How to Prepare for a Home Inspection: A Seller’s Checklist and What to Expect

This guide is for sellers, and it is built around that gap. It covers what inspectors are required to look at and what their standards let them skip, the specific clearances the building and electrical codes call for at each access point, a room-by-room prep checklist, and what happens on inspection day and after the report. If you are on the buying side, our home inspection checklist for buyers covers choosing an inspector, what to look for system by system, and how to sort the findings.

For many sellers, preparing for an inspection means moving things three feet, not three miles. Where a short-term unit does make sense, usually when the inspection is one of several times the house has to be clear before closing, the last sections walk through how to size it from what is actually in the way.

One caution before the checklist: everything here about contracts, deadlines, and disclosure is general. Your purchase agreement and your state’s rules decide the specifics, so your agent or a real estate attorney is the right person for those calls.

Table of Contents

1. What Home Inspectors Check, and What They Are Allowed to Skip
2. The Clearance Numbers Every Access Point Needs
3. Home Inspection Checklist for Sellers, Room by Room
4. Fixes Worth Making Before the Inspection, and Fixes to Leave Alone
5. Paperwork to Leave Out for the Inspector
6. What to Expect on Inspection Day
7. What Happens After the Report Comes Back
8. Should You Get a Pre-Listing Inspection?
9. Home Inspection FAQ
10. When Storage Helps During a Home Inspection, and When It Doesn’t
11. How Much Space a Pre-Inspection Clear-Out Takes
12. The Short Version

What Home Inspectors Check, and What They Are Allowed to Skip

A general home inspection is a visual, non-invasive look at a house’s readily accessible systems and components. Most inspectors follow a written standard of practice, either one published by a national association such as the American Society of Home Inspectors (ASHI) or the International Association of Certified Home Inspectors (InterNACHI), or one their state adopts as part of licensing. The details differ, but the shape is consistent.

What gets inspected

Under the InterNACHI standard, the inspector covers the roof (from the ground or the eaves, with no obligation to walk on it), exterior walls, and grading and drainage where they could affect the structure. Inside, the list runs through the foundation, basement, crawl space, and structural components; heating and cooling using normal operating controls; plumbing, including the water heater and every fixture; the electrical service and panel, plus a representative sample of outlets and switches; fireplaces; attic insulation and ventilation; doors, windows, walls, floors, stairs, and railings; and the garage door and opener. The inspector also reports whether smoke and carbon monoxide alarms are present.

What the standards let them skip

For a seller, the exclusions matter more than the inclusions. Both major standards say the inspector is not required to:

• Move your things: ASHI’s standard says the inspector does not have to move personal property, furniture, equipment, plants, soil, snow, ice, or debris. InterNACHI’s list adds rugs, wall coverings, pets, and anything else that might restrict the visual inspection.
• Enter spaces that aren’t readily accessible: attics and crawl spaces included. InterNACHI defines readily accessible as something that can be observed safely without removing obstacles.
• Turn systems on: neither standard requires operating a system that is shut down, opening shut-off valves, or lighting pilot lights.
• Test for specialized hazards: radon, mold, wood-destroying insects, lead, and asbestos sit outside a general inspection under both standards. They are separate inspections if the buyer orders them.
• Judge code compliance: a home inspector is not a code official, and ASHI’s standard specifically excludes compliance with codes and regulations.

Two smaller exclusions catch sellers off guard. InterNACHI inspectors are not required to run central air conditioning when it is below 65 degrees Fahrenheit outside, so a winter inspection may leave the AC untested. And that standard does not require inspecting household appliances, though many inspectors check built-ins anyway. Your agent can ask what the buyer’s inspector covers.

Why “not inspected” costs more than clutter looks

When an inspector can’t reach something, the report records a limitation: panel blocked by stored items, attic not entered, crawl space not accessed. That line doesn’t say anything is wrong. It says nobody knows, and the buyer has a short window to decide whether that is acceptable. The usual results are a request for the inspector to come back and finish (often with a re-inspection fee and another appointment inside a tight deadline), a request for a credit to cover the unknown, or a buyer who assumes the worst. Clearing access ahead of time costs an afternoon. Clearing it after the report costs a negotiation.

