However, you could use a general collective noun like:
* A row of garages
* A cluster of garages
* A collection of garages
* A group of garages
You could also use a more descriptive phrase depending on the context:
* A network of garages (if they are interconnected)
* A line of garages (if they are arranged in a line)
* A complex of garages (if they are part of a larger building)
Ultimately, the best collective noun depends on the specific situation and the image you want to convey.