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    Average homeowner rating
  • Verified reviews icon49
    Verified energy efficiency auditing services reviews

Find Energy efficiency auditors in Cottage Lake

Avatar for Seatown Electric Plumbing Heating & Air

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,338
)
Approved Pro

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,338
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
1930 local quotes requested

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"The employee called me a sandn*gger. Do not hire these ppl."

Matt R on October 2025

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"The employee called me a sandn*gger. Do not hire these ppl."

Matt R on October 2025


Avatar for Washington Energy Services

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro
Customers say: Super punctual
277 local quotes requested
68 years of experience

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025


Avatar for Evergreen Energy Services

Evergreen Energy Services

704 228th Avenue Northeast, Suite 734
4.93(
20
)
Approved Pro

Evergreen Energy Services

704 228th Avenue Northeast, Suite 734
4.93(
20
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 years of experience

With many years of experience serving the Washington's surrounding area, Evergreen Energy Service is your solution for all your Home energy needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction guaranteed!

"Kirk performed a thorough blower door test, walking me through every point that he later included in his report. With his report in hand, I have confidence in my understanding of the priority improvements that I can make to my sealing my home's envelope, which is precisely what I'd hired him for."

Garrett M on October 2023

With many years of experience serving the Washington's surrounding area, Evergreen Energy Service is your solution for all your Home energy needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction guaranteed!

"Kirk performed a thorough blower door test, walking me through every point that he later included in his report. With his report in hand, I have confidence in my understanding of the priority improvements that I can make to my sealing my home's envelope, which is precisely what I'd hired him for."

Garrett M on October 2023


Avatar for HomeRx

HomeRx

13939 SW Tualatin-Sherwood Rd
4.62(
74
)
Approved Pro

HomeRx

13939 SW Tualatin-Sherwood Rd
4.62(
74
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
131 local quotes requested

HomeRx is an affordable, family-owned, full-service insulation and energy audit company. We offer a wide range of weatherization services that will fit your needs and budget. We work with Energy Trust of Oregon, Clark Public Utilities, and other regional utility programs to help you take advantage of incentives that lower your costs. Whenever possible, we apply those incentives at the time of purchase and take ownership of the paperwork and waiting involved with reimbursements. Plus, we provide any documentation you need to claim additional state and federal tax credits that further offset the cost of the project. Our installation crews are skillfully qualified with multiple weatherization and safety certifications. Call today and schedule a free home assessment by one of our energy experts and receive an itemized bid focusing on lowering energy costs and improving overall home comfort. Affordable, Professional, Experienced, and Performance you can trust. Thank you for your interest.

"HomeRx’s sales rep, Bryant, came to assess the attic and crawl space in an older home I purchased. His kind, calm manner of explaining what I needed and how HomeRx would remediate it was reassuring. He told me HomeRx and Energy Trust of Oregon are in a partnership. When I learned I qualified for an ETO rebate, it was so much more generous than I’d expected! HomeRx’s expertise, along with their care, flowed from beginning to end. When I called/visited the office, I felt truly valued as a customer. Alma, Taylor, Samual, Jennifer, Kimberly, and Adan each explained what I needed to know from their unique area of expertise! If there was a glitch, it was fixed to their standards. When I met Jose, HomeRx president, I felt his leadership had a genuinely heartfelt foundation, whether it was in his care for me, his customer, or in his manner of relating with his HomeRx’s teams. I highly recommend HomeRx for any service they offer that meets your needs. You can’t go wrong. "

Gaylie C on July 2025

HomeRx is an affordable, family-owned, full-service insulation and energy audit company. We offer a wide range of weatherization services that will fit your needs and budget. We work with Energy Trust of Oregon, Clark Public Utilities, and other regional utility programs to help you take advantage of incentives that lower your costs. Whenever possible, we apply those incentives at the time of purchase and take ownership of the paperwork and waiting involved with reimbursements. Plus, we provide any documentation you need to claim additional state and federal tax credits that further offset the cost of the project. Our installation crews are skillfully qualified with multiple weatherization and safety certifications. Call today and schedule a free home assessment by one of our energy experts and receive an itemized bid focusing on lowering energy costs and improving overall home comfort. Affordable, Professional, Experienced, and Performance you can trust. Thank you for your interest.

