High construction costs and rising interest rates on loans are increasingly causing order cancellations in residential construction.

In August, 11.6 percent of the companies surveyed were affected, after 11.5 percent in the previous month, according to a survey published on Monday by the Munich Ifo Institute.

"Since April we have seen that a striking number of projects have been canceled," said Ifo researcher Felix Leiss.

The framework conditions for housing construction have deteriorated sharply in recent months.

"Explosive construction costs, rising interest rates on financing and limited funding options are a heavy burden on the calculations of potential builders," said Leiss.

"Some projects become unprofitable as a result."

Up until a few months ago, the course in residential construction was still set for growth.

The companies also still had bulging order books.

"But with a view to future developments, fear is spreading," Leiss continued.

Many companies fear a downturn in business: the expectation indicator fell to minus 48.3 points, marking the lowest level since the survey began in 1991. The previous low was only reached last April with minus 47.4 points.

price increases and bankruptcies

The supply bottlenecks for building materials have meanwhile improved somewhat.

"Nevertheless, the material is still scarce in many places and therefore expensive," said Leiss.

In August, 36.4 percent of companies complained about delivery problems.

In July it was 45.6 percent.

The high energy prices made the building material - which is often energy-intensive in production - even more expensive.

Against this background, many construction companies are planning further price increases, the Ifo experts found out.

Because of the energy crisis, the industry even fears more bankruptcies.

"We will certainly see growth," said chief economist Andreas Geyer from the German Construction Industry Association (BVB) recently.

Thanks to the positive development, bankruptcies have fallen for ten years.

It is now difficult for companies to pass on the enormously increased energy costs to their customers.