Home Inspection Cost Calculator
Get an instant estimate for a comprehensive home inspection. Factor in home size, age, foundation type, and critical add-ons like Radon and Sewer Scope.
Free Home Inspection Cost Calculator
Use this calculator to calculate the cost of home inspection near you for free. Enter your ZIP code for a localized estimate.
Property Details
Size and age significantly impact inspection time and cost.
Foundation Type:
Optional Testing:
Estimates are instant and require no contact information.
Based on inputs, your Home Inspection project cost is approximately:
Note that the cost above is purely an estimate.
The actual cost may be higher or lower depending on the contractor's quote.
How Much Does Home Inspection Cost?
A standard general home inspection runs about $300 to $500, with most 2,000 sq ft homes around $350–$450. The base fee climbs with size (~$50 per 500 sq ft over 2,000), older homes add a surcharge, and a crawlspace or basement adds for harder access.
Where the number really grows is optional testing — radon, termite, mold, a sewer scope, and thermal imaging are each billed on top, so a thorough inspection with several add-ons can reach $700–$900+. For a home purchase, that's small next to what the report can reveal before you're committed. Use the calculator above to price your size, age, foundation, and tests, then read on for what drives the quote — and which add-ons are worth it.
Home Inspection Cost by Size & Options
Base Cost by Home Size
| Home Size (Sq Ft) | Typical Cost | Estimated Time |
|---|---|---|
| Up to 1,000 | $300 – $350 | 2 – 2.5 hours |
| 1,000 – 2,000 | $350 – $450 | 2.5 – 3 hours |
| 2,000 – 3,000 | $450 – $550 | 3 – 4 hours |
| Over 3,000 | +$50 per 500 sq ft | 4+ hours |
Source: Baseline labor derived from U.S. Bureau of Labor Statistics, Construction & Building Inspectors (SOC 47-4011); ranges reflect our aggregated quote data. Age and foundation add surcharges; testing is billed separately.
Age, Foundation & Optional Testing
| Item | Cost | Notes |
|---|---|---|
| Older Home (Built 1950–1979) | +$75 | Aging systems take longer. |
| Historic Home (Pre-1950) | +$150 | Knob-and-tube, old plumbing. |
| Basement Foundation | +$50 | Extra time on walls and moisture. |
| Crawlspace Access | +$100 | Confined, physically demanding. |
| Radon Testing | ~$150 | 48-hour continuous monitor test. |
| Termite / WDO Inspection | ~$125 | Often required by lenders. |
| Mold / Air Quality Testing | ~$300 | Air and surface sampling. |
| Sewer Scope Camera | ~$250 | Camera down the main line. |
| Thermal Imaging Scan | ~$150 | Finds hidden moisture and gaps. |
Source: U.S. Bureau of Labor Statistics, Construction & Building Inspectors (SOC 47-4011) for baseline labor, combined with our aggregated quote ranges from licensed inspectors. Age and foundation adjust the base fee; testing items are optional add-ons.
The 6 Factors That Drive Your Quote
1. Home Size
The base fee scales with square footage, since a bigger home simply takes longer to inspect. Homes under 1,000 sq ft start around $300, up to 2,000 sq ft around $350, and above that roughly $50 is added for every additional 500 sq ft. Size is the foundation of the estimate before any age, access, or testing factors.
2. Home Age
Older homes take longer and need closer scrutiny of aging systems, so age adds a surcharge in two brackets: a smaller charge for homes built before 1980, and a larger one for pre-1950 homes with dated wiring (knob-and-tube), plumbing (galvanized/cast iron), and components. Age is also where specialized add-ons like a sewer scope tend to be most worthwhile.
3. Foundation & Access
How the inspector reaches the structure affects the price. A concrete slab is easiest and the standard rate. A basement adds about $50 for the extra time on walls, moisture, and structure. A crawlspace adds about $100 because it's a confined, physically demanding space requiring gear and slow, careful inspection of the foundation, joists, and plumbing underneath.
4. Optional Testing
Specialized tests are billed separately and target risks a visual inspection can't confirm: radon (~$150, a 48-hour test for the cancer-linked gas), termite/WDO (~$125, often lender-required), mold/air quality (~$300), a sewer scope camera (~$250, invaluable on older lines), and thermal imaging (~$150, to find hidden moisture and missing insulation). Add the ones that fit the home's age and your concerns.
5. What the Inspection Covers
A standard inspection is a visual, non-invasive review of the major systems — roof, exterior, foundation and structure, attic, electrical, plumbing, HVAC, and interior. It doesn't open walls or include specialized testing, pools, wells, or septic unless added. Knowing the scope helps you decide which add-ons to bolt on so nothing important goes unchecked.
6. The Report & Negotiating
The deliverable is a detailed report (usually with photos) flagging safety issues, defects, and items nearing end of life — not a pass/fail grade. Buyers use it within their inspection contingency to negotiate repairs, a price reduction, or a closing credit. The value of the inspection is less the fee than what the report saves you at the negotiating table or by walking away from a bad deal.
Which Add-Ons Are Worth It?
The base inspection is a given; the money question is which specialized tests to add. Match them to the home's age, location, and what a failure would cost.
Usually worth adding
- Radon in known radon regions — a cheap test versus a $1,200–$2,500 mitigation system.
- Sewer scope on any home 25+ years old, especially with mature trees or clay/cast-iron pipe.
- Termite/WDO where lenders require it, or in high-pest climates.
Add when there's a specific concern
- Mold / air quality if you see staining, smell mustiness, or the home had water issues.
