Rental price growth measures

Why is the Zoopla measure higher than the ONS?

How much are rental prices growing? The BBC headline was:

Rents rising at fastest pace in 13 years, says Zoopla

Zoopla’s UK Rental Market Report suggested private rents were growing by 4.3%. That annual changes compares the value in September 2021 to a year earlier. In contrast, the Office for National Statistics index shows annual growth at 1.3%.

Why are these figures so different?

Construction and…