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

Avatar for G3 Services
G3 Services
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, CO and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

Welcome to [G3 Inspection Services, your trusted partner for professional home and business inspections. Whether you are purchasing a new home, selling a property, managing a commercial building, or simply want to understand the condition of your investment, our goal is simple: to provide you with clear, honest, and detailed information you can rely on.

2 neighbors recently requested a quote
Avatar for Voltaire Engineering
Voltaire Engineering
4.7(
58
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, CO and surrounding areas

In business since 2007

Free estimates

Credit card accepted

"My husband and I agree: Working with Voltaire Engineering was completely satisfying from beginning to end! All successful experiences start at the top, and this one was no exception. After we purchased a special deal through Angie's List, Director of Operations Dan Rosenbaum contacted us promptly and set up an appointment to visit our home. We instantly liked him; he is witty, smart and easy to talk to and just instinctively inspires confidence. He helped us to see past the obvious solutions to our various needs, and in each case we were glad we followed his advice. His electrician and painters were fabulous, too. They listened carefully to our needs and completed all tasks with true professionalism. In short, we were thrilled with every aspect of the project, including pricing. True to his company name, Dan is an enlightened professional whose problem solving approach to providing services is impressive. We loved having him and his team in our home. In fact, we have just compiled a list of additional projects and are hopeful that we can hire him again!"
Recommended by96%of homeowners
Avatar for Voltaire Solar and Electric
Voltaire Solar and Electric
4.6(
15
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, CO and surrounding areas

In business since 2005

Free estimates

"i was very impressed with the professionalism of the assessment and the comprehensiveness of the report. As followup they came and discussed the report and explained any questions. I submitted the report to the Governors Energy Office (GEO) for partial reimbursement (rebate) and will personally address air infiltration and other problem areas noted in the report. I would highly recommend Voltaire for home energy audits."
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Thermo Camera
Cold Spot Detection
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+1

Recommended by100%of homeowners
Sunlight Solar Services
New to Angi
Home Energy Audit

Serving Williamsburg, CO and surrounding areas

In business since 2015

Free estimates

Credit card accepted

With years of experience serving the area, we are your solution for all your solar needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Check out our 5 star reviews from happy customers! Call us today so we can discuss your needs and make a plan that fits your budget. Satisfaction guaranteed!

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Energy Efficiency Auditing FAQs, answered by experts

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.

Yes, including optimizing settings and suggesting upgrades if needed.

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

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 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 Williamsburg, CO homeowners’ guide to energy efficiency auditing services

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