The published numbers, and how much weight they carry
Home inspection pricing is quoted nationally as a single average, and the single average is the least useful number in the discussion. HomeAdvisor's cost page, updated June 19, 2026, put the national average at $344 with "most homeowners paying between $296 and $424." Rocket Mortgage's guide, updated February 7, 2026, reported an average of $343 and the same $296–$424 range.
Those two figures agree because they are the same figure. Rocket cites HomeAdvisor's October 2025 dataset, so the apparent corroboration between the two most-cited consumer sources on inspection pricing is one source counted twice. Treat every dollar amount on this page as a dated observation of what a lead-generation marketplace reported, not as a price you can rely on in your market this month. The quote in your inbox will be shaped far more by the specific house than by any national average.
Why the fee behaves like an hourly rate nobody bills hourly
An inspection is a fixed-scope service performed by one person in one visit, so its cost is essentially the inspector's time plus his professional exposure. Nobody quotes it that way, because no buyer will accept an open-ended hourly number for a service booked against a deadline. Instead the trade prices time by proxy, and the proxies are consistent from market to market:
- Square footage — the dominant variable, almost always applied in brackets rather than per foot.
- Age — older houses carry legacy systems (knob-and-tube wiring, galvanized supply, original panels) that take longer to evaluate and carry more errors-and-omissions exposure.
- Foundation type and access — a full basement is fast; a low crawlspace is slow and dirty and in some markets carries a surcharge; slab-on-grade removes a whole category of inspection.
- System count — units, kitchens, furnaces, air conditioners, water heaters. A duplex is priced as two of several things, not as one larger thing.
- Region — time is priced against local cost of living and local competition.
- Detached structures — ASHI 13.2.E.5 excludes detached structures other than garages and carports, so a barn, guest house or detached shop is an add-on or is simply not inspected.
- Add-on services — radon, wood-destroying insect reports, sewer scopes, thermal imaging, mold sampling. Priced per service, and where the total bill moves most.
The practical consequence: a quote materially below the local range on a large or old house is usually pricing a shorter visit rather than offering a discount. There is no way to inspect a 3,500-square-foot 1925 house with two furnaces in the time a small slab ranch takes.
Square footage sets the base, and the curve is flat
HomeAdvisor's June 19, 2026 page published the size brackets below, which Rocket Mortgage reproduces from the same dataset. Recorded here as what those sources published on those dates, not as current market pricing:
| Home size | Published range (HomeAdvisor, June 19, 2026) |
|---|---|
| Under 1,000 sq ft | $200–$250 |
| 1,000–1,500 sq ft | $225–$325 |
| 1,500–2,000 sq ft | $250–$375 |
| 2,000–2,500 sq ft | $275–$400 |
| 2,500–3,000 sq ft | $300–$500 |
Roughly tripling the size of the house does not triple the fee, because much of the inspection is fixed — the drive, the setup, the exterior circuit, the mechanical room, the report writing. What scales is the interior walk and the number of similar components sampled, and the standards already relieve the inspector of inspecting "every similar component occurrence." The base fee is therefore both the least negotiable and the least interesting part of the bill.
Age, access and system count: where the quote actually moves
Two houses of identical size can carry meaningfully different quotes, and the difference is almost always one of these.
Age. Legacy systems are slower to evaluate and riskier to sign off on. A house with an original panel, three generations of supply piping and a chimney serving two appliances takes longer than a house where everything is one build vintage.
Foundation and access. The crawlspace is the clearest case of access driving price. It is slow, filthy work, and the standard gives the inspector a hard out: ASHI 3.2 does not require entry into crawlspaces with less than 24 inches of clearance or with access openings smaller than 16 by 24 inches. An inspector who does enter marginal crawls is selling more inspection than one who does not, and may price accordingly. A crawlspace surcharge is buying coverage of the sub-floor framing, sub-floor plumbing and moisture condition — the systems most likely to produce an expensive surprise.