The Clearance Numbers Every Access Point Needs

The building and electrical codes spell out how much clear space each access point needs, and while a home inspector isn’t enforcing code on an existing house, these numbers describe the working space the systems were designed around. Treat them as targets for what to clear, not as a test your house has to pass.

• Electrical panel: The National Electrical Code (Section 110.26) calls for a working space in front of the panel at least 30 inches wide (or the width of the panel, if wider), 36 inches deep, and 6.5 feet high, and it says that space is not to be used for storage. The panel door also has to be able to swing open at least 90 degrees. Electrical inspectors describe storage in that zone as one of the most common violations they encounter, and in a garage or basement it is usually the first thing a home inspector has to work around.
• Furnace, air handler, and water heater: The International Residential Code (Section M1305.1) requires a level working space at least 30 inches deep and 30 inches wide in front of the control side of each appliance. Where equipment sits in a closet or alcove, the code also calls for an unobstructed passageway at least 24 inches wide to reach it. That 30-by-30 square is where the inspector reads data plates, looks at venting connections, and checks the water heater’s temperature and pressure relief valve.
• Attic hatch: The code’s minimum attic access opening is 22 by 30 inches, located in a hallway or another spot with ready access, with at least 30 inches of headroom above it (Section R807.1). Many hatches sit in closet ceilings, so the closet floor needs to be empty enough for a ladder to stand and the shelf under the hatch clear enough to climb past. If the attic holds a furnace or air handler, the code adds a clear passageway at least 22 inches wide and 30 inches high from the hatch to the equipment (Section M1305.1.3), so keep stored boxes off that path too.
• Crawl space access: Code minimums are 18 by 24 inches for an opening through the floor and 16 by 24 inches through a perimeter wall (Section R408.4). Exterior crawl doors tend to disappear behind firewood, trash bins, and shrubs. Interior floor hatches tend to end up under a rug, a dresser, or a closet full of shoes.
• Under sinks: The inspector runs every faucet and checks the drain and supply lines below each sink. Empty the kitchen sink base, every bathroom vanity, and the laundry sink cabinet.
• Basement and garage walls: InterNACHI’s standard requires reporting observed signs of active water penetration and possible foundation movement, and both show up on wall surfaces that stored items hide. No code sets a distance here. Pulling boxes and shelving two to three feet off the foundation walls lets the inspector see and photograph the wall from the floor up.
• Garage door: The inspector operates the door and opener and reports photo-eye sensors that don’t work. Clear the door’s full path and the line between the two sensors near the floor.
• Exterior perimeter: Siding, grading, and the visible foundation are all inspected. Move stacked items, bins, and firewood away from the house walls, and clear the area around the outdoor AC unit and any exterior electrical disconnect.

Add those zones up and the space that has to be truly empty is smaller than most sellers expect. The panel, furnace, and water heater working spaces come to about 20 square feet combined (7.5 for the panel and 6.25 each for the two appliances). Add a closet floor, a hatch, and a strip along the walls, and that is the job. Most homes don’t need to be emptied for an inspection. They need specific spots cleared to specific dimensions.

Home Inspection Checklist for Sellers, Room by Room

Work through this the week before, not the morning of. The reasons are included for the items sellers most often miss.

Utilities and mechanical areas

• All utilities on: water, electricity, and gas, even in a vacant house. Inspectors aren’t required to turn on systems that are shut down, so a winterized or disconnected house produces a report full of untested items.
• Pilot lights lit: water heater, furnace, and gas fireplace. The standards don’t require the inspector to light them.
• Breakers on: a tripped or switched-off breaker can leave a whole circuit of outlets reading as dead.
• Fresh HVAC filter: a clogged filter is a cheap item that shows up on a lot of reports.
• Working spaces cleared: the panel, furnace, water heater, and attic and crawl space access, to the dimensions in the previous section.

