I partly disagree with Lara. A property being affordable under stress does not automatically make the price sensible. Mixed-use buildings can vary too much by district, tenant profile and condition for a citywide trend to answer this.
I’d compare nearby sold properties, note the sale dates and...
Before assuming there is no structural work, ask what happens if walls, floor build-ups or service openings are altered. Even without an extension, the proposed routing may affect what approvals or building-management consent are needed.
The management office can also clarify working hours...