Existing Residential Services

The energy efficiency and thermal performance of your development has a direct impact on both the occupants and the environment.

A property designed using ecologically sustainable development principles, promises an abundant life to its current and future residents.

In addition to contributing to the preservation of our planet, designing and building an eco-friendly home reduces the long-term costs of electricity, water and system maintenance.

Sustainable Residential Dwellings

Through eco-friendly improvements and sustainable building solutions, we’re preserving our ecosystem while achieving spaces of flawless functionality.

Residential Efficiency Scorecard

The Residential Efficiency Scorecard is a new ‘in home’ assessment, extending the Nationwide House Energy Rating Scheme (NatHERS), as part of a joint initiative of the Commonwealth, state, and territory governments.

The Residential Efficiency Scorecard provides existing homeowners across Australia an opportunity to discover and determine how energy efficient their home is and provides tailored recommendations for improvements.

Scorecard is a tool developed to help householders understand where their energy is being used within the house and how to make it more cost efficient.

Originally introduced as the Victorian Residential Efficiency Scorecard, the scheme has been implemented Australia wide providing each house with an individual rating on energy use, thermal performance, and overall efficiency. The scorecard is based on an ‘easy to understand’ star rating program that identifies how your home performs in both hot and cold weather.

The assessment takes into account the entire building shell and fabric including:

  • Floor Area – each room / zone (m2)
  • Ceiling Insulation
  • Window Size and Orientation
  • External Shading Devices
  • Overhangs / Eaves
  • Curtains / Indoor Blinds
  • Showers – Water Consumption (L/min)
  • Wall Material and Insulation
  • Floor Material and Insulation
  • Air Gaps / Air Leakage
  • Solar Absorptance Colour Selection (Light / Medium / Dark)


This report option is available for all States and Territories but is not currently a mandatory report.

Home buyers are commonly looking to add a Residential Efficiency Scorecard Rating to their building and pest inspection pre-purchase conditions, to ensure that their future home is a comfortable and cost-effective investment.

Why get a Scorecard Assessment?

More than just Bricks and Mortar

Your home may have efficient appliances, but still end up with a costly energy bill if the heat is coming in through an uninsulated ceiling or under doors. This is why the building shell (or building envelope) is so important.

The building shell consists of the roof, walls and floor of your home, as well as windows and insulation. The materials used to build your home all have different properties. Some allow heat to move through them easily, others help retain heat. How well your home is sealed is another factor that determines how much it costs to heat and cool and how comfortable the house is to live in.

Your Home’s Building Shell 

There are four parts to look at to improve the building shell. The improvement options on the certificate will highlight the weaker elements of your home.

  • Insulation, which acts to slow the rate of heat transfer through a material or building element, helping to keep the inside of your home warm in winter and cool in summer.
  • Thermal Mass, which affects the rate your home heats up and cools down. Materials like concrete and brick have high thermal mass and help to slow down the rate that a room may heat up or cool down.
  • Windows, which have the combined function of letting in light and allowing heat movement in summer and winter.
  • Air Leakage, which occurs through any gaps between the inside and outside of your home. These include deliberate openings like wall vents and chimneys, as well as gaps and cracks that develop over time.

Contact the team at Stellar Thermal for more information.