A home inspection checklist is a structured set of items a licensed inspector evaluates before a buyer commits to purchasing a property. It covers every major system and structural component, from the foundation and roof to the electrical panel and HVAC, to identify defects, safety hazards, and deferred maintenance before closing day.
- What Is a Home Inspection Checklist and Why Does It Matter?
- 1. Exterior and Structural Features: The First Line of Defense
- 2. Foundation: The Most Expensive Item to Overlook
- 3. Roof Inspection Checklist: What to Look For From Top to Bottom
- 4. Attic and Insulation: Where Energy Efficiency and Moisture Problems Hide
- 5. Plumbing: What Your Inspector Is Really Checking
- 6. Electrical System: The Items That Create Immediate Safety Concerns
- 7. HVAC System: Age, Efficiency, and Operating Condition
- 8. Mobile Home Inspection Checklist: Key Differences to Know
- 9. Home Insurance Inspection Checklist: What Underwriters Look For
- 10. New Construction Home Inspection Checklist: Yes, You Still Need One
- 11. What Happens After the Inspection: Using the Report Effectively
- FAQ: Home Inspection Checklist
If you’re a buyer getting ready to schedule an inspection, knowing what’s on that checklist helps you ask the right questions, interpret the inspection report, and negotiate repairs from a position of knowledge rather than guesswork.
If you’re earlier in your home search, our first-time home buyer guide walks through the full journey, from pre-approval to offer to closing, and shows you where the inspection fits into that timeline.
What Is a Home Inspection Checklist and Why Does It Matter?
A home inspection checklist is the framework a certified home inspector uses to evaluate a property’s condition in a systematic, room-by-room and system-by-system format. It’s the difference between closing on a house with confidence and discovering a $15,000 foundation problem three months after moving in.
For buyers, this checklist serves two purposes. First, it helps you prepare for inspection day so nothing gets overlooked. Second, it becomes the basis for repair negotiations or credit requests with the seller.
The typical inspection covers roughly 400 to 1,000 individual checkpoints depending on the inspector and the property type. This article walks through the most important categories so you know exactly what your inspector should be looking for and what red flags deserve the most attention.
The sections below move from the exterior to the interior, following the same logical sequence most professional inspectors use. Each section also notes what issues are most likely to turn into expensive repairs after closing.
1. Exterior and Structural Features: The First Line of Defense
The exterior is where inspectors start, and for good reason. Structural problems, water intrusion, and drainage failures often show their earliest signs on the outside of the home before they cause visible damage inside.
Your inspector should evaluate the foundation visible above grade, the grading and drainage around the home, all exterior siding or cladding, window and door frames, decks, porches, driveways, and walkways.
Key items on the exterior portion of the buyers home inspection checklist include:
- Grading that slopes away from the foundation (a minimum 6-inch drop over 10 feet is the standard)
- No standing water or soil erosion near foundation walls
- Siding free of cracks, rot, warping, or missing sections
- Window seals and caulking intact with no signs of moisture infiltration
- Deck and porch ledger boards properly attached with no rot or deterioration
- Driveway and walkway surfaces without major cracking or upheaval
Drainage problems are one of the most commonly missed issues in a basic walkthrough. Water that pools near the foundation eventually makes its way into basements and crawlspaces, causing mold, structural wood damage, and efflorescence on concrete walls.
The exterior also gives you a first read on the overall maintenance history of the property. A well-maintained exterior usually means the mechanical systems inside have received similar attention.
2. Foundation: The Most Expensive Item to Overlook
Foundation issues are the category that makes buyers most nervous, and with good reason. Structural repairs are expensive, disruptive, and sometimes not fully covered by standard homeowner’s insurance.
The home inspection checklist for buyers should include a close evaluation of:
- Horizontal cracks in basement or crawlspace walls (more serious than vertical cracks, which are common with settling)
- Stair-step cracking in brick or block foundation walls
- Walls that are bowing, leaning, or visibly out of plumb
- Evidence of prior patching or repair with hydraulic cement
- Floor sloping more than 1 inch per 8 feet, which can indicate differential settlement
- Signs of moisture, efflorescence, or active water seepage
A single vertical crack in a poured concrete foundation does not automatically indicate a structural problem. Many older homes have settlement cracks that have been stable for decades. However, cracks wider than 1/4 inch, horizontal cracks, or any cracking paired with bowing walls requires further evaluation by a structural engineer before you proceed.
