Two Reform synagogues in the Harrow area have taken the first steps towards a potential merger.
Members of the Kol Chai community in Hatch End and the Middlesex New Synagogue have been invited to parallel open meetings on March 21 to discuss the option.
The idea is for the buildings to be sold to fund a purpose-built site for a combined adult membership of 1,300.
Kol Chai co-chair Neil Mendoza said: "Our area is an exciting and dynamic place to be Jewish. Harrow has the third largest Jewish population in London and Bushey is one of the fastest growing communities in the UK.