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Top-Rated Energy efficiency auditors in Angwin - Updated Nov 2026

Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)
Energy Audit - For BusinessHome Energy Audit

Serving Angwin, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We recently had Mega Power Electric Inc install a solar system and panels. The President and provided excellent communication all the way through the process. He even met with us after installation to explain the almost incomprehensible PG&E bill. Although not the least expensive bid, his was competitive and I felt he was as interested in educating me about solar and the various types of panels and inverter systems as he was in selling a system. He demonstrated how the array of panels would meet our energy needs and as opposed to some of the other companies, wasn't selling us more than we needed. We are very satisfied with our solar system and I highly recommended Mega Power Electric Inc."
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+32

Recommended by100%of homeowners
Avatar for SunRun LLC
SunRun LLC
5.0(
12
)
Energy Audit - For BusinessHome Energy Audit

Serving Angwin, CA and surrounding areas

In business since 2007

Free estimates

"Spectacular! I had solar installed and Trevor was super helpful with the process. He made all the complicated paperwork easy. Just like that we have solar and I'd never go back! Double thumbs up for Trevor!"
Install!
Start saving on electric charges
Install in San Diego
Wonder What We Do??
Additional Photos

+8

Recommended by100%of homeowners
Avatar for Landmark Energy Upgrades
Landmark Energy Upgrades
4.8(
59
)
Energy Audit - For BusinessHome Energy Audit

Serving Angwin, CA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"The reviews below me said it best: Ezra was fantastic! He was prompt, professional, and very informative. He explained to me each of the things he was doing, what he looked for in an audit, and what to expect. He also answered all of my questions about the kind of improvements that were worth it and those that were a waste of money. We were required to have an Energy Audit to sell our home and our realtor recommended Ezra from Landmark construction & energy crew. Lucky for us, Ezra found no recommendations and gave us a good "bill of health." What I like more is that if he does have recommendations, he doesn't perform any work himself, providing a truly unbiased opinion.  I fully plan on having Ezra perform an audit of our next home, whether it is required or not."
Cool Roof Install
Energy Upgrade
HVAC Air Duct
Home Energy Audit
Energy Upgrade Contractors

+6

Recommended by98%of homeowners
Avatar for Green NRG Inc.
Green NRG Inc.
4.1(
62
)
Energy Audit - For BusinessHome Energy Audit

Serving Angwin, CA and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

"We are so happy with our solar panels and knowing we are utilizing the sources naturally given to us to acquire energy. We are hoping to see the difference it will make on our bill. The team and company at Green NRG involved have made this process so easy and educational they have been incredible to work with. I can't say between the professionalism when I called with questions they were great. We would recommend you without hesitation as we are 110% satisfied."
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+12

Recommended by90%of homeowners
Avatar for Johnson Electric Solar
Johnson Electric Solar
5.0(
5
)
Energy Audit - For BusinessHome Energy Audit

Serving Angwin, CA and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"We did a total remodel of my husband's family home.   It took over six months.  Our next door neighbor is Andre Johnson who is starting up his own solar panel installation out of his home.  He has been in the business for  years, but felt now was the time for him to start his own business.  After we moved in, we talked to him about solar installation...we got some other bids, but his was still the best.  He and his son did the installation, then we called the city for the inspector to come out.
This is why I am writing this review.  With the total remodel, we had a lot of city inspections, and we knew how particular they are.  The inspector came out, went up on the roof for 10 or 15 minutes.  Then he told Andre he wanted to talk to us.  We thought...this can't be good.  On the contrary....the inspector wanted us to know what an outstanding job they did.  In fact, he said he had never seen such a perfect job.  He had been to two other homes for solar installation inspection prior to ours, and neither one of them passed.  He said they were done by well known, large local companies.  He said the larger companies sub-contract out the work, so you don't get the pride of ownership kind of work that we got.
Andre has five different licenses on his business card.  I did check his CA license....#958114...and he is in good standing with the state of California.  One of the other licenses was his federal contracting license, and another one was with the State of California as a disabled vet.
If you are looking for any kind of solar panel installation, PLEASE call Andre for a bid.  I really don't think you can find a better price, and I know you won't get a better job.
"
Recommended by100%of homeowners
Avatar for Better Earth Construction
Better Earth Construction
5.0(
3
)
Home Energy Audit

Serving Angwin, CA and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"The project was top notch. Not only did they consistently show up on time, but they finished the project early and were willing to reschedule the final walkthrough multiple times to accommodate our schedule. Final project turned out great!"
Response time2 hrs
Response rate91%
Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

The number one culprit of high energy bills is older appliances, especially fridges and freezers that are left on all the time. These two appliances tend to last a long time, which is good, but it also means that newer models are usually significantly more energy-efficient due to upgraded technology. The second most common reason for a high bill is heating and air conditioning.

While some aspects of an appraisal, such as comparable properties nearby, are out of your control, there are several steps you can take to potentially increase your home's value. Make any necessary repairs and upgrades before the appraiser's visit, as they can only value what is currently part of the home, not its potential. Examples include renovating older areas, updating landscaping to boost curb appeal, and staging your home. You can also provide the appraiser with the cost of recent upgrades, which may increase your home's value by about 50% or more of what you paid for those improvements.

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.

Leaving vents open but closing doors in unused rooms will probably not save money on your energy bill. Closed doors prevent the natural flow of air throughout the home, which could reduce the efficiency of the overall HVAC system. They could also restrict airflow into and through the return vents, making the HVAC system less efficient.

Wood windows fall in the middle of the window frame materials when it comes to energy efficiency. They’re more insulating than aluminum and vinyl, but they aren’t as efficient as fiberglass or composite frames. If you love the look and lifespan of wood windows and want to maximize efficiency, you can upgrade to double-pane or triple-pane glass and consider window tinting and low-emissivity (low-E) coatings to minimize heat transfer.

The Angwin, CA homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.