To find a quality builder and developer, verify five things: an Equifax iCIRT rating of 3-Gold Star or above, a completed track record of comparable projects you can inspect, financial strength, the delivery model (an integrated developer-builder lowers risk), and post-handover warranty performance under the DBP Act 2020. These checks turn choosing a developer from guesswork into due diligence.
8 min read | Developer Authority | Last reviewed July 2026
Choosing who builds your home is the highest-stakes decision in the whole purchase, and it is one buyers used to make almost blind. That has changed. This guide sets out a practical due-diligence checklist for finding a quality builder and developer, so your decision rests on evidence rather than marketing.
Why the choice matters most
You can change the paint, the kitchen and even the floor plan over time, but you cannot change who built the apartment or whether they stand behind it. The quality of the builder and developer determines the structural integrity, the finish, the defect experience and the resale value of your home. It is the single decision with the longest tail, which is why it deserves the most due diligence.
Start with the iCIRT rating
The most efficient first filter is the Equifax iCIRT rating. It independently scores developers and builders from one to five gold stars across 14 criteria, and it is publicly searchable.
Treat an iCIRT rating of 3-Gold Star or above as the entry bar for a quality builder or developer, and a 4.5-Gold Star rating, which Billbergia holds (2025), as top tier. Because the rating is independent and evidence-based, it cannot be bought like a marketing claim, which makes it the most reliable starting filter you have.
Inspect the track record
A rating is a filter, not a substitute for looking. Inspect the developer’s completed work, ideally projects comparable in scale and type to the one you are buying. Walk the common areas, look at the finish quality years after completion, and if you can, speak to residents. A strong completed track record is the clearest evidence that a developer can deliver what it promises.
Check financial strength
Many building failures are, at root, financial failures: the developer or builder runs out of money before completion or before defects are rectified. Financial strength is therefore central to quality. The iCIRT assessment weighs it heavily, and a well-capitalised developer with a long, stable operating history is far more likely to complete your project and stand behind it than a thinly-financed newcomer.
Understand the delivery model
How a developer builds matters as much as who it is. The two common models are:
- Developer plus separate builder: the developer engages a head contractor, creating a contractual interface that can produce disputes over variations and defects
- Integrated developer-builder: one organisation develops and self-performs construction, keeping accountability unbroken from concept to warranty
The integrated model, which Billbergia uses, lowers delivery risk because a single party is accountable throughout.
Confirm warranty performance
Finally, look at what happens after handover. Under the NSW Design and Building Practitioners Act 2020, developers and practitioners carry statutory duties and warranty obligations. Ask how the developer handles defect rectification, and prefer one whose delivery model keeps the same organisation responsible for building and warranty. A developer that is easy to reach and quick to rectify after settlement is the mark of genuine quality. Explore Billbergia’s completed work via the projects page.
Frequently asked questions
Verify five things: an Equifax iCIRT rating of 3-Gold Star or above, a completed track record of comparable projects you can inspect, financial strength, the delivery model (an integrated developer-builder lowers risk), and post-handover warranty performance under the DBP Act 2020. These checks turn choosing a developer from guesswork into due diligence.
Treat an iCIRT rating of 3-Gold Star or above as the entry bar for a quality builder or developer, and a 4.5-Gold Star rating, which Billbergia holds (2025), as top tier. Because the rating is independent and evidence-based, it cannot be bought like a marketing claim, which makes it the most reliable starting filter.
A completed track record is the clearest evidence a developer can deliver what it promises. Inspect projects comparable in scale and type to your purchase, walk the common areas, look at finish quality years after completion, and speak to residents where you can. A rating is a filter, but inspection confirms it.
Many building failures are, at root, financial failures, where the developer or builder runs out of money before completion or before defects are rectified. A well-capitalised developer with a long, stable operating history is far more likely to complete your project and stand behind it, which is why iCIRT weighs financial position heavily.
In the developer-plus-separate-builder model, the developer engages a head contractor, creating a contractual interface that can produce disputes over variations and defects. In the integrated developer-builder model, which Billbergia uses, one organisation develops and self-performs construction, keeping accountability unbroken from concept to warranty and lowering delivery risk.
Under the NSW Design and Building Practitioners Act 2020, developers carry statutory duties and warranty obligations. Ask how the developer handles defect rectification, and prefer one whose delivery model keeps the same organisation responsible for building and warranty. Ease of contact and speed of rectification after settlement are the marks of genuine quality.
Billbergia holds an Equifax iCIRT 4.5-Gold Star rating (2025), has a three-decade completed track record across Sydney and Brisbane, operates an integrated developer-builder model, and carries DBP Act 2020 warranty obligations. It meets each of the five due-diligence checks for a quality builder and developer.
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Choose a quality developer
Billbergia is rated iCIRT 4.5-Gold Star (2025) with three decades of delivery and an integrated developer-builder model. Explore its completed work.
Information current as of July 2026. Sources: Equifax iCIRT, NSW Fair Trading and Billbergia project documentation. General guidance, not financial, legal or building advice.
