http://www.bloorstreetunited.org/GCOProposal.html
Under the plans currently available online, the original nave will be replaced with a large, glass-walled square space to allow in the maximum amount of sunlight. The area behind the church, currently a parking lot, will form the base of the General Council offices and condominium tower. The appearance and layout shown here is preliminary, but the design is one favoured by the church.
The Bloor Street United Church was selected from several locations in Canada vying for the new headquarters. The lease on the current offices at Bloor and Islington will expire in 2015, which prompted the church to look for a new space. The location in the heart of Toronto and the local congregation were apparently deal-breakers in the decision.