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How Much Does a Home Energy Audit Cost in Schertz?

A home energy audit in Schertz, TX typically runs between $250 and $650 for a standard diagnostic visit that includes a blower-door test – a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing – plus a written findings report. Homes above 2,500 square feet, or those requesting infrared thermography alongside the blower-door work, land closer to $500-$650. Most Schertz homeowners who contact us after reviewing their CPS Energy bills are looking at the $300-$450 range for a thorough single-family audit.

Home Energy Audit Cost Breakdown in Schertz (2026)

A home energy audit in Schertz is not a single, uniform product. What you pay depends almost entirely on which diagnostic tools the auditor uses and what they hand you when they leave. The table below reflects what Envelope Insulation Co. sees quoted across the Schertz, Cibolo, and Live Oak corridor in 2026.

The gap between a $150 visual walk-through and a $550 instrumented audit is real, and it matters. A visual inspection alone cannot tell you your home is losing 3,800 CFM50 of conditioned air through top-plate penetrations and recessed can lights – that number only surfaces when you pressurize the building. In Schertz’s climate zone 2B, where cooling loads run from April through October and attic temperatures routinely hit 140-155°F by July, an undetected air leak in the attic floor is not a minor comfort issue. It is a measurable load on your HVAC system. The blower-door number gives you the before figure. If air sealing work follows, the after number shows you what you actually paid for.

Under the Haven Standard, every audit Envelope Insulation Co. performs comes with a written price before anyone steps foot in your attic and a documented photo record when the crew leaves. There are no verbal estimates, no after-the-fact add-ons.

What Affects Home Energy Audit Pricing in Schertz

Six variables move the price in either direction for a Schertz home. None of them are arbitrary.

• Home size and footprint: A 1,400-square-foot patio home in Schertz’s Fairways at Scenic Hills section takes roughly half the time to pressurize and inspect as a 3,200-square-foot two-story in Homestead. Auditors generally price by square footage or by time-on-site, and larger homes with multiple HVAC zones cost more to test properly.
• Instrumentation used: A calibrated blower-door fan, duct blaster, and thermal camera are not the same service as a clipboard and a flashlight. Each piece of diagnostic equipment adds time and cost but also adds a number you can verify – which is why we document CFM50 readings before and after any air sealing work on applicable jobs.
• Attic access and condition: Schertz homes built in the 1990s in Woodland Oaks frequently have low-slope hip roofs with limited attic headroom and older fiberglass batt insulation that has shifted over the HVAC ducts. Getting an accurate blower-door depressurization requires proper door and window sealing throughout the home, which takes longer in irregular floor plans. Damaged or contaminated attic spaces (rodent activity is not uncommon in older Schertz homes near Cibolo Creek) add time to safely inspect and photograph.
• Duct system complexity: Homes with two or more HVAC systems – common in Schertz builds above 2,800 square feet – require separate duct blaster tests for each air handler. Each additional system adds $75-$150 to the audit price.
• Auditor’s documentation standard: A written report listing findings and a prioritized repair scope takes more time to produce than a verbal conversation at the curb. Envelope Insulation Co. includes a documented photo record on every visit – not as an add-on, not on request. That time is built into our price, which is why you see it in the written scope before anyone starts.
• Local climate timing: Schertz sits in Bexar and Guadalupe counties and is exposed to the same thermal cycling that affects greater San Antonio: extreme summer heat, brief but genuinely cold stretches in January and February, and humidity spikes in spring. Audits run during shoulder seasons (March-April, October-November) take place under conditions closest to design loads, which improves the accuracy of HVAC combustion analysis and thermal imaging. Some auditors charge less in off-peak windows, though the instrumented results are what matter.

What You Actually Get: The Audit Deliverables That Matter

Before you book any energy audit in Schertz, ask one question: what does the auditor hand you at the end of the visit? The answer separates a diagnostic service from a sales call with a flashlight.

