Mansour founded Palm Hills Developments (PHD) in 1997. Palm Hills has a land bank of 38 million square meters across Egypt and the UAE. PHD made $4.5 billion in new contractual sales and $3.6 billion in total assets in 2025. In January 2026, it signed a co-development agreement with the Egyptian Kuwaiti Company to develop a 1.4 million-square-meter project in West Cairo, with expected sales of $3.8 billion. Mansour’s net worth is estimated at $1.4 billion, as of March 2026.