System count. Every additional furnace, air conditioner, water heater, panel and kitchen is a discrete block of time.
Detached structures. Because ASHI 13.2.E.5 excludes detached structures other than garages and carports, a detached shop, barn or guest house is out of scope by default. Ask for it explicitly or receive a report on the house and nothing on the outbuilding you are also buying.
Region. Rocket Mortgage's February 7, 2026 guide, drawing on the same dataset, published metro examples including Miami at $300, Atlanta and Chicago at $320, Los Angeles at $330, Houston at $350, and New York and Philadelphia at $450. That roughly 50 percent spread is real but modest against the add-ons, which vary far more. Spend no time shopping the base fee and considerable time deciding which specialty inspections to buy.
The add-ons, and which ones earn their keep
The figures below are what the two cited consumer sources published on the dates given — sewer scope, termite, pool, septic, indoor air quality, lead paint and foundation from Rocket Mortgage's February 7, 2026 page; radon, asbestos, mold, chimney and roof from HomeAdvisor's June 19, 2026 page. They are dated observations, not quotes.
| Service | Published figure | What makes it worth buying |
|---|---|---|
| Sewer scope | $270–$1,734 | Any house older than roughly 40 years, mature trees over the lateral, clay or Orangeburg pipe, a history of backups, or slow drains in the general report. The lateral is excluded from both standards and is a five-figure repair. |
| Radon test | $250 | EPA and the Surgeon General recommend that all houses be tested, not only those in high-radon zones. Cheap, bounded, and the mitigation cost is known rather than open-ended. |
| Termite / WDI (NPMA-33) | $75–$325 | Required by the lender on most VA loans and many FHA loans in termite-prone areas; warranted wherever there is subterranean termite pressure, prior treatment, or wood-to-soil contact. Usually the cheapest add-on available. |
| Septic evaluation | $200–$900 | Every septic property. A failed or undersized system, or a cesspool, can require a replacement system and a health-department permit that may not be issuable on the lot. |
| Mold / indoor air quality | $660; IAQ $292–$584 | Visible growth, musty odor, elevated moisture readings, prior flooding or a finished basement. Buy it to characterize a known symptom, not as a routine screen — mold is usually a water-intrusion problem under another name. |
| Asbestos survey | $490 | Pre-1980 construction with duct wrap, pipe insulation, 9x9 floor tile, textured ceilings or cement-asbestos siding — and above all before any renovation. Intact asbestos is a renovation-planning problem, not an occupancy emergency. |
| Lead-based paint | $300–$700 (also published at $340) | Pre-1978 housing. Federal law already gives the purchaser a 10-day period, unless the parties agree in writing on a different one, to conduct a risk assessment or inspection — a statutory window separate from the contract's. |
| Chimney evaluation | $450 | Any solid-fuel appliance, any chimney with a known fire, any change of fuel or appliance. The flue liner is the component that fails and the component both standards exclude. |
| Foundation / structural engineer | $300–$750 | Any report of foundation movement, stair-step cracking, out-of-plumb walls, sloping floors or prior underpinning. No home inspector may opine on structural adequacy, so this is the document the parties will negotiate from. |
| Pool and spa | $200–$500 | Any pool or spa. Neither standard's required systems list includes it, and bonding and grounding of pool equipment is a life-safety item. |
| Standalone roof inspection | $230 | Worth it when the general inspector could not walk the roof — snow, ice, pitch, height or covering type — and the covering is central to the negotiation. |
The sewer-scope range is the most revealing figure in the table, and the reason is arithmetic rather than pricing policy. The top of $270–$1,734 is not a camera pass. It is a camera pass plus locating, and probably plus installing a cleanout because the house does not have one. If a quote lands at the high end, ask which of those three things you are paying for before assuming you are being overcharged.
