Belco Group is a nationally accredited Thermal Performance Assessor producing 6 star energy ratings in the residential housing market. Having been cemented in the industry for over a decade, completing over 5,000 ratings in that time, Belco Group knows how to produce fast and cost efficient 6 star rating for its customers.

Getting a 6 star energy rating is easier than people think. To find out how easy it is to get an energy rating and a free quote by contacting us here.

Belco Group works very closely with a number of major volume builders and understands the importance of quick turnaround times and low cost.

We are very capable of completing reports for the volume housing industry and know our customers appreciate our dedication to providing a personalised service.


This short video helps explain the process of how a Nathers assessment is conducted and how it can help reduce the heating and cooling costs of your new home or renovation.


Feel confident knowing Belco Group is nationally accredited to complete your energy rating. This video shows the advantages of using an accredited Thermal Performance Assessor to complete your energy rating.


When it comes to choosing a home design or creating your own, there are a few fundamental rules that are essential for creating a home that's sustainable. Not only is it going to create better quality home living, it will reduce your energy bills and not to mention the reduction of your carbon footprint.

Orientation, Orientation, Orientation!

Just like real estate agents say location, location, location. As thermal performance assessors we say orientation, orientation, orientation. This being one of the most essential parts of choosing a home or designing your own. Always try to locate your living areas and kitchen to the north, with small aspects facing west and east. Always avoid essential living areas facing south as this will result in these areas becoming cold and dark.

Create Zones

Being able to close off areas in your home will keep your heating and cooling cost down. Positioning doors around living areas and bedrooms will seal off areas in your home that don't need to be heated and cooled and keep your main zones warmer and cooler. This also creates less pressure on your heating and cooling system.


Insulation does not just consist of the batts you put in your ceiling and walls, it is also made up of all your building materials. Generally most common building materials are reasonably good. The use of double glazed windows is great but can sometimes be unnecessary and even make your homes thermal performance worse. be sure to research on building materials and don't be afraid to change your materials from north to south. Always make sure your designer puts in R2.0 insulation in your walls and R4.0 insulation in your ceiling as a minimum.

Cross Flow Ventilation

Cross flow ventilation is very important when it comes to cooling a house after a hot day of sun. Opening windows on opposite sides of the house can move hot air out very quickly. The positioning of the windows to achieve cross flow ventilation is great when possible but not essential.

Seal it up

One of the most common ways a house will lose its cool in summer or warmth in winter is from air leaks. A lot of this happens from poorly sealed windows, unsealed exhaust fans and down light penetrations. Be sure to research when choosing your window manufacturer and find a good quality window that will keep sealed for a long time. Choose exhaust fans that are sealed and make sure to choose down lights that do not create huge amounts of heat such as halogen.

Don't be afraid of the Sun.

Do you remember growing up in a home with no insulation and in summer it was like living in an oven? Most people remember this and design their homes to keep the summer sun out. The sun can be loathed in summer but loved so much in winter. Think of ways that the sun can reach your home in winter. Eaves are great on the north facings but be sure they are not too big that they eliminate the winter sun. The summer sun sits high in the sky while the winter sun sits a lot lower. This is great to let the winter sun inside your home in the winter.


What is an energy rating?

An energy rating is a measurement on the efficiency of the house's thermal performance. Put simply, how the house reacts to the climate. Houses that are well designed using the appropriate materials should keep you warm in winter and cool in summer without the excessive use of heating and cooling. The star rating will indicate its performance.

How long does it take to get a rating?

The size of the home will depend on how long it takes to complete a 6 star report on the home. For smaller homes it could be a day or two. For larger homes it could take several days.

At what stage should I get an energy rating?

You should get an energy rating close to the completion of the House plans. Once they are 95% complete you simply send us the plans for us to assess. In most cases the homes will achieve 6 stars and a report can be published. Sometimes a few minor alterations will be required to achieve 6 stars. In this case you will be notified of the changes before a report is published.

Why do you need an energy rating?

The Victorian Building Authority requires a 6 star energy rating to be conducted on every new home, alteration and addition. The Assessment is to be conducted by a qualified Thermal Performance Assessor.

What info is required to get an energy rating?

To get a quote for and energy rating all that is required is a Site plan, Floor plan and Elevations. 
To get an official energy rating we will require:

  • Site Plan

  • Floor Plans

  • Elevations

  • Section

It's also important for your plans to show window sizes. If the manufacturer of the windows and doors is known then that will also help the star rating.

Do I require and energy rating for an extension or renovation?

If your extension or renovation requires a building permit then you will require a 6 star energy rating or "Deemed To Satisfy" report which we can also provide.