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  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon11
    Verified energy efficiency auditing services reviews

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

Avatar for The Drying Company, LLC
The Drying Company, LLC
4.2(
157
)
Home Energy Audit

Serving Williamsburg, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"I am pleased with their service. They were punctual, they had an opening and moved my install date to earlier. They were even willing to adjust their installation hours around my schedule. I am pleased with this company and would hire them again. Looking forward to the savings on my energy bills."
Attic Before - Fiberglass Insulation
Water Damage and Open Vents
Before Crawl Space - Mold on Joists
Attic Air Sealing
Mold in Crawl Space

+132

Response time1 day
117 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Automatic Climate Heating & Air Conditioning
Automatic Climate Heating & Air Conditioning
4.8(
868
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 1983

Emergency services offered

Credit card accepted

"I had my SC evaporator unit freeze up right before the temps started reaching 100. I called that night, and they came out the next morning to investigate. ( had to wait for the unit to defrost before they could diagnose it) We discovered that it was low on Freon, which caused the freezing, but when we opened up the cover to the evaporator, it was completely rusted. The lack of airflow caused the unit to rust out. This was the original AC installed 24 years ago. They also discovered that the builder undersized all the duct-work. the size of the return, couldn't supply enough air to the system. (yes, i checked the math, and they were correct). They gave me several options on replacing the unit, and I went with the most efficient, highest SEER rating, since we're planning on staying in the house at least another 10 years. They replaced both the furnace, and the AC unit, and ran all new, larger duct-work, they arrived promptly at 8 AM, and the crew finished up around 6 PM. There was an issue with the mainboard controller (factory problem), and they followed up and replaced it. The whole crew was polite, friendly, and cleaned up after themselves. The new unit is much quieter, the airflow downstairs is dramatically better, and hopefully, I'l start to see those energy savings in my next Dominion Power bill :)"
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Alan Purser Sr
Olive Purser

+2

Recommended by94%of homeowners
Avatar for Renewable Engineered Systems
Renewable Engineered Systems
4.7(
12
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"Wonderful, it was a very quick and easy process. Brian talked us through it and in no time we had a 3KW system mounted on a frame in the garden and the invertor installed in the basement. Brian talked us through working with our power company to get the system checked and approved and we now get credits from the power company for power we provide to the grid. In addition we are set up to get Solar Renewable Energy Credits (SRECs) payments for providing clean energy. We also got a free Energy Audit which helped locate some problems areas we were able to fix. The system has basically cut our energy costs in half. I have hesitation in recommending them to anyone interested in solar energy."
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+14

Recommended by100%of homeowners
Avatar for CSI Home and Commercial Services
CSI Home and Commercial Services
4.6(
80
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 1995

Free estimates

Credit card accepted

Family owned & operated with over 35 years experience. Members of National Pest Management Assoc. & Virginia Pest Management Assoc. , Indoor Air Quality Association, and many others. Angies List discount applies. Company is forerunner in industry by using infrared technology to detect termites, moisture, mold etc.

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+5

Recommended by97%of homeowners
Avatar for Hybrid Air Heating & Air Conditioning, Inc.
Hybrid Air Heating & Air Conditioning, Inc.
4.2(
73
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"

 The Hybrid Air team are true professionals. They arrived on time (8:30 a.m.) to do the work. They put down drop clothes throughout the home. They removed my old furnace located in the attic of my three-level town home and installed a new, 80%, energy-efficient, two-stage system w/variable speed fan along with a new energy-efficient 16 SEER air conditioning unit. They were able to provide me with a great Trane system nearly $3000 less than other estimates for comparable systems and warranties. They also installed a new digital thermostat. They walked me through its operation. They completed all of the work in one day and left the home just about as clean as when they arrived. I received follow-up calls from the sales rep and the company CEO to ensure I was satisfied with the install. All in all a very positive experience. If you are in the market for a new HVAV system, definitely consider Hybrid Air.


"
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Home Advisor contractor of the year

+9

Recommended by79%of homeowners
Avatar for R&J Solar LLC
R&J Solar LLC
5.0(
2
)
Energy Audit - For BusinessHome Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 2022

Free estimates

Credit card accepted

We provide residential and commercial solar power options, and provide support services for industry partner companies. We offer no cost consultations and $0 down financing. Please contact our office for a consultation at (931)922-8258.

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+3

Recommended by100%of homeowners
Top Rope Inspection Services, LLC
New to Angi
Home Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 2014

Free estimates

In newer and older homes, the best way to ensure that you are well informed about the strengths and weaknesses of a property is with a Top Rope Inspection Services, LLC. Upon completion of the inspection, we will make sure you fully understand each and every item in the report and the importance of each item. Call us today for a fair, unbiased inspection.

Octopus Solutions
5.0(
1
)
Home Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 2020

Free estimates

Small jobs welcome

Octopus Solutions, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customer's interests, and make their concerns the basis of our business. \n

Response time1 day
Recommended by100%of homeowners
Avatar for Ace Handyman Window Division, Inc.
Ace Handyman Window Division, Inc.
1.9(
99
)
Home Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 1980

Free estimates

Warranties offered

Ace Handyman Window Division, Inc. is a locally owned company proudly serving Yorktown and the surrounding area. We offer multiple decades of industry experience. Call us today to discuss your next project. Ace is not the guy working out of his pick-up truck. We have been in business for 12 years. So if ever there is something else you need on your property you will be able to be a repeat customer as a lot of customers are. If ever there is an issue, with construction this is a possibility, we are a phone call away. We have knowledgeable Representatives that are educated on our products and our able to give suggestions on the best products for your home and give you an exact quote for your project. All of our contractors only work for us and have done our work for years. We may know we are not the cheapest nor the most expensive, we think of ourselves as a great value.

Roofing
Roofing
Roofing
Roofing
Standing seam metal roofs

+52

Response time1 day
Recommended by80%of homeowners
Johnson Investment, LLC
New to Angi
Home Energy Audit

Serving Williamsburg, VA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. \n \n \n \n \nWe are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details. We look forward to building a lasting relationship and guarantee your satisfaction! \n \n \n

Energy Efficiency Auditing FAQs, answered by experts

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

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.

There are several strategic ways to lower your home insurance premium. The primary one is to shop around and get quotes every few years to make sure you’re getting the best deal. Also, sometimes bundling your auto and homeowner’s insurance will get you a discount on both. Finally, try to keep your credit score up; many homeowner insurance companies use credit scores to generate quotes.

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

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 Williamsburg, VA homeowners’ guide to energy efficiency auditing services

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