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    Verified energy efficiency auditing services reviews

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Avatar for Perma-Seal Basement Systems

Perma-Seal Basement Systems

4.43(
1,404
)
Approved Pro

Perma-Seal Basement Systems

4.43(
1,404
)
Approved Pro
Customers say: Super punctual
46 years of experience
Free onsite estimate

Perma-Seal specializes in protecting the value of your home backed by 45 years of serving the Chicagoland and NW Indiana areas. Our basement waterproofing stops leaks and flooding, our foundation repairs fix settling and bowed walls, and our crawl space solutions control humidity and improve air quality. Our concrete lifting and leveling service offers a reliable, quick, and highly effective way to repair your sunken, cracked driveway, patio, pool deck, or sidewalk for a fraction of the cost of replacement. Additionally, we provide yard drainage solutions, sewer and plumbing services, and home comfort solutions such as air sealing, and insulation to ensure your home remains in top condition. What sets us apart? Our commitment to superior customer service and our solid warranty. Any product or work covered by our warranty is serviced free of charge for the entire warranty period. Choose Perma-Seal for reliable, quality solutions to keep your home safe and comfortable.

"Jose and the team did a great job. Very professional and communicative. We're happy with the result and would recommend them."

ELAINE O on September 2025

Perma-Seal specializes in protecting the value of your home backed by 45 years of serving the Chicagoland and NW Indiana areas. Our basement waterproofing stops leaks and flooding, our foundation repairs fix settling and bowed walls, and our crawl space solutions control humidity and improve air quality. Our concrete lifting and leveling service offers a reliable, quick, and highly effective way to repair your sunken, cracked driveway, patio, pool deck, or sidewalk for a fraction of the cost of replacement. Additionally, we provide yard drainage solutions, sewer and plumbing services, and home comfort solutions such as air sealing, and insulation to ensure your home remains in top condition. What sets us apart? Our commitment to superior customer service and our solid warranty. Any product or work covered by our warranty is serviced free of charge for the entire warranty period. Choose Perma-Seal for reliable, quality solutions to keep your home safe and comfortable.

"Jose and the team did a great job. Very professional and communicative. We're happy with the result and would recommend them."

ELAINE O on September 2025


Avatar for Daniel Nagel

Daniel Nagel

4.90(
37
)
Approved Pro

Daniel Nagel

4.90(
37
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

Get the B.E.S.T for your home (Building Energy Services and Testing) from ZENERGY LLC. We strive to help our clients find the 'ZEN' in their homes, that point where there improved comfort and the utility bills aren't emptying your pocket. We take a whole house approach to identify and resolve any issues within the home's attic, basement, or crawl space to improve the homes performance against the weather. Our services focus on targeted air sealing, increasing the insulation, installing proper ventilation, or making adjustments to the home to improve the comfort. ZENERGY is your one stop for full home energy auditing or home performance improvements. Let us help solve your homes energy consumption and comfort issues with our 3D approach. We are able to Discover the root cause of the issue. Design a solution for repair and Deliver the corrective action to improve the situation. WWW.greenzenergy.com 773-710-1090

"We reached out to Dan with the issue of freezing pipes and cold rooms in our old house. Dan inspected the house and proposed a plan to remedy these issues. Aside from the more traditional air sealing and insulation solutions, Dan also recommended insulating the area of our house above our soffit, which was difficult to access but that appeared to be a major insulation issue. I should add the other firms we requested quotes for did not identify this area in their proposal. I firmly believe the proposals from the other firms would not have fixed our issues. Dan worked for ~2 weeks on air sealing our attic and house, adding insulation to our attic, removing our soffit and adding insulation and reinstalling soffit. Work was done well and within budget and at a fair price. Dan is very easy to work with and takes pride in his work. We are very happy to report our pipes have not frozen and the cold rooms are no longer cold - would highly recommend Dan to others - he went above and beyond."

