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Service · Audits

Home Energy Ratings for Existing Homes

A practical walk-through of your home with an accredited assessor — identifying the highest-value improvements to comfort, bills and emissions.

Partnership offer

10% off with Switch Your Thinking.

EcoForm has partnered with Switch Your Thinking to offer residents in participating council areas 10% off the RRP of a Home Energy Rating for an Existing Home. Quote the code below when you get in touch.

Promo code: SWITCHYOURTHINKING

Check if your council is eligible →

An accredited EcoForm assessor visits your home, performs an assessment, and gives you practical options ranked by cost, effort and impact to make the home more comfortable and cheaper to run.

On-siteDetailed on-site assessment, where a 3D model of your house is created

ReportPrioritised recommendations with indicative costs and payback.

Follow-upOptional review after implementation to verify performance.

in-home energy audits perth, western australia
Whole-of-home

Comfortable. Cheaper to run.

An accredited EcoForm assessor visits the home for a two-hour walk-through, looking at the fabric, services, appliances and how the home is used by its occupants.

You receive a certificate showing the home's star rating, where energy is being used, and a ranked set of practical options to improve it, from no-cost behavioural tweaks through to retrofit insulation and electrification.

01 What we look at

A whole-of-home diagnostic.

01 · Building fabric

Insulation, sealing & glazing

A nationally-recognised in-home rating, the first of its kind, assessing your home's ability to keep a comfortable temperature year-round.

02 · HVAC

Heating & cooling

A breakdown of where the energy used in your house actually goes: building fabric, heating & cooling, water heating, lighting or major appliances.

03 · Hot water

Hot water systems

Rates how the home performs in summer and winter, so you know which season is dragging the rating down.

04 · Lighting

Lighting & appliances

Ranked, costed options to lift the rating: from no-cost behavioural tweaks through to retrofit insulation and glazing.

05 · Solar

Solar PV & battery readiness

The certificate can be referenced when you sell or rent your house, as high-rated homes can attract a premium price and lower vacancy.

06 · Report

Prioritised action plan

For owners targeting a net-zero household, the audit maps the steps to get there. You'll know whether to tackle PV, electrification, or fabric upgrades, and the right order to do so.

02 How the audit works

A nationally-recognised tool. One visit. A clear plan.

An accredited EcoForm assessor visits your home and conduct a thorough on-site assessment. We use a nationally-recognised tool, the first of its kind for existing homes, that scores your home against measured comfort and energy performance, then translates that into practical options to improve it.

01

Book the visit

A 2-hour walk-through with an accredited assessor. We look at the fabric, services, appliances, and how you actually use the home.

02

Measure & model

We assess the home's ability to keep a comfortable temperature in summer and winter, and where the energy is being used across major systems.

03

Rate out of 10

The home receives a certificate showing its star rating out of 10. This evaluates where energy is used, and the efficiency of the house's major elements.

04

Prioritised options

Practical, ranked options to improve the home's energy efficiency, from no-cost behavioural tweaks through to retrofit insulation and electrification.

03 On the certificate

Five things you'll see, in plain English.

The certificate isn't a marketing document — it's a working tool. It tells you exactly where the home sits today, why, and where the easiest gains are.

Item 01

Star rating out of 10

The headline number — your home's overall performance against a nationally-recognised benchmark for comfort and energy use.

Item 02

Where your energy is used

A breakdown across the building fabric, heating & cooling, hot water, lighting and major appliances — so you can see where the bill is actually going.

Item 03

Performance of major elements

Rates the efficiency of the home's building fabric and major appliances individually — so you can target upgrades, not blanket them.

Item 04

Hot vs cold weather performance

How the home performs in summer and winter separately — tells you which season is dragging the rating down and what to fix first.

Item 05

Practical improvement options

Ranked, costed options to lift the rating — from behavioural changes through to retrofit and major upgrades.

Item 06

Zero-emissions pathway

For owners targeting net-zero, the certificate maps the order of operations — PV, electrification, fabric upgrades — in the right sequence.

04 Benefits beyond bills

The audit is useful now, and at sale.

If your home is too hot, too cold, or expensive to run, our assessors will discuss options for improving comfort and reducing bills. But the certificate keeps working long after we leave.

The In-Home Energy Audit can be referenced when you sell or rent the home. High-rated homes attract a premium and rent more easily. It also tells you exactly what to do, in what order, if you want to push the home further: lower emissions, lower bills, or all the way to net zero.

01
More comfortable home

Practical options to address why your home is too hot in summer or too cold in winter, backed by measured data, not guesswork.

02
Lower running costs

Targeted recommendations focused on the highest-payback improvements so you don't spend money fixing things that weren't the problem.

03
Useful when you sell or rent

The rating can be referenced in listings, high-rating homes tend to attract a premium and lower vacancy compared to non-rated comparables.

04
More resilient

High-rated homes are less demanding on the grid and more comfortable through heatwaves and cold snaps, a real benefit during outages.

05
Lower emissions

Higher-rated homes generate fewer greenhouse gas emissions in day-to-day operation.

06
A path to zero

For owners aiming for net-zero, the audit becomes the roadmap — PV, electrification, fabric upgrades and behaviour, in the right order.

06 Where we work

Existing-home ratings, wherever you are.

Our accredited assessors carry out in-home energy audits across WA.

Perth metro

Perth & Metro Suburbs

Coastal and hills homes across Perth's metro suburbs face very different summer heat-gain and winter-draught issues, we tailor the walk-through to your suburb's conditions.

Peel

Mandurah & Peel

Mandurah, Pinjarra and the wider Peel region are serviced directly, with fast turnaround on bookings.

Great Southern

South West, Mid West & Great Southern

Regional areas are serviced by our team, with the ability to travel to your home and complete the assessment, no matter if you're located in Geraldton, Margaret River or Albany.

07 FAQ

Common questions.

Is this the same as a NatHERS rating for a new home?

No. A NatHERS rating for a new home is based on building plans before construction. The In-Home Energy Audit rates a home that already exists, based on an on-site inspection of its actual fabric, services and appliances.

How long does the assessment take?

The on-site walk-through typically takes around two hours, depending on the size and complexity of the home. Your written report follows the visit.

Am I eligible for a discount through Switch Your Thinking?

If your home is within a participating Switch Your Thinking council area, you can quote the code SWITCHYOURTHINKING when you contact us to receive 10% off the RRP of your Home Energy Rating for an Existing Home. Check the Switch Your Thinking partner council area page to confirm your eligibility before booking.

Do I need this if I'm just renovating?

Renovations need a separate NCC energy efficiency assessment, which our NatHERS team handles. Many owners get the In-Home Energy Audit first so the renovation actually targets the weak points we identify.

Can I use the certificate when I sell or rent my home?

Yes. The certificate and star rating can be referenced in a sale or rental listing, and higher-rated homes tend to attract stronger buyer and tenant interest.

For your role

Who finds an audit most useful.

Homeowners use the audit when their home is uncomfortable, expensive to run, or about to be sold or rented. The rating, the certificate and the prioritised options are all in plain language — you don't need to be technical to act on them.

For builders, designers and developers, audits also serve as a measured baseline before adaptive re-use, retrofit or renovation work — grounding the strategy in real performance numbers rather than assumptions.

 Coordinated

Related services from EcoForm.

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Call(08) 9555 9444
Writeops@ecoform.com.au
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