The financial pieces that don't exist with a house
Monthly condo fees cover shared building costs — maintenance, insurance on common areas, amenities — and vary significantly building to building, so getting the actual current fee and its recent history (has it been rising sharply?) matters more than assuming it'll be manageable. The status certificate, a legally required disclosure document for a condo purchase, shows the building's financial health, reserve fund status, and any pending special assessments — worth having a lawyer review it before finalizing a purchase.
Property tax and insurance still apply to a condo, just calculated differently than a house — worth getting real numbers for the specific unit rather than assuming they'll simply be lower because the unit is smaller.
Storage loss is the most underestimated part
A house typically has a garage, a basement, an attic, and often a shed — a condo usually has none of that, replaced at most by a small storage locker. This is consistently the part of a house-to-condo move that surprises people most, since it's easy to plan around furniture that fits the new square footage while forgetting about seasonal items, tools, and everything else that lived in those extra spaces.
Deciding what genuinely needs to be kept versus what can be sold, donated, or given to family should happen with this storage reality in mind from the start, not discovered after the move when there's nowhere left to put things.
Rules and lifestyle fit, before signing anything
Condo rules can cover pets, rentals, noise, and renovations in ways a house never restricted — reviewing the building's specific rules, not a generic condo assumption, before committing avoids an unpleasant surprise after the move. It's also worth an honest conversation about lifestyle fit — less yard work and maintenance is the appeal for many people, but less personal outdoor space and closer neighbours is the trade-off, and it genuinely doesn't suit everyone.