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Verified Reviews for Energy Efficiency Auditing pros in Sun Prairie, WI

*The Angi rating for Energy Efficiency Auditing companies in Sun Prairie, WI 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 Sun Prairie, WI 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 13, 2025

Find Energy efficiency auditors in Sun Prairie

Avatar for Warren Heating & Air Conditioning

Warren Heating & Air Conditioning

4.95(
75
)

Warren Heating & Air Conditioning

4.95(
75
)
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

. Award winning. In 1946 Warren Heating & Air Conditioning began providing residential and commercial customers with affordable comfort thanks to high quality heating and Air Conditioning systems from Bryant. For 65 years, Warren Heating & Air Conditioning has been the name that home owners and businesses in the Madison and Dane County area depend on for complete sales, service and installation of HVAC and indoor air quality products. We are honored to have over 12,000 customers in the Dane County area that have helped us grow to one of the top HVAC companies in the area.When you call Warren Heating & Air Conditioning, you can rely on our team of factory-trained technicians to be on the job quickly and to treat every customer with the respect they deserve. At Warren Heating & Air Conditioning, we repair all makes and models, provide 24-hour emergency service (no trip charge) and even offer the benefits of a full service sheet metal shop.

. Award winning. In 1946 Warren Heating & Air Conditioning began providing residential and commercial customers with affordable comfort thanks to high quality heating and Air Conditioning systems from Bryant. For 65 years, Warren Heating & Air Conditioning has been the name that home owners and businesses in the Madison and Dane County area depend on for complete sales, service and installation of HVAC and indoor air quality products. We are honored to have over 12,000 customers in the Dane County area that have helped us grow to one of the top HVAC companies in the area.When you call Warren Heating & Air Conditioning, you can rely on our team of factory-trained technicians to be on the job quickly and to treat every customer with the respect they deserve. At Warren Heating & Air Conditioning, we repair all makes and models, provide 24-hour emergency service (no trip charge) and even offer the benefits of a full service sheet metal shop.

HEARTWOOD CONSTRUCTION

5.00(
10
)

HEARTWOOD CONSTRUCTION

5.00(
10
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Heartwood Construction, LLC is an award winning residential remodeling/historic restoration company serving the Madison area since 2002. We are a small design/build company that relies on delighted customers for referrals. We are a member of NARI, the Better Business Bureau of Wisconsin with an A+ rating and are a Home Performance with Energy Star Partner. We pride ourselves on our personalized customer service, our green remodeling and each beautiful project we complete.

Heartwood Construction, LLC is an award winning residential remodeling/historic restoration company serving the Madison area since 2002. We are a small design/build company that relies on delighted customers for referrals. We are a member of NARI, the Better Business Bureau of Wisconsin with an A+ rating and are a Home Performance with Energy Star Partner. We pride ourselves on our personalized customer service, our green remodeling and each beautiful project we complete.

Avatar for Westring Construction LLC

Westring Construction LLC

4.68(
19
)

Westring Construction LLC

4.68(
19
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Providing Solutions to Unique and Complex Remodeling Challenges

"This is my review and opinion of construction defect cause by westring construction LLC at my house.Westring construction was constructed for new construction of a front porch and roof. The defect re-laid to the uneven rough surface of front porch being built. This effect resulted in a away roofline in uneven unsightly appearance which indicated an issue within an issue framing in project, the trustworthy was not done symmetrically or evenly, yet seeding and singles replace on the rough. Additionally, there was lack of flashing in a valleys form by the new rough being attached to the old rough and extend to be usage cocking material at the connection. After the bringing this issue to the attention to westring contruction multiple times. I finally met with the contractor who denied faulty workmanship and refuse to resolve the issues in a timely manner. This resulted in my hiring an atty. to try to resolve a required repairs and may cope financial loses. My initial trust in the contractor resolve disappointing, frustrating in expensive experience. in some, use quiet prior in signing a contract in be sure quality control measure are met through out the construction process."

Barbara H on April 2022

Providing Solutions to Unique and Complex Remodeling Challenges

"This is my review and opinion of construction defect cause by westring construction LLC at my house.Westring construction was constructed for new construction of a front porch and roof. The defect re-laid to the uneven rough surface of front porch being built. This effect resulted in a away roofline in uneven unsightly appearance which indicated an issue within an issue framing in project, the trustworthy was not done symmetrically or evenly, yet seeding and singles replace on the rough. Additionally, there was lack of flashing in a valleys form by the new rough being attached to the old rough and extend to be usage cocking material at the connection. After the bringing this issue to the attention to westring contruction multiple times. I finally met with the contractor who denied faulty workmanship and refuse to resolve the issues in a timely manner. This resulted in my hiring an atty. to try to resolve a required repairs and may cope financial loses. My initial trust in the contractor resolve disappointing, frustrating in expensive experience. in some, use quiet prior in signing a contract in be sure quality control measure are met through out the construction process."

Barbara H on April 2022

Avatar for Hill's Wiring Inc

Hill's Wiring Inc

5.00(
4
)

Hill's Wiring Inc

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Hill’s Wiring has been in the electrical contracting business for Over 100 years. Since 1916 we have been known for high-quality electrical work and conscientious project management.

Hill’s Wiring has been in the electrical contracting business for Over 100 years. Since 1916 we have been known for high-quality electrical work and conscientious project management.

Avatar for Energy House LLC

Energy House LLC

4.11(
19
)

Energy House LLC

4.11(
19
)
Customers say: Super punctual
21 years of experience

Focus on Energy Home Performance Trade Ally is honest and has a reliable team that provides high quality, timely service. We treat your family with respect and have been in the Weatherization field since 1984. Our staff have completed over 1,000 independent energy audits and have offices in Milwaukee and Madison. For your added convenience we offer early and late appointments.