At Envelope Insulation Co., every Home Energy Audit in Schertz closes with the same documented record: the before blower-door reading in CFM50 (cubic feet per minute at 50 Pascals of pressure differential), a written summary of every air leakage location found, a prioritized scope of recommended repairs, and a photo record of findings. On applicable jobs where air sealing follows the audit, we publish the after blower-door number so you can see the performance change you paid for. That is not a marketing claim. It is a single number that does not lie.

A blower-door reading of 4,500 CFM50 in a 1,800-square-foot Schertz home, for example, means the building is losing conditioned air at a rate roughly equivalent to leaving a 21-inch-square hole in the wall wide open. After top-plate sealing, can-light boots, and plumbing penetration foam in the attic floor, that number might drop to 2,100 CFM50. That is the kind of before-and-after documentation that tells you whether the work was worth doing – and it should be in writing before anyone starts.

Home Energy Audit vs. Insulation Inspection: What Schertz Homeowners Often Confuse

A lot of Schertz homeowners who call us after getting a high CPS Energy bill in August aren’t sure whether they need an audit or an insulation inspection. The distinction is practical.

An insulation inspection is a targeted look at what insulation is present, what depth and R-value it’s delivering, and whether it’s installed correctly. Envelope Insulation Co. includes this as part of any audit, but it can also be done as a standalone visit. The cost for a documented insulation inspection in Schertz is typically $75-$150, and on our jobs it’s rolled into the audit price rather than billed separately.

A full energy audit is broader. It looks at the entire building envelope – walls, attic, crawl space if applicable, windows, doors, ductwork, and mechanical systems – and quantifies air leakage with instrumented testing. If your attic has adequate insulation depth but the home still runs hot and the CPS bill is climbing, the problem is almost always air leakage, not R-value. The blower-door test finds it. An insulation inspection alone won’t.

In Schertz neighborhoods like Northcliffe and Ashley Place, we regularly see homes with R-38 attic insulation that read above 4,000 CFM50 on the blower-door because the insulation was installed over unsealed top plates and can-light boots. The insulation was doing its job; the air sealing had never been done. That’s a $400 audit finding that saves a homeowner from buying additional insulation they don’t need.

How to Save on a Home Energy Audit in Schertz

There are three concrete ways Schertz homeowners reduce what they spend on an energy audit without sacrificing the diagnostic accuracy they need.

Check your CPS Energy program eligibility first. CPS Energy, the primary utility serving most of Schertz’s 78154 and 78108 zip codes, has historically offered rebate-assisted or subsidized audit programs for residential customers. Program availability and income qualifications change year to year, so verify directly with CPS before booking a paid audit. If you qualify, out-of-pocket costs can drop to $0-$150.

Combine the audit with the repair work. When an audit leads directly to air sealing and insulation work in the same engagement, many contractors – including Envelope Insulation Co. – apply the audit cost toward the project total. The audit findings become the job scope, and there’s no redundant mobilization charge. For a Schertz homeowner who already suspects attic air leakage, this approach delivers the diagnostic documentation and the repair work for less than booking them separately.

Get a written second opinion on any estimate you’ve already received. Under Haven Standard, we offer a free second opinion on any written estimate. Bring us a competing quote – we’ll read through it with you, identify what’s included and what isn’t, and give you a written comparison. That costs you nothing and gives you a clearer picture of what you’re actually being asked to pay for. Call (830) 402-5240 to set that up.

Time the audit to shoulder season where possible. March through April and October through November are ideal windows in Schertz’s climate. Thermal imaging reads more clearly when there’s a meaningful temperature differential between indoor conditioned air and the attic or exterior. You’re also more likely to catch auditor availability without premium scheduling.

Ask specifically what the report includes before you book. A $175 visual inspection is not the same as a $375 blower-door audit. If a quote seems low, ask whether it includes a CFM50 reading, a written findings report, and documentation you can keep. If the answer is vague, the price may be low because the deliverable is thin.

