This unit's focus is to serve the Hajj and Umrah people in two aspects.

The first relates to the architecture of the ritual places and their different designs.

The second is relates to the housing of Hajja and Umrah people and visitors. It also takes care of the services provided to them.

The research of this Unit is focused on the architectural aspects. It is focused on the architectural studies of the Grand Mosque and Al-Masjid an-Nabawī (Prophet's Mosque) and areas with specific characteristics such as the Jamaraat area. The Unit also takes care of the activities of documentation, the architectural development of the heritage buildings and urban landmarks in Holy City of Makkah, Madinah and Holy Sites.

The Unit also takes care of studying the means of housing Hajj and Umrah people and visitors in Makkah, Madinah and Holy Sites. This includes the different architectural criteria, considerations and standards related to such places. The Unit explores different options and possibilities to increase the housing capacity of such holy sites, especially in Mina Holy Site through vertical expansion (folded tents and multi-storey tents) or horizontal expansion through utilization of foothills.

The Unit works on developing the design standards and criteria of housing, services and utilities in a way that suits the circumstances of Hajj and Umrah.

Since the inception of the Institute, the Unit provided distinguished services to Hajj and Umrah people. These services include the publication of guides and maps of the Holy Sites, Makkah and Madinah. The Unit also takes care of the field guiding aids including signs and color usage of different elements.