Find the BASIX certificate and NatHERS star rating for any home
Enter a NSW address to see what the home's BASIX and NatHERS certificates say: the star rating, the heating and cooling loads, the insulation, the windows, solar panels, the rainwater tank and the fixtures, with every certificate on file. The full site report for the block follows: the aerial photo with contours and the boundary, which way it faces, zoning, flood, bushfire, slope and complying development.
We read the certificates from the documents councils publish with development applications. We keep only the facts in them, never the documents and never anyone's name, and an owner can ask us to take their address down.
NSW addresses only. Free, and no sign up.
Which councils does the lookup cover?
These councils so far, with the number of homes and certificates we have read in each. We are adding more.
| Council | Homes | Certificates |
|---|---|---|
| Central Coast Council | 2,240 | 3,011 |
| Port Macquarie-Hastings Council | 1,392 | 1,746 |
| Northern Beaches Council | 2,233 | 3,162 |
| The Hills Shire Council | 4,454 | 12,425 |
| Shoalhaven City Council | 1,191 | 2,116 |
Where can I read more about BASIX and NatHERS?
These guides answer the questions people ask most about a home's energy certificates.
What is a BASIX certificate?
A BASIX certificate shows that a new NSW home meets the state's targets for water use, energy use and thermal comfort. BASIX stands for Building Sustainability Index. Every new house needs one before it is approved, and so do alterations and additions costing $50,000 or more. The certificate lists what the builder must then build in: the insulation, the windows, the hot water system, the rainwater tank, the fixtures and any solar panels. Since 1 October 2023 it also reports a materials index, an estimate of the emissions embodied in the building materials.
What is a NatHERS star rating?
A NatHERS star rating scores a home from 0 to 10 stars on how much heating and cooling its design needs, and more stars means less. NatHERS, the Nationwide House Energy Rating Scheme, rates the shell of the house: the walls, roof, floor and windows, and which way they face. It does not rate the appliances. The NatHERS guide explains the scale.
How do I find the BASIX certificate for my house?
Search your address above: where the council published the certificate with the development application, we show what it says. Otherwise the copy is with whoever approved the house, the council for a development application or the certifier for a complying development certificate, and in the handover documents from the builder. The guide to finding a BASIX certificate covers each route.
Why can't you find my home?
Most often because we have not read its council yet, or because its certificate was never published. So far we have read Central Coast, Port Macquarie-Hastings, Northern Beaches, The Hills and Shoalhaven, and mostly recent approvals.
Homes approved as complying development, the faster approval a private certifier can issue, usually publish no documents at all. Homes approved before BASIX began have no certificate: it started in Sydney on 1 July 2004 and across the rest of NSW on 1 July 2005. A house on a new subdivision may also have been approved under its lot number before the street address existed, and some certificates are scanned images we cannot read yet.
Can I get my home's details removed?
Yes. Use the link that asks us to remove the details, under the home's record, and it opens an email to us. Once we record the request the home's page comes down within the hour, and it stays down if we read that council's documents again later.
What insulation is in my house?
For a house approved with BASIX, its certificates list the insulation it was approved with: the R value in the ceiling, the walls and sometimes the floor. Search your address above to read it. The insulation guide explains what the numbers mean and how to check the roof space yourself.
Is this information accurate?
It is what the council's copy of the certificate says, read by our software, so it is as accurate as that document and our reading of it. A certificate records the design that was approved, and a house can be built or later changed differently. We show only what the certificate states and leave a line out rather than guess. For anything you rely on, get the certificate itself from the council or the certifier.
For a block without a home on it yet, the Site Checker reads the same zoning, flood, bushfire and complying development maps, and the site slope calculator reads how steep it is.