How much does an energy audit cost?

<div>An <a href="https://www.angi.com/articles/how-much-does-energy-audit-cost.htm">energy audit costs</a> about $420 on average, ranging from $100 to $2,250, depending on the size of your home, property, location, and the tests the auditor needs to perform. Keep in mind that the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit covers up to $150 of home energy audit costs. Common energy audit tests include:<ul><li>Blower door test: $350</li><li>Duct testing: $100</li><li>HERS test: $375</li><li>HERS certification: $200</li><li>Infrared imaging: $200</li></ul></div>

What does an energy audit include?

<div>The three levels of home energy audits include:<ul><li>Level 1: Review of your energy bills and home for signs of energy inefficiency and areas for improvement. The average cost range is $0.08 to $0.12 per square foot.</li><li>Level 2: A level 2 ASHRAE energy audit costs $0.12 and $0.35 per square foot. In-depth analysis of your energy usage and provides a report of cost-saving changes.</li><li>Level 3: Comprehensive analysis and detailed recommendations for ways to improve your home’s energy efficiency. A level 3 audit costs about $0.36 to $0.50 per square foot.</li></ul></div>

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Verified Reviews for Energy Efficiency Auditing pros in Oceanside, CA

*The Angi rating for Energy Efficiency Auditing companies in Oceanside, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.

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Last update on April 06, 2025

Reviewed in July 2024
Russel was such a professional and kind person to work with. Really knew his stuff and explained it all well to me. Job was done on time and I’m really happy with it
Guardian Home Energy
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Reviewed in July 2024
I reached out to Russell from Guardian Energy for getting a home energy audit done. I was glad to discover that he provided exactly the service I was looking for (unlike a competitor whom I also spoke with). During the inspection, Russell was extremely helpful in constantly sharing his...
Guardian Home Energy
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Reviewed in August 2020
Great service and professional, friendly attitude by technician Giovanni Russo! He explained why and how my AC needed improvements. He was mindful of my budget requirements and provided the company's senior discounts. I appreciated how thorough he was and his attention to detail in servicing my...
ASI Plumbing, Heating & Air
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Reviewed in October 2012
Last fall we decided to do the California Energy Upgrade including new dual furnaces and air conditioners, new ducting, new insulation, and whole house sealing for our 4,000 sf home. ASI had been servicing our old units for years, and we chose them for our upgrade. We couldn't be happier with...
ASI Plumbing, Heating & Air
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Reviewed in June 2015
After calling to request an energy audit and enhanced attic insulation, a representative came out to survey the site and prepare a proposal to replace heating ducts in the attic with R6 ducts, seal the attic from the house, and add 14? blown-in fiber insulation on top of the existing 8? of...
ASI Plumbing, Heating & Air
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Reviewed in January 2014
I purchased an Angie's List Big Deal for this service and it went pretty well. The company advertised a lower price for this service on their web site so I got it cheaper through them. I was pretty happy with the whole thing.
ASI Plumbing, Heating & Air
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Reviewed in June 2015
WOW! Never expected to have such a great experience. Matt came out & took measurements, made site drawings, gave me 3 options. Chose best the best quality equipment which because of additional rebates was the lowest cost! About 7:00a the 1st guy came & did air leakage tests, etc. Then...
ASI Plumbing, Heating & Air
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Reviewed in August 2013
Bashiri came to do an energy audit and gave us some great recommendations to lower our utility bill. The best part was he did not push options that only his company could provide. He was very professional and if we do have HVAC work we will definitely call this company again!!
ASI Plumbing, Heating & Air
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Reviewed in May 2013
From start to finish every person I came into contact with was very helpful, nice and knowledgeable. The arrived when they said they would, performed all necessary work and made sure the house stayed clean the entire time. Very professional. I will use them again for any electrical needs that...
ASI Plumbing, Heating & Air
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Reviewed in September 2013
Was highly impressed with the energy audit that ASI conducted on my house. The entire audit took about 3 hours to complete, but the technician was extremely thorough and took the time to explain what he was doing and why he was doing it. He did a very good job of laying down dropcloths...
ASI Plumbing, Heating & Air
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Energy efficiency auditors in Oceanside

Energy efficiency auditing services FAQs

An energy audit costs about $420 on average, ranging from $100 to $2,250, depending on the size of your home, property, location, and the tests the auditor needs to perform. Keep in mind that the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit covers up to $150 of home energy audit costs. Common energy audit tests include:

Blower door test: $350
Duct testing: $100
HERS test: $375
HERS certification: $200
Infrared imaging: $200

To find a reputable energy auditor, find a local company that offers energy audit services. Research the company’s reviews, methods, and certifications to find a reliable professional in your area. The most reputable energy audit companies are HEP-certified by the Building Performance Institute (BPI). Be sure to check our state licensing tool to review the local energy auditor guidelines to ensure you’re hiring a certified professional.

The difference between an energy auditor and a home inspector is primarily in the purpose of the inspection. The energy auditor conducts tests in your home to determine the energy efficiency levels in areas like windows, insulation, and doorways. The auditor then makes recommendations for ways to improve a home’s energy efficiency.

A home inspector examines various structures of your home to determine that everything is up to code and gauge the condition of features like the roof, foundation, HVAC, and electrical. The home inspector reports on the overall home and makes repair recommendations.

Typically, a local home energy auditor is responsible for performing energy audits. A home energy auditor will conduct one of three energy audits designed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to determine the energy efficiency of your home. The auditor often provides analysis that can help guide changes and improvements to your home for better energy efficiency, giving recommendations as necessary.

The three levels of home energy audits include:

Level 1: Review of your energy bills and home for signs of energy inefficiency and areas for improvement. The average cost range is $0.08 to $0.12 per square foot.
Level 2: A level 2 ASHRAE energy audit costs $0.12 and $0.35 per square foot. In-depth analysis of your energy usage and provides a report of cost-saving changes.
Level 3: Comprehensive analysis and detailed recommendations for ways to improve your home’s energy efficiency. A level 3 audit costs about $0.36 to $0.50 per square foot.

The homeowners guide to energy efficiency auditing services

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