Kitchen, baths, and laundry

• Empty sink cabinets so drains and supply lines are visible.
• Empty the dishwasher, oven, washer, and dryer in case the inspector runs them, and clear dishes out of the sink.
• Fix running toilets and dripping faucets, and replace cracked or missing caulk at tubs and showers.
• Test GFCI outlets with their test and reset buttons. Inspectors test every GFCI outlet they can identify.
• Run the exhaust fans in each bathroom and over the range.

Attic and crawl space

• Clear the closet or hallway under the hatch, including the floor where a ladder will stand.
• Make sure pull-down stairs work and the hatch isn’t painted or screwed shut.
• Clear the crawl space door outside or the floor hatch inside, and leave a note on where it is if it isn’t obvious.

Garage

• Test the opener’s auto-reverse: the door industry’s guidance, printed on opener labels since 1993, is that a closing door must reverse when it hits a 1.5-inch-high object, roughly a 2x4 laid flat, on the floor under the center of the door.
• Clear the door’s path and the photo-eye beam.
• Pull stored items away from the panel, the water heater, and the walls.

Exterior

• Clear the perimeter: trim shrubs back from the siding, move firewood and bins, and keep a walkable path around the house.
• Clean the gutters and make sure downspouts discharge away from the foundation.
• Unlock gates, the garage, and exterior utility closets or disconnects. Detached sheds fall outside the ASHI and InterNACHI general standards, but some inspectors look anyway, so unlock those too.

Every room

• Replace burned-out bulbs so a dead fixture isn’t mistaken for a wiring problem.
• Check smoke and carbon monoxide alarms: InterNACHI’s standard requires inspectors to report missing alarms. The National Fire Protection Association says smoke alarms should be replaced 10 years from the manufacture date printed on the back, so check the date while you test them.
• Make windows operable: unlock them and move furniture enough to open them.
• Leave remotes, keys, and codes for ceiling fans, gas fireplaces, gates, and the alarm system on the kitchen counter with a short note.
• Secure valuables and medications, since the buyer, the agents, and the inspector will move through every room.
• Take pets with you for the appointment.

Fixes Worth Making Before the Inspection, and Fixes to Leave Alone

Good pre-inspection repairs are small, cheap, and easy to verify. A burned-out bulb, a dirty filter, a running toilet, a dripping faucet, a loose handrail, a missing outlet cover, or cracked caulk each takes minutes to fix, and each one left alone becomes a line item in the report and a talking point in negotiation.

Some well-intended fixes make the report worse. These are the ones to skip or hand to a professional:

• Swapping two-prong outlets for three-prong ones: a three-prong outlet on a circuit with no ground wire reads as an “open ground” on the plug-in tester inspectors carry, and the InterNACHI standard requires them to report it. The electrical code (NEC 406.4(D)(2)) allows specific alternatives, such as GFCI protection with a “No Equipment Ground” label. That is an electrician’s job, and leaving the original two-prong outlets in place beats a swap done wrong.
• Pressure-washing the roof: asphalt shingle makers and their trade association advise against it because it strips the protective granules, and granule loss is one of the things inspectors note on roofs.
• Working inside the electrical panel or adjusting gas appliances: licensed trades only, with receipts.
• Painting over stains or patching cracks right before the inspection: one fresh patch of paint on a ceiling draws an inspector’s attention rather than deflecting it, and covering up a known defect can create legal exposure under many states’ disclosure rules. If there is a known problem, fix the cause and keep the paperwork, or disclose it. Your agent can tell you how your state handles it.

Big-ticket items, such as a roof near the end of its life, an aging HVAC system, or foundation repair, are a pricing and negotiation decision to make with your agent, not an inspection-prep task. A written contractor quote you can hand to the buyer is often more useful than a rushed replacement.

