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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
20 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
Showing 1-10 of 38
Energy Efficiency Auditing FAQs, answered by experts

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.

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.

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.

Depending on the level of audit you choose, a home energy audit will at least include a walk-through of the home to determine visible inefficiencies, but may include testing and a highly detailed inspection and report laying out the home’s inefficiencies and providing recommendations to fix those issues. The audit may also include a review of utility bills and mechanical testing. Consult your home energy auditor about the types of services they provide before hiring.

STC (Sound Transmission Class) is a rating that describes how well a building material or assembly blocks airborne sound. A higher STC rating means less noise will pass through the material, providing better sound reduction. This rating system applies to various building components, including windows, doors, flooring, drywall, and insulation.

For context, a typical single-pane window has an STC rating of around 25 (where normal conversations are audible), while a well-sealed, double-pane window can exceed STC 45 (blocking loud speech and most music). It is important to note that for some products, like soundproofing drywall, the STC rating refers to the entire wall system, not just the individual panel.

Additionally, STC ratings are most effective for measuring sound reduction at mid-to-high frequencies, such as human speech, and may not accurately reflect how well a material blocks low-frequency sounds like bass music or thunder. Because of these factors, it is recommended to consult a professional to determine the right STC-rated materials for your specific soundproofing needs.

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.