Soaring costs are making building new homes uneconomical in many areas and will restrict home completions below demand until the end of the decade, a survey of 12 property analysts and economists has found.

Cost pressures, which have sent dozens of builders to the wall, have become the biggest obstacle to builders, and mean that even when projects are approved they are not being built. That suggests the supply shortage driving the rental crisis is set to continue for years, the experts told The Australian Financial Review’s quarterly property survey.