Skip to content
LokalMatch

Energy Audits

Energy Audits near you

A home energy assessment is sold under many names, and the names conceal a genuine difference in what you are buying. At one end sits a rating carried out by an accredited assessor using a government-supported tool, which produces a star rating and a report that other people recognise. At the other sits a free assessment offered by a business that would very much like to sell you what the assessment recommends. Both are called an energy audit.

Tell us about your energy audit project and we’ll help you find local energy auditors who serve your area.

Free for homeowners · No obligation to hire

On this page

It is also worth separating two things that get blurred. An assessment is a model: someone records the building, its orientation, its glazing, its insulation and its fixed appliances, feeds that into a tool and the tool predicts how the house will perform. A measurement is a test on the building as it stands, such as a thermal image of a wall or an airtightness test. A model tells you what should be happening; a measurement tells you what is. A good assessor uses both and is clear about which is which.

For an Australian household the practical value of an assessment is usually the ranking, not the rating. A report that lists what to do in what order, with the reasoning attached, is worth more than a number, because almost every house has one or two changes that dominate the rest and a long tail of measures that do not justify the disruption. Ask for the order and the reasoning before you ask for the score.

The kinds of energy assessment offered in Australia

  • A formal star rating of an existing home by an accredited assessor using a government-supported tool, which produces a certificate other parties recognise.
  • A design-stage rating for a new house or a major renovation, which is part of demonstrating compliance with the energy efficiency provisions of the building code and is done from plans.
  • An advisory home energy assessment, which is an inspection and a prioritised report with no certificate attached.
  • A subsidised or discounted assessment offered under a state energy programme, where the assessor works within the rules of that programme.
  • A supplier assessment, offered free or cheaply by a business that installs insulation, solar, glazing or heating, which is a sales visit with a report attached.
  • Specific diagnostic services such as thermal imaging or airtightness testing, which measure one property of the building rather than modelling the whole of it.
  • A self-assessment using published government guidance and a checklist, which costs nothing and is a reasonable starting point for many households.

What a thorough assessment of an Australian house covers

  • Orientation and shading, because in this climate which way the glass faces and what shades it in summer matters more than almost anything else.
  • The roof and ceiling, including what insulation is present, its condition and whether it is continuous, and what colour and type the roof is.
  • Walls and their construction, since brick veneer, double brick, weatherboard and lightweight cladding behave quite differently.
  • Glazing: how much there is, which way it faces, what type it is, whether it seals, and what covers it inside and out.
  • The floor, whether it is a slab on ground or suspended over a ventilated subfloor, which changes what is worth doing entirely.
  • Draughts and the condition of seals, along with the openings that must be left alone.
  • Fixed appliances: heating, cooling, hot water and how each is controlled, because these are where the running cost sits.
  • How the household actually lives in the house, which rooms are used when, and what temperatures people are aiming for.

Accreditation, independence and what to ask before booking

Where a rating certificate is being produced, the assessor has to be accredited to produce it, and accreditation is something you can ask about and verify rather than infer from a logo. Ask which scheme they are currently accredited under, what the report will actually be, and whether it is a certificate that another party such as a lender, a buyer or a programme administrator will accept, or an advisory document. The schemes that govern home energy rating in Australia have changed over time, so ask what is current rather than relying on a name you remember.

Independence is the other question, and it is the one that most affects the advice. An assessor who does not sell installations has no reason to rank one measure above another except its merit. An assessment offered free by an installer is not worthless, but the recommendations will tend towards what that business installs, and it is reasonable to say so out loud and to weigh the report accordingly. If you take a free assessment, treat it as one input rather than as the plan.

Finally, ask what happens after the report. An assessment that ends with a document and no conversation is half a service. The useful version explains what the biggest item is, why the second item is second, what each measure will and will not change about how the house feels, and what can reasonably be deferred. That conversation is where most of the value sits.

A model, a measurement and a thermal image are three different things

A rating tool models the house. It is excellent at comparing options before you spend money, at showing what a change to the glazing or the ceiling would do, and at producing a consistent number that can be compared between houses. It is not evidence about your particular wall, because it assumes the construction was built and is performing as described.

A measurement tests the building as it is. An airtightness test tells you how much air the house actually exchanges, which no model can know. Surface and air temperature readings tell you where the house is actually losing heat. These are the tools for answering why a house that should perform well does not.

Thermal imaging sits between the two and is frequently oversold. It shows surface temperature differences, which is genuinely useful for finding missing insulation, a wet patch or a draught path, but it requires a temperature difference across the element to show anything at all, so an image taken on a mild day in the middle of the afternoon can look reassuringly uniform and mean nothing. Ask under what conditions the imaging will be done, and treat a report of coloured pictures with no interpretation as decoration.

Assessments that do not help

  • A report that gives a score and no ranked list of actions, which tells you where you stand and not what to do.
  • Recommendations with no order and no reasoning, so a household spends first on the item that is easiest to sell rather than the one that matters most.
  • An assessment done entirely from plans or from the kerb, without anyone looking in the roof space or under the floor.
  • Thermal images taken in conditions where no temperature difference existed, presented as evidence.
  • A report that ignores how the household actually uses the house, and recommends measures for rooms nobody occupies.
  • Advice that treats sealing and ventilation separately, or that ignores a flued gas appliance entirely.
  • A recommendation to install something before the obvious and much cheaper measures have been dealt with.

