Energy efficiency consulting · Australia-wide
Stars delivered where they count.
HERA-accredited NatHERS, BASIX and Section J assessments for Australian architects, builders and developers. Fast fixed-fee quotes, council-ready certificates, and plain-English advice that lifts star ratings without sabotaging the design.
§ Services
Four services. One accreditation. Everything compliant.
Residential ratings, commercial Section J, BASIX for NSW, and existing-home assessments for retrofits. Delivered by a HERA-member practice — meaning every certificate carries professional indemnity cover and current CPD.
NatHERS Assessments
Nationwide House Energy Rating Scheme ratings for new homes, renovations and extensions. 7-star thermal + Whole-of-Home scoring, delivered as a compliance-ready certificate.
BASIX Certificates
NSW Building Sustainability Index — energy, water and thermal comfort — signed and DA-ready. Written to the requirements of your local council, not a template.
Section J & JV3
NCC 2022 Part J energy efficiency for Class 2–9 buildings. Deemed-to-Satisfy reports and JV3 verification modelling when the design calls for it.
Existing Homes & Retrofit
Ratings for existing dwellings — useful for green home loans, informed retrofits, and point-of-sale disclosure. Newly possible under NatHERS' Existing Homes protocol.
Not sure which applies? Send your plans — we'll tell you what's needed for your specific project, state and council in the same email as the quote.
§ Vital statistics
Minimum star rating under NCC 2022
Fixed-fee quote turnaround
HERA-accredited assessments
AccuRate climate zones modelled
§ Process
From plans to certificate in four steps.
Same process whether it's a single residential rating or a 40-apartment Section J compliance package. No black-box modelling — we show you what's driving the rating and where the easy wins are.
— Envelope modelling against climate zone
— Envelope modelling against climate zone
Send plans
Drop your architectural drawings, site plan and spec. PDF or CAD — whatever you have. We prefer DWG + PDF but we’ll work with what you’ve got.
Quote within 24 hours
Fixed-fee quote back to you within one business day. No hourly billing, no surprises — what we quote is what you pay.
Thermal modelling
We model the envelope in NatHERS-accredited software, run scenarios against your climate zone, and flag low-cost changes that lift stars without killing the design.
Certificate delivered
You get a council-ready Certificate of Compliance + a plain-English summary your client can actually read. Revisions included if plans change.
§ Accreditation
A proud member of HERA.
The House Energy Raters Association is a government-recognised NatHERS Assessor Accrediting Organisation. HERA membership means every Corvus certificate is issued by a currently accredited assessor, carries professional indemnity insurance, and sits behind ongoing CPD tracked at the national level.
- HERA member — NatHERS Accredited Assessor
- Professional Indemnity Insurance underwritten for energy rating work
- Current CPD across AccuRate, FirstRate5 and HERO
- NCC 2022 Section J trained
§ Who we work with
Architects, builders, developers, and the odd brave homeowner.
Most of our work comes in through design practices and custom builders who need their thermal numbers sorted before DA lodgement. We also handle volume packages for project home companies and Section J work for commercial developers.
Next step
Send us your plans.
Fixed-fee quote back within one business day. If the rating needs work, we'll tell you exactly what'll lift it — before you commit.