You’ve found the perfect suburb. Strong population growth. Solid sales. Good buyer demand. Everything stacks up.
But there’s another piece of data quietly sitting in the background that can make or break your project: building approvals. The problem? Most developers either ignore it completely, or worse, misunderstand what it actually means. And that can lead to walking straight into a wave of competition you never saw coming.
The challenge is that many developers either don’t use this information at all, or worse, they misinterpret it. And that can lead to completely wrong assumptions about future supply.
So let’s unpack what building approval data actually means, where to find it, and more importantly, how it can help you make better development decisions.
The Terminology Trap
In everyday development language, a development approval (DA) is the planning permission you receive from council. Once that’s secured, you move on to obtaining a building permit, which allows construction to commence.
A Building Permit (or building approval) is the approval to start construction. But the Australian Bureau of Statistics (ABS) flips this around and this is where developers often get tripped up.
What developers call a development approval is generally recorded by the ABS as a “building approval.” Meanwhile, what developers think of as a building approval - the permission to start construction - is closer to what the ABS tracks as a “building commencement.”
This mismatch means that when developers look at ABS building approval data, they often assume it represents construction about to begin. In reality, it usually represents projects that have planning permission but may never be built.
Understanding this distinction is critical. Because once you interpret the data correctly, it becomes a powerful forecasting tool rather than a misleading statistic.
Potential Supply vs Actual Supply
The key insight is this: not all approvals become buildings.
Just because a project receives planning approval doesn’t mean construction will follow. In fact, a significant proportion of approved developments never proceed. Depending on the market cycle and location, anywhere between 40 and 60 percent of development approvals fail to move into construction.
There are several reasons for this:
This is why development approvals represent potential supply, not actual supply.
Building commencements move one step closer to reality. They indicate that construction has actually started and supply is entering the pipeline. Even then, commencement doesn’t guarantee completion. Projects can stall, funding can fall through, and partially completed buildings can sit idle for years.
Finally, building completions represent stock that actually reaches the market. By the time you see completions data, however, you’re already looking in the rear-view mirror.
So when you’re analysing supply, you really need to think in three stages:
Each tells a slightly different story.
Why This Matters for Developers
Understanding this pipeline gives you an enormous advantage when assessing risk. Most developers understand the importance of demand. But supply is the other half of the equation, and often the more overlooked side.
If you’re entering a market with strong demand but a massive wave of supply already approved, you could still struggle to sell.
Conversely, a suburb with moderate demand but very limited new supply can become a highly profitable environment. Scarcity drives competition among buyers, shortens selling timeframes and can support stronger pricing.
This is where building approval data becomes incredibly valuable.
It helps answer questions like:
These are all early warning signals you can see months or even years before they show up in sales data.
The Hidden Insight: Failed Projects
One of the most valuable insights from approval data isn’t the projects that get built - it’s the ones that don’t.
When a large number of approvals don’t proceed, it often indicates that developers misread the market. They may have designed the wrong product, underestimated costs, or assumed unrealistic sales prices
This is particularly common among small-scale or inexperienced developers who rely on optimistic assumptions. For more experienced developers, this creates opportunity. If others are getting approvals but not building, it suggests there is a disconnect somewhere in the feasibility. By identifying that gap and designing a more appropriate product, you can step into a market with reduced competition.
In other words, the data isn’t just about supply, it’s about understanding why supply isn’t materialising.
Using the Data Strategically
So how do you actually use this information?
Start by looking at trends over time rather than a single data point. One month’s numbers don’t mean much. But a consistent pattern does.
For example:
Comparing neighbouring suburbs can also be revealing. If one suburb shows significantly higher approval activity than surrounding areas, it may indicate developer concentration. Alternatively, low approval numbers in a high-demand area may point to planning constraints or limited available land.
These patterns provide context that raw sales data alone cannot.
Where to Find Building Approval Data
The primary free source for this information is the Australian Bureau of Statistics. The ABS publishes regular data covering approvals, commencements and completions across various geographic levels.
The downside is that the data is often presented in raw tables, which makes trends harder to visualise. Several third-party platforms transform this information into charts and dashboards, making interpretation easier. Many of these tools now operate on paid subscription models, but for developers actively sourcing projects, the investment can be worthwhile.
Whether you use raw ABS data or a paid platform, the key is consistency. Track the same areas regularly so you begin to understand the patterns.
Use BA Data as Part of a Bigger Picture
Like any dataset, building approval data shouldn’t be used in isolation.
It works best when combined with:
When these indicators align, the picture becomes much clearer. Strong population growth combined with low commencements, for example, can signal emerging undersupply. High approvals alongside slowing sales may warn of oversupply risk.
The goal is not to rely on a single dataset, but to use building approval data as an early warning system within a broader research framework.
The Bottom Line
Building approval data is often misunderstood, but when interpreted correctly it becomes a forward-looking supply indicator. It helps developers anticipate competition, identify opportunity and avoid crowded markets.
Remember that ABS building approvals usually reflect development approvals, not construction. Development approvals represent potential supply, while commencements represent projects actually entering the pipeline. Many approvals never progress, and understanding why can provide valuable strategic insight.
Developers who understand this pipeline gain a clearer picture of where the market is heading, not just where it’s been.
And in property development, the winners aren’t the ones reacting to today’s market. They’re the ones anticipating tomorrow’s supply.
But there’s another piece of data quietly sitting in the background that can make or break your project: building approvals. The problem? Most developers either ignore it completely, or worse, misunderstand what it actually means. And that can lead to walking straight into a wave of competition you never saw coming.
The challenge is that many developers either don’t use this information at all, or worse, they misinterpret it. And that can lead to completely wrong assumptions about future supply.