Daniel C on January 2023

Get the B.E.S.T for your home (Building Energy Services and Testing) from ZENERGY LLC. We strive to help our clients find the 'ZEN' in their homes, that point where there improved comfort and the utility bills aren't emptying your pocket. We take a whole house approach to identify and resolve any issues within the home's attic, basement, or crawl space to improve the homes performance against the weather. Our services focus on targeted air sealing, increasing the insulation, installing proper ventilation, or making adjustments to the home to improve the comfort. ZENERGY is your one stop for full home energy auditing or home performance improvements. Let us help solve your homes energy consumption and comfort issues with our 3D approach. We are able to Discover the root cause of the issue. Design a solution for repair and Deliver the corrective action to improve the situation. WWW.greenzenergy.com 773-710-1090

"We reached out to Dan with the issue of freezing pipes and cold rooms in our old house. Dan inspected the house and proposed a plan to remedy these issues. Aside from the more traditional air sealing and insulation solutions, Dan also recommended insulating the area of our house above our soffit, which was difficult to access but that appeared to be a major insulation issue. I should add the other firms we requested quotes for did not identify this area in their proposal. I firmly believe the proposals from the other firms would not have fixed our issues. Dan worked for ~2 weeks on air sealing our attic and house, adding insulation to our attic, removing our soffit and adding insulation and reinstalling soffit. Work was done well and within budget and at a fair price. Dan is very easy to work with and takes pride in his work. We are very happy to report our pipes have not frozen and the cold rooms are no longer cold - would highly recommend Dan to others - he went above and beyond."

Daniel C on January 2023


"I've used Domicile Consulting for several homes, after initially finding the company on Angie's List. Dan Cullen is exceptionally knowledgeable, objective and insightful. Prices are reasonable and well worth the investment. Dan takes copious pictures and compiles them in a handy report with recommendations. Highly recommended."

Christopher C on January 2020

CALL or TEXT US at 312.488.1461. Additional contact Owner Mark Hughes at [email protected]; [email protected].

"I've used Domicile Consulting for several homes, after initially finding the company on Angie's List. Dan Cullen is exceptionally knowledgeable, objective and insightful. Prices are reasonable and well worth the investment. Dan takes copious pictures and compiles them in a handy report with recommendations. Highly recommended."

Christopher C on January 2020


Avatar for Hobson Plumbing & Heating Inc

Hobson Plumbing & Heating Inc

4.88(
169
)

Hobson Plumbing & Heating Inc

4.88(
169
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We are a family owned and operated residential and commercial plumbing, heating and cooling services company. We operate 24 hours a day. We have over 20 years of experience in the plumbing, heating and cooling industries and we guarantee the issue will be resolved quickly and efficiently the first time. Our licensed plumbers and HVAC techs accept all major credit cards, checks, and cash as payment when the job is complete .

"Very good, very professional. their price is competitive."

nancy p on June 2022

We are a family owned and operated residential and commercial plumbing, heating and cooling services company. We operate 24 hours a day. We have over 20 years of experience in the plumbing, heating and cooling industries and we guarantee the issue will be resolved quickly and efficiently the first time. Our licensed plumbers and HVAC techs accept all major credit cards, checks, and cash as payment when the job is complete .

"Very good, very professional. their price is competitive."

nancy p on June 2022


Avatar for Energy360 Solutions Inc

Energy360 Solutions Inc

4.98(
46
)

Energy360 Solutions Inc

4.98(
46
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are an energy-efficiency focused general contractor delivering Energy Audits, Insulation Services, Replacement Doors and Windows, and HVAC services. Our mission is to make your home or building perform as it was meant to, providing greater comfort for less money. Let the professionals at Energy360 Solutions find ways to lower your utility costs while increasing the overall comfort of your home or commercial building. The homes and buildings we occupy are more than a collection of unrelated parts. They are complex systems that require a holistic approach to discovering both the true dynamics of the problem and the full range of practical solutions. That’s the Energy360 Solutions advantage.

