Inspection Cost: Home, Radon, Mold and Sewer Prices

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Buying, selling or maintaining a home can involve several different inspections, each priced separately. A general home inspection is the anchor, but radon, mold, sewer lines, asbestos, termites and specialty systems all have their own specialists and fees. Knowing the typical inspection cost for each one makes it easier to budget before an offer, decide which add-ons are worth it, and spot a quote that looks too thin. This guide gives broad 2026 price ranges, explains what drives them and what a standard inspection actually covers, and looks at when bundling saves money. The figures here are rough ranges commonly seen across U.S. markets, including the Colorado Front Range. They vary by company, home and season, and they are not quotes. Confirm current pricing directly with local providers before scheduling.

Part of our Home Inspections Explained guide — start there for the full picture →

Typical Inspection Cost by Type

The table below summarizes common inspections and their usual price bands. Each range is hedged and reflects typical residential work, not complex or unusual properties. Front Range prices tend to fall within or somewhat above national ranges, but individual quotes can sit well outside them.

For a closer look at general inspection fees by home size and age, see the dedicated home inspection cost guide, and for Front Range pricing patterns, home inspection cost in Colorado.

General Home Inspection: What It Covers and Costs

The general inspection is the one most buyers schedule first. It is a broad, non-invasive look at the home’s major systems, not a code inspection or an appraisal.

What a standard inspection includes

The American Society of Home Inspectors (ASHI) publishes a Standard of Practice that defines the minimum scope for its members. ASHI’s own explanation of that standard notes that sections three through twelve identify the systems and components an inspector must inspect, and that Section 2.2.A directs inspectors to inspect systems and components that are visually observable, readily accessible and installed. ASHI also notes the standard requires a written report but does not dictate format, and that many sections, especially Section 13, spell out what is outside the scope. In practice, that means an inspector reports what can be seen and safely reached, operates normal controls, and does not open walls, move heavy furniture or perform specialized testing.

That scope matters for budgeting. Radon, mold sampling, sewer camera work, asbestos sampling and most pest inspections are not part of a standard general inspection. They are add-ons, often performed by the same company for an extra fee, or by separate specialists.

What drives the general inspection price

• Square footage. Larger homes take longer to walk, test and report on. Many companies price in size bands.
• Age. Older homes often have more systems with a history of changes, such as mixed wiring, older plumbing materials and later additions. Some inspectors add a surcharge for homes past a certain age.
• Foundation type. Crawlspaces take extra time and effort compared with a slab or a finished basement.
• Additional structures. Detached garages, guest units and outbuildings can add to the fee.
• Travel distance. Rural and mountain properties may carry a travel charge.
• Report turnaround. Rush reports may cost more.

Condos are usually less expensive to inspect because common elements such as the roof and exterior may be outside the unit’s scope. A 1920s bungalow with a crawlspace and a detached garage, on the other hand, may cost noticeably more than a newer home of the same size.

Why it is usually worth it

The Consumer Financial Protection Bureau (CFPB) advises buyers not to buy a home without having it thoroughly inspected, and to schedule an independent inspection as soon as possible after choosing a home, so there is time to resolve problems and complete any additional inspections. The CFPB notes that if a purchase contract is contingent on a satisfactory inspection, the buyer can cancel without penalty if not satisfied, and that inspection findings can support negotiating repairs or credits with the seller. Compared with the price of a home, the inspection fee is small, and one significant finding can easily outweigh it.

The CFPB also points out that a home inspection is different from an appraisal, and that buyers generally need both when borrowing. The appraisal supports the lender’s valuation; the inspection is for the buyer’s own understanding of condition.

Add-On and Specialty Inspection Costs

Most of the variation in a buyer’s total inspection budget comes from add-ons. Which ones make sense depends on the home’s age, location, construction and what the general inspection finds.

Radon testing

Radon is a common concern along the Front Range, and testing is one of the least expensive add-ons. The EPA’s A Citizen’s Guide to Radon describes testing as inexpensive and easy, notes that low-cost do-it-yourself test kits are available by mail and in some hardware and retail stores, and says that people buying or selling a home may prefer to hire a qualified tester. The guide recommends contacting the state radon office for a list of qualified testers, and explains that short-term tests are the quickest option, while long-term tests give a better picture of a home’s year-round average.

In a real estate transaction, a professional test with a continuous monitor is common because both parties want a defensible result within the inspection period. The radon testing cost guide compares DIY kits, professional tests and what each typically includes.

