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BASIX Alterations & Additions Assessments

Planning a renovation, extension or upper-floor addition in NSW?

 

If the work is valued at $50,000 or more (or includes a pool or spa over 40,000 litres), a BASIX certificate is required.

 

AENEC specialises in BASIX assessments for alterations and additions. We carefully evaluate the new and altered parts of your project — including walls, floors, ceilings, roofs, windows and services — to ensure compliance with current NSW energy, water and thermal comfort requirements.

 

What our BASIX Alterations & Additions service includes:

  • Assessment of all new and modified building elements

  • Thermal comfort modelling where required

  • Energy and water efficiency commitments tailored to the scope of works

  • Practical recommendations that help you meet targets without unnecessary cost

  • Clear documentation ready for council submission

  • Guidance on design improvements that protect your budget and design intent

Unlike a full new-dwelling assessment, we focus only on the changes being made, making the process efficient and relevant to your renovation or extension.

 

With more than 15 years of experience and a very high success rate on council submissions, AENEC helps architects, builders and homeowners achieve smooth, cost-effective BASIX compliance for alterations and additions.

 

Need a BASIX certificate for your renovation or extension?
Contact us today for a tailored fee proposal.

OTHER

OPTIONS

AENEC

SYDNEY

info@aenec.com.au

Mobile: 0416 316 204

Office:  02 9994 8906

Level 14, 309 Kent Street

Sydney 2000

Australia

AENEC

MELBOURNE

info@aenec.com.au

Mobile: 0416 316 204

Office: 02 9994 8906

Level 14, 330 Collins Street

Melbourne 3000

Australia

AENEC

COMPANY

AENEC has been servicing the Australian Building Industry since 2010. You can trust our abilities, judgement and experience.

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© 2026 Wide Spectrum Pty Ltd Trading as AENEC Australian Energy Efficiency Consulting / ACN: 32 612 556 377

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