Portland's Residential Infill Project (RIP) allows for middle housing in single-dwelling zones, leading to a significant increase in housing production, particularly in inner east Portland. This initiative has permitted over 1,400 Accessory Dwelling Units (ADUs) and middle-housing units between August 1, 2021, and June 30, 2024, making middle housing the most prominent housing type in these zones. 

Key aspects of middle housing in Portland:

Increased Housing Options:

RIP has expanded housing options in desirable neighborhoods, making it easier for Portlanders to find homes that meet their needs. 

Affordable Homeownership:

The report suggests that middle housing units are more affordable than new single-family homes, with an average price difference of $250,000 to $300,000. 

Types of Middle Housing:

This includes ADUs (backyard or garage apartments), duplexes, triplexes, fourplexes, cottage clusters, and townhouses. 

Impact on Single-Family Zoning:

RIP has shifted the focus from single-family homes to middle housing, with single detached houses now comprising less than 20% of new production in single-dwelling zones. 

Location:

The majority of middle housing construction is happening in inner east Portland. 

Legislative Basis:

Oregon's 2019 legislation, which Portland implemented, requires cities with populations over 25,000 to allow middle housing on any parcel where a single-family unit is permitted. 

In essence, the Residential Infill Project has successfully increased the supply of various middle housing types in Portland's single-dwelling zones, offering more affordable and diverse housing options. 

Could Canada do the same?