Mold inspection and testing

Mold inspections usually start with a visual and moisture assessment, sometimes with a moisture meter or thermal camera, and may include air or surface samples sent to a lab. Pricing often rises with the number of samples.

Sampling is not always necessary. The EPA states that in most cases, if visible mold growth is present, sampling is unnecessary, and that because no EPA or other federal limits have been set for mold or mold spores, sampling cannot be used to check a building’s compliance with federal mold standards. The EPA does say surface sampling may help confirm whether an area has been adequately cleaned or remediated, and that sampling should be done by professionals with specific experience in designing sampling protocols and interpreting results. That guidance can help buyers decide whether to pay for lab work or put the money toward finding and fixing the moisture source. See the mold testing cost guide for more on sampling fees.

Sewer scope

A sewer scope sends a camera through the main line from the house to the street or septic connection. Older Front Range neighborhoods with clay or cast iron lines, mature trees, or a history of backups are common candidates. Price depends on access, line length and whether a cleanout is available; pulling a toilet to gain access can add cost. Repairs to a main line can be expensive, which is why many buyers treat a scope as inexpensive insurance. The sewer scope inspection cost guide covers typical fees and what the video can and cannot show.

Asbestos testing

Asbestos testing is usually relevant for homes built before the 1980s, especially before a renovation that will disturb flooring, ceiling texture, duct tape or pipe insulation. A certified inspector collects samples and sends them to a lab; pricing often depends on how many samples are needed and how fast results are required. Testing does not usually belong in a standard pre-purchase inspection unless a specific material raises concern. The asbestos testing cost guide explains per-sample pricing and when a broader survey is needed.

Termite and WDO inspections

Wood-destroying organism inspections focus on termites, carpenter ants, wood-boring beetles and related damage. Some lenders and loan programs require them in certain areas, though termite pressure along the Front Range is generally lower than in warmer, more humid regions. Pest companies sometimes offer these inspections at a low price or as part of a service plan, while some home inspectors offer them as an add-on.

Other specialty inspections

• Roof inspection. Useful for older roofs, hail-damaged roofs or roofs the general inspector could not safely walk. Hail is a frequent Front Range concern.
• Chimney inspection. A video inspection of the flue can reveal cracks or deterioration not visible from the firebox.
• HVAC evaluation. A licensed technician can assess furnace heat exchangers, combustion and system age more deeply than a general inspection.
• Structural engineering. Recommended when there are signs of foundation movement, significant cracking or expansive soil issues, which are common in parts of the Front Range.
• Well and septic. Relevant for rural and foothill properties; may involve water testing, flow testing and tank pumping.
• Lead-based paint. Relevant for homes built before 1978, particularly with young children in the household or renovation planned.

Specialty fees vary more than any other category, because the providers range from single-system technicians to licensed engineers.

What Drives Inspection Pricing Overall

Across every inspection type, a handful of factors explain most of the differences between quotes.

• Time on site. Larger, older and more complex homes simply take longer.
• Equipment. Continuous radon monitors, sewer cameras, thermal cameras and lab analysis all carry costs that show up in fees.
• Credentials and insurance. Certified specialists, engineers and inspectors carrying errors-and-omissions insurance may charge more.
• Lab fees and turnaround. Mold and asbestos samples are often billed per sample, with surcharges for fast results.
• Demand and season. Busy spring and summer markets can push prices up and lengthen wait times.
• Travel. Mountain and rural properties may carry travel fees.
• Report depth. Detailed reports with photos, video and summaries take more time to produce.

Credentials are worth checking regardless of price. The CFPB notes that, depending on the area, home inspectors may not be required to be licensed, and suggests asking for references from prior customers and checking with the Better Business Bureau and the state or county licensing authority. At the time of writing, Colorado does not license general home inspectors at the state level, so professional association membership, experience and references carry extra weight for Front Range buyers.

Bundling Inspections to Save Money

Many inspection companies offer packages that combine a general inspection with radon, sewer scope, thermal imaging or WDO checks. Bundling can lower the per-service price because the inspector is already on site, and it can simplify scheduling within a tight inspection window.

