What Google actually allows
Google's GBP guidelines require that each address have signage, staff during stated hours, and the ability for customers to walk in. Mailboxes Etc., Regus virtual offices, WeWork hot desks, and home addresses you don't actually operate from will all eventually be flagged and suspended.
Profile suspensions are notoriously slow to reverse — often 30–90 days, sometimes permanent — and during that time you lose your reviews, photos, and Map Pack rankings.
The legitimate way to rank in more neighbourhoods
If you're a single-location Toronto business that wants to rank in North York, Scarborough, and Etobicoke, the right move is to build dedicated organic landing pages for each neighbourhood with unique content (case studies, area landmarks, local pricing notes, and area-specific FAQs).
These pages rank in the regular organic results above and below the Map Pack. Combined with neighbourhood-specific content marketing and links from local sites, they can drive significant lead volume from neighbourhoods you're not physically located in.