Your inspector will note what they observe, but a general home inspector is not a structural engineer. If the inspection report flags any foundation concerns, budget $300 to $700 for a structural engineer consultation before negotiating with the seller.
3. Roof Inspection Checklist: What to Look For From Top to Bottom
The roof is one of the three most expensive components of a home, along with the foundation and HVAC system. A roof replacement on an average-sized home costs $8,000 to $22,000 depending on material and pitch, which makes this section of the inspection particularly high stakes.
The roof section of a new home inspection checklist or a standard buyers home inspection checklist should cover:
| Roof Component | What Inspectors Evaluate |
|---|---|
| Shingles | Missing sections, curling, cupping, granule loss, age relative to expected lifespan |
| Flashing | Proper sealing at chimney, valleys, skylights, and roof-to-wall transitions |
| Gutters and downspouts | Secure attachment, proper slope toward downspouts, no separating seams |
| Fascia and soffit | Rot, paint failure, signs of animal entry points |
| Chimney | Crown condition, mortar joints, cap presence, flashing seal |
| Attic ventilation | Adequate ridge and soffit vents, no signs of moisture buildup |
Most inspectors evaluate the roof from the ground with binoculars or from the roof edge. They are not typically required to walk the roof surface if doing so poses a safety risk. If accessibility is limited, ask whether a drone inspection is available as an add-on service.
Asphalt shingles typically last 20 to 30 years. If the home has a 15-year-old roof and you’re planning to stay for 10 or more years, factor a roof replacement into your long-term cost projections even if no active leaks are present.
4. Attic and Insulation: Where Energy Efficiency and Moisture Problems Hide
The attic connects the roof to the living space and is often where early signs of roof leaks, inadequate insulation, and ventilation failures first appear. It’s an area many buyers never see during a showing, which is exactly why inspectors pay close attention here.
The attic section of the home inspection checklist should include:
- Water stains or dark discoloration on roof sheathing (evidence of past or active leaks)
- Insulation R-value appropriate for the climate zone (R-38 to R-60 is recommended for most U.S. climates)
- Ventilation ratio of 1 square foot of net free area per 150 square feet of attic floor
- No bathroom or kitchen exhaust fans venting directly into the attic space instead of outside
- Signs of animal activity including nesting materials, droppings, or chewed wood
- Knob-and-tube wiring present and covered by insulation, which is a fire hazard
Improper attic ventilation creates moisture buildup that leads to mold growth on the underside of roof sheathing. Mold remediation in an attic can cost $1,500 to $3,000 or more, and it’s a condition that may require disclosure to future buyers when you sell.
5. Plumbing: What Your Inspector Is Really Checking
Plumbing issues are among the most common findings in an inspection report, and they range from minor fixture problems to serious drainage failures or outdated pipe materials that require full replacement.
The plumbing portion of the home inspection checklist covers:
- Supply line materials (copper and PEX are current standard; polybutylene pipe installed between 1978 and 1995 is problematic and may require replacement)
- Drain line materials (ABS and PVC are current standard; cast iron and galvanized steel are functional but age-limited)
- Water pressure tested at multiple fixtures (40 to 80 PSI is the normal operating range)
- Hot water temperature within a safe range (120°F is the recommended maximum to prevent scalding)
- Water heater age and condition (average lifespan is 8 to 12 years for tank units)
- All toilets, sinks, tubs, and showers tested for proper drainage and operation
- Sump pump operation if present
One item that standard inspectors often cannot assess is the sewer line condition. Inspectors evaluate the interior drain system but typically cannot inspect underground sewer lines from the home to the municipal connection. For homes older than 20 years, adding a sewer scope inspection as a separate service ($150 to $300) is strongly recommended. Tree root intrusion, pipe bellying, and deteriorated clay tile are not visible without a sewer scope camera.