We are an energy-efficiency focused general contractor delivering Energy Audits, Insulation Services, Replacement Doors and Windows, and HVAC services. Our mission is to make your home or building perform as it was meant to, providing greater comfort for less money. Let the professionals at Energy360 Solutions find ways to lower your utility costs while increasing the overall comfort of your home or commercial building. The homes and buildings we occupy are more than a collection of unrelated parts. They are complex systems that require a holistic approach to discovering both the true dynamics of the problem and the full range of practical solutions. That’s the Energy360 Solutions advantage.


Avatar for DRF Water Heating Solutions

DRF Water Heating Solutions

4.63(
326
)

DRF Water Heating Solutions

4.63(
326
)
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers

Since 2004, DRF Water Heating Solutions has provided reliable and expert service for water heater and plumbing needs. We are Chicagoland's leading installer of all types of water heaters, and pride ourselves on offering same-day service and a hassle-free experience. Our team is fully licensed, ensuring you receive professional and dependable service every time. For a free no-obligation quote, call us and a trained Water Solutions Advisor will assist you. Or visit our website and complete a short survey to obtain an instant quote online. For a hassle-free experience, 1-year price guarantee and the best warranty, select DRF for your water heater and plumbing needs. IDPH plumbing license # 055-028138.

"Robert and Jorge did an excellent job removing my old laundry room sink and cabinet and installing the new one. I am very happy with the quality of their work and their attention to detail. Robert and Jorge were very knowledgeable and friendly and had a commitment to customer satisfaction. They were resourceful when faced with a potential plumbing issue and quickly resolved the problem."

Roland L on November 2025

Since 2004, DRF Water Heating Solutions has provided reliable and expert service for water heater and plumbing needs. We are Chicagoland's leading installer of all types of water heaters, and pride ourselves on offering same-day service and a hassle-free experience. Our team is fully licensed, ensuring you receive professional and dependable service every time. For a free no-obligation quote, call us and a trained Water Solutions Advisor will assist you. Or visit our website and complete a short survey to obtain an instant quote online. For a hassle-free experience, 1-year price guarantee and the best warranty, select DRF for your water heater and plumbing needs. IDPH plumbing license # 055-028138.

"Robert and Jorge did an excellent job removing my old laundry room sink and cabinet and installing the new one. I am very happy with the quality of their work and their attention to detail. Robert and Jorge were very knowledgeable and friendly and had a commitment to customer satisfaction. They were resourceful when faced with a potential plumbing issue and quickly resolved the problem."

Roland L on November 2025


"They recommended and performed services that did not correct our problem. Our bedrooms are still cold and when I called asking for them to come back out they never got back to me."

Angela P on March 2022

Attic Insulation & Ventilation: Attic Insulation, Attic Fans, Bathroom Exhaust Fans, QuietCool Pro Series Whole-house Fans, Roof Vents, Soffit Vents, Eave Vents, Baffles, Gap & Crack Fireblock Sealant.

"They recommended and performed services that did not correct our problem. Our bedrooms are still cold and when I called asking for them to come back out they never got back to me."

Angela P on March 2022


Avatar for SAFE Electrical Service

SAFE Electrical Service

4.89(
108
)

SAFE Electrical Service

4.89(
108
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

For over 20 years, we have provided all of Chicago and the surrounding areas with the highest quality electrical service. Our electricians are thoroughly trained to be in your home, they are courteous, will answer any question about your electrical situation, and will even wear shoe covers to help keep your home clean. All backed by our 100% Personal Satisfaction Guarantee. Our Master Electrician, Charles Otstott, has over 20 years’ experience as a residential and commercial electrician. He has a strong work ethic and is dedicated to safety. He also takes great pride in keeping the job as clean as he found it. He is a certified Generac Generator technician and an expert in trouble shooting power outages. We do not sub-contract our work, ever. You are the most important person from the time you call us- Guaranteed!!!

