Australia's construction industry is being pulled in two very different directions. Government infrastructure projects and data centres are putting increasing pressure on construction costs, while demand for new homes is weakening. The latest Producer Price Index figures show just how difficult this combination is becoming for builders and developers.

Non-residential construction prices rose 1.7 per cent in the September quarter, accelerating from 1.0 per cent in June. Annual growth has reached 4.8 per cent. Victoria recorded a particularly sharp increase of 3.4 per cent in just three months, with annual growth now at 5.9 per cent.

The ABS identifies government-funded hospitals and schools, along with private data centre developments, as major sources of demand. These projects are competing for skilled workers, particularly in concrete, mechanical and electrical trades. Higher energy, freight and materials costs are adding further pressure.

This is happening against an already substantial government infrastructure pipeline. Infrastructure Australia estimates that major public infrastructure projects will account for $242 billion in spending over five years, an increase of 14 per cent on its previous forecast. While these projects deliver important public services, they also place considerable demands on an industry already struggling with labour shortages and weak productivity.

Residential construction is experiencing a very different set of conditions.

The prices builders charge customers to construct new houses rose 1.0 per cent in the September quarter, down from 2.0 per cent in June, reflecting weakening demand. However, the costs builders face are continuing to increase. Prices for building materials rose 3.9 per cent over the year, adding to pressure from labour, financing and other expenses. This means builders have less scope to increase what they charge customers, even as their own costs continue rising.

The disconnect is becoming increasingly apparent. September's inflation figures showed that new dwelling prices were unchanged during the month, with builders increasing discounts and promotional offers to attract purchasers. This is despite ongoing increases in labour and materials costs.

Builders are finding themselves caught between rising costs and buyers who are increasingly unwilling or unable to pay higher prices. Higher interest rates are making the situation worse, reducing borrowing capacity while increasing the cost of financing construction.

Conditions are particularly challenging for apartment developers. Construction price growth for apartments and other residential buildings accelerated from 0.8 per cent to 1.3 per cent in September. Unlike detached housing, apartment developments generally require substantial presales before financing can be secured. Rising construction costs increase the prices developers need to achieve, while weaker demand makes those presales more difficult.

Recent government housing policy changes have done little to improve this situation. The decision to restrict negative gearing to new homes from July 2027 was intended to redirect investors towards new construction. While the proportion of investor lending going towards new homes has increased, our research shows that the actual number of these loans has declined. Investors are not moving into new construction in the numbers needed to offset weaker demand.

The ban on new SMSF borrowing arrangements for residential property, which took effect in August, has also removed a potential source of demand. While relatively small in the context of the overall housing market, SMSF investors can be particularly important for apartment developments that depend on investor presales.

The result is an increasingly divided construction sector. Government and data centre investment is supporting activity and keeping pressure on costs, while residential builders and developers are struggling to make projects financially viable. This will ultimately make Australia's housing shortage more difficult to address.

The challenge is that weaker residential demand is unlikely to ease construction cost pressures. Government projects and data centres are continuing to compete for labour and materials, regardless of what is happening to new home sales.

Australia now has a construction industry where some sectors are experiencing strong demand and rising prices, while others are struggling to find buyers. For residential builders, that is an increasingly difficult environment in which to operate.

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