing the contractual right to negotiate or exit based on the inspection, so it’s worth confirming the exact date in writing the moment your contract is signed, not estimating it.

Within that window, you generally have three options, depending on what your specific contract allows:

• Request repairs. Ask the seller to fix specific items before closing, typically the safety/structural category from your triage.
• Request a credit or price reduction. Instead of repairs, negotiate money off the price or a closing-cost credit, letting you handle the repair yourself post-closing on your own timeline.
• Walk away. If the inspection reveals something serious enough, most inspection contingencies let you exit the contract with your earnest money returned — though the exact conditions for this depend on your contract’s specific language.

In a competitive market, some buyers waive the inspection contingency entirely to make their offer more attractive — this doesn’t mean skipping the inspection itself, but it does mean giving up your contractual leverage to negotiate or exit based on what it finds. That’s a materially different risk profile, worth understanding clearly rather than doing by default because “that’s what it takes to compete.”

Before your inspection contingency deadline arrives, know it in writing, and go in with a plan to sort the report into deal-breakers, negotiation items, and normal wear rather than reacting to the page count. If you’re earlier in the process, what to do before you start house shopping covers the groundwork worth doing beforehand, and what to do after signing your contract picks up right where this leaves off, walking through the rest of the closing timeline.