"I would hire SAFE Electric again and again and again! They are prompt, responsive, fair, efficient, courteous, respectful, etc. I have the highest recommendation for this company. Their customer service is top-notch and I'm grateful to have a company I can call when stuff just stops working or if I need to upgrade my lighting fixtures. I appreciate how they explain everything that needs to be done and what they did. You will not be disappointed. It wouldn't be hyperbole to say it will be the best home repair experience you will ever have."

MARGUERITE G on December 2024

For over 20 years, we have provided all of Chicago and the surrounding areas with the highest quality electrical service. Our electricians are thoroughly trained to be in your home, they are courteous, will answer any question about your electrical situation, and will even wear shoe covers to help keep your home clean. All backed by our 100% Personal Satisfaction Guarantee. Our Master Electrician, Charles Otstott, has over 20 years’ experience as a residential and commercial electrician. He has a strong work ethic and is dedicated to safety. He also takes great pride in keeping the job as clean as he found it. He is a certified Generac Generator technician and an expert in trouble shooting power outages. We do not sub-contract our work, ever. You are the most important person from the time you call us- Guaranteed!!!

"I would hire SAFE Electric again and again and again! They are prompt, responsive, fair, efficient, courteous, respectful, etc. I have the highest recommendation for this company. Their customer service is top-notch and I'm grateful to have a company I can call when stuff just stops working or if I need to upgrade my lighting fixtures. I appreciate how they explain everything that needs to be done and what they did. You will not be disappointed. It wouldn't be hyperbole to say it will be the best home repair experience you will ever have."

MARGUERITE G on December 2024


Avatar for Building Energy Experts Insulation and Supply

Building Energy Experts Insulation and Supply

4.62(
157
)

Building Energy Experts Insulation and Supply

4.62(
157
)
Customers say: Super punctual
18 years of experience

Building Energy Experts is the leading building energy auditor, energy retrofit, blow and spray foam insulation, led lighting, and alternative energy specialist for government, commercial, and residential applications since 2008. Building energy experts looks at your building as a complex system, we run a series of diagnostic tests to pinpoint exactly why your building isn’t as energy efficient, healthy, comfortable, and green as it should be. The results of our tests tell us exactly how to improve your building. BPI certified building scientists. Nicor/ Peoples Gas/ North Shore Gas/ ComEd Energy Smart Contractor.

"We just had our attic and crawl space insulated and a moisture barrier put in. The crew showed up on time and every one of them was polite and professional. We could tell they had a lot of experience working together because they were super organized. While the boss, Dave, walked us through the process in detail, making sure we understood the job, behind him the crew set up quickly and efficiently, treating our home with respect. They were finished right on time, too, and left our house looking as if they had never been there. Before they left, Dave showed us their work and explained how these improvements would make our home more energy efficient. Every crew member made sure to say goodbye to us. They were amazing people! We highly recommend Building Energy Experts."

Eve S on May 2024

Building Energy Experts is the leading building energy auditor, energy retrofit, blow and spray foam insulation, led lighting, and alternative energy specialist for government, commercial, and residential applications since 2008. Building energy experts looks at your building as a complex system, we run a series of diagnostic tests to pinpoint exactly why your building isn’t as energy efficient, healthy, comfortable, and green as it should be. The results of our tests tell us exactly how to improve your building. BPI certified building scientists. Nicor/ Peoples Gas/ North Shore Gas/ ComEd Energy Smart Contractor.

"We just had our attic and crawl space insulated and a moisture barrier put in. The crew showed up on time and every one of them was polite and professional. We could tell they had a lot of experience working together because they were super organized. While the boss, Dave, walked us through the process in detail, making sure we understood the job, behind him the crew set up quickly and efficiently, treating our home with respect. They were finished right on time, too, and left our house looking as if they had never been there. Before they left, Dave showed us their work and explained how these improvements would make our home more energy efficient. Every crew member made sure to say goodbye to us. They were amazing people! We highly recommend Building Energy Experts."

