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Verified Reviews for Energy Efficiency Auditing pros in Windsor, CO
*The Angi rating for Energy Efficiency Auditing companies in Windsor, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
*The HomeAdvisor rating for Energy Efficiency Auditing companies in Windsor, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
Last update on December 08, 2025
Find Energy efficiency auditors in Windsor

REenergizeCO, Inc.
REenergizeCO, Inc.
REenergizeCO is an approved contractor through Xcel Energy and Efficiency Works that specializes in home energy audits and insulation upgrades that improve the quality and efficiency of existing residential homes along the front range. Properly installed insulation in the attic, walls, crawl space, garage, basement, and air sealing are a few of the services offered. Reach out to schedule an energy audit or a free estimate with one of our BPI-certified technicians.
"The inspection went well. It's after the inspection that is terrible. Telling me that I need these things done to improve the then charging an astronomical amount of money. I was willing to do some of the work. Sent a list of what I would like done and got a new estimate, with virtually had the same as the first. Only change was to eliminate some insulation. I believe they try to put one over on people."
Todd S on December 2024
REenergizeCO is an approved contractor through Xcel Energy and Efficiency Works that specializes in home energy audits and insulation upgrades that improve the quality and efficiency of existing residential homes along the front range. Properly installed insulation in the attic, walls, crawl space, garage, basement, and air sealing are a few of the services offered. Reach out to schedule an energy audit or a free estimate with one of our BPI-certified technicians.
"The inspection went well. It's after the inspection that is terrible. Telling me that I need these things done to improve the then charging an astronomical amount of money. I was willing to do some of the work. Sent a list of what I would like done and got a new estimate, with virtually had the same as the first. Only change was to eliminate some insulation. I believe they try to put one over on people."
Todd S on December 2024
Energy Slayers
Energy Slayers
We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
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Teressa B on August 2023
We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
""
Teressa B on August 2023
Standard Renewable Energy
Standard Renewable Energy
Standard Renewable Energy, provides energy efficiency and renewable energy solutions that help customers lower energy bills, reduce their environmental impact and increase their energy independence.
"They were friendly, honest (so many other contractors outright lie to you), accurate with their bid, prompt with keeping the installation appointment and thorough from the initial contact to the completion of the job. Service rep followed up with an inspection after the job was complete. Only 2 things I could say were slightly annoying were the screws left on the garage floor (but I was expecting some anyway from a previous contractor's work) and the fact that the sales rep did not deliver the rebate forms until it was almost too late to claim the rebate."
Marie J on June 2010
Standard Renewable Energy, provides energy efficiency and renewable energy solutions that help customers lower energy bills, reduce their environmental impact and increase their energy independence.
"They were friendly, honest (so many other contractors outright lie to you), accurate with their bid, prompt with keeping the installation appointment and thorough from the initial contact to the completion of the job. Service rep followed up with an inspection after the job was complete. Only 2 things I could say were slightly annoying were the screws left on the garage floor (but I was expecting some anyway from a previous contractor's work) and the fact that the sales rep did not deliver the rebate forms until it was almost too late to claim the rebate."
Marie J on June 2010
Bestway Insulation, LLC
Bestway Insulation, LLC
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.
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.
Colorado Home Services
Colorado Home Services
CHS is a local, veteran-owned licensed electrical contractor that provides full residential electrical services with deep expertise in whole house fans, attic fans and ventilation, sun tunnels and skylights. We have been providing the most environmentally friendly, cost-effective and energy-efficient home cooling and daylighting solutions in Colorado since 2003. We pride ourselves on delivering an un-matched customer service experience. From pricing to install, our team is dedicated to earning your trust and finding the best home cooling and daylighting solutions for your home, no matter what! Offering industry-leading brands and a wide range of products suited for any home, we are Colorado's premier home electrical, cooling and daylighting provider.
"When it comes to home services, CHC sets the bar exceedingly high. They installed a whole house fan that dramatically reduced the amount I need to run my AC. They were on time, professional, and completed the install faster than expected (~3.5 hours). They cleaned up after and took some time to train me on the many ways I could use the fan to save energy and improve comfort in my home, some of which I wouldn't have thought of. In an industry where low expectations seems to be the norm, to say that CHC exceeds expectations is an understatement."
Tyler N on September 2022
CHS is a local, veteran-owned licensed electrical contractor that provides full residential electrical services with deep expertise in whole house fans, attic fans and ventilation, sun tunnels and skylights. We have been providing the most environmentally friendly, cost-effective and energy-efficient home cooling and daylighting solutions in Colorado since 2003. We pride ourselves on delivering an un-matched customer service experience. From pricing to install, our team is dedicated to earning your trust and finding the best home cooling and daylighting solutions for your home, no matter what! Offering industry-leading brands and a wide range of products suited for any home, we are Colorado's premier home electrical, cooling and daylighting provider.
"When it comes to home services, CHC sets the bar exceedingly high. They installed a whole house fan that dramatically reduced the amount I need to run my AC. They were on time, professional, and completed the install faster than expected (~3.5 hours). They cleaned up after and took some time to train me on the many ways I could use the fan to save energy and improve comfort in my home, some of which I wouldn't have thought of. In an industry where low expectations seems to be the norm, to say that CHC exceeds expectations is an understatement."
Tyler N on September 2022
Scott Home Inspection LLC
Scott Home Inspection LLC
Professional home inspection company serving the northern Colorado area including Larimer, Weld, Boulder, Adams, Broomfield, Jefferson and Denver counties. All inspections conducted according to American Society of Home Inspectors (ASHI) Standards-of-Practice & Code-of-Ethics. Certified Radon & Mold testing. On-line Scheduling of Inspections. On-site generation & printing of Inspection Report Summary. Internet access to Full Inspection Report. Why Scott Home Inspection? 15+ years experience in residential remodeling & electrical engineering project management. Candidate Member with ASHI - the most respected home inspection organization in North America. E&O Insurance Coverage + General Liability Insurance. Graduate ASHI Home Inspector Training Program. On-line, Real-Time Scheduling of Inspections. Web-based Inspection Report & Email Notification.
"Great service and attention to detail."
Jonny R on November 2019
Professional home inspection company serving the northern Colorado area including Larimer, Weld, Boulder, Adams, Broomfield, Jefferson and Denver counties. All inspections conducted according to American Society of Home Inspectors (ASHI) Standards-of-Practice & Code-of-Ethics. Certified Radon & Mold testing. On-line Scheduling of Inspections. On-site generation & printing of Inspection Report Summary. Internet access to Full Inspection Report. Why Scott Home Inspection? 15+ years experience in residential remodeling & electrical engineering project management. Candidate Member with ASHI - the most respected home inspection organization in North America. E&O Insurance Coverage + General Liability Insurance. Graduate ASHI Home Inspector Training Program. On-line, Real-Time Scheduling of Inspections. Web-based Inspection Report & Email Notification.
"Great service and attention to detail."
Jonny R on November 2019

