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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 American Electrician
American Electrician
4.3(
30
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, CO and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"It went very well. I would highly recommend this company. They were polite and professional, as well as, highly knowledgeable about their work. The lead electrician, even gave me his personal cell phone number so I could contact him if anything of concern happened while they were working and after hours. The job took two days with the weekend coming between them."
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Recommended by88%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

Installing weather stripping or upgrading to insulated panels can improve efficiency.

A good SEER rating for an HVAC system is typically between 15 and 20. However, minimum requirements vary by location; HVAC systems in northern states must have at least a 14 SEER rating, while those in southern states need a minimum of 15. For the highest possible efficiency, look for units with a SEER rating of 21 or higher. It's important to remember that a SEER rating represents the maximum efficiency a unit can achieve, not the level at which it will operate at all times.

Yes, with features like LED lighting and variable speed controls for efficiency.

To find a reputable home energy auditor, start by researching local companies that offer the service and check their reviews, methods, and certifications. The most reputable professionals are often Home Energy Professional (HEP)-certified by the Building Performance Institute (BPI). You can also consult the Department of Energy’s certified list of energy auditors or use a state licensing tool to review local guidelines and ensure you are hiring a certified professional for your area.

Replacing a window frame will improve your home’s energy efficiency if the old frame is cracked or damaged in a way that allows unconditioned air from the outside into your living space or if you upgrade to a more energy-efficient window frame material. Aluminum is the least energy-efficient window frame material, followed by vinyl and wood. Fiberglass and composite frames are the most energy-efficient.

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.