State programmes, and why there is no national answer

Australia is a federation and household energy programmes largely sit with the states and territories. Victoria, New South Wales and the other jurisdictions each run their own schemes under their own legislation, with their own eligible activities, their own rules about who may deliver the work and their own paperwork. They are not interchangeable, they change from year to year, and there is no national household entitlement that applies everywhere.

That has two practical consequences. First, check your own state or territory energy department's current programme rather than relying on something a neighbour interstate told you, and confirm whether an assessment is a prerequisite for anything. Second, ask whether the business quoting you is registered to deliver work under that scheme, because in most schemes only registered providers can create the entitlement, and a quote from someone outside the scheme is simply a retail quote.

It is also worth asking whether the price you are being shown is a programme price or a retail one, since the two can differ substantially for identical work. Get that stated in writing before you accept, along with what paperwork you will receive and who lodges it.

What an assessment involves, and how LokalMatch fits in

The variables are whether a formal certificate is produced, how long the assessor spends on site, whether roof and subfloor spaces are actually inspected, whether any measurement such as thermal imaging or airtightness testing is included, and whether the engagement includes a conversation about the results rather than just a document. A subsidised assessment under a state programme is a different transaction again, with its own eligibility.

LokalMatch is where the job starts, not where it ends. Describe the house, its age and construction, what heating and cooling it has, which rooms are uncomfortable and your postcode, and energy assessment, insulation and building businesses covering your area contact you directly; those businesses pay LokalMatch for the requests they receive. LokalMatch does not do the work, does not set or quote prices and does not vet, rank or recommend anyone, so ask what accreditation the assessor holds, whether they sell installations, and whether the output is a certificate or advice.

Energy Audits: frequently asked questions

Is a home energy assessment worth paying for?

It is if the report gives you a ranked plan with reasoning rather than just a score, and if the assessor has actually looked in the roof space and under the floor. Most houses have one or two changes that dominate everything else, and knowing which those are before you spend is what the assessment buys. If all you want is a general sense of where to start, published government guidance and a careful walk through your own house will get you a long way for nothing.

What is the difference between a rating and an audit?

A rating is a modelled result produced by an accredited assessor with a recognised tool, and it produces a certificate that other parties accept. An audit or assessment can be anything from that to an advisory inspection with a written report. Ask specifically what document you will receive at the end, whether the assessor is accredited to produce it, and whether anyone other than you will recognise it.

Should I take a free energy assessment from an installer?

You can, but read it for what it is. A business that installs insulation, solar, glazing or heating has a reasonable incentive to recommend the thing it installs, and the ranking in the report will tend to reflect that. Treat it as one input, ask why each measure is ranked where it is, and consider a second opinion from an assessor with nothing to sell before committing to significant work.

Is thermal imaging a reliable test?

It is useful in the right conditions and meaningless in the wrong ones. It shows surface temperature differences, so it can only reveal something when a real temperature difference exists across the element being imaged. An image taken on a mild day can look perfectly uniform and prove nothing. Ask when and under what conditions the imaging will be done, and expect written interpretation rather than a folder of coloured pictures.

Do I need an assessment before I can get a state rebate?

Sometimes, and it depends entirely on which state you are in and which programme you are using, because each state and territory runs its own schemes with its own rules. Check your own state or territory energy department's current programme rather than assuming what applies elsewhere applies to you, and ask whether the business quoting the work is registered to deliver it under that scheme.

What does an assessor look at in an Australian house that matters most?

Orientation and shading usually top the list, because in this climate the direction the glass faces and what protects it from summer sun has an outsized effect. After that, the ceiling and its insulation, the glazing itself, the floor construction and whether there is a ventilated subfloor, and the draughts. Fixed appliances and their controls come next because that is where running cost accumulates. A report that does not discuss orientation and shading has skipped the most Australian part of the question.

Written by the LokalMatch editorial team. Last reviewed 22 September 2026. How we write and check our guides

What affects the cost of energy audit

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Area to insulate: attic, walls, basement or crawl space
  • Type of insulation
  • Removal of old insulation
  • Air sealing work
  • Access to the space
  • Ventilation changes

How to compare energy auditors before you hire

  • Choose a contractor who talks about air sealing and ventilation, not only adding more insulation.
  • Ask them to check the attic or walls for moisture, mould, old wiring or insulation that may contain asbestos before starting.
  • Get a written quote that states the type of insulation, the areas covered and the target insulation level.
  • For spray foam, ask about their training, curing time and when it's safe to be back in the home.
  • Consider an energy audit before and after the work to see where heat is being lost.

Questions to ask energy auditors before you hire

  • What type of insulation do you recommend for this area, and why?
  • Will you seal air leaks before insulating?
  • How will you keep the attic properly ventilated?
  • What will you do if you find old insulation that may contain asbestos, mould or old wiring?
  • For spray foam, how long do we need to stay out of the house?
  • Does this work need a permit or an inspection?

When to call a pro for energy audit

  • Rooms that stay cold or drafty, or ice dams forming on the roof
  • Frost or condensation in the attic in winter
  • Loose, pebble-like insulation in the attic: leave it undisturbed and have it assessed by a qualified professional.

Energy audit permits and local rules

Some energy audit work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

Seasonal maintenance

This job is part of our home maintenance checklists for:

Ready to get energy audit quotes?

Tell us about your energy audit project.

Do you offer energy audit services?

Join LokalMatch to get matched with homeowners in the areas you serve.