Home Energy Audit Cost - Same-Day Service, Done Right the First Time

How Much Does Home Energy Audit Cost in San Antonio?

A home energy audit in San Antonio typically costs between $150 and $550, with most homeowners paying around $300 to $400 for a comprehensive whole-house assessment from a certified auditor. Utility rebates through CPS Energy can knock that down by $50 to $150, and some insulation contractors in San Antonio offer discounted or free audits when you book insulation work with them.

We’ll break down exactly what you’re paying for, what drives the price up or down, and how to keep more of that money in your pocket. Laurel Attic Insulation San Antonio has been doing this work since 2003, and Chase Whitaker, our owner, has seen pricing shift with new testing equipment and evolving building codes across Bexar County. If you want the short version: call (254) 279-0971 for a free estimate and you’ll know within minutes whether an audit makes sense for your home.

Home Energy Audit Cost Breakdown (2026)

Here’s what you can expect to pay in San Antonio right now, based on the type of audit and who performs it:

The spread comes down to equipment, time, and certification. A blower door test alone requires a calibrated fan, pressure gauges, and about 45 to 90 minutes of setup and measurement. Infrared cameras that show thermal bridging through your Alamo Heights or Stone Oak ceiling add cost because the equipment itself runs $2,000 to $10,000. When an auditor carries BPI or RESNET certification, you’re also paying for their training and the liability they take on when they make retrofit recommendations.

What Affects Home Energy Audit Pricing in San Antonio

• Home size and layout. A 900-square-foot bungalow in Jefferson takes an hour to test. A 3,200-square-foot two-story in Dominion takes three. More square footage means more time at the blower door, more rooms to scan, more duct runs to inspect.
• Number of HVAC systems. Homes with two or three separate air handlers (common in San Antonio additions) double or triple the duct leakage testing. Each system needs its own pressure test and inspection.
• Audit depth and certifications. A visual walkthrough costs less than a full BPI-certified audit with combustion safety testing. If you have gas appliances, the combustion test matters, and it costs more because the auditor is checking for carbon monoxide risk, not just drafts.
• Age of the home. Pre-1980s San Antonio homes, especially around Monte Vista and Government Hill, often have balloon framing, zero wall insulation, and original single-pane windows. Auditors spend more time documenting thermal bypasses in older construction.
• Time of year. Summer audit scheduling is tight. When temperatures hit 100 in July and August, demand spikes. Some companies charge a seasonal premium of $25 to $75. An auditor testing on a mild October morning in San Antonio gets cleaner infrared readings than one fighting a 105-degree attic heat soak.
• Rebates and program requirements. Some CPS Energy rebate programs require a specific audit protocol before you can qualify for insulation or HVAC incentives. That protocol costs what it costs, and it’s not negotiable.

Can You Get a Home Energy Audit for Free in San Antonio?

Sometimes. CPS Energy periodically runs low-cost or free audit programs for qualifying customers, usually targeted at homes with high energy usage or income-qualified households. Availability changes by year and funding. The answer-first version: yes, free audits exist, but they’re often limited in scope and may not include blower door testing.

The second way to get a free audit is to bundle it. Laurel Attic Insulation San Antonio offers a no-cost energy assessment when you move forward with attic insulation work. Here’s how it works practically: you call (254) 279-0971, we schedule a visit, our technician does the full attic inspection with thermal imaging, and if the insulation work makes sense, the audit line item disappears from your final written price. You get the data either way.

One thing to understand about “free” utility audits: the report often reads like a checklist. “Add weatherstripping. Consider a smart thermostat. Insulate if needed.” A paid audit from a contractor who actually installs the fixes gives you measurements, not suggestions. You’ll know the exact R-value in your attic, the exact CFM50 leakage number from the blower door test, and what it will cost to fix each problem in San Antonio dollars, not national averages.

What a San Antonio Energy Audit Actually Measures

When you pay $350 for an audit, here’s what you’re buying. The auditor sets up a blower door in your front or back entry, depressurizes the house to 50 pascals, and measures how many cubic feet of air leaks out per minute. That number, called CFM50, tells you how leaky the building envelope is. San Antonio homes built before 2000 often test at 2,500 to 4,000 CFM50. Tight new construction runs under 1,500.

The infrared scan comes next. In the summer, the auditor looks for hot ceiling streaks where attic insulation has settled or was never installed deeply enough. Around Northeast San Antonio, where 1990s tract housing dominates, we routinely find attics with R-19 rated on paper that measure closer to R-11 in reality because the fiberglass got compressed or wind-washed over 30 years.

Duct leakage testing is the third component. The average San Antonio home loses 20 to 30 percent of conditioned air through leaky duct joints, often in the hot attic above your ceiling. That’s money moving from your thermostat straight into the Texas sun. An audit quantifies exactly how much, and that number becomes the business case for sealing or replacing ducts.

A proper audit is a diagnostic service, not a sales pitch. Chase Whitaker has trained our team to write reports that homeowners can act on, whether they hire Laurel for the fix or not. If you want a deeper look at how we approach the whole process, read our Home Energy Audit in San Antonio page.

