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Verified Reviews for Energy Efficiency Auditing pros in Guilford, ME

*The Angi rating for Energy Efficiency Auditing companies in Guilford, ME 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 Guilford, ME 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 Guilford

Downeast Energy

4.49(
37
)

Downeast Energy

4.49(
37
)
Customers say: Super punctual
117 years of experience

Additional email - [email protected]. Additional DBA - Downeast Energy & Building Supply.

"Highly advise not to use them for any installation jobs. Sloppy work, incorrect with regulator placement and double billed after another experienced technician did the job. Even the experienced technician did a half assed job reconnecting an exhaust vent that he decided to remove to run the gas line which did not need to be removed. cannot get ahold of customer service to discuss or dispute the service bill which then has my oil and gas deliveries on hold. I prepaid for the gas delivery while under dispute and am being double billed. I may just find a more reliable local person as this big time company with small time feelis simply not working out."

Randall R on December 2025

Additional email - [email protected]. Additional DBA - Downeast Energy & Building Supply.

"Highly advise not to use them for any installation jobs. Sloppy work, incorrect with regulator placement and double billed after another experienced technician did the job. Even the experienced technician did a half assed job reconnecting an exhaust vent that he decided to remove to run the gas line which did not need to be removed. cannot get ahold of customer service to discuss or dispute the service bill which then has my oil and gas deliveries on hold. I prepaid for the gas delivery while under dispute and am being double billed. I may just find a more reliable local person as this big time company with small time feelis simply not working out."

Randall R on December 2025

Avatar for New England Spray Foam Insulation Co., LLC

New England Spray Foam Insulation Co., LLC

3.50(
6
)

New England Spray Foam Insulation Co., LLC

3.50(
6
)
Customers say: Super punctual
16 years of experience

New England Spray Foam is a registered Efficiency Maine Partner that services the entire state of Maine.

"It took two weeks and many calls & emails for Mark to respond to the problem of a leak in the system which caused damage to the ceilings & floor. When he called back we were told that his company didn't have the time to come out. He referred us to another company that does work for him. Two weeks later, someone came to look at the system, said they think they found the problem and told us if it leaked again to call back because we might need a new pump. Well, it leaked. We called. They didn't return the call. So, we called a local guy who was willing to come out that day. When my husband explained what we were told, he said there was no pump involved. And, he was right because with the information we got from the local guy, my husband was able to fix the problem in ten minutes. Very disappointed in the lack of and quality of service from New England Spray Foam."

Theresa L on August 2020

New England Spray Foam is a registered Efficiency Maine Partner that services the entire state of Maine.

"It took two weeks and many calls & emails for Mark to respond to the problem of a leak in the system which caused damage to the ceilings & floor. When he called back we were told that his company didn't have the time to come out. He referred us to another company that does work for him. Two weeks later, someone came to look at the system, said they think they found the problem and told us if it leaked again to call back because we might need a new pump. Well, it leaked. We called. They didn't return the call. So, we called a local guy who was willing to come out that day. When my husband explained what we were told, he said there was no pump involved. And, he was right because with the information we got from the local guy, my husband was able to fix the problem in ten minutes. Very disappointed in the lack of and quality of service from New England Spray Foam."

Theresa L on August 2020

TP Environmental Consulting LLC

5.00(
1
)

TP Environmental Consulting LLC

5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

REAL ESTATE HOME INSPECTIONS RESIDENTIAL - COMMERCIAL BUILDING INSPECTIONS ENVIRONMENTAL INSPECTIONS & TESTING MOLD, RADON, FORMALDEHYDE METH LAB EVALUATION and TESTING THIRD PARTY CODE ENFORCEMENT INSPECTORS Our inspectors hold engineering degrees and are certified by the State of Maine in Building Codes and hold numerous Professional Certifications

REAL ESTATE HOME INSPECTIONS RESIDENTIAL - COMMERCIAL BUILDING INSPECTIONS ENVIRONMENTAL INSPECTIONS & TESTING MOLD, RADON, FORMALDEHYDE METH LAB EVALUATION and TESTING THIRD PARTY CODE ENFORCEMENT INSPECTORS Our inspectors hold engineering degrees and are certified by the State of Maine in Building Codes and hold numerous Professional Certifications

Solar Wolf Energy

2.00(
2
)

Solar Wolf Energy

2.00(
2
)
10 years of experience

Solar Wolf is a full service solar company with a great reputation and an old world belief to our customers. To under-promise and over-deliver, period. We have 18 years experience in construction, remodeling, roofing, solar water heaters, solar pv systems, battery back-up systems and much more. See what Solar Wolf Energy can do for you!

Solar Wolf is a full service solar company with a great reputation and an old world belief to our customers. To under-promise and over-deliver, period. We have 18 years experience in construction, remodeling, roofing, solar water heaters, solar pv systems, battery back-up systems and much more. See what Solar Wolf Energy can do for you!

Sustainable Structures, Inc.

No reviews yet

Sustainable Structures, Inc.

No reviews yet
18 years of experience

Established in 2007 Sustainable Structures currently has 9 employees and enlists the services of a 6 sub contractors regularly. Residential energy efficiency is our business. We pride our selves in our customer satisfaction and our long term reduction of fossil fuel usage in our home State of Maine.

Established in 2007 Sustainable Structures currently has 9 employees and enlists the services of a 6 sub contractors regularly. Residential energy efficiency is our business. We pride our selves in our customer satisfaction and our long term reduction of fossil fuel usage in our home State of Maine.

Avatar for Energy Choice Center

Energy Choice Center

No reviews yet

Energy Choice Center

No reviews yet
16 years of experience

We provide free energy consulting services that pertain to discounted natural gas and electricity supply services through local utility companies.

We provide free energy consulting services that pertain to discounted natural gas and electricity supply services through local utility companies.

Avatar for USA Alarm Service, Inc

USA Alarm Service, Inc

No reviews yet

USA Alarm Service, Inc

No reviews yet
29 years of experience

USA Alarm is a national company that has more than two decades of experience and an award winning command center that protects more than 700,000 homes and businesses through the United States, 24 hours a day and 7 days a week. We have offices located throughout the US, with two main offices in Indianapolis, Indiana and Post Falls, Idaho.

USA Alarm is a national company that has more than two decades of experience and an award winning command center that protects more than 700,000 homes and businesses through the United States, 24 hours a day and 7 days a week. We have offices located throughout the US, with two main offices in Indianapolis, Indiana and Post Falls, Idaho.

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FAQs for energy efficiency auditing projects in Guilford, ME

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 Guilford, ME 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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