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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.

1 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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Blower Door
Thermo Camera
Cold Spot Detection
Unplug Phone Chargers

+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

Smart glass doesn’t use a lot of electricity, and you can expect a standard window to add between $1 and $2 per year to your electric bills. Smart glass is proof that energy-efficient windows work. Although your smart windows may consume a little energy to operate, they can save enough energy to offset the costs. If you’re concerned about the minimal bump to your electricity consumption, you can opt for smart tint, which doesn’t require electricity to work.

R-value measures an insulation material's thermal resistance, indicating its ability to resist heat transfer. A higher R-value signifies better insulation performance because the material is more effective at slowing heat flow. The R-value depends on the type, thickness, and density of the insulation material, such as fiberglass, foam, or cellulose. Each inch of insulation typically provides an R-value between 3 and 8. There is no single universal R-value; the optimal choice depends on your climate zone. Colder climates require a much higher R-value than warmer ones to maintain energy efficiency, keep the home warm in winter and cool in summer, and manage costs.

String lights require electricity, but not an excessive amount, especially when compared to other lighting fixtures. LED rope lights, for instance, consume around one watt per foot. Running six or seven light strings simultaneously should only cost you around $10 to $15 each month. You can save even more money by remembering to turn off your lights during daylight hours. 

Yes, skylights can affect a home’s energy efficiency, either positively or negatively. Properly installed, energy-efficient skylights with Low-E coatings, double glazing, and UV-blocking glass can help regulate indoor temperatures and reduce heating and cooling costs. However, poorly insulated or older skylights can contribute to heat loss in winter and excess heat gain in summer, lowering overall energy efficiency.

Electric bills tend to be lower in spring and fall because people use less electricity during these seasons. Milder temperatures allow for less use of heating and cooling, unlike during winter and summer, which usually bring more extreme temperatures.

The Williamsburg, CO homeowners’ guide to energy efficiency auditing services

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