"HomeRx’s sales rep, Bryant, came to assess the attic and crawl space in an older home I purchased. His kind, calm manner of explaining what I needed and how HomeRx would remediate it was reassuring. He told me HomeRx and Energy Trust of Oregon are in a partnership. When I learned I qualified for an ETO rebate, it was so much more generous than I’d expected! HomeRx’s expertise, along with their care, flowed from beginning to end. When I called/visited the office, I felt truly valued as a customer. Alma, Taylor, Samual, Jennifer, Kimberly, and Adan each explained what I needed to know from their unique area of expertise! If there was a glitch, it was fixed to their standards. When I met Jose, HomeRx president, I felt his leadership had a genuinely heartfelt foundation, whether it was in his care for me, his customer, or in his manner of relating with his HomeRx’s teams. I highly recommend HomeRx for any service they offer that meets your needs. You can’t go wrong. "

Gaylie C on July 2025


Avatar for Sound Comfort Heating and Air Conditioning

Sound Comfort Heating and Air Conditioning

3316 124th St SE
5.00(
10
)

Sound Comfort Heating and Air Conditioning

3316 124th St SE
5.00(
10
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At Sound Comfort Heating, we pride ourselves on delivering exceptional heating solutions with over a decade of experience under our belts. As a family-owned, locally operated business, we understand the importance of personalized service and community trust. Our expert team is dedicated to providing top-notch services, from fireplace maintenance to full HVAC system installations. We utilize state-of-the-art equipment and innovative techniques to ensure your home stays comfortable all year round. And with our 100% satisfaction guarantee, you can trust that we'll go above and beyond to meet your needs and exceed your expectations. Choose Sound Comfort Heating for reliable, efficient, and friendly service every time.

"Very well. Before selling me any parts or services they asked if I checked all the safeties. I had missed one reset and the furnace started working again. Definitely will call them first next time I have a heating problem."

David M on April 2025

At Sound Comfort Heating, we pride ourselves on delivering exceptional heating solutions with over a decade of experience under our belts. As a family-owned, locally operated business, we understand the importance of personalized service and community trust. Our expert team is dedicated to providing top-notch services, from fireplace maintenance to full HVAC system installations. We utilize state-of-the-art equipment and innovative techniques to ensure your home stays comfortable all year round. And with our 100% satisfaction guarantee, you can trust that we'll go above and beyond to meet your needs and exceed your expectations. Choose Sound Comfort Heating for reliable, efficient, and friendly service every time.

"Very well. Before selling me any parts or services they asked if I checked all the safeties. I had missed one reset and the furnace started working again. Definitely will call them first next time I have a heating problem."

David M on April 2025


Avatar for Cloud9 Heating & Air

Cloud9 Heating & Air

1002 Aurora Avenue North
5.00(
5
)

Cloud9 Heating & Air

1002 Aurora Avenue North
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are Puget Sound's top quality heating and cooling (HVAC) company. We bring attention to detail and professionalism to each and every job. At Cloud9, we strive to make every job as easy and seamless as possible for our customers. We offer installation services ranging from Heating, Air Conditioning, Ductless Heat Pumps and Water Heaters. We treat every home as if it were our own.

"We are very satisfied with the work that Mike and his team did. They were very professional, always on time, knowledgeable, and did a very clean job. They surveyed the site 2 times in great detail and completed the installation of our heat pump faster than expected."

Onur K on May 2023

We are Puget Sound's top quality heating and cooling (HVAC) company. We bring attention to detail and professionalism to each and every job. At Cloud9, we strive to make every job as easy and seamless as possible for our customers. We offer installation services ranging from Heating, Air Conditioning, Ductless Heat Pumps and Water Heaters. We treat every home as if it were our own.

"We are very satisfied with the work that Mike and his team did. They were very professional, always on time, knowledgeable, and did a very clean job. They surveyed the site 2 times in great detail and completed the installation of our heat pump faster than expected."

Onur K on May 2023


Avatar for RSS Solar

RSS Solar

Aurora Ave.
No reviews yet

RSS Solar

Aurora Ave.
No reviews yet
Free onsite estimate

We make solar simple-- We are dedicated to making solar energy affordable and accessible to everyone-- with ZERO upfront costs.* Your home can become its own tiny power station and generate plenty of reliable energy, all while reducing your electricity bill. Plus, it doesn't hurt that your greener lifestyle will help your state achieve its renewable energy goals.

We make solar simple-- We are dedicated to making solar energy affordable and accessible to everyone-- with ZERO upfront costs.* Your home can become its own tiny power station and generate plenty of reliable energy, all while reducing your electricity bill. Plus, it doesn't hurt that your greener lifestyle will help your state achieve its renewable energy goals.


Avatar for United Solar

United Solar

1010 SE Everett Mall Way
No reviews yet

United Solar

1010 SE Everett Mall Way
No reviews yet
3 years of experience

United Solar is the solar installation division within United Seattle and offers the services of home electrification in Western Washington. Please see our our list of services for what is included in our umbrella of offerings to electrify your home.

United Solar is the solar installation division within United Seattle and offers the services of home electrification in Western Washington. Please see our our list of services for what is included in our umbrella of offerings to electrify your home.