Schertz-Specific Factors That Affect Your Audit Results

Schertz is not the same housing stock as a newer Boerne subdivision or an older San Antonio historic district. The local building patterns matter when interpreting audit findings.

A significant share of the Schertz housing stock was built between 1988 and 2005, during a period when attic insulation requirements under Texas building code were considerably more lenient than current IECC standards. Homes in Woodland Oaks, Schertz Estates, and the original sections of Country Club Village frequently have attic floors that were never air sealed at the top plates, can lights that vent directly into the attic, and original fiberglass batt insulation that has settled to R-19 or below. These homes show blower-door readings that routinely run 4,500-6,500 CFM50 on first test – well above the 2,500-3,000 CFM50 range typical for a well-sealed home of the same size.

Newer Schertz construction in Homestead, The Reserve at Schertz, and Crossvine developments built after 2015 tends to perform better on blower-door tests at initial audit – often reading in the 2,800-3,500 CFM50 range – but infrared imaging regularly reveals duct leakage into attic spaces that inflates cooling bills even when the envelope itself is reasonably tight.

The Cibolo Creek corridor also creates a local humidity variable. Homes within a half-mile of the creek in Schertz see elevated interior relative humidity during March-May, which can accelerate moisture infiltration through crawl space or slab-edge gaps that a standard visual inspection misses but a thermal camera catches during an audit.

After the Audit: What Typically Follows in Schertz

An audit’s value is only as good as what it tells you to do next. In Schertz, the three findings that come up most consistently – and that offer the clearest return on remediation cost – are attic floor air sealing, attic insulation depth correction, and duct sealing.

Attic air sealing in a typical Schertz home (1,600-2,400 square feet) runs $600-$1,400 depending on the number of penetrations, the condition of existing insulation, and whether insulation removal is required to access the top plates. At Envelope Insulation Co., air sealing is always done before insulation is added – not after, not simultaneously. Insulating over an unsealed attic floor is a documented waste of materials, and we won’t do it. That sequencing is non-negotiable under the way we work.

Attic insulation upgrades in Schertz, bringing a home from R-19 to R-38 or R-49, typically run $1,200-$2,800 depending on size, access, and existing conditions. Before any insulation work starts, you receive a written price and a written scope. When the crew leaves, you get a documented photo record. On jobs where air sealing was part of the work, you get the before and after blower-door numbers.

If the audit reveals duct leakage, duct sealing and mastic application is a separate scope – typically $400-$900 for a single-system home in Schertz. This is often where homeowners see the fastest reduction in their CPS Energy bills, because conditioned air being delivered to the attic rather than the living space is a direct dollar loss on every bill.

You can learn more about our full building envelope work on the home page, where the complete service line is listed alongside the Haven Standard commitments that apply to every job.

FAQs: Home Energy Audit Cost in Schertz

How much does a home energy audit cost in Schertz, TX in 2026?

A home energy audit in Schertz costs between $250 and $650 for most single-family homes in 2026, with the most common price point for a blower-door test plus written report landing between $300 and $425. Homes above 2,500 square feet, or those needing infrared thermography and duct blaster testing on multiple HVAC systems, run $450-$650. CPS Energy subsidy programs can reduce or eliminate out-of-pocket costs for qualifying residents in Schertz’s 78154 and 78108 zip codes. Call (830) 402-5240 and we’ll give you a written price before anyone shows up.

Is a home energy audit worth it in Schertz’s climate?

For a Schertz home with a cooling season that runs roughly April through October and attic temperatures above 140°F from June through August, a blower-door reading above 3,500 CFM50 typically means the HVAC system is compensating for air leakage that insulation alone cannot fix. The audit cost ($250-$575) identifies exactly where those leaks are. In homes we’ve audited in Northcliffe and Schertz Estates, the blower-door findings led to air sealing work that dropped CFM50 readings by 35-55% – a result that shows up on the next CPS Energy bill. Whether it’s worth it depends on your starting CFM50 number; that’s what the audit tells you.

