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Residential Multiplex

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Duplex, Triplex & Fourplex Regulation Changes

As Toronto’s population continues to grow, the city is embracing multiplex conversions to expand housing supply across Canada’s largest urban market. The City of Toronto has approved a city-wide zoning amendment that allows multi-unit residential homes in all residential zones.

In addition to these changes, multiplex development charges are now being waived—even if owners choose to convert or build units over time. This creates a powerful opportunity to transform a single-family home into a duplex, triplex, fourplex, or more—while significantly increasing your property’s rental value.

Take advantage of this opportunity by contacting SL Designs today to begin the evaluation process and understand how these regulations can work in your favor.

Transform Your Single-Family Home into a Legal Multi-Unit Property

SL Designs helps you design and build a fully compliant multi-unit property that meets all city by-laws—down to the finest construction details. Our expert team manages the process from concept to completion, ensuring your home is designed for functionality, durability, and long-term rental performance.

If you’re still in the acquisition phase, we can also assist in identifying the right properties in high-demand rental areas, with zoning that supports your conversion goals. From property selection to final build, SL Designs is your trusted partner in creating profitable multi-unit investments.

How to Convert Your Single-Family Dwelling into a Multiplex

With every residential multiplex conversion project, SL Designs keeps you informed at every stage. We provide a clear project roadmap, transparent budgeting, and regular updates—so you can fully understand your investment and move forward with confidence, without the stress of managing the process yourself.

Step 1 — Initial Consultation

During your FREE consultation, we take the time to understand your vision, lifestyle needs, and property details. This information is documented into a personalized project brief that guides the creation of initial conceptual designs.

Step 2 — Project Preparation

We review your existing floor plan and develop a clear, detailed project scope so you can make confident, informed decisions. Once goals, timelines, and budgets are aligned, SL Designs handles all the preparation required to move your project forward.

Step 3 — Design Development

After conceptual approval, our team prepares computer-drafted block-out drawings that illustrate unit layouts and exterior elevations. This stage provides a clear preview of the final result, with revisions made to ensure all design, zoning, and functional requirements are met.

Step 4 — Material Selection

While permit applications are underway, we guide you through selecting high-quality materials from trusted suppliers across Canada and internationally—balancing durability, aesthetics, and long-term value.

Step 5 — Construction Preparation

We complete final construction drawings with full structural engineering, precise dimensions, and detailed specifications. These comprehensive drawings ensure a smooth build phase and a high-quality, compliant multiplex conversion.

Frequently Asked Questions

Not every property qualifies. Zoning, lot size, building conditions, and local by-laws all play a role. SL Designs evaluates your property during the initial consultation to confirm feasibility.