Paperwork to Leave Out for the Inspector

A folder on the kitchen counter fills gaps the inspection can’t. The most useful items:

• Service records for the furnace, AC, and water heater, especially if the inspection falls in cold weather and the air conditioning can’t be tested.
• Dates and receipts for a roof replacement, major repairs, and any work done under a permit.
• Warranties that transfer to a buyer, such as roofing, windows, or HVAC equipment.
• Septic and well records: pumping and inspection history, a sketch showing where the tank is, and well test results. General inspection standards exclude septic systems and wells, so buyers often order those separately, and your records save them time.
• Radon test or mitigation records, if you have them.
• A one-page note marking the main water shut-off, gas shut-off, crawl space access, attic hatch, and anything quirky, such as the breaker that controls the garage outlets.

Leave copies and keep the originals. The inspector may photograph them, and the buyer’s agent may ask for them later anyway.

What to Expect on Inspection Day

The buyer’s inspection usually happens within days of a signed contract, because the clock on the buyer’s inspection or due diligence period is already running. Here is how the day typically goes.

• Who is there: the inspector, usually the buyer, and the buyer’s agent. Sellers are rarely present and generally shouldn’t be. Buyers ask more questions and the inspector works faster in an empty house, so plan to be gone for the whole appointment.
• How long it takes: most general inspections of an average single-family house run somewhere around two to four hours. Larger, older, or crowded houses take longer.
• What the inspector does: walks the exterior and looks at the roof (from the ground, a ladder at the eaves, or sometimes a drone), runs faucets and flushes toilets, operates heating and cooling from the thermostat, tests GFCI outlets and a sample of the others, opens a representative number of windows and doors, enters the attic and crawl space if they are readily accessible, and photographs what they find.
• Add-on inspections: the buyer may order separate radon, wood-destroying insect, sewer scope, septic, or well inspections, sometimes the same day and sometimes later in the week.

If the buyer orders a radon test

Radon is the one add-on that needs the seller’s cooperation. The EPA-based protocol for real estate testing, which North Carolina’s Department of Health and Human Services lays out in its guide for buyers and sellers, calls for closed-house conditions for at least 12 hours before a short-term test begins and for the entire test, which typically runs at least 48 hours. Closed-house means windows shut, exterior doors closed except for normal coming and going, no fans pulling in outside air, and heating or cooling run normally. Leave the test device where the tester put it. Opening windows or moving the device can invalidate the result and cost both sides time inside the buyer’s deadline.

What Happens After the Report Comes Back

A home inspection doesn’t have a pass or fail. The report is a written account of what the inspector observed, usually sorted into material defects, safety issues, maintenance items, and limitations. InterNACHI’s standard defines a material defect as an issue that may have a significant, adverse impact on the property’s value or that poses an unreasonable risk to people, and it adds that a system being near or past the end of its normal life is not, by itself, a material defect.

The buyer then decides, inside whatever window the contract sets, whether to proceed, ask for repairs, ask for a credit or price reduction, or, where the contract allows it, walk away. How that window works depends on the state and the contract form. North Carolina’s standard offer to purchase, for example, uses a negotiated due diligence period, and the state Real Estate Commission notes that buyers keep the right to verify agreed repairs and do a final walk-through even after that period ends. The dates and remedies in your signed contract govern, and your agent or a real estate attorney is the right person to interpret them.

For sellers, a few practical points hold almost everywhere:

• Read the summary first, then the limitations. A limitation you can fix quickly, such as an attic not entered because of stored boxes, is often the easiest item to resolve by clearing it and letting the inspector return.
• Get written quotes for anything significant before agreeing to a credit amount.
• Keep receipts for agreed repairs. The buyer will likely want to see them before closing.
• Expect to clear access again. The same spaces may need to be open for a re-inspection, contractor visits, the appraisal, and the final walk-through.

Should You Get a Pre-Listing Inspection?

Some sellers hire their own inspector before listing. The advantages are real: no surprises after you are under contract, time to collect repair quotes, and the option to fix things on your own schedule rather than inside a buyer’s deadline.

It also has trade-offs:

• It usually doesn’t replace the buyer’s inspection. Most buyers hire their own inspector regardless of what you hand them.
• What you learn, you may have to disclose. Many states require sellers to disclose known material defects, and a pre-listing report can turn a problem you didn’t know about into one you do. How that interacts with your state’s disclosure form is a question for your agent or a real estate attorney, ideally before you order the inspection.
• It costs money and time, including the same preparation described above.