Key Heating & Air dba Oneguy Heating & Cooling
Key Heating & Air dba Oneguy Heating & Cooling
Your Heating & Air Conditioning Service Expert for over 20 years! As much as half of the energy used in your home goes to heating and cooling system. Making educated decisions about your home’s heating, ventilating, and air conditioning (HVAC) system can have a big effect on your utility bills — and your comfort. If your heating or air conditioning system is more than 10 years old, consider having them evaluated by the HVAC expert of Oneguy . We are an army of 4. I am a small company offering a higher quality installation of high efficiency equipment and system design in new custom homes or fixing all the trax homes that will not heat or cool with an Arzel wholehouse zoning system. A perfect solution for your basement finish project that will fix all your problems on the upper floors. Oneguy does not use sub-contractors unless it is a lic. plumber, electrician, to do any work out of my field to complete the job. I am lic. in Denver and most all metro cities and carry 2 million liability insurance. As an American Standard Dealer, I can provide you with the best furnaces and air conditioning units on the market as listed by consumer reports and consumer digest. You can look that up on thier web sites. Call Oneguy where quality takes priority 720-560-7100
"Excellent. Very professional, Final cost came in under estimate, substantially below competitive bid and with equipment."
Phil and Donna S on September 2020
Your Heating & Air Conditioning Service Expert for over 20 years! As much as half of the energy used in your home goes to heating and cooling system. Making educated decisions about your home’s heating, ventilating, and air conditioning (HVAC) system can have a big effect on your utility bills — and your comfort. If your heating or air conditioning system is more than 10 years old, consider having them evaluated by the HVAC expert of Oneguy . We are an army of 4. I am a small company offering a higher quality installation of high efficiency equipment and system design in new custom homes or fixing all the trax homes that will not heat or cool with an Arzel wholehouse zoning system. A perfect solution for your basement finish project that will fix all your problems on the upper floors. Oneguy does not use sub-contractors unless it is a lic. plumber, electrician, to do any work out of my field to complete the job. I am lic. in Denver and most all metro cities and carry 2 million liability insurance. As an American Standard Dealer, I can provide you with the best furnaces and air conditioning units on the market as listed by consumer reports and consumer digest. You can look that up on thier web sites. Call Oneguy where quality takes priority 720-560-7100
"Excellent. Very professional, Final cost came in under estimate, substantially below competitive bid and with equipment."
Phil and Donna S on September 2020

