What the war in Iran could mean for the Toowoomba property market.

The war unfolding in Iran might seem like something happening on the other side of the world, but the economic ripple effects are already showing up here in Australia and they’re showing up fast. The first place most of us notice it is at the bowser.

Petrol prices have already pushed past $2 per litre, and I recently pulled in to fill up my diesel 4x4 and nearly fell over when the pump stopped at $2.539 per litre. That’s not just annoying for motorists, it’s one of the first warning signs that inflationary pressure is building again. Oil is a foundational input across the entire economy. When oil prices spike, the impact rarely stops at the service station. It flows through transport networks, manufacturing, logistics, and construction and eventually lands in the property sector.

One of the biggest impacts will likely be transport costs.

Nearly every product used in construction or renovation needs to be moved - often multiple times - before it ends up on site. Materials are trucked from manufacturers to warehouses, from warehouses to suppliers, and from suppliers to builders. When diesel prices rise, freight costs rise with it. Those additional costs eventually get baked into the price of building materials.

Then there’s steel and metal products, which are heavily energy-intensive to produce. Manufacturing steel requires significant energy input, so when global energy prices climb, steel prices tend to follow. That impacts everything from structural framing and roofing to fencing and reinforcing steel used in slabs. It doesn’t stop there either.

A surprising amount of modern construction relies on petroleum-based materials - things like PVC piping, insulation products, waterproofing membranes, sealants, and plastics used throughout the building process. When oil prices rise, the cost of producing these materials often increases as well. The end result is fairly predictable. Building becomes more expensive.

When construction costs rise, developers and builders naturally become more cautious. Margins tighten, some projects get delayed, and others simply stop stacking up financially. When that happens, the pipeline of new housing supply slows down. And in markets like Toowoomba - where demand remains strong and population growth continues - restricted supply can place upward pressure on existing property values and rents.

There’s also the interest rate piece to consider.

Recent inflation data showed inflation beginning to rise again, which prompted the Reserve Bank of Australia to increase the cash rate by 25 basis points in February 2026.  If global energy prices continue to climb, that pressure could extend the inflation cycle further…. I’d also go so far as to call it a sure thing with another increase announcement later this month.

Higher transport costs, higher production costs, and higher building costs all contribute to inflation which can make it harder for the RBA to bring interest rates down in the near term. Now, that doesn’t mean the property market suddenly falls over. In many cases, the opposite can occur. When it becomes more expensive to build new homes, the replacement cost of existing homes rises, which can strengthen the value of established housing.

From an investor’s perspective, the key takeaway here isn’t fear - it’s awareness.

Property markets don’t exist in isolation. They’re influenced by global energy markets, supply chains, interest rates, and economic policy. Events happening thousands of kilometres away can quietly shape the economics of housing right here in Toowoomba.

And sometimes the first sign of it is simply the number flashing back at you on the fuel pump.