It is most often worth considering for older homes, homes that have been rentals or sat vacant, and estate sales where the seller doesn’t know the house’s history. For a newer, well-kept house with good records, a thorough service-history folder may do much of the same work.

When Storage Helps During a Home Inspection, and When It Doesn’t

For a lot of sellers, a home inspection on its own isn’t a reason to rent a storage unit.

You probably don’t need storage if:

• Things can move a few feet. If the garage has open floor, the boxes stacked in front of the panel and water heater can sit in the middle of the floor for the day. The working spaces at the panel, furnace, and water heater total about 20 square feet.
• A spare room can absorb it. Moving the contents of the closet under the attic hatch onto a bedroom floor for a few days costs nothing.
• The inspection is the only time the house needs to be clear and you are moving out within days anyway. A month of rent to cover one morning doesn’t add up.
• Your movers are already booked to pack and load before closing.

Storage starts to make sense when:

• The clear-out has to last. The same spaces often need to stay open through the inspection, a re-inspection, contractor visits for agreed repairs, the appraisal, and the final walk-through. That is weeks, not a morning, which is the stretch a month-to-month rental is built for.
• There is no floor to shift things onto, such as a garage packed wall to wall or a basement lined with shelving along every foundation wall.
• Your closing and your next move-in don’t line up. If you close before the next home is ready, the boxes already out of the way can stay out of the way.
• The clear-out is permanent. When you are downsizing, the things pulled off the walls for the inspection are often the things that weren’t going to fit in the next place.

Timing matters on the cost side. 10 Federal Storage units rent month to month with a one-month minimum and no penalty for leaving, but unused days aren’t refunded, so a unit earns its keep when it covers the whole stretch from inspection to closing rather than a single appointment.

For a few weeks of garage boxes, tools, and seasonal gear, a standard drive-up unit is fine. Climate-controlled units, which protect against extreme temperatures, are worth considering for wood furniture, electronics, photos, and documents, especially if the stay stretches through a hot summer or a hard winter.

How Much Space a Pre-Inspection Clear-Out Takes

If you do rent, size the unit from what is actually in the way, not from the size of the house. Here is a worked example using the item volumes in the 10 Federal storage size calculator, for a house where the garage wall holds the panel and water heater, the basement walls are lined with boxes, and the attic hatch sits in a full closet.

• Garage wall in front of the panel and water heater: 12 medium boxes (36 cubic feet), 8 plastic totes (24), a tool chest (14), a ladder (9), 2 bicycles (20), and 2 patio chairs (14). Subtotal: 117 cubic feet.
• Basement foundation walls: 16 large boxes (72) and a treadmill (30). Subtotal: 102 cubic feet.
• Closet under the attic hatch: 6 medium boxes (18) and 2 suitcases (8). Subtotal: 26 cubic feet.

That is 245 cubic feet of belongings. The calculator assumes 8-foot ceilings and about 75% packing efficiency, because boxes and bikes never fill a unit perfectly, so divide by 0.75: 245 divided by 0.75 is about 327 cubic feet of unit space. A 5x5 holds 200 cubic feet at an 8-foot ceiling, which isn’t enough. A 5x10 holds 400, which covers it with room for a few late additions. That puts this example in the small unit range.

The number climbs quickly if you are also clearing furniture, for example to keep the house open and uncluttered from inspection through the final walk-through. Add a 3-seat sofa (50), a dresser (26), and a queen mattress set (42), and the list reaches 363 cubic feet, or about 484 after the packing adjustment. That outgrows a 5x10 and moves into the medium range, where a 5x15 (600 cubic feet at an 8-foot ceiling) or a 10x10 (800) fits.

Every 10 Federal Storage enclosed unit has a ceiling of at least 8 feet, and freestanding shelving is allowed, which helps boxes use the full height. To run your own list, compare sizes in the storage unit size guide or add each item to the calculator.