REenergizeCO Inc
REenergizeCO Inc
We are a Denver-based home energy auditing company that believes basic building science errors are handicapping our local energy grid. REenergizeCO is an approved contractor with both Xcel and Denver Energy challenge, and we help you fill out all of the required paperwork to get the rebates from these programs.
"I had a great experience with REenergizeCO. They installed new insulation in the attic and crawlspace of my townhome. What a difference! The crew was efficient, helpful, and friendly, and the estimate was completely thorough. Dexter was wonderful to work with."
Sherri L on August 2024
We are a Denver-based home energy auditing company that believes basic building science errors are handicapping our local energy grid. REenergizeCO is an approved contractor with both Xcel and Denver Energy challenge, and we help you fill out all of the required paperwork to get the rebates from these programs.
"I had a great experience with REenergizeCO. They installed new insulation in the attic and crawlspace of my townhome. What a difference! The crew was efficient, helpful, and friendly, and the estimate was completely thorough. Dexter was wonderful to work with."
Sherri L on August 2024

ROSS WINDOWS & DOORS
ROSS WINDOWS & DOORS
3 EMPLOYEES, NO SUBS USED. COST DETERMINED BY THE JOB. NO TRAVEL CHARGES.
"2 new sliding glass doors installed. Work was done quickly and with high quality. Great attention to detail, full cleanup and haul away, competitive pricing. Would definitely recommend!"
John N on April 2024
3 EMPLOYEES, NO SUBS USED. COST DETERMINED BY THE JOB. NO TRAVEL CHARGES.
"2 new sliding glass doors installed. Work was done quickly and with high quality. Great attention to detail, full cleanup and haul away, competitive pricing. Would definitely recommend!"
John N on April 2024
Northern Colorado Energy Solutions LLC.
Northern Colorado Energy Solutions LLC.
Fast, Efficient HVAC Installation and Service.
"I called over 7 companies for my Kohler home generator. Less than half replied and no final resolution. So, I contacted this company even though they are 8 hours from my home and weren't available to come, and not only did they reply, they took about 45 minutes to walk me through my entire system remotely and then refused payment! They spent their time and expertise just to help me out of the goodness of their hearts! You don't find companies like this in 2023 anymore - I'd pay twice the going rate just to have the level of service this company provides, very strongly recommend!!"
Jeff V on May 2023
Fast, Efficient HVAC Installation and Service.
"I called over 7 companies for my Kohler home generator. Less than half replied and no final resolution. So, I contacted this company even though they are 8 hours from my home and weren't available to come, and not only did they reply, they took about 45 minutes to walk me through my entire system remotely and then refused payment! They spent their time and expertise just to help me out of the goodness of their hearts! You don't find companies like this in 2023 anymore - I'd pay twice the going rate just to have the level of service this company provides, very strongly recommend!!"
Jeff V on May 2023
The Windsor, 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.
•Discover the average home energy audit cost, what impacts pricing, and how to save money on your audit. Get transparent, expert-backed cost info for homeowners.

A home energy audit is a detailed write-up of how to lower your utility bills and increase your comfort level. Find out if they’re worth the cost.
•Get a detailed breakdown of thermal imaging home inspection costs, including average prices, cost factors, and tips to help homeowners budget.

Home energy audits can identify ways to make your home more energy-efficient. Learn whether an energy audit is a good investment for your home.
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