What a Home Inspection Costs (and What Inflates It)
For a standard single-family house, a home inspection costs about $400 to $550 on Colorado’s Front Range and roughly $450 to $600 across most US metros. That fee buys a three-to-four-hour visual walk-through of a 1,500-to-2,500-square-foot home, photo documentation, and a written report delivered within 24 to 48 hours. Everything past that headline number depends on three things: how big and old the house is, which add-on tests you order, and whether your state licenses inspectors. This page breaks each of those down so you can predict your actual bill before you sign.
What the base fee covers
A standard inspection is a non-invasive, visual review of the systems a house runs on. The inspector walks the structure and reports the condition of each item on the day of the visit:
- Foundation, framing visible from the basement or crawlspace, and roof structure
- Roof covering, gutters, and exterior cladding
- Plumbing supply and drain lines and the water heater
- Electrical service, panel, and visible wiring
- Heating and cooling equipment
- Interior finishes, built-in appliances, insulation, and ventilation
That scope is not arbitrary. It follows the published Standards of Practice from the American Society of Home Inspectors (ASHI) and InterNACHI, both of which spell out exactly what a baseline inspection includes and excludes. Anything outside that list is either declined or quoted separately. A fuller walk-through of the checklist lives in what is involved in a home inspection.
What pushes the price up
Square footage is the single biggest lever. Bigger houses take longer to walk and produce longer reports:
| Home size | Typical base fee (Front Range) |
|---|---|
| Under 1,500 sq ft | $350 – $450 |
| 1,500 – 2,500 sq ft | $400 – $550 |
| 2,500 – 3,500 sq ft | $500 – $650 |
| 3,500 – 5,000 sq ft | $600 – $850 |
| Over 5,000 sq ft | $900 – $1,500 |
Age adds cost independent of size. A 1920s Denver bungalow with a crawlspace, knob-and-tube remnants, or galvanized supply lines takes longer to assess than a 2010 build of the same footage, usually $50 to $150 more. Condos and townhomes typically run $50 to $100 less than a detached house because you share the structural envelope with the building; that math is broken out in condo inspection cost. Duplexes, triplexes, and fourplexes are quoted per unit with a shared-structure discount, often $700 to $1,200 for a duplex.
The add-ons most base fees leave out
The biggest source of surprise on an inspection bill is the ancillary layer. A standard inspection does not test for radon, scope the sewer line, or sample for mold. On the Front Range those add-ons matter more than average, because the region sits in EPA Radon Zone 1, the highest-risk category:
- Radon test — $150 to $250. The inspector sets a continuous monitor for 48 hours. The EPA recommends fixing any home that tests at or above 4 picocuries per liter (pCi/L), and Zone 1 counties routinely exceed that. Pricing detail is in how much does radon testing cost.
- Sewer scope — $200 to $350. A camera run down the main lateral. Worth it on any home over 50 years old, where clay or cast-iron pipe may be root-intruded or collapsed. Finding a bad lateral before closing can save five figures.
- Wood-destroying-organism (WDO) report — $75 to $150. A termite/pest inspection required for most VA loans and some FHA files. Narrow scope, but a legal part of the closing package.
- Mold air sampling — $75 to $125 per sample as an add-on, more if a separate specialist is engaged. Generally only worth ordering when there is visible growth or a musty odor.
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Why quotes vary so much by region
The clearest reason two metros price the same house differently is licensing. Colorado does not license home inspectors; it is a credential-only market, so inspector supply stays high and fees stay moderately competitive. States that license inspectors — New York, parts of Florida, several Northeast metros — commonly quote $550 to $750 for a house that would cost $450 in Denver. Rural credential-only markets can dip to $300 to $400. None of this reflects quality; it reflects supply and regulatory overhead. When you compare quotes, compare them within your own metro, where legitimate offers for the same house usually land within about $100 of each other.
What the fee does not pay for
An inspection is visual and non-destructive. The inspector will not move furniture, pull carpet, cut drywall, or dismantle equipment. They do not engineer-stamp a foundation, certify a panel, or warranty how long any system will last. If a defect needs invasive testing or a licensed specialist — a structural engineer, an HVAC contractor — that is a separate engagement at a separate fee.
The most valuable page in the report is often the limitations section. If the attic was inaccessible under deep insulation, if the panel was locked, or if a crawlspace had standing water, the report says so. That tells you where the inspector could not look, which is exactly where you may want a follow-up before closing.
Budgeting for the whole package
Rather than budgeting the base fee alone, plan for the package you are actually likely to order:
- Older single-family (pre-1978): roughly $700 – $1,000. Base ($450) + radon ($200) + sewer scope ($275), plus a small contingency for extra sampling.
- Newer construction (post-2000): roughly $500 – $750. Radon still worth it in Zone 1; sewer scope optional.
The inspection is one of your first out-of-pocket costs after the earnest-money deposit, and payment is typically due the day of the inspection by card, check, or ACH. For the pre-purchase context specifically, see pre-purchase home inspection cost, and for interviewing inspectors before you commit, the hiring process guide walks through the vetting questions that matter.
When a cheap quote is the expensive one
A quote well under your local cluster usually signals one of three things: a brand-new inspector discounting to build a client base, a part-time inspector without full errors-and-omissions coverage, or a practitioner who underdelivers on report depth. The first can be fine if you accept a less-seasoned report. The second is a hard no — an uninsured inspector offers no recourse if a material defect is missed. The third only shows up after you have already paid.
The single best vetting move costs nothing: ask for a redacted sample report. A serious inspector shares one readily. A thin sample with few photos and sparse narrative is a warning sign no matter how low the price. A good report routinely pays for itself many times over when a roof, foundation, or sewer issue turns into a seller credit.
Frequently asked questions
How long does a home inspection take?
Most single-family inspections take three to four hours on site, with the report delivered in 24 to 48 hours. Homes over 3,500 square feet can run five to seven hours. More detail is in how long should a home inspection take.
Is radon testing included in the base fee?
No. The base fee covers structural, roof, plumbing, electrical, HVAC, and interior systems only. Radon ($150–$250), sewer scope ($200–$350), and WDO reports ($75–$150) are separately quoted add-ons.
Can I negotiate the inspection fee?
Rarely. Pricing reflects the inspector’s training, insurance, software, and time. Bundling several add-ons with the base inspection sometimes yields a small adjustment, but tipping is not customary and the quoted fee is the full expected payment.
Why is my quote higher than a friend’s in another state?
Most of the gap is licensing overhead and inspector supply. Licensed-inspector states typically run $100 to $200 higher than Colorado’s credential-only market for an identical house. Compare quotes within your own metro, not across state lines.
Figures reflect 2026 Front Range pricing and general US ranges; scope definitions follow ASHI and InterNACHI Standards of Practice, and radon guidance follows the EPA.