Multiplex Conversions in the GTA: How to Turn One Property Into Four Income Streams

Ontario changed the rules — and most homeowners haven’t caught up yet. As of 2023, you can now build up to 4 residential units on a single lot across most of Ontario. No rezoning required. No severing the lot.

The Numbers That Make This Compelling

Unit 1: Main floor — $2,400/month. Unit 2: Legal basement suite — $1,700/month. Unit 3: Garden suite — $2,100/month. Total potential rent: $6,200/month or $74,400/year.

Timeline and Investment

A full multiplex setup typically runs $230,000 to $380,000 depending on what’s being built from scratch vs. what exists. Permitting alone can take 6–10 months across all units.

A $300,000 build generating $45,000/year in gross rent returns your capital in under 8 years — and the property is worth significantly more to the next buyer.

Why Turnkey Matters for Multiplex Projects

Managing three separate contractors for three separate permits on one property is a nightmare. ARU’s turnkey multiplex service handles all permits, all drawings, all construction, and all city correspondence — under one project umbrella.