Some practical points about bundles:

• Compare line items. A package price is only a good deal if each component is something the home actually needs.
• Check qualifications for each service. A general inspector offering radon or mold sampling should be able to explain their training and method for that service.
• Watch timing. Radon tests need time to run, and lab results for mold or asbestos may take days. Schedule early so results arrive before the contingency deadline.
• Consider independence. The CFPB stresses an independent inspector who is accountable to the buyer, and warns that an inspector paid by someone else, or not paid until closing, might underemphasize problems.

Sellers can benefit from bundling too. A pre-listing inspection paired with a radon test and sewer scope can surface issues before a buyer’s inspection does, giving the seller time to repair, price accordingly or disclose with documentation.

Is the Inspection Cost Worth It?

For most buyers, yes. A general inspection plus the add-ons that fit the home usually costs a small fraction of a percent of the purchase price, and the information can affect the decision to buy, the negotiation, and the repair plan for the first few years of ownership.

Where the value is less obvious:

• Testing that will not change the decision. Mold sampling when visible growth is already present may add cost without adding information, as the EPA notes.
• Redundant specialist visits. If the general inspector already found a roof problem, a separate roof inspection may be better timed as a repair estimate.
• Very new construction. Some buyers still choose to inspect new homes, and pre-drywall and final walkthrough inspections can catch builder issues, but the add-on list is usually shorter.

Buyers on a tight budget can prioritize. In much of the Front Range, a general inspection, a radon test and a sewer scope on older homes cover the most common big-ticket surprises. Asbestos, mold and engineering evaluations can be added when the home’s age or the general inspection points to them.

Who Pays and When Inspection Costs Come Due

In a typical purchase, the buyer orders and pays for the inspections, because the inspections exist to protect the buyer’s decision. Payment is usually due at or before the appointment, separate from closing costs. That timing matters: if a deal falls through after inspections, the fees are generally not refunded, so buyers sometimes stage inspections, starting with the general inspection and adding specialists only if the home still looks like a good fit.

Staging has a cost of its own, because inspection contingency periods are often short. Radon tests need at least a couple of days to run, sewer scope companies may be booked out in busy months, and lab results can take several business days. Many buyers schedule the general inspection, radon test and sewer scope together on the first available day, then add mold, asbestos or engineering evaluations only when the first round of findings calls for them.

Sellers pay when they order a pre-listing inspection or when a repair agreement requires follow-up work such as a radon retest after mitigation or a sewer line repair verification. New-construction buyers may pay for phase inspections, such as a pre-drywall inspection before walls close and a final inspection before the builder walkthrough, in addition to or instead of a single general inspection.

Homeowners who are not buying or selling also pay for inspections from time to time: a radon retest every few years or after renovations, a sewer scope after recurring backups, a mold assessment after a leak, or asbestos testing before remodeling. These one-off visits often cost a little more per service than a bundled purchase package, because the provider is making a dedicated trip.

How Home Size and Age Change the Total

Size and age affect more than the general inspection fee. They also influence which add-ons are sensible, so they tend to move the overall inspection budget in the same direction.

A newer home on a slab, built after the 1980s, often needs only a general inspection and a radon test, with a sewer scope as an option. The total stays relatively modest.

A mid-century home, common across much of Denver, Lakewood, Arvada and Colorado Springs, more often justifies a sewer scope because of older line materials and tree roots, and may call for asbestos testing if flooring, ceilings or ductwork will be disturbed. Its general inspection may cost more because of age-related surcharges.

A pre-war home, a large custom home or a property with a crawlspace, outbuildings, a well or a septic system usually carries the highest total, since more specialists are involved and each visit takes longer.

Tips for Comparing Inspection Quotes

• Ask exactly what is included and excluded, and whether the inspector follows a published standard such as ASHI’s.
• Request a sample report to judge photo quality, clarity and how findings are prioritized.
• Confirm how long the inspection takes and whether the buyer can attend. The CFPB encourages attending if possible, since it makes the report easier to interpret.
• Check insurance, references and complaint history.
• Ask how add-on results are delivered and how long they take.
• Be cautious of prices far below the local market, which can signal rushed inspections or minimal reports.

More background on choosing inspectors is available in the hiring process guides and the home inspection basics hub.

References

• Standards of Practice — American Society of Home Inspectors
• Schedule a Home Inspection — Consumer Financial Protection Bureau
• A Citizen’s Guide to Radon — U.S. Environmental Protection Agency
• Mold Testing or Sampling — U.S. Environmental Protection Agency

Planning inspections for a Front Range purchase or sale and not sure which add-ons fit the home? Get in touch and we can help you sort out a sensible inspection plan.