The pledge follows a similar scheme last year, where architects offered their services to transform vacant buildings into shelters for the homeless over the Christmas period.
Crisis asked for help once again, and has seven buildings which need to be transformed into habitable spaces.
Crisis spokeswoman Phil Power, said: 'The buildings are donated for our use over eight days starting from December 23.
'The buildings are empty for various reasons, such as waiting to be sold, or waiting for a refurbishment, and so Crisis is given them to transform into shelters with the help of volunteers like Architecture for Humanity.'
The transformation work will be taking place in seven shelters across London this weekend, and is carried out entirely by volunteers.
To find out more, visit www.afhuk.org