While there is no rent increase cap defined by the government as far as i know, A rent freeze decree was issued some time back. Since February 2008 rent increases were limited to 10% annually
Not only expatriates would be effected by a sudden rent increase, many newly married Qataris now lives in rented properties.

Yesterday, Barwa have backed off of their recently announced decision to increase rent on its property .This came after many complains over local media