6. Electrical System: The Items That Create Immediate Safety Concerns
Electrical defects are the inspection findings most likely to create immediate safety hazards. Inspectors evaluate the service panel, visible wiring, outlets, and fixtures throughout the home.
The electrical section of the home inspection checklist for buyers includes:
- Service panel brand and amperage (200-amp service is the current standard for most homes; 100-amp service is functional but may be limiting for modern electrical loads)
- Federal Pacific Electric (FPE) and Zinsco panels are known fire hazards and should be replaced regardless of apparent condition
- Double-tapped breakers (two wires connected to a single breaker terminal) indicate overcrowded panels
- Aluminum wiring on 15 and 20-amp branch circuits (installed in some homes from the 1960s to 1970s) requires specific connection methods to prevent fire
- GFCI protection at all wet locations including bathrooms, kitchens, garages, exterior outlets, and unfinished basements
- AFCI protection on bedroom circuits in homes built after 2002
- Ungrounded two-prong outlets throughout the home
Knob-and-tube wiring is another finding that generates significant concern. While intact knob-and-tube is not inherently unsafe, many insurance companies will not write policies on homes with active knob-and-tube wiring, which affects your ability to insure the property.
7. HVAC System: Age, Efficiency, and Operating Condition
Heating and cooling systems are major capital expenses. A furnace replacement costs $2,500 to $7,500, and a full HVAC system replacement runs $5,000 to $12,000 for most residential properties. Understanding the age and condition of these systems before closing is essential to your financial planning.
The HVAC section covers:
- Furnace or air handler age relative to the expected lifespan (gas furnaces average 15 to 20 years, heat pumps 10 to 15 years, central A/C condensers 10 to 15 years)
- Heat exchanger condition on gas furnaces (a cracked heat exchanger allows combustion gases including carbon monoxide to enter living spaces)
- Cooling operation verified at the thermostat during the inspection
- Filter condition as an indicator of ongoing maintenance habits
- Ductwork condition and any visible disconnections or damage in accessible areas
- Carbon monoxide detector presence near sleeping areas
- Adequate supply and return air flow in all living spaces
If the inspection occurs during a season where A/C or heat cannot be tested (some inspectors follow limitations based on outdoor temperature), request a written agreement with the seller to address any deficiencies discovered at the first operation.
8. Mobile Home Inspection Checklist: Key Differences to Know
A mobile home inspection checklist follows a similar structure to a site-built home inspection, but several components require specific evaluation due to the construction methods used in manufactured housing.
Mobile and manufactured homes have unique inspection considerations including:
- HUD compliance tag (required on all manufactured homes built after June 15, 1976) should be verified as present and legible
- Chassis and frame condition including rust, corrosion, and integrity of the steel undercarriage
- Tie-down and anchoring system evaluated against local wind zone requirements
- Vapor barrier condition in the crawlspace or chassis area, including any tears or missing sections
- Marriage wall connections on multi-section homes for proper sealing and structural alignment
- Roof condition with attention to the standing seam or membrane roofing common on manufactured homes
- Skirting condition and ventilation openings
HUD-code manufactured homes built after 1976 are inspected to federal building standards, but the construction tolerances differ from site-built homes. Inspectors with specific manufactured housing training are preferred for these inspections over general home inspectors with limited factory-built housing experience.
9. Home Insurance Inspection Checklist: What Underwriters Look For
A home insurance inspection checklist is different from a buyer’s inspection. Insurance underwriters send their own inspectors or require documentation to verify that the property meets their insurability standards before issuing a homeowner’s policy.
The items that most frequently result in insurance coverage problems or premium increases include:
- Roof age over 20 years (some carriers require a certified roof inspection or decline coverage for roofs above a certain age threshold)
- Electrical panels with known defects including Federal Pacific Electric, Zinsco, and fuse boxes
- Presence of knob-and-tube or aluminum branch circuit wiring
- Wood-burning stoves or fireplaces without current inspection documentation
- Swimming pools or trampolines without appropriate fencing or netting (liability exposure)
- Evidence of prior water damage or current moisture conditions
- Active polybutylene plumbing
If your purchase inspection reveals any of these items, contact your insurance agent before closing to verify that coverage is available and at what premium. Some lenders will not fund a mortgage on a property that cannot be insured.
