2026 Australia-wide guide
Home Energy Assessment Australia — Cost, Process & Free Calculator
A home energy assessment scores your house from 0 to 10 stars under the national NatHERS scheme. Expect to pay $300–$600, get the certificate in 3–10 days, and unlock $200–$500/year in heating and cooling savings per star gained.
$300–$600
Typical assessment cost
3–10 days
From visit to certificate
0–10 stars
Official NatHERS rating
What a home energy assessment covers
An accredited domestic energy assessor reviews the thermal performance of your whole house — not just one appliance — and models how much energy it needs to stay comfortable year-round.
Insulation in ceiling, walls and floor (R-values)
Window glazing, frames and shading
Air-tightness and draught sources
Building orientation and zoning
Heating and cooling system sizing
Hot water system efficiency
Construction materials and thermal mass
Local climate zone modelling
The 4 steps of an Australian home energy assessment
- 1. Free online estimate — Use the house energy rating calculator to preview your likely star rating in 2 minutes. No assessor needed yet.
- 2. Get quotes — Compare accredited domestic energy assessors in your area. Most homeowners receive 2–3 quotes within 24 hours.
- 3. On-site visit — A 1–2 hour inspection: measurements, photos, insulation checks, glazing notes. Existing homes only.
- 4. Certificate & report — Within 3–10 days you receive an official NatHERS certificate registered on the national database, plus an improvements list ranked by savings.
Find an assessor by state
Try the free calculator first
See your likely NatHERS star rating in 2 minutes before paying for a full assessment. Used by 12,000+ Australian homeowners.