Two services are routinely oversold. Thermal imaging is a legitimate additional service under ASHI 2.3, but it is a moisture and temperature-differential tool, not an X-ray; it earns its keep against a specific question and not as a general upgrade. And well testing is genuinely two tests — flow and yield on one hand, water quality and potability on the other — so buying one does not get you the other.
The arithmetic that actually decides this
Every figure above is a rounding error against the cost of a single finding. A radon test commonly published at $250 sits against a mitigation system widely cited in the low four figures — and EPA recommends fixing homes at 4 pCi/L or higher, with mitigation worth considering between 2 and 4. A sewer scope in the low hundreds sits against a lateral replacement routinely quoted in the thousands to tens of thousands. An engineer's letter in the mid hundreds sits against a foundation repair with no upper bound worth guessing at.
So the real question is not "what does an inspection cost" but "what does it cost not to know" — and the honest counter-framing is uncomfortable. A general inspection alone is the cheapest and the least complete of the available options. It is a triage instrument, designed to identify which specialists you need. Buy it and then decline every referral it generates, and you have paid for the diagnosis and skipped the treatment.
The rational sequence is to choose add-ons from the property's characteristics before the general inspection — age, foundation type, water and waste systems, fuel-burning appliances, pool, trees over the lateral — and book them concurrently. Waiting for the general report to tell you what to order costs days you may not have.
How long a home inspection takes
Rocket Mortgage states that "home inspections usually take about two to four hours to complete" and that "your report usually comes back in about one to three days." That is a lender's consumer page rather than a standards body, and neither ASHI nor InterNACHI prescribes a duration, so read the numbers as typical trade practice. The mechanics underneath them are what let you predict your own appointment.
Size
The rough working rule in the trade is about an hour per 1,000 square feet plus a fixed setup. A 1,200-square-foot ranch finishes in roughly two hours; a 4,000-square-foot two-story with a finished basement runs four to five. The fixed component — arrival, exterior circuit, roof, documentation, mechanical room, write-up — is why the bottom of the range does not fall much below two hours no matter how small the house.
Age and system count
Two furnaces, two water heaters, three panels, a well and a septic system each add a discrete block of time. Age adds time less visibly: legacy systems have to be identified before they can be evaluated, and mixed-vintage systems take longer than uniform ones.
Access — the counterintuitive one
An occupied house with a packed garage, a blocked attic hatch, a locked crawlspace or boxes against the panel converts inspection time into negotiation time. But because the standards do not require the inspector to move personal property (ASHI 13.2.F.3), obstruction does not extend the appointment. It shrinks the scope. The inspector finishes on time, bills the same fee, and reports those areas as not inspected. This is the most common way a buyer pays full price for a partial inspection.
Add-ons and their separate clocks
A sewer scope adds roughly thirty to sixty minutes and needs an accessible cleanout — if there is not one, it may not happen that day at all. A radon test adds only a short deployment at the start, but it also adds a return trip at least forty-eight hours later, because the real-estate protocol calls for testing under closed-house conditions maintained for at least twelve hours beforehand and throughout. That forty-eight-hour tail is why radon is the add-on most likely to collide with a short option period.
Weather
Snow or ice means the roof is not walked; InterNACHI expressly does not require removing "snow, ice, debris or other conditions that prohibit the observation of the roof surfaces." Cold weather means the air conditioner is not operated. Neither shortens the appointment much; both shorten the report's coverage.
The turnaround is what your deadline actually cares about
Two to four hours for the appointment. One to three days for the report. Any specialist the report refers you to is on his own calendar entirely. Count backwards from the end of the option period through all three and the reason experienced buyers inspect in the first forty-eight hours becomes obvious. Remedies expire at a fixed hour, and no part of that chain speeds up because you are running late.
What the fee does not buy
A great deal of post-closing disappointment traces back to a buyer who thought the fee bought more than it does.
- No warranty or guarantee. ASHI 13.2.B.4 states the inspector is not required to offer "warranties or guarantees," and InterNACHI says the same. The report describes observed condition on one day.
