Total return, which combines changes in real estate values and rental income, was 0.2 percent in September, the same as in August.

"What the U.K. market needs is a further boost of confidence, particularly outside of the southeast, where some good news would be extremely welcome," Phil Tily, a managing director at IPD, said in the statement.

The U.K. economy has contracted in each of the three quarters through June, limiting demand for goods and services and hurting commercial landlords' ability to earn income. House prices declined for a third straight month in September, raising concerns that the economy is struggling to come out of the first double-dip recession since the 1970s, according to a report today from Acadametrics and LSL Property Services Plc.

Rents for shopping malls outside England's southeast fell 0.4 percent in September, IPD said.

Office values in London's West End rose 0.3 percent last month. Central London retail properties increased 1 percent, according to IPD.

The IPD index was compiled from appraisals of 3,559 properties valued at 32.7 billion pounds ($53 billion) at the end of September.