"Very thorough & fixed areas of concern to our satisfaction. We no longer have ice dams which was our main reason for hiring them."

Andrea K on January 2018

Focus on Energy Home Performance Trade Ally is honest and has a reliable team that provides high quality, timely service. We treat your family with respect and have been in the Weatherization field since 1984. Our staff have completed over 1,000 independent energy audits and have offices in Milwaukee and Madison. For your added convenience we offer early and late appointments.

"Very thorough & fixed areas of concern to our satisfaction. We no longer have ice dams which was our main reason for hiring them."

Andrea K on January 2018

Five Lakes Home Energy Audits

5.00(
5
)

Five Lakes Home Energy Audits

5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

More to come

"Not only was Teresa professional and knowledgeable, informing me of the details of the tests and recommendations for what fixes can easily be done myself or with simple fixes. But gave detailed notes of affordable and recommended options for more involved fixes. Additionally, Teresa accommodated my disability well, and discovered two minor gas leaks, aiding me in calling the utility and getting immediate repairs. I'd highly recommend 5 lakes to anyone looking to improve their home energy use, or prevent airflow problems."

Joe F on March 2021

More to come

"Not only was Teresa professional and knowledgeable, informing me of the details of the tests and recommendations for what fixes can easily be done myself or with simple fixes. But gave detailed notes of affordable and recommended options for more involved fixes. Additionally, Teresa accommodated my disability well, and discovered two minor gas leaks, aiding me in calling the utility and getting immediate repairs. I'd highly recommend 5 lakes to anyone looking to improve their home energy use, or prevent airflow problems."

Joe F on March 2021

Duerst Insulation Technicians

4.29(
17
)

Duerst Insulation Technicians

4.29(
17
)
Customers say: Super punctual
24 years of experience

We are a full service high performance insulation company. We also perform home performance audits that include infiltration testing and infrared imaging.

"Lee's team of insulation specialists did a phenomenal job of spray foam insulating a very, very small crawl space in our home (as well as some boxsills). We have had several construction professionals in our home recently, as we are considering a major renovation to our house, and they have all commented on how well done the job is, and how amazed they are that insulation specialists were able to access such a small space. The team arrived on time, did their work quickly, and the administrative team was very communicative, personable, and kind. We'd highly recommend Duerst to others!"

Carrie S on January 2019

We are a full service high performance insulation company. We also perform home performance audits that include infiltration testing and infrared imaging.

"Lee's team of insulation specialists did a phenomenal job of spray foam insulating a very, very small crawl space in our home (as well as some boxsills). We have had several construction professionals in our home recently, as we are considering a major renovation to our house, and they have all commented on how well done the job is, and how amazed they are that insulation specialists were able to access such a small space. The team arrived on time, did their work quickly, and the administrative team was very communicative, personable, and kind. We'd highly recommend Duerst to others!"

Carrie S on January 2019

Avatar for Chads Design Build

Chads Design Build

4.42(
24
)

Chads Design Build

4.42(
24
)
Customers say: Quality work
33 years of experience

Chads Design Build (formerly Chad's Carpentry) is a full-service residential remodeling company, specializing in sustainable design and historic renovations. Established in 1992, Chads is committed to providing knowledgeable, well-trained professionals, who create durable, energy-efficient, and beautiful renovations, including additions, kitchens, bathrooms, basements, windows and doors. We partner with Home Performance with Energy Star to assure quality and to lower your energy bills. Building a better world! LIC#:680471

Chads Design Build (formerly Chad's Carpentry) is a full-service residential remodeling company, specializing in sustainable design and historic renovations. Established in 1992, Chads is committed to providing knowledgeable, well-trained professionals, who create durable, energy-efficient, and beautiful renovations, including additions, kitchens, bathrooms, basements, windows and doors. We partner with Home Performance with Energy Star to assure quality and to lower your energy bills. Building a better world! LIC#:680471

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FAQs for energy efficiency auditing projects in Sun Prairie, WI

An energy audit costs about $420 on average, ranging from $100 to $2,250, depending on the size of your home, property, location, and the tests the auditor needs to perform. Keep in mind that the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit covers up to $150 of home energy audit costs. Common energy audit tests include:

  • Blower door test: $350

  • Duct testing: $100

  • HERS test: $375

  • HERS certification: $200

  • Infrared imaging: $200

The difference between an energy auditor and a home inspector is primarily in the purpose of the inspection. The energy auditor conducts tests in your home to determine the energy efficiency levels in areas like windows, insulation, and doorways. The auditor then makes recommendations for ways to improve a home’s energy efficiency. 

A home inspector examines various structures of your home to determine that everything is up to code and gauge the condition of features like the roof, foundation, HVAC, and electrical. The home inspector reports on the overall home and makes repair recommendations.

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.

The three levels of home energy audits include:

  • Level 1: Review of your energy bills and home for signs of energy inefficiency and areas for improvement. The average cost range is $0.08 to $0.12 per square foot.

  • Level 2: A level 2 ASHRAE energy audit costs $0.12 and $0.35 per square foot. In-depth analysis of your energy usage and provides a report of cost-saving changes.

  • Level 3: Comprehensive analysis and detailed recommendations for ways to improve your home’s energy efficiency. A level 3 audit costs about $0.36 to $0.50 per square foot.

To find a reputable energy auditor, find a local company that offers energy audit services. Research the company’s reviews, methods, and certifications to find a reliable professional in your area. The most reputable energy audit companies are HEP-certified by the Building Performance Institute (BPI). Be sure to check our state licensing tool to review the local energy auditor guidelines to ensure you’re hiring a certified professional.

The Sun Prairie, WI homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.

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