Speed matters when you’re working towards DA or CDC lodgement. Evergreen Energy Consultants focuses on fast, accurate turnaround so your program stays on track. BASIX is a NSW Government requirement for residential developments and forms part of the planning approval process.

Typical turnaround times

For most single dwellings and straightforward alterations, we deliver BASIX Certificates and NatHERS ratings in around three business days once we have the necessary information.

Complex designs, large dual occupancies and multi‑unit developments may take longer due to modelling scope and documentation volume, but we’ll confirm timelines upfront.

What affects timelines?

• Completeness of plans – clear floor plans, elevations, sections and site plan accelerate modelling.
• Window schedules – final or near‑final glazing specs prevent rework.
• Design complexity – features like large west‑facing glazing, raked ceilings or mixed construction types can require additional optimisation.
• Number of dwellings – each apartment or townhouse must be checked.
• Change requests – if you want to test multiple options, allow extra time.

How to speed things up

• Send complete drawings and available schedules in your first email.
• Flag DA deadlines for prioritisation (Sydney, Newcastle and Central Coast teams often work to tight council programs).
• Be open to targeted improvements (e.g., shading tweaks) if results are borderline – they’re often faster than major redraws.

Our process at a glance

1. Plans in – you email drawings and any specifications.
2. Assessment – we build the model and complete BASIX/NatHERS. (NatHERS ratings are completed under the Nationwide House Energy Rating Scheme, which uses accredited software and assessors.)
3. Review – we outline any simple adjustments if needed.
4. Issue – we finalise and send your certificate/report for lodgement.

Need a certificate this week?

Tell us your deadline – we’ll do our best to meet it and keep your DA or CDC on track. Start today
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Written by Evergreen Energy Consultants — accredited BASIX and NatHERS assessors providing residential energy assessments across NSW.