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Top-Rated Energy efficiency auditors in Islip - Updated Nov 2026

Avatar for Triple H Insulation
Triple H Insulation
4.6(
41
)
Home Energy Audit

Serving Islip, NY and surrounding areas

Approved

In business since 1999

Free estimates

Credit card accepted

"ABSOLUTELY RECOMMENDED ð ¯, WORKERS ARE RESPECTFUL, WORKED HARD ð ð , ADDED NEW & BETTER INSULATION IN THE ATTIC, ADDED INSULATION INTO THE GARAGE WALLS & CEILING, VERY PLEASED WITH THE WORKERS & JOB, WOULD HIRE TRIPLE H INSULATION AGAIN FOR THE FUTURE."
Spray Foam -Rim Joist
Cellulose Insulation
Cellulose Insulation
SilverGlo -Crawl Space
Cellulose Insulation

+152

Response time12 hrs
Response rate93%
6 neighbors recently requested a quote
Avatar for Home and Harbor Property Management
Home and Harbor Property Management
New to Angi
Home Energy Audit

Serving Islip, NY and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

Hello! My name is Doug and own and operate Home and Harbor Property Management and Concierge Service based in Madison CT. While our primary focus is full service property management and home-watch, no job is too big or too small. Anything from carpentry, masonry, mailbox install and repair, weather stripping install and repair, appliance maintenance, junk removal, dump runs, season outdoor clean up, deck repair and on and on. We havea network of local subs for large scale jobs and can handle all your needs. We are a trusted source for primary home owners, second home owners and commercial properties alike.

Avatar for Green Audit USA
Green Audit USA
4.4(
100
)
Energy Audit - For BusinessHome Energy Audit

Serving Islip, NY and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"Green Audit performed a home energy audit on my home. I originally purchased the deal they offered through Angie's List for $75, but was informed by Green Audit that the audit can be done for free provided by funding through PSEG so Green Audit refunded the $75 and there was no charge for the audit. Matt and Richard performed the audit. I thought they were very professional and provided a lot of useful information. After the completion of the audit they provided me with an estimate for recommended efficiency work and a ROI summary of what the work could save me in money over time. The estimate they provided was extensive and included a lot of items for energy efficiency, some of which you would not get from a typical insulation company, I thought their pricing was a bit on the high side and I decided not to use them."
Recommended by89%of homeowners
Avatar for Eco Green Solutions
Eco Green Solutions
5.0(
28
)
Energy Audit - For BusinessHome Energy Audit

Serving Islip, NY and surrounding areas

In business since 1987

Free estimates

Emergency services offered

"It went really well. They came in immediately and sealed off the basement from the rest of the house (There's no door to the basement)). They also set up very large and powerful hepa-air-cleaning units which they kept running through the whole job and in fact until the industrial hygienist returned for post-testing after the job was completed. The manager Mike assured me that the job would be done with the utmost effort and care and that's exactly what happened. The main workers, Marcello and Israel were terrific, meticulous, hard-working, reliable, responsive to any concerns I raised. I really couldn't have asked for any more. The post-test results showed Zero spores of the two bad molds with high readings in the pre-job testing. It's a really nice feeling when people come in and do the job just as they promised to."
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Recommended by100%of homeowners
Avatar for Powersmith Home Energy Solutions
Powersmith Home Energy Solutions
4.2(
27
)
Energy Audit - For BusinessHome Energy Audit

Serving Islip, NY and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Joe Ryan, the salesman, was very knowledgeable and helped us choose the best boiler and hot water heater for our home.  From our first meeting with him through the installation, he was always very accessible and set our expectations about next steps and timing.
The Powersmith crew (Sean, Bobby, and Brian) showed up when promised.  At all points during the two-day job, they were patient and happy to answer questions.  Further, they were happy to accommodate requests of mine regarding the cosmetic nature of the job that may have seemed trivial, but which were important to me.
Following completion of the job, Bubu (Assistant Project Manager) has been easy to reach and very helpful in scheduling the Town's final inspection and helping me file for the various available rebates.
As a green-energy company (BPI?), Powersmith had access to certain rebates that gave it a significant price advantage over most plumbers doing oil-to-gas conversions.
We are very happy with the job, and are happy to highly recommend Powersmith."
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+9

Recommended by80%of homeowners
Avatar for Federal Conservation Corp
Federal Conservation Corp
4.5(
166
)
Energy Audit - For BusinessHome Energy Audit

Serving Islip, NY and surrounding areas

In business since 1979

Free estimates

Credit card accepted

"Joe did a great job on this, our dining room was a add on to connect the original home and the garage and had no insulation and boy in the winter it was unusable as well as the kitchen basically (the best part of the house). Joe came and drilled small holes in the attic floor that they sealed up later to allow for blowing in the insulation. And they cleaned up well. we have a 20 month old but there was nothing left over for the baby to put in her mouth. Joe is great! Our dining room is toasty and the kids can play in there year-round Plus they are were less than half of the expensive "efficiency" guys PSEG sent over. Those providers wanted to charge $10,000+ for basically the same job."
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+1

Recommended by90%of homeowners
Avatar for JVR Plumbing and Heating
JVR Plumbing and Heating
5.0(
8
)
Energy Audit - For BusinessHome Energy Audit

Serving Islip, NY and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"The customer service and work done was great, they came quickly assessed what work needed to be done, gave me an estimate that was very close to final price and a reasonable price at that. I’ve had to call plumbers in the past and they’ve left my place a mess, but these guys cleaned up way more than I expected. I was in complete panic before calling and they were extremely helpful and made the process an ease. I would definitely call them again if I need the services."
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Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

Attic and whole-house fans improve a home's energy efficiency and comfort. They ventilate hot air from the attic, which reduces peak cooling loads, lowers reliance on air conditioning, and decreases indoor temperatures. This improved air circulation and expedited heat exit helps lower cooling costs, balance moisture levels, and enhance overall natural airflow, contributing to the efficient operation of other home equipment.

DIY is possible with basic tools. Professional audits provide comprehensive assessments and tailored recommendations.

Energy-efficient windows cost more than other window types, but they can help you save on your monthly energy bills, get you some breaks on your taxes, and even increase the value of your home. According to Michael S. Regan, Administrator of the U.S. Environmental Protection Agency, when people invest in green upgrades like energy-efficient windows, they save energy, money, and more.

While some aspects of an appraisal, such as comparable properties nearby, are out of your control, there are several steps you can take to potentially increase your home's value. Make any necessary repairs and upgrades before the appraiser's visit, as they can only value what is currently part of the home, not its potential. Examples include renovating older areas, updating landscaping to boost curb appeal, and staging your home. You can also provide the appraiser with the cost of recent upgrades, which may increase your home's value by about 50% or more of what you paid for those improvements.

The Islip, NY homeowners’ guide to energy efficiency auditing services

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