BASIX Login: How to Access the NSW BASIX Portal
1 June 2026
If you’re trying to complete a BASIX Certificate for a new home, renovation, or multi‑dwelling project in NSW, the first step is accessing the BASIX login page. Whether you’re a builder, designer, architect, or homeowner, this guide walks you through everything you need to know, including how to log in, common issues, and what to do if you can’t access your account.
What Is BASIX?
BASIX (Building Sustainability Index) is a mandatory NSW government scheme that ensures new residential developments meet sustainability targets for:
- Energy
- Water
- Thermal comfort
Where to Find the Official BASIX Login Page
The official BASIX login page is located on the NSW Planning Portal.
Users can log in using:
- A Planning Portal account
- A Service NSW account
- A linked organisation account (for builders, architects, assessors)
Once logged in, you can:
- Start a new BASIX assessment
- Edit an existing BASIX project
- Pay for and download your BASIX Certificate
- Submit documentation for DA or CDC approval
How to Log Into BASIX (Step‑by‑Step)
1. Go to the BASIX Login Page
Search for “BASIX login” or navigate through the NSW Planning Portal.
2. Choose Your Login Method
You can sign in using:
- Service NSW
- Planning Portal credentials
- Organisation login (if applicable)
3. Access Your BASIX Dashboard
From here you can:
- Create a new BASIX project
- Upload plans
- Enter glazing, insulation, and appliance details
- Generate your BASIX Certificate
Common BASIX Login Problems (and How to Fix Them)
1. Forgotten Password
Use the “Forgot password” link on the login page.
You’ll receive a reset email within minutes.
2. Can’t Access an Existing Project
This usually happens when:
- The project belongs to another organisation
- The email address isn’t linked to the original account
- The project was created under a previous assessor
A BASIX assessor (like Assessify) can help recover or recreate the project.
3. BASIX Portal Not Loading
Try:
- Clearing your browser cache
- Switching to Chrome or Edge
- Logging in via Service NSW instead of the Planning Portal
Do You Need a BASIX Assessor?
While anyone can log into BASIX, completing a certificate correctly requires:
- Accurate thermal modelling
- Correct glazing calculations
- Insulation optimisation
- Energy and water modelling
- Compliance with NatHERS and NCC requirements
Mistakes can lead to:
- DA delays
- Rejected certificates
- Costly redesigns
- Over‑specification (paying for upgrades you don’t need)
A professional assessor ensures your BASIX Certificate is:
- Fast
- Accurate
- Cost‑optimised
- Fully compliant
Why Builders and Designers Prefer Assessify
Assessify provides:
- Fast BASIX turnaround
- Accurate NatHERS modelling
- Glazing and insulation optimisation
- Build‑friendly reports
- Support through DA and CDC approval
If you’re stuck at the BASIX login stage or need help completing your certificate, we can take over the entire process.
Final Thoughts
Searching for “BASIX login” is usually the first step in completing a BASIX Certificate — but logging in is the easy part. Ensuring your project meets all BASIX and NatHERS requirements is where most people need expert help.
Check out our BASIX page for information & pricing.
Written by Mark Zangari, BASIX Consultant @ Assessify
Mark Zangari is a building compliance and sustainability specialist at Assessify, with experience supporting residential development approvals across New South Wales.
They work closely with builders, designers, developers & home owners to navigate BASIX requirements, development applications and construction compliance.
With a focus on practical, regulation‑aligned guidance, Mark helps clients identify compliance risks early, avoid approval delays, and ensure sustainability commitments are met throughout the design and build process.