- No code compliance determination. Excluded by both standards. Not a code inspection, not a code official.
- No cost estimates. Excluded by both standards, which is why the report you paid for is not evidence of what anything costs and why you need contractor numbers before negotiating.
- No life expectancy. Both standards exclude determining remaining service life, even though "nearing the end of service life" is a reporting trigger.
- No engineering, architectural, contracting or surveying services, and no opinion on structural adequacy.
- No opinion on whether to buy, and none on market value or marketability.
The payment terms follow the same logic. The buyer pays out of pocket, at time of service, and the fee is generally non-refundable regardless of what happens to the transaction. That is the real cost of a deal that dies at the inspection — and it is the calculated risk in a pre-offer inspection, which produces a far better-informed bid and buys nothing at all if another bidder wins the house.
Frequently Asked Questions
How long does a home inspection take?
Two to four hours is the commonly published range for a typical single-family home, with the report following in about one to three days. Neither standards body prescribes a duration, so the figure is trade practice rather than a rule. The working approximation inspectors use is roughly an hour per 1,000 square feet on top of a fixed setup, which puts a small ranch near two hours and a large two-story with a finished basement at four to five.
Add-ons change the shape of the day more than its length. A sewer scope adds thirty to sixty minutes and needs an accessible cleanout; a radon test adds a short deployment plus a return trip at least forty-eight hours later.
Why is my quote higher than the published national average?
Because the national average describes a house that may look nothing like yours. The quote is driven by square footage bracket, age, foundation type and access, the number of furnaces, water heaters, panels and kitchens, and local cost of living. A high-cost metro, an old house, a low crawlspace and two HVAC systems each move the number independently.
The reverse is worth watching. A quote materially below the local range for a large or old house is usually pricing a shorter visit rather than offering a discount, because the cost of delivering an inspection is fundamentally the inspector's time.
Who pays for the home inspection, and when?
The buyer pays, out of pocket, at the time of service. It is not a closing cost and it is not financed — it is money that leaves your account before you know whether you are buying the house. It is also generally non-refundable: if the report kills the deal, you paid for the report and you keep the information.
Buyers inspecting several houses in a competitive market should budget for that outcome rather than be surprised by it.
Which add-on inspections are actually worth the money?
The ones matched to the property rather than bought as a package. A sewer scope on an older house or one with mature trees over the lateral; a radon test on essentially any house, since EPA and the Surgeon General recommend testing all homes; a septic evaluation on every septic property; well flow and water-quality testing on every private well; a wood-destroying insect report where the lender or region calls for one; a chimney evaluation wherever there is a solid-fuel appliance.
How long does it take to get the report back?
Commonly one to three days after the appointment. That gap is the part buyers underestimate when they schedule late in a short option period.
Work the arithmetic before booking: two to four hours for the appointment, one to three days for the report, then however long a referred specialist takes to schedule, attend and write. On a seven-day window, an inspection booked on day four leaves essentially no room for a structural referral or a radon test to finish before the deadline.
Does a home inspection cost more for an older house?
Usually, for two distinct reasons. Old houses take longer — legacy panels, mixed piping vintages, multiple chimneys and converted spaces all require identification before evaluation — and they carry more professional exposure for the inspector, which is priced in.
Age changes the add-on calculus more than the base fee, though. Pre-1978 housing brings lead-based paint into scope, pre-1980 construction brings asbestos-containing materials into scope, and past roughly forty years a sewer scope stops being optional in most inspectors' view. The base-fee difference is modest; the difference in the sensible add-on list is not.
Can I negotiate the inspection fee?
You can ask, but it is the wrong lever. The base fee is the most fixed and least consequential part of the transaction, and pushing an inspector to work for less on a large house buys a shorter visit rather than a discount.
The productive negotiation is over scope: which add-ons are included, whether marginal crawlspaces and roofs will be entered or walked, whether detached structures are covered, and how fast the report arrives. Those choices change what you learn. The fee mostly does not.