Avatar for DVAC Heating & Air

DVAC Heating & Air

4516 132nd Pl SE
3.67(
9
)

DVAC Heating & Air

4516 132nd Pl SE
3.67(
9
)
11 years of experience

Dvac Heating & Air LLC, we can offer the best services and prices. Establish business since 2014, we offer residential maintenance plans, install ductless heat pumps, furnaces, central air heat pumps, electrical services, panels, lights, outlets, hot tubs, and other. Give us a call for your HVAC and electrical needs today.

"Avoid working with DVAC at all costs. When I initially requested a quote for the installation, I specifically asked for a 3-ton high-efficiency heat pump. Unfortunately, the experience with DVAC has been nothing short of frustrating. They began by stating that extensive work needed to be done, charging for it all upfront. However, when it came time to install, they drastically lowered the quality of the equipment, gaslighted me, and lied about what was being provided. Hidden charges surfaced right after my existing system was removed. The issues I discovered included but not limited to: 1.The installed heat pump is only 2-ton heat pump instead of the required 3-ton heat pump stated in the estimate. 2.The furnace provided is of lower quality than what was agreed upon. 3.The ducts installed are too small for the system. 4.The electrical cable used may be undersized for 3-ton heat pump. 5. All works were unpermitted. Throughout the project, I repeatedly verified the permit status with DVAC, including on the installation day (8/15). They assured me everything was in order. However, on 8/20, I confirmed with the City of Kirkland that none of the work had been permitted—a clear violation of both city regulations and our contract. Given these serious issues, I requested a full refund and the removal of all unpermitted work. DVAC refused to comply with the contract and denied the refund. If there were a zero-star option, I wouldn't even give them a single star."

Wendy L on August 2024

Dvac Heating & Air LLC, we can offer the best services and prices. Establish business since 2014, we offer residential maintenance plans, install ductless heat pumps, furnaces, central air heat pumps, electrical services, panels, lights, outlets, hot tubs, and other. Give us a call for your HVAC and electrical needs today.

"Avoid working with DVAC at all costs. When I initially requested a quote for the installation, I specifically asked for a 3-ton high-efficiency heat pump. Unfortunately, the experience with DVAC has been nothing short of frustrating. They began by stating that extensive work needed to be done, charging for it all upfront. However, when it came time to install, they drastically lowered the quality of the equipment, gaslighted me, and lied about what was being provided. Hidden charges surfaced right after my existing system was removed. The issues I discovered included but not limited to: 1.The installed heat pump is only 2-ton heat pump instead of the required 3-ton heat pump stated in the estimate. 2.The furnace provided is of lower quality than what was agreed upon. 3.The ducts installed are too small for the system. 4.The electrical cable used may be undersized for 3-ton heat pump. 5. All works were unpermitted. Throughout the project, I repeatedly verified the permit status with DVAC, including on the installation day (8/15). They assured me everything was in order. However, on 8/20, I confirmed with the City of Kirkland that none of the work had been permitted—a clear violation of both city regulations and our contract. Given these serious issues, I requested a full refund and the removal of all unpermitted work. DVAC refused to comply with the contract and denied the refund. If there were a zero-star option, I wouldn't even give them a single star."

Wendy L on August 2024


"The service provider was quick, professional, friendly, and did excellent work. I would recommend them and use them again in the future."

Donald B on August 2018

Service and installation of all residential heating and air conditions equipment. Including but not limited to furnaces, heat pumps, air conditioners, water heaters and tankless water heaters.

"The service provider was quick, professional, friendly, and did excellent work. I would recommend them and use them again in the future."

Donald B on August 2018

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Energy Efficiency Auditing questions, answered by experts

R-value is calculated by dividing the thickness of an insulation material by its thermal conductivity. The material's composition and density influence thermal conductivity. Materials with lower conductivity values provide better insulation. The higher the R-value, the better the material is at insulating, helping homeowners select insulation that meets the energy needs of their climate and home layout.

Setting your AC unit to 78 degrees can, indeed, help you save energy. In fact, according to experts, every degree you turn the unit up could save you between 1% and 3% on your energy bills. That said, turning your unit off entirely while you’re out might actually be less efficient than keeping it on at a higher temperature. Why? The unit will need to work extra hard to cool the house back off again after all those hot hours. 

Fireplaces can theoretically help you save on heating bills if you lower the temperature throughout the rest of your home and heat only a single room that you occupy using the fireplace. However, in most cases, homeowners won’t save any money on heating bills. Gas and electric fireplace inserts could actually lead to a spike in your respective energy bills if you use them frequently, and if you don’t keep up with chimney maintenance and repairs, your traditional masonry fireplace could actually be a source of heat loss in the winter.

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. 

Yes, including optimizing settings and suggesting upgrades if needed.

The Cottage Lake, WA homeowners’ guide to energy efficiency auditing services

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