The Ajman Real Estate Regulatory Agency has published a list of the 172 approved towers on its website, compared with the 900 buildings that were planned.
'Some of the registration applications have been rejected but many other projects are still under process and may join the list, or not,' said Omar al Barguthi, the director general of ARRA.
'Some are registered but still have no escrow account because of banking requirements.'
Property developers across the Emirates have been forced to cancel or delay scores of residential developments after prices began to fall sharply last autumn.
Ajman started developing many of its projects later than other emirates, which has thrown the construction of hundreds of planned projects into doubt.