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Home Energy Scope · Cost calculator
Energy audit cost calculator: size the assessment before the retrofit
This calculator estimates the cost of a professional home energy assessment from conditioned floor area, the diagnostic scope, and the complexity of the house, then adds optional tests such as duct leakage, thermal imaging, combustion safety and a post-work test-out. It is anchored to Angi's 2026 benchmark of $437 on average. It prices the assessment only, not the retrofit work.
Skip to the calculatorBase rates are anchored to: Angi, How Much Does an Energy Audit Cost (2026); HomeAdvisor, Home Energy Assessment Cost (2026); Fixr, Energy Audit Cost (2025); Pearl Certification, Home Energy Audit Cost 2026 Statistics (2026).
By the numbers
Cost benchmarks behind the calculator
$437
average home energy assessment cost, typical range $212–$698 (Angi, 2026)
Angi's cost guide, updated April 2026, prices the assessment only. It does not include insulation, windows, solar or a whole-house retrofit; ask which diagnostic tests are included.
Angi, How Much Does an Energy Audit Cost (2026)$437
average professional home energy audit cost, range $212–$698 (HomeAdvisor)
Basic walk-throughs run $150–$200 while full diagnostic audits with blower door ($350), duct test ($100) and thermal imaging ($200) reach $500–$900.
HomeAdvisor, Home Energy Assessment Cost (2026)$250
national average energy audit cost, range $145–$420; blower door $150–$450
Fixr's average for a standard audit on a 1,200 square foot home includes a blower door test. Utilities often subsidize audits, so check before paying retail.
Fixr, Energy Audit Cost (2025)436,798
U.S. homes that received a HERS Index score in 2024, up 18%; average score 55
RESNET's registry passed 4.4 million rated homes. A HERS score gives buyers and sellers a standardized efficiency number, and 2024's rated homes are projected to save $398 million a year in energy bills.
RESNET (2025)Angi's 2026 guide puts a home energy assessment at $437 on average with a typical range of $212 to $698, and HomeAdvisor's June 2026 figure matches at $437 with walk-throughs at $150 to $200 and full diagnostic audits at $500 to $900. Fixr's average of $250 describes a standard audit on a 1,200 square foot home. Spreading the Angi average over a typical 2,000 square foot house gives about 22 cents per square foot, which is the base rate here.
Enter floor area, pick the scope and complexity, add the tests you want, and read the assumptions under the result. Then check whether your utility subsidizes the assessment; many do, and that can bring the retail figure to zero.
Why size the audit by floor area?
Because the auditor's time scales with the house: more rooms to walk, more attic and basement to inspect, more surfaces to scan, and often more than one HVAC system to test. The relationship is weak below about 1,200 square feet, where setup time dominates, and strong above 3,000, where a second system and multiple attics are common. Attics alone add time: by our analysis of EIA 2024 survey data, 47.6% of homes have one and 85.6% of those are unfinished spaces the auditor enters and inspects. The three complexity levels adjust for that.
How the scope tiers change the number
A walk-through is a visual inspection with a bill review and a checklist, priced by HomeAdvisor at $150 to $200; it finds the obvious and misses the measurable. A standard audit adds a blower door and infrared spot checks and produces a written report with measured leakage; it matches Angi's benchmark. A comprehensive audit adds duct leakage testing, full thermal imaging and combustion-safety testing, reaching HomeAdvisor's $500 to $900, and is the right choice for homes with gas appliances, attic or crawlspace ducts, or persistent problems such as the constant drafts our EIA analysis finds in 13.8% of homes.
The add-ons let you build the comprehensive scope piece by piece where a standard audit is the base. HomeAdvisor prices the components at roughly $350 for a blower door, $100 for a duct test and $200 for thermal imaging. A post-work test-out, priced by Fixr's $150 to $450 blower door range, verifies that an insulation contractor's air sealing met the target and is worth requesting whenever envelope work follows.
What the calculator leaves out
The retrofit itself. HomeAdvisor's 2026 attic insulation average of $2,100, the $7,347 whole-home window project, and solar at $2.60 per watt are on the service pages with their sources, and they are quoted per house. Also excluded: a HERS rating, which is a separate product from a RESNET rater; utility subsidies, which vary by provider; and travel charges in rural areas. The walk-through versus diagnostic comparison helps choose the tier.
Reading a quote against the result
If an audit quote is far above the range, ask which tests are included and whether the report includes modeled savings or a rating. If it is far below, ask whether a blower door is included and whether a written report with measured results is delivered; a $99 assessment is usually a walk-through leading to a sales visit. Take the result and its assumptions to the contact page so auditors quote the tier you want.
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Cost calculator questions
Is $437 a lot to pay for an audit?
Against the return, no. Pearl's 2026 statistics, citing Angi, put savings from acting on audit findings at about $685 a year, a payback of roughly seven months, and a professional audit identifies about 35 problems versus 12 for a DIY check. Against a utility-subsidized audit, retail can be a lot; check your utility first.
Should I always choose the comprehensive tier?
Choose it when the house has gas appliances, ducts in an attic or crawlspace, or symptoms that a standard audit has not explained. A standard audit with blower door and a written report suits most homes as a first step. A walk-through is only worth it as a free utility offering or for a single visible problem.
Why is the walk-through multiplier so low?
Because HomeAdvisor prices walk-throughs at $150 to $200 against a $437 average for audits with instruments. The lower price reflects the absence of a blower door, which is the tool that turns an opinion into a measurement. Treat a walk-through as a screening, not a diagnosis.
Does the calculator include a HERS rating?
No. A HERS Index score is a separate product from a RESNET-certified rater using modeling software, most common on new construction and useful at resale; RESNET reports 436,798 homes were rated in 2024. Ask an auditor who is also a rater for a combined price if you want both.
What if a utility offers a free audit?
Take it, then ask what it includes. Some utility audits are full diagnostic visits with direct-install measures; others are checklists that lead to a rebate enrollment. If the free visit lacks a blower door and a written report with measured results, use the calculator's standard tier as the price of getting those from an independent auditor.
How long does the visit take?
The days figure assumes a standard audit on a moderate house takes roughly half a day on site, with the report following within a week. Comprehensive audits on large or complex homes can take a full day. Walk-throughs take an hour or two.
Can I get the retrofit priced from the audit report alone?
Often for attic insulation and air sealing, where the report states depth, area and leakage; contractors may quote from it with a brief confirmation visit. Windows and solar need their own site visits for measurements and roof assessment. Sharing the report with every bidder is the best way to make their proposals comparable.
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Price a specific service
Service guideHome Energy AuditsA home energy audit connects comfort complaints and utility bills to the measured condition of the house through a blower door test, thermal imaging, duct leakage testing and combustion-safety checks, then delivers written, prioritized recommendations.
Service guideInsulation & Air SealingAir sealing closes the gaps that move air through the attic plane, rim joist and penetrations; insulation slows heat conduction through the assemblies around them.
Service guideWindow & Door ReplacementWindow and door replacement addresses openings with a defined problem: damage, failed seals, poor operation, drafts, single-pane glass in a cold climate, or a door that leaks and does not latch.
Service guideSolar Panel InstallationSolar panel installation covers the roof and shading assessment, equipment selection, electrical and structural permits, utility interconnection and the production and financial assumptions in the proposal.
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