10. New Construction Home Inspection Checklist: Yes, You Still Need One
Many buyers assume that a newly built home does not require an independent inspection. This assumption can be costly. New construction has its own category of defects that arise from rushed timelines, subcontractor coordination failures, and building material installation errors.
The new construction home inspection checklist should pay particular attention to:
- Grading and drainage finalized around the foundation before landscaping is complete
- Framing inspected before drywall installation closes off visibility
- Insulation installed before interior finish work covers wall and ceiling cavities
- Mechanical system rough-in completed correctly before walls are closed
- Final walkthrough inspection covering all completed work, punch list items, and builder warranties
The best practice for new construction is to schedule three inspections rather than one: a pre-drywall inspection when framing, insulation, and mechanical rough-ins are visible; a final construction inspection before your closing walkthrough; and an inspection at the 11-month mark before the builder’s standard one-year warranty expires.
Builder inspectors work for the builder, not for you. An independent inspection at each phase gives you documentation of any defects observed before the building materials conceal them permanently.
11. What Happens After the Inspection: Using the Report Effectively
The inspection report is a tool, not a decision in itself. Most home inspection reports run 30 to 80 pages depending on the property age and the number of findings. Understanding how to use the report strategically is as important as the inspection itself.
After receiving the report, prioritize findings into three categories:
- Safety hazards requiring immediate correction: active electrical hazards, carbon monoxide risks, structural deficiencies, gas leaks
- Major systems with limited remaining useful life: aging HVAC, roof at end of lifespan, water heater beyond expected service life
- Deferred maintenance and cosmetic issues: caulk failures, minor grading corrections, cosmetic wood rot on exterior trim
Negotiating repairs on every item in the report signals inexperience and can damage your relationship with the seller unnecessarily. Focus repair requests on safety items and major systems. For cosmetic items and routine maintenance, use the report to build your post-closing maintenance budget instead.
If major concerns exist, you have three responses available within your inspection contingency period: request specific repairs from the seller, request a price reduction or closing cost credit to address the issues yourself, or exercise the inspection contingency to exit the contract without penalty.
FAQ: Home Inspection Checklist
What does a home inspector not check?
A home inspector does not typically evaluate underground utilities, in-ground swimming pool equipment, solar panel systems beyond a visual assessment, the interior of chimneys beyond the accessible flue opening, septic system operation (requires a separate specialist), or mold testing beyond visible observation. Anything requiring specialized equipment or a licensed specialist falls outside the scope of a standard inspection.
How long does a home inspection take?
A standard home inspection takes 2 to 4 hours depending on the size and age of the property. Larger homes, older homes, and homes with complex systems or extensive deferred maintenance take longer. Budget a minimum of 3 hours for any home over 2,000 square feet and plan to be present for the full inspection.
Should buyers be present during the home inspection?
Yes. Walking through the property with the inspector as they work allows you to ask questions in real time and understand the severity of each finding. Reading a written report without that context is significantly less useful. The verbal summary your inspector provides on-site often covers details and nuances that don’t translate as clearly into a written report.
How much does a home inspection cost?
A standard home inspection costs $300 to $500 for most residential properties. Larger homes, older homes, and add-on services such as radon testing ($150 to $200), sewer scope ($150 to $300), or mold air sampling ($200 to $400) increase the total. The inspection fee is one of the most cost-effective expenses in the entire home buying process relative to the financial protection it provides.
Can a seller refuse to allow a home inspection?
A seller can refuse, but most standard purchase contracts in the United States include an inspection contingency that gives buyers the right to commission an inspection within a specified period. A seller who refuses a reasonable inspection request raises an obvious question about what they are trying to prevent you from discovering.
What is the most important thing on the home inspection checklist?
No single item is universally most important because the severity depends on the specific property, its age, location, and intended use. That said, structural integrity, electrical system safety, and evidence of water intrusion affecting the foundation or framing represent the findings that most commonly result in the highest repair costs or pose the greatest safety risks.
