4 plex development involves building multi-family residences with four separate, self-contained units in one structure. Offering strong investment potential and the flexibility of residential zoning, 4 plexes
Building permit cost in Ontario ranges from $1,800 to $8,000+ for a typical residential project in 2026, depending on your municipality and project scope. Toronto charges a base fee plus $16.60 per square metre of new floor area.
The Ontario Building Code Guide 2026 outlines the critical changes every homeowner needs to understand. In 2026, the Ontario Building Code introduces major rules for fire protection, carbon monoxide alarms, zoning, permits, building construction codes, and energy efficiency.