Eve S on May 2024


Avatar for Dowe and Wagner, Inc.

Dowe and Wagner, Inc.

4.82(
28
)

Dowe and Wagner, Inc.

4.82(
28
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

Heating, Ventilation & Air Conditioning Services for seventy eight years, Dowe and Wagner, Inc. have provided Southeastern Wisconsin’s & Northeastern Illinois’s residential and commercial HVAC customers with all season, in-door comfort. We maintain and repair all makes & models. Our Reputation When you ask our customers about us, we are confident you will be pleasantly surprised with their answers. We work hard to keep our customers happy. We provide referrals upon request. We have many sources at our disposal to obtain any part of your heating and cooling needs. We will stop at nothing to get proper parts to repair your system. Experience, We keep our servicemen up-to-date on the latest changes in the industry through regular schooling. Our technicians average 40 hours per year of industry training. This translates to less errors in diagnosing any needed repairs. Dependability, we go out of our way to insure that your heating and cooling problems are tracked down and repaired as soon as humanly possible. Reliability, We follow the strictest practice standards set by Bryant and have the position of Factory Authorized Dealer. Concern, No one enjoys an unexpected breakdown. We offer both preventative maintenance and full service agreements to insure that your equipment is operating at its peak efficiency. Energy Conservation We believe you should enjoy your system’s full efficiency at the lowest cost possible, so our sales staff is trained to choose the proper size of equipment for every job.

"We had a 20+ year old furnace that finally gave out on us. The technician, Ted, who replaced the furnace was very nice, respectful, and efficient. We had the new unit installed and running that same day! Very pleased and would highly recommend this company."

Nathaniel H on December 2023

Heating, Ventilation & Air Conditioning Services for seventy eight years, Dowe and Wagner, Inc. have provided Southeastern Wisconsin’s & Northeastern Illinois’s residential and commercial HVAC customers with all season, in-door comfort. We maintain and repair all makes & models. Our Reputation When you ask our customers about us, we are confident you will be pleasantly surprised with their answers. We work hard to keep our customers happy. We provide referrals upon request. We have many sources at our disposal to obtain any part of your heating and cooling needs. We will stop at nothing to get proper parts to repair your system. Experience, We keep our servicemen up-to-date on the latest changes in the industry through regular schooling. Our technicians average 40 hours per year of industry training. This translates to less errors in diagnosing any needed repairs. Dependability, we go out of our way to insure that your heating and cooling problems are tracked down and repaired as soon as humanly possible. Reliability, We follow the strictest practice standards set by Bryant and have the position of Factory Authorized Dealer. Concern, No one enjoys an unexpected breakdown. We offer both preventative maintenance and full service agreements to insure that your equipment is operating at its peak efficiency. Energy Conservation We believe you should enjoy your system’s full efficiency at the lowest cost possible, so our sales staff is trained to choose the proper size of equipment for every job.

"We had a 20+ year old furnace that finally gave out on us. The technician, Ted, who replaced the furnace was very nice, respectful, and efficient. We had the new unit installed and running that same day! Very pleased and would highly recommend this company."

Nathaniel H on December 2023

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Energy Efficiency Auditing questions, answered by experts

Audits include inspecting insulation, HVAC systems, windows, and appliances to identify energy inefficiencies.

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

Typically, triple-pane windows made with krypton gas filling are the most energy efficient. A window’s frame, glass, design, and installation all affect its energy efficiency. These windows, in particular, are designed highly effectively in terms of their ability to insulate.

The effect a gas fireplace has on your gas bill will depend on how often you use it, the size of the rooms you’re heating with it, and the BTUs of the fireplace itself, but generally speaking, it should only cost a few cents an hour to run it when it’s on. It will consume minimal energy when it’s “off” if you have a pilot light running constantly, but some modern gas fireplaces don’t require a constant pilot light.

Yes, pros suggest units with high EER ratings for energy savings.

The Union, IL 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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