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Top-Rated Energy efficiency auditors in Mountain View - Updated Nov 2026

Avatar for REenergizeCO, Inc.
REenergizeCO, Inc.
4.4(
151
)
Home Energy Audit

Serving Mountain View, CO and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"Scheduling an appointment for my home energy audit was easy. They had plenty of available times within the next week so that was great. They arrived on time and got right to work. I would hire them again."
 Insulation vs effective R-value
Existing attic insulation from 1970's Denver Home
 Attic blown to R49 with loose fill fiberglass
Thermal imaging picture of open interior wall
Picture from the attic looking at the open wall.

+2

Response time4 hrs
6 neighbors recently requested a quote
Recommended by96%of homeowners
Bestway Insulation, LLC
4.1(
286
)
Home Energy Audit

Serving Mountain View, CO and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

Home Pro of the Year in 2010 (Service Magic)Home Performance Contractor of the Year for the last 8 out of 10 years. We are a company that specializes in re-insulating existing homes by using blown-in insulation and getting huge reductions on our customers energy bills by Air Sealing and compressing fiberglass or rockwool in the walls and Dense packing it tight.Where most companies are happy getting 10%energy reductions on their clients homes, we want 50% or higher. Our family has owned and operated Bestway Insulation, LLC, in Colorado since 1976. Born & raised CO. Top Rebate producer for air sealing in 2009 - 2021. Home Performance with energy star Contractor of the year 21 out of 23 Years starting with NREL when they were doing it in 1996. I want huge results for my clients.

Response time1 day
18 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Liberty Home Inspections, LLC
Liberty Home Inspections, LLC
5.0(
1
)
Home Energy Audit

Serving Mountain View, CO and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

Response time40 mins
Recommended by100%of homeowners
Avatar for G3 Services
G3 Services
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Mountain View, 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 Energy Geeks, LLC
Energy Geeks, LLC
4.6(
28
)
Home Energy Audit

Serving Mountain View, CO and surrounding areas

In business since 2007

Free estimates

Warranties offered

"We had a great experience from start to finish. When I called they suggested a full energy audit which was an awesome suggestion. We found some additional things that could help our home and got some great information as well. Everyone was friendly and helpful throughout."
Air Sealing on Rim Joists
InsulWeb Dense Pack in progress
Insulweb Fiberglass Dense Pack
Energy Audit with Infrared Survey
Response time2 days
Recommended by95%of homeowners
Avatar for Simple Home Energy Solutions
Simple Home Energy Solutions
4.5(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Mountain View, CO and surrounding areas

In business since 2008

Free estimates

Credit card accepted

"I chose Simple Home Energy Solutions after getting several bids for doing spray foam in the attic. His experience was clearly superior to the other contractors. Robert identified several problems right away (missing insulation, mold in attic and squirrel nests) and was able to redo the insulation in the time frame I needed. He communicated with me throughout the process and made sure any problems we found were addressed. I would definitely work with him again for future insulation work."
Response time4 days
Recommended by96%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

HVAC systems use the most household electricity. This major and essential system is responsible for heating and cooling your home all year round. Since they operate for a significant amount during the day, it consumes more energy than other appliances. 

Some types of electric fireplaces use more electricity than others. Models that produce 1,500 watts will have more of an effect on your heating bill than 750-watt models. 

Electric fireplaces use an average of $1.85 of electricity every eight hours. These minimal operational costs aren’t likely to make a big difference in your electric bill—unless you’re using it as a primary heating source for your home and it’s running most of the time.

Modern windows provide enhanced UV protection, improved heat retention, and cooling efficiency, contributing to overall household energy savings.

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 Mountain View, 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.