Old South and Wortley Village feature some of London's most sought-after, historic rental properties. However, for landlords looking to add a secondary rental suite to maximize cash flow, these century homes present a massive structural hurdle: the basements were originally built for coal storage and utilities, not modern tenants.
The Heritage Home Height Problem
The Ontario Building Code (OBC) strictly mandates a minimum continuous ceiling height of 1.95 meters (6 feet 5 inches) for a compliant basement suite. In Old South, it is incredibly rare to find an original basement with this clearance. Low-hanging ductwork and century-old timber joists usually drop the height well below the legal minimum, rendering the unit non-compliant.
Underpinning Rubble Foundations
Attempting to simply "dig out" a dirt or shallow concrete floor without an Ontario-licensed structural engineer is a severe liability that routinely triggers immediate municipal Stop Work Orders. To legally lower the floor, you must utilize engineered structural interventions.
Because many Old South homes feature rubble or brick foundations rather than modern poured concrete walls, structural excavation here requires highly specialized engineering oversight to ensure the primary structure above does not shift or collapse.
Deep Dive: Unsure which structural intervention is safest for your older property? Read our comprehensive Comparison of Bench Footings vs. Underpinning.