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TRUSTED BY LANCASTER, SC HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon14
    Verified energy efficiency auditing services reviews

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

Avatar for ADT Solar
ADT Solar
4.4(
111
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2008

Free estimates

Warranties offered

"We met with 3 different companies to advise on getting solar panels. The first 2 companies basically just told us what size system we could get based on state and federal tax rebate levels. Heard an advertisement for Sunpro on radio and decided to call them; turned out to be a good decision. Kara with Sunpro was extremely informative and had a nice package put together for us to review. She even researched our home and had an idea of how much production we could expect with the recommended solar panels. Even after selecting Sunpro, I called Kara with questions about things I'd heard from others or something I forgot to ask. I never felt like I was a burden and she always returned my calls if I had to leave a message. The complete team with Sunoro were professional and eager to help. Satisfied with new solar system and looking forward to enjoying savings on electric bills.
"
11 kW PV Installation
5 kW PV Installation
9.5 kW PV Installation
Recommended by89%of homeowners
Avatar for South Carolina Solar Project
South Carolina Solar Project
5.0(
9
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2017

Free estimates

"Jon Mason with South Carolina Solar Project did an amazing job start to finish. From the initial consultation and review of solar energy to the installation, topnotch professionalism. Jon's technical expertise, financial knowledge and passion for solar energy is evident and assured me that I was making the right choice to go Solar. I would, and have, highly recommend South Carolina Solar Project to anyone looking to go Solar!"
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+61

Recommended by100%of homeowners
Avatar for Fresh Air Technologies, LLC
Fresh Air Technologies, LLC
4.4(
239
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2001

Credit card accepted

"Outstanding! Mario and his workers did a fantastic job! They removed all insulation. They sanded off all wood and treated with a solution to kill any residual mold. They placed new insulation. They encapsulated the whole crawl space and placed a dehumidifier. I felt very confident that the job was "done right". The whole organization very professional."
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+4

Recommended by87%of homeowners
Avatar for Sound Advice
Sound Advice
4.5(
58
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"If you are looking for someone to install home theater--don't even bother looking anywhere else. Robert's prices were competitive, and he did an absolutely amazing job for us. He even worked overtime to make sure he was finished within the timeframe we agreed upon, and he made sure everything was working perfectly and took the time to walk us through everything. I cannot recommend him highly enough--super nice guy who is very skilled, knowledgable and works tirelessly to make sure you're happy. There's not much more you can ask for in a service provider.
"
Mounted TV
Fireplace
TV above an existing fireplace
Recommended by97%of homeowners
AltruEnergy Building Performance
5.0(
2
)
Home Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2006

Free estimates

"Chris Folse knows his stuff! He has been a big help teaching and showing us how to make our home more energy efficient. He speaks to you like a person and helps you truly understand your home's energy shortcomings. He is not just out to make a buck. He becomes honestly vested in making your home a more energy efficient place to live. You can tell from the moment you meet him that he is excited about, and strongly believes in, what he does and that translates into his work. I highly recommend his services to anyone interested in making their home more energy efficient."
Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Costs depend on pipe length, accessibility, and whether additional services are required.

Energy-efficient windows are judged on their performance according to a few different factors, including heat transfer, air leakage, light transference, and condensation resistance. If you're unsure whether a window is energy-efficient, look for an ENERGY STAR® label from the U.S. Environmental Protection Agency (EPA). If various products, including windows, meet energy-efficiency standards set by the federal government, the EPA issues this label to help consumers identify energy-efficient products.

No, it isn’t necessary to have energy-efficient windows. However, if you care about your energy bill and making your windows more energy efficient, fixing any heat, UV, or air transfer issues is an excellent way to lower your bills and keep your house cooler in the summer and warmer in the winter.

Yes, energy-efficient windows really can make a difference. As long as energy-efficient windows are properly installed and maintained, they can reduce your energy bill and offer significant savings.

Yes, Tesla Powerwalls are worth the upfront costs, as you can recoup your investment within six to eight years. Plus, they provide peace of mind that you'll have power during a power outage, and, depending on the system you install, you can become energy-independent. While they may be more expensive than other solar power systems, they offer higher battery capacity and lifespan.

The Lancaster, SC homeowners’ guide to energy efficiency auditing services

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