A basement is the most undervalued square footage in a Toronto home. Done right, it adds a rental unit, a guest suite, a home office, or the kids' floor without enlarging the footprint or moving anyone out for a year. Done wrong, it is a damp, low-ceilinged room that nobody wants to be in.
The difference is in the parts you cannot see — the membrane against the foundation, the underpinning footings, the egress window well drainage, the sub-panel sized for the future. We treat the invisible work as the work that matters most.