The Chasidic community in Westcliff wants to build a new synagogue on the site of a disused warehouse.
According to plans submitted to the local authority, the shul on Hildaville Drive will include a mikveh and two opening roof lights for Succot.
The location is in the heart of a proposed eruv, approved last year.
Southend and Westcliff is served by an Orthodox congregation and a Reform shul.