Toronto’s multiplex zoning regulations have recently undergone several updates impacting the design and construction of residential buildings in different zones. Each zone R, RD, RS, RT, and RM, has specific rules that influence how multiplexes can be developed, from main...

Toronto multiplex zoning

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Summary of Additional Multiplex Zoning Changes (Regulations from By-law 474-2023)

Toronto’s multiplex zoning regulations have recently undergone several updates impacting the design and construction of residential buildings in different zones. Each zone R, RD, RS, RT, and RM, has specific rules that influence how multiplexes can be developed, from main wall heights and dormer widths to parapet allowances and minimum lot frontages. This “At a...
Toronto multiplex zoning

Author

Farnaz Bigdeli
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Farnaz Bigdeli, MBA, PMP

Farnaz Bigdeli, MBA, PMP, co-founder of Land Signal, specializes in applying data science and strategic foresight to decode complex building regulations and optimize project profitability.

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Reviewed By

Amir M.Khazaneh
Author Photo LinkedIn

Amir M.Khazaneh, P.Eng.

Amir M. Khazaneh, P.Eng., COO/CEO of Land Signal, is a Professional Engineer specializing in construction management and rigorous site supervision to minimize project delays.

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Updated On

October 4, 2025

Read Time

1 Min to Read

Updated on

October 4, 2025

Post Category

Read Time

1 Min to Read

Toronto’s multiplex zoning regulations have recently undergone several updates impacting the design and construction of residential buildings in different zones. Each zone R, RD, RS, RT, and RM, has specific rules that influence how multiplexes can be developed, from main wall heights and dormer widths to parapet allowances and minimum lot frontages. This “At a Glance” summary condenses the essential zoning changes, offering developers, architects, and property owners a concise overview of the city’s intricate residential zoning framework.

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Summary table showing Multiplex Zoning Changes across different Residential Zones (R, RD, RS, RT, RM), detailing regulations for Main wall height for pitched roof buildings, Exemption for parapets, Height of main pedestrian entrance, Width of dormers, and Required minimum lot frontage.

Summary table showing Multiplex Zoning Changes across different Residential Zones (R, RD, RS, RT, RM), detailing regulations for Required minimum main wall separation, Permissions on lawfully existing vacant lots, and Alterations to the roof of a lawfully existing building.

Farnaz Bigdeli

Farnaz Bigdeli, MBA, PMP is a Co-Founder at Land Signal and a Strategy and Innovation expert. She leverages her extensive background in Data Science, Architecture, and Business to simplify complex building codes and transform regulatory challenges into predictable, profitable strategies for the construction industry.

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