BASIX Certificate

Issuing authority

NSW Department of Planning, Housing and Infrastructure — accessed via NSW Planning Portal (planningportal.nsw.gov.au/basix)

Official source

How to apply

1. Create or log into an applicant account on the NSW Planning Portal at apps.planningportal.nsw.gov.au.
2. Open the BASIX tool and enter the project details: property address, development type (new dwelling, addition/alteration, pool/spa), floor areas, and climate zone.
3. Complete the water assessment: enter proposed rainwater tank size, recycled water connections, and fixture water ratings.
4. Complete the energy assessment: enter window specifications, insulation values, heating/cooling systems, hot water system type, and any solar PV.
5. Complete the thermal performance assessment: either enter NatHERS star rating (minimum 7 stars as of October 2023) or use the BASIX thermal tool.
6. Complete the materials/embodied emissions section (added October 2023): enter primary structural and cladding materials.
7. If all BASIX targets are met, pay the certificate fee ($50 for a single dwelling; $80 for the first two dwellings in a multi-dwelling development, plus $35 per additional dwelling) and generate the BASIX certificate.
8. Download the BASIX certificate PDF, which lists all sustainability commitments that must be built into the development.
9. Attach the BASIX certificate to the Development Application or Complying Development Certificate lodgement via the NSW Planning Portal — the DA cannot be accepted without it.

Related topics

Related forms

• Building Permit Application (Multi-state: VIC Form 1 / WA BA1 & BA2 / QLD Building Approval / NSW Development Application)VIC: Form 1 (Application for a Building Permit); NSW: DA form via NSW Planning Portal; QLD: No fixed form number — lodged with private certifier or council; WA: BA1 (certified) / BA2 (uncertified)
• Occupancy Permit / Occupation Certificate (Multi-state: VIC Form 15/16 / NSW OC / QLD Form 11)VIC: Form 15 (Application for Occupancy Permit) + Form 16 (Occupancy Permit); NSW: Occupation Certificate (no fixed form number — lodged via NSW Planning Portal); QLD: Form 11 (Certificate/Interim Certificate of Occupancy, replacing certificate of classification from October 2020)
• Owner-Builder Permit / Licence — QLD, WA, SA, ACT and NTQLD: Owner-Builder Permit Application Form (form-ob-permit-application.pdf); WA: Form 75 (Approval — Owner-builder, updated; old version invalid from 1 June 2026); SA: CBS Online Form (via cbs.sa.gov.au/online-forms); ACT: Application for Construction Occupation Licence — Individual Owner Builder (forms.act.gov.au form code 1166); NT: Owner Builder Application Form (bpb.nt.gov.au)
• Home Building Compensation Fund (HBCF) Certificate of Insurance — NSW / Domestic Building Insurance Certificate — VIC / Home Indemnity Insurance Certificate — WA / QBCC Home Warranty Insurance
• Annual Fire Safety Statement (AFSS) — NSW