Going Triplex? Don’t Miss These 5 Must-Know Rules
- Henry Matthew Silva Rojas
- Jul 9
- 1 min read
Here are the Top 5 Things You Need to Know about triplex conversions in Ontario:
1. Ceiling Height Requirements Changed:
All 3 units must now have 6'-11" minimum ceiling height (not 6'-5" like duplexes).
2. Exits Matter:
Each unit needs its own dedicated exit or share 2 exits total. And YES—egress windows are still required!
3. You Can’t Keep Old Drywall:
To meet fire and sound ratings, you’ll need a 1-hour rated floor assembly (think: "5/8" fire rated drywall PLUS rockwool insulation = 50 STC too)..
4. Soft Costs Go Up:
You’ll likely need engineered drawings for HVAC and Plumbing. Not usually required for duplexes, but mandatory now.
5. Attic Units = High Effort:
Great ROI—but tricky to design exits and ceiling height. Get creative and call in the pros early.
Comments