BASIX Certificate Cost Calculator
Estimate the cost of a BASIX certificate (NSW energy and water assessment) for your project. Choose the project type and whether you need an assessor.
Your basix certificate details
Your estimate sits within the typical range.
BASIX is a NSW requirement. The government lodgement fee is modest, most of the cost is the assessor's time and any thermal modelling your design needs to pass.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- Simple projects may be self-assessable for just the government fee.
- Give the assessor a complete, final plan, re-runs after design changes cost more.
How we estimate this
A BASIX certificate in NSW typically costs $60 to $1,500 in 2026. A simple self-assessed alteration is cheapest; a new home or multi-dwelling needing an assessor and NatHERS thermal modelling costs the most.
Pricing reviewed: October 2026.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding basix certificate costs in Australia
A BASIX certificate in NSW typically costs $60 to $1,500 in 2026. A simple self-assessed alteration is cheapest; a new home or multi-dwelling needing an assessor and NatHERS thermal modelling costs the most.
BASIX sets energy and water targets for NSW builds. The government lodgement fee is small, the real cost is the assessor's time and any thermal modelling required to pass.
Frequently asked questions
How much does a BASIX certificate cost in NSW?
Typically $60 to $1,500 in 2026. A simple self-assessment is cheapest; a new home needing an assessor and NatHERS modelling costs the most.
Do I need a BASIX certificate?
In NSW, most new dwellings and many renovations and additions require a BASIX certificate for energy and water before approval. Confirm with your certifier.
Are you a surveyor / property-dev consultant?
Everyone on this page is working out what basix certificate costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.