Can I get a free home energy audit in Schertz?

Possibly, through CPS Energy’s residential programs. CPS has offered subsidized audit programs for customers in the San Antonio metro area, which includes most of Schertz. Program availability, income thresholds, and qualifying home types change year to year, so the most accurate answer comes from CPS Energy directly. Out-of-pocket costs through these programs have historically ranged from $0 to $150 for eligible participants. Envelope Insulation Co. also offers a free second opinion on any written estimate you’ve received – call (830) 402-5240 to arrange that at no charge.

How long does a home energy audit take in Schertz?

A blower-door test and written report on a 1,800-2,400 square foot Schertz home takes 2-3 hours on-site. Add infrared thermography and the visit extends to 3-4 hours. A full whole-house assessment including duct blaster testing on two HVAC systems typically runs 4-5 hours. After the visit, the written findings report takes an additional 24-48 hours to prepare properly. Any auditor who wraps a full instrumented assessment in under 90 minutes is either skipping steps or has a very small house to work with.

What’s the difference between a cheap audit and an expensive one in Schertz?

The price difference between a $125 visual audit and a $500 instrumented audit is almost entirely the testing equipment and the documentation. A visual inspection can flag obvious problems – missing insulation, disconnected ducts visible from the attic hatch, gaps around a chimney chase – but it cannot measure how much conditioned air the home is losing or locate hidden thermal defects in walls. The blower-door reading gives you a CFM50 number. The infrared camera shows you exactly where heat is moving through walls that look fine from the surface. If you’re considering air sealing or insulation work after the audit, the instrumented version pays for itself in diagnostic accuracy. Call (830) 402-5240 for a written quote on the right audit type for your home’s size and situation.

Key Takeaways

• Home energy audit cost in Schertz ranges from $250 to $650 for most single-family homes in 2026, depending on home size and instrumentation used.
• A blower-door test – the core diagnostic tool – costs $250-$375 as a standalone service and is the minimum needed to actually measure air leakage.
• CPS Energy subsidy programs can reduce costs to $0-$150 for qualifying Schertz residents; verify availability directly with CPS each program year.
• Older Schertz homes in Woodland Oaks, Schertz Estates, and Country Club Village regularly read 4,500-6,500 CFM50 on first blower-door test – well above the threshold where air sealing pays off clearly.
• Envelope Insulation Co. publishes before and after blower-door numbers on every applicable job, so you can verify the performance change you paid for.
• Every audit from Envelope Insulation Co. includes a written price before any work starts, a documented photo record at close, and a written findings report – under the Haven Standard, no exceptions.
• Wes Okafor leads the team at Envelope Insulation Co., and every job since 2016 has operated under the same written-price, documented-record standard.

Get a Written Audit Price for Your Schertz Home

If your CPS Energy bill has climbed without an obvious explanation, or if you’ve had insulation installed in the past but the home still runs hot, a blower-door audit gives you a number to work from rather than a guess. Wes Okafor and the Envelope Insulation Co. team have documented air leakage findings in more than 9,000 homes since 2016, every one with a written price before the work started and a photo record when the crew left.

Call (830) 402-5240 for a written estimate on a Home Energy Audit in Schertz. A live person answers – no voicemail loop, no callback window. We’ll review your home’s size, age, and zip code, tell you which audit type fits your situation, and give you a flat written price before anyone shows up. If you’ve already received a written estimate from another contractor, we’ll review it with you at no charge under the Haven Standard free second opinion.

The 365-Day Done Right Promise applies to every job we close: if it’s not done right, we make it right. That is in writing before anyone lifts a tool.

Pricing reflects the Schertz market as of 2026. Written by Wes Okafor, Owner at Envelope Insulation Co. (operating as Topside Attic Insulation Schertz), serving Schertz, TX since 2016. Topside Attic Insulation Schertz offers free estimates – call (830) 402-5240.