Citizen Developers

Small Housing stock image: ADU

Launched by the Community Planning Collaborative (CPC) in August 2024, the California ADU Plans Gallery is an innovative web application showcasing an array of prefabricated and traditional site-built designs. While tailored to U.S. jurisdictions, this gallery offers valuable insights for Canadian audiences, particularly for municipalities and planners exploring accessory dwelling units (ADUs) as a way to expand housing supply. Examples such as prefabricated designs and statewide pre-approvals can serve as inspiration for Canadian local governments considering ADU implementation in their communities. The site also includes a demo, offering local governments a preview for launching a similar custom tool.

“The California ADU Plans Gallery gives local governments a place to demonstrate what’s possible for their communities while providing a publicly accessible database of prefabricated plans approved for use statewide,” said David Driskell, principal at CPC, in a press release announcing the launch. “Digital tools like the ADU Plans Gallery help local governments assist their residents through the challenging ADU process and expand housing supply in their existing neighborhoods.”

Explore the California ADU Plans Gallery here.

“Throughout the United States, the housing deficit has created an affordability crisis. The underbuilding of new homes following the recession coupled with restrictive policies has led to historically low housing supply–and the high costs that come with it. To highlight the solutions that will address this crisis, Zillow and the Casita Coalition have assembled a playbook of strategies to “Build the Middle” by expanding affordable, middle-scale housing options.”

Our friends at Zillow & the Casita Coalition have published a useful playbook that highlights innovations in the field of gentle density housing, collating them in an actionable framework template.

Download the Playbook.

Our friends at Happy Cities have crafted a one-of-a-kind toolkit designed to enhance social well-being through thoughtful multi-unit housing designs, supporting diverse individuals of all ages, backgrounds, abilities, household sizes, and incomes. As they describe it:

“Over 2023 and 2024, Happy Cities, Hey Neighbour Collective, and researchers from Simon Fraser University worked together with five local municipalities and one First Nation to co-create new policies to encourage sociable multi-unit housing design.

“Building on the learnings from this project—and nearly a decade of prior research—Happy Cities and Hey Neighbour Collective have published a new design toolkit of evidence-based strategies to nurture social wellbeing multi-unit housing. The design principles and actions equip policy makers, planners, designers, and community members to build and advocate for more socially connected, inclusive communities, drawing on long-term research and engagement with residents and housing industry actors—including non-profit housing providers, city planners, architects, and market developers.

“In the face of growing challenges—including an acute housing affordability crisis, extreme weather, social isolation, and an aging population—our social connections are one of the strongest resources we have to chart a more sustainable, resilient path forward.”

Download the Toolkit.

Discover the New Standardized Designs for Gentle Density Homes in B.C.

In September 2024, the Government of British Columbia released a series of free, standardized designs to help facilitate the development of gentle density homes. These designs are versatile, using a “building blocks” approach that allows for customization. You can mix and match elements to add features like garages or additional bedrooms and stack up to three storeys high. The collection includes a range of options from duplexes and triplexes to quadplexes and townhouses, with various roof shapes and exterior finishes to blend seamlessly into existing neighborhoods. There are also designs for accessory dwelling units, like laneway homes, and adaptable cottages perfect for aging in place.

All designs comply with the 2024 B.C. Building Code and can be tailored to fit different lot sizes and site conditions across the province. The design files are available for free download and have been compiled into a convenient catalogue for easy browsing.

These standardized designs are expected to save time and reduce costs for local governments and builders, speeding up approvals and construction. This initiative is a key component of the Homes for People action plan, aimed at unlocking more homes faster by creating favorable conditions for rapid housing development.

Click the image to view the designs and access the full document.

As housing affordability challenges escalate, an increasing number of middle-income renter households are facing cost burdens. In response, states and localities are implementing policies to address these needs. While these programs aim to expand affordable housing in high-cost areas, they face criticism for potentially diverting resources from lower-income households.

This new research paper from the Harvard Joint Center for Housing Studies explores these middle-income housing initiatives, evaluating their goals, benefits, and the tradeoffs involved. By examining eleven state and local programs, the paper finds these initiatives are becoming more common across diverse regions, primarily focusing on expanding housing supply for the “workforce” based on area median income.

However, these programs often fall short of assisting the most cost-burdened renters, who are predominantly lower-income. Moreover, the demographic disparity, with middle-income renters being disproportionately white, raises concerns about reinforcing racial inequities.

