This website is a guide and is not intended to replace professional advice. Please see our disclaimer for more information!
S Design Catalogue
Multiplexes
A parcel-based multiplex design catalogue
Cities across Canada are changing rules to allow for multiple housing units on lots previously zoned for single-family homes. The City of Toronto has changed rules to allow for fourplexes as-of-right, allowing an additional 5th unit as a garden suite or laneway house, and is now looking into allowing sixplexes in some parts of the city. ReHousing has mapped out the most common 1,140 lot sizes across Toronto and completed schematic designs with stair types and basic unit distribution for each lot. 17 of those designs have been refined and can be seen in detail below.

This website is a guide and is not intended to replace professional advice. Please see out disclaimer for more information!
Choosing a stair is more than just a step count
The fourplex designs below are categorized based on their stair type and unit distributions: Stacked, Flats, and Scissor stairs. Stacked townhouses include 2-level units with straight-run interior stairs; Flats are one-unit per level with two sets of half-turn stairs; and the Scissor stair type includes a mix of both unit types with intertwined interior stairs providing the two means of egress. Designs correspond to the most common lot sizes in the Prewar, Postwar, and Metroburb eras of urban development in Toronto.



Meet the Fourplexes
Each drawing in the catalogue below represents a fourplex on a parcel size commonly found across the city. When you click on a fourplex image, it will take you to a page containing measured floor plans and visualization of the proposed design.
Click Here for more information about lot sizes!
Meet the Sixplexes
The Sixplex study focuses on Ward 23 - Scarborough North, within the City of Toronto. Parcels in the RD, RS, and RT zoning categories were studied and sixplex designs were tested on a range of lot sizes. Three of these schematic designs were further developed and can be found below.
THIS WEBSITE, INCLUDING ALL DATA AND INFORMATION INCORPORATED HEREIN, IS BEING PROVIDED FOR INFORMATION PURPOSES ONLY AND IS NOT INTENDED FOR AND HAS NOT BEEN APPROVED FOR USE FOR CONSTRUCTION AT ANY LOCATION.
For certainty, ReHousing (Canada), The University of Toronto, John H. Daniels Faculty of Architecture Landscape and Design, and LGA Architectural Partners provides no representation or warranty regarding any use of or reliance upon this website, including any representation or warranty that this website complies with applicable laws (including any applicable zoning by-laws or building code requirements) and any representation or warranty that any cost estimates included in or based upon this website have been validated by the applicable market. Any use of or reliance upon this website by any person for any purpose shall be at such person’s sole risk and ReHousing (Canada), The University of Toronto, John H. Daniels Faculty of Architecture Landscape and Design, and LGA Architectural Partners shall have no liability or responsibility for any such use of or reliance upon this website by any person for any purpose. Prior to any use of or reliance upon this website by any person for any purpose, consultation with a professional architect duly licensed in the applicable jurisdiction is strongly recommended.
For certainty, ReHousing (Canada), The University of Toronto, John H. Daniels Faculty of Architecture Landscape and Design, and LGA Architectural Partners provides no representation or warranty regarding any use of or reliance upon this website, including any representation or warranty that this website complies with applicable laws (including any applicable zoning by-laws or building code requirements) and any representation or warranty that any cost estimates included in or based upon this website have been validated by the applicable market. Any use of or reliance upon this website by any person for any purpose shall be at such person’s sole risk and ReHousing (Canada), The University of Toronto, John H. Daniels Faculty of Architecture Landscape and Design, and LGA Architectural Partners shall have no liability or responsibility for any such use of or reliance upon this website by any person for any purpose. Prior to any use of or reliance upon this website by any person for any purpose, consultation with a professional architect duly licensed in the applicable jurisdiction is strongly recommended.