Built in the Qajar dynasty by Abd-o-Samad Khan, father of Agha Khan and great grandfather of Azim-o-Saltaneh Sardar, Sardar Mosque is situated some 500m away from the Friday Mosque. In 1951, the latter installed a big clock on top of the entrance door, which is why it is also called the Sa’atlu (clock) Mosque.

Sardar Mosque is situated in Imam Street, along the Gholam Khan district in Urmia.
It is divided into two separate sections. The main section is the large Shabestan, a 22m by 18m oblong covered area. The oblong shape is broken at the southeastern corner of the Shabestan, where 12 octagonal columns with arched capitals enhance the beauty of the mosque.

At the very end, a small 10m by 12m Shabestan opens into the main Shabestan. The shape is similar to the large one, only plainer and with no adornments. A plain brick altar is built at the southern side.

The beautiful altar of the mosque is inside one of the false arches in the south side of the main Shabestan. It is adorned by seven-colored tiles with yellow background and floral designs in blue, pink, white and brown. The holy verse of Ayat-al Korsi from the book of Quran is inscribed inside one of the outer margins of the altar. At the corner of the altar, the year 1330 AH signifies the date when the restoration of the mosque was complete.