The Morocco international is valued at £2.5million and the Hammers are believed to be closing in on a deal.
The 24 year old has been linked with Monaco but is keen to continue his career in London and the Hammers like the versatile left-sided player, who has been at Palermo for two years.
Lazaar’s arrival would be the third since those comments after both Andre Ayew and Arthur Masuaku arrived at the club in recent days.