So let’s unpack what building approval data actually means, where to find it, and more importantly, how it can help you make better development decisions.
The Terminology Trap
In everyday development language, a development approval (DA) is the planning permission you receive from council. Once that’s secured, you move on to obtaining a building permit, which allows construction to commence.
A Building Permit (or building approval) is the approval to start construction. But the Australian Bureau of Statistics (ABS) flips this around and this is where developers often get tripped up.
What developers call a development approval is generally recorded by the ABS as a “building approval.” Meanwhile, what developers think of as a building approval - the permission to start construction - is closer to what the ABS tracks as a “building commencement.”
This mismatch means that when developers look at ABS building approval data, they often assume it represents construction about to begin. In reality, it usually represents projects that have planning permission but may never be built.
Understanding this distinction is critical. Because once you interpret the data correctly, it becomes a powerful forecasting tool rather than a misleading statistic.
Potential Supply vs Actual Supply
The key insight is this: not all approvals become buildings.
Just because a project receives planning approval doesn’t mean construction will follow. In fact, a significant proportion of approved developments never proceed. Depending on the market cycle and location, anywhere between 40 and 60 percent of development approvals fail to move into construction.
There are several reasons for this:
- Feasibility numbers no longer stack up
- Build costs increase after approval
- Developers can’t secure funding
- Poor product-market fit
- Novice developers underestimating risk
- Approval conditions that are too difficult to satisfy
This is why development approvals represent potential supply, not actual supply.
Building commencements move one step closer to reality. They indicate that construction has actually started and supply is entering the pipeline. Even then, commencement doesn’t guarantee completion. Projects can stall, funding can fall through, and partially completed buildings can sit idle for years.
Finally, building completions represent stock that actually reaches the market. By the time you see completions data, however, you’re already looking in the rear-view mirror.
So when you’re analysing supply, you really need to think in three stages:
- Development approvals (potential supply)
- Building commencements (actual supply pipeline)
- Building completions (finished stock hitting the market)
Each tells a slightly different story.
Why This Matters for Developers
Understanding this pipeline gives you an enormous advantage when assessing risk. Most developers understand the importance of demand. But supply is the other half of the equation, and often the more overlooked side.
If you’re entering a market with strong demand but a massive wave of supply already approved, you could still struggle to sell.
Conversely, a suburb with moderate demand but very limited new supply can become a highly profitable environment. Scarcity drives competition among buyers, shortens selling timeframes and can support stronger pricing.
This is where building approval data becomes incredibly valuable.
It helps answer questions like:
- Is there a surge of supply coming?
- Are developers pulling back from this market?
- Is funding tightening?
- Are feasibility challenges stopping projects?
- Is this market likely to become oversupplied?
These are all early warning signals you can see months or even years before they show up in sales data.
The Hidden Insight: Failed Projects
One of the most valuable insights from approval data isn’t the projects that get built - it’s the ones that don’t.
When a large number of approvals don’t proceed, it often indicates that developers misread the market. They may have designed the wrong product, underestimated costs, or assumed unrealistic sales prices
This is particularly common among small-scale or inexperienced developers who rely on optimistic assumptions. For more experienced developers, this creates opportunity. If others are getting approvals but not building, it suggests there is a disconnect somewhere in the feasibility. By identifying that gap and designing a more appropriate product, you can step into a market with reduced competition.
In other words, the data isn’t just about supply, it’s about understanding why supply isn’t materialising.
Using the Data Strategically
So how do you actually use this information?
Start by looking at trends over time rather than a single data point. One month’s numbers don’t mean much. But a consistent pattern does.
For example:
- Rising approvals with low commencements may signal feasibility issues
- High commencements suggest real supply entering the pipeline
- Falling approvals may indicate developer caution or tightening finance
- Low completions combined with strong demand may signal opportunity
Comparing neighbouring suburbs can also be revealing. If one suburb shows significantly higher approval activity than surrounding areas, it may indicate developer concentration. Alternatively, low approval numbers in a high-demand area may point to planning constraints or limited available land.
These patterns provide context that raw sales data alone cannot.
Where to Find Building Approval Data
The primary free source for this information is the Australian Bureau of Statistics. The ABS publishes regular data covering approvals, commencements and completions across various geographic levels.
The downside is that the data is often presented in raw tables, which makes trends harder to visualise. Several third-party platforms transform this information into charts and dashboards, making interpretation easier. Many of these tools now operate on paid subscription models, but for developers actively sourcing projects, the investment can be worthwhile.
Whether you use raw ABS data or a paid platform, the key is consistency. Track the same areas regularly so you begin to understand the patterns.
Use BA Data as Part of a Bigger Picture
Like any dataset, building approval data shouldn’t be used in isolation.
It works best when combined with:
- Population growth data
- Sales volume trends
- Days on market
- Vacancy rates
- Comparable sales
- Local planning changes
When these indicators align, the picture becomes much clearer. Strong population growth combined with low commencements, for example, can signal emerging undersupply. High approvals alongside slowing sales may warn of oversupply risk.
The goal is not to rely on a single dataset, but to use building approval data as an early warning system within a broader research framework.
The Bottom Line
Building approval data is often misunderstood, but when interpreted correctly it becomes a forward-looking supply indicator. It helps developers anticipate competition, identify opportunity and avoid crowded markets.
Remember that ABS building approvals usually reflect development approvals, not construction. Development approvals represent potential supply, while commencements represent projects actually entering the pipeline. Many approvals never progress, and understanding why can provide valuable strategic insight.
Developers who understand this pipeline gain a clearer picture of where the market is heading, not just where it’s been.
And in property development, the winners aren’t the ones reacting to today’s market. They’re the ones anticipating tomorrow’s supply.