- Thermal imaging to hunt hidden moisture, insulation gaps, or electrical hot spots on older homes.
If the report turns up radon, our radon mitigation calculator can price a fix.
Choosing an Inspector & Using the Report
The cheapest inspector isn't always the best value — a thorough report that catches a major defect is worth far more than the fee. Before you book:
- Check credentials — licensing (where required) and membership in InterNACHI or ASHI signal training and standards.
- Ask for a sample report — you want photos, clear severity ratings, and plain-language explanations.
- Attend the inspection so you can ask what's urgent versus routine while you're on-site.
What a complete quote should spell out
- The base fee and how it's set (size, age, foundation).
- Which optional tests are included versus extra, and their individual prices.
- The turnaround time for the written report (usually 24 hours).
- Whether the inspector carries E&O insurance and how they handle re-inspections.
Methodology & Sources
This calculator starts from a base fee set by home size (with ~$50 added per 500 sq ft over 2,000), adds an age surcharge (a smaller amount for pre-1980 homes, a larger one for pre-1950), adds a foundation surcharge for a basement or crawlspace, and adds any selected optional tests(radon, termite, mold, sewer scope, thermal). The result is adjusted to your ZIP code's regional price level. In short: Base Fee + Age + Foundation + Testing, × Regional Factor. Baseline labor is anchored to federal wage data and calibrated against our aggregated quote ranges from licensed inspectors.
Data sources:
- U.S. Bureau of Labor Statistics — Construction & Building Inspectors (SOC 47-4011)
- InterNACHI — Standards of Practice for Home Inspectors
- U.S. EPA — Radon Testing & Health Risk
For a full explanation of how every calculator on this site is built and localized, see our methodology page.
About the Reviewer
Licensed Professional Land Surveyor (PLS)
Professional land surveyor specializing in boundary, ALTA, and topographic surveys.
View full profile & credentials →Frequently Asked Questions
A standard general home inspection typically runs $300 to $500, with most 2,000 sq ft homes around $350–$450. The base fee rises with size (roughly $50 for every 500 sq ft over 2,000), older homes add a surcharge for their more complex systems, and a crawlspace or basement adds for the harder access. Optional testing — radon, termite, mold, sewer scope, thermal imaging — is billed separately, so a full inspection with several add-ons can reach $700–$900+.
Because they take longer and require more scrutiny. Homes built before 1980 often have aging systems — and pre-1950 homes may have knob-and-tube wiring, galvanized or cast-iron plumbing, and other dated components that need careful examination. The calculator reflects this with two age brackets: an added charge for homes built before 1980, and a larger one for pre-1950 homes. Older homes are also where add-ons like a sewer scope and thermal imaging tend to pay off most.
A general inspection usually isn't legally required, but skipping it is risky — it's your chance to find costly hidden defects (structural, roof, electrical, plumbing) before you buy. Many lenders do require a termite/WDO inspection, and some loan programs require specific checks. Even in a competitive market where buyers sometimes waive inspections to win a bid, most experts recommend at least an informational inspection so you go in with eyes open.
A standard inspection is a visual, non-invasive review of the home's major systems and components: roof, exterior, foundation and structure, attic and insulation, electrical, plumbing, HVAC, and interior. It does not open walls, and it generally excludes specialized testing — radon, termites/wood-destroying organisms, mold, the underground sewer line, and thermal scans are separate add-ons. It also typically excludes things like pools, wells, and septic systems unless specifically added.
Often, yes — they catch expensive problems a visual inspection can't. Radon is a colorless, odorless gas linked to lung cancer; a 48-hour test (~$150) tells you whether mitigation (typically $1,200–$2,500) is needed. A sewer scope (~$250) runs a camera down the main line to find root intrusion, blockages, or collapsed pipe — especially valuable on older homes with clay or cast-iron pipes, where a failed line can cost thousands to dig up and replace. Both are cheap insurance relative to what they can uncover.
A concrete slab is the easiest to inspect, so it's the standard rate. A basement adds a modest amount (about $50) for the extra time checking walls, moisture, and structure. A crawlspace adds more (about $100) because it's a tight, dirty, physically demanding space that requires protective gear and slow, careful movement to inspect the foundation, joists, plumbing, and insulation underneath. The harder the access, the more the inspection costs.
No — an inspection isn't pass/fail. It's a report on the home's current condition, flagging safety concerns, defects, and items nearing the end of their life so you can make an informed decision. There's no official grade. What you do with the findings — proceed, negotiate repairs or a credit, or walk away — is up to you and your contract's inspection contingency. Even a great home will have some items on the report; that's normal.
By default, no one is obligated to fix anything — the report is a tool, not a repair order. The buyer typically uses it to negotiate: ask the seller to make specific repairs before closing, request a price reduction, or take a closing credit to handle repairs themselves. What's achievable depends on the market and your contract's inspection contingency. In a hot market sellers push back more; in a slower one buyers have more leverage.
It's highly recommended, especially for buyers. Being there lets the inspector walk you through issues in person, show you where shutoffs and systems are, and share maintenance tips you won't get from the written report alone. Plan for the full 2–4 hours if you can. You'll come away understanding the home far better than by reading the report cold, and you can ask questions about which findings are urgent versus routine.
You can (and should) do your own walkthrough, but a licensed inspector is trained to spot subtle signs of major problems — foundation settlement, roof wear, aluminum wiring, hidden moisture, failing HVAC — that an untrained eye misses, and they carry the tools and liability that come with a formal report. For a purchase this size, the few hundred dollars an inspection costs is small next to the repairs it can reveal before you're committed.