The paper recommend designing middle-income housing programs that do not detract from resources for the lowest-income households, operate in areas where the market fails to serve middle-income renters, and provide additional benefits to lower-income communities. Read the full report to understand the complexities and potential solutions in addressing middle-income housing needs.

Vermonters need better housing options and more affordable homes. Achieving this goal requires changing how homes are built in Vermont, particularly regarding the location and types of new homes.

Currently, Vermont’s housing production is focused on large and expensive single-family homes on sizable lots and large-scale multi-family apartments. However, Vermonters seeking housing options in-between, such as duplexes, four-plexes, cooperative housing, senior housing units, age-friendly homes, or townhouse condominiums, face limited choices. Regulatory and financial barriers have made developing diverse homes on a smaller footprint more challenging and complicated for small-scale developers who want to contribute to their communities.

This project aims to change that by unraveling regulatory complexities and reviving common-sense solutions that work for Vermont, such as Missing Middle Homes (MMH). The Vermont Homes for All Toolkit and community engagement process will re-introduce MMH to Vermont by focusing statewide attention on small-scale gentle infill and incremental development as a strategy to address Vermont’s housing and affordability crisis.

Video: In March 2024 the Department of Housing & Community Development launched the Homes for All Toolkit at a special event that brought together novice and emerging small-scale home builders, community development professionals, and local leaders interested in innovative home-building and home-renovation solutions to connect, network, and learn. Watch the Summit recording here!

In 2023, the Terner Center published “Making It Pencil: The Math Behind Housing Development” to assist policymakers in understanding the financial feasibility of large-scale, for-rent midrise apartment buildings. However, recent state and local land use reforms have focused on smaller-scale housing in lower-density neighborhoods, including accessory dwelling units (ADUs), duplexes, and fourplexes, often referred to as “missing middle” housing. States like California, Oregon, and Montana, along with cities such as Minneapolis and Portland, have introduced legislation and rules to promote this housing growth.

This policy paper employs the methodology from our 2023 report to analyze the development characteristics of missing middle projects. Through a series of project pro forma case studies across four California markets, the report finds that many missing middle housing types are not financially feasible, with four-unit ownership buildings being the most challenging to develop. Despite these challenges, missing middle housing can play a crucial role in providing entry-level homeownership and naturally affordable rental options. It is imperative for local and state policymakers to reexamine regulations that hinder the development of missing middle housing, such as lot size, parking, and insurance requirements.

Name: Happy Cities

About: Happy Cities is an urban planning, design, and engagement consulting firm with a mission to create happier, healthier, more inclusive communities. As part of its housing practice, Happy Cities advises municipalities, developers, and housing providers on strategies to support resident wellbeing throughout development and after move-in.

The organization’s Happy Homes research shows how intentional design can reduce social isolation, support age-friendly homes, and boost community resilience in multi-unit buildings, culminating in a toolkit to help housing providers turn wellbeing evidence into action. Happy Cities has applied these design strategies to developments like Our Urban Village Cohousing, an innovative missing middle project that offers a promising solution to Vancouver’s housing and social isolation crises. Along with showcasing the many benefits of gentle density, the project identifies solutions to reducing some of the financial and policy barriers that can impede community-oriented housing models.

For more information, head to their website.

ReHousing is a pioneering research initiative focused on converting single-family homes into multi-unit housing. Their approach emphasizes affordable, common-sense design to create high-quality, well-designed living spaces. Explore more about their work on their profile page on the Gentle Density Toolbox.

ReHousing leads numerous innovative projects, including a design catalogue featuring cost-effective, gentle density designs. This catalogue offers unique insights into the challenges and opportunities presented by various house configurations and lot sizes.

The designs in this catalogue have been categorized based on the relative cost and complexity of construction. Each design is mindful of future phasing, so you can move from one level to the next without having to redo work that you have already done. Each drawing represents one of the thirteen common house types found throughout Toronto, where ReHousing is based.

The full catalogue can be accessed here.

As Vancouver grows and evolves, we need to ensure that there are housing options that meet the needs of the diverse households that live and work here, including more “missing middle” housing options. With the help of Quickviz, the City of Vancouver developed this useful video that illustrates the changes proposed to allow more of this type housing in low density neighbourhoods across the city as part of the implementation of the Vancouver Plan. The animation depicts a standard block with a variety of housing options, including multiplexes (buildings with up to 6 units on a single lot).