How to Save on Home Energy Audit

The biggest saving tactic in San Antonio is simple: schedule the audit when you’re already planning insulation work. Most contractors, including us, credit the audit fee toward the project. You’re not skipping the diagnostic, you’re just not paying for it as a separate line item.

Second tactic: check the CPS Energy website for current rebate cycles before you pay full price. The programs rotate. Sometimes the utility covers a chunk of the audit, sometimes they cover insulation or HVAC upgrades and leave the audit to you. If you call us at (254) 279-0971, we’ll tell you what’s currently active for your zip code, because our schedulers track that weekly.

Third: don’t over-buy the audit. A comprehensive BPI-certified test is worth the money for a home built before 1990 or one where you suspect real air leakage problems. But if you live in a 2015 or newer house, a basic contractor audit around $200 will find most actionable issues. Newer San Antonio construction has code-mandated insulation minimums and tighter envelopes. You’re unlikely to need the full forensic treatment.

Fourth: ask for a written price before anyone shows up. If a San Antonio company won’t give you a number on the phone, move on. Every Laurel audit includes a written price before work starts, and the technician arrives at a live, trackable arrival time. No four-hour windows. You’ll know when we’re pulling up.

Is a Home Energy Audit Worth It in San Antonio?

If your monthly CPS Energy bill runs above $250 in summer, the answer is almost always yes. A $350 audit that finds $1,200 in annual savings from air sealing and attic insulation pays for itself in under four months. Even if you spend $500 on the audit and save $40 a month, you break even in about a year.

San Antonio has specific conditions that make audits unusually valuable here. Summer attic temperatures in our area regularly hit 150 degrees. That heat load pushes down through your ceiling at a rate determined by your attic’s R-value, which is the number that measures how well insulation slows heat transfer. Most San Antonio homes built before 2010 have R-30 or less. Current Department of Energy guidance for our climate zone is R-49 to R-60. The gap between those numbers is your potential savings, and an audit measures it precisely.

Homeowners around Leon Valley and Shavano Park ask us whether they should audit before or after replacing windows. The answer: audit first. Windows are rarely the biggest problem in San Antonio attics. A $12,000 window replacement might save you $25 a month. A $2,000 attic insulation upgrade might save you $60. The audit tells you which problem to solve first, before you spend money in the wrong order.

If you’re starting from scratch with home comfort questions, our home page lays out the services we offer and how the Relay Visibility Guarantee works on every job.

FAQs – Home Energy Audit Cost

How much should I pay for a home energy audit in San Antonio?

Plan on $150 to $400 for a contractor audit, or $300 to $550 for a comprehensive BPI-certified audit. Utility program audits through CPS Energy run $0 to $150. If a San Antonio company quotes you above $600 for a residential audit, ask for a line-item breakdown because that’s above market for anything short of a large custom home.

Is it cheaper to audit or just add insulation?

Adding insulation without an audit costs $900 to $2,400 for a typical San Antonio attic, but you’re guessing at the R-value you actually need. An audit at $300 to $400 answers the question for sure. In our experience, about one in four San Antonio attics we inspect actually needs air sealing more than insulation, which a blind insulation add would completely miss.

Does CPS Energy pay for energy audits?

Yes, through rotating rebate and program offerings. The specifics change by funding cycle, so there’s no guaranteed number year to year. Some years CPS funds full audits for qualifying customers, other years they offer rebates on the improvements instead. Call (254) 279-0971 and we’ll check what’s active for your neighborhood before you pay anything.

How long does a home energy audit take in San Antonio?

Expect 90 minutes to 3 hours depending on house size and whether duct testing is included. A full audit with blower door, infrared scan, duct leakage testing, and combustion safety check on a 2,000-square-foot home usually runs about 2 to 2.5 hours. Larger homes with multiple HVAC systems take longer.

Can I do my own home energy audit for free?

You can walk your attic in the evening with a flashlight and check for insulation depth, but you can’t replicate a blower door test or an infrared scan with a smartphone app. The free DIY audit finds obvious gaps. The paid audit quantifies the invisible air leakage that costs you money every summer. If you want the real numbers, a professional test is the only path.

What a Laurel Attic Insulation Audit Includes

When you schedule with us, here’s exactly what happens. You call (254) 279-0971 and talk to a live person, 24/7, no voicemail queue. We give you a written price for the audit before anyone steps foot in your home. On audit day, a background-checked, uniformed technician arrives at a live, trackable arrival time. You see us coming on your phone.

The technician tests what matters: attic insulation depth, R-value effectiveness, air leakage points, duct condition, and ventilation. You get before-and-after photos of anything we find. The report includes specific retrofit recommendations with dollar figures attached, and if you choose Laurel for the insulation work, the audit fee is credited back.

Every audit is backed by our 365-Day Done Right Promise: if the assessment misses something material within a year, we re-inspect at no charge. If any of our insulation work fails, the free second visit is on us, no argument. Laurel stays green all year, so should your home’s comfort. That’s the idea behind the name, and the standard we’ve run since 2003 as part of the Relay Home Co. family.

Pricing reflects the San Antonio market as of 2026. Laurel Attic Insulation San Antonio offers free estimates – call (254) 279-0971.

Written by Chase Whitaker, Owner at Laurel Attic Insulation San Antonio, serving San Antonio since 2003.