EDITORIAL: How About a Few More ADUs? Part One

Introduction: The Case for ADUs

When examining the current state of housing policy across the United States, one element stands out as both a practical and transformative solution to persistent affordability crises—Accessory Dwelling Units, or ADUs. These small, secondary housing units, typically built on existing residential lots, offer a pragmatic approach to increasing housing stock without the disruptive scale of new developments. Yet despite their growing recognition for their potential in urban planning, ADUs remain underutilized in many communities. As I reflect upon this policy space, I am struck by how few cities have fully embraced the institutional and cultural shifts that would be necessary to integrate these units effectively into their housing strategies.

The Historical Context of Housing Policy in America

The evolution of American housing policy has long been a tale of adaptation, driven by demographic shifts, economic realities, and political will. From the early 20th century's push for suburbanization to the post-war housing boom that defined middle-class aspirations, the narrative of housing has always been deeply intertwined with national identity. However, as we enter a new era marked by climate change, increased urbanization, and evolving family structures, it becomes increasingly critical to reassess how we define and regulate housing.

ADUs represent one such evolution—an innovation that, in many ways, mirrors the broader societal shift toward more sustainable and inclusive urban environments. Historically, they were often permitted under informal zoning practices but have since become subject to increasing regulation as municipalities seek greater control over their built environment. As I examine this policy space more closely, I see a tension between preservationist impulses and the need for adaptive change—a dynamic that has shaped housing discourse for decades.

Why ADUs Matter Now

In recent years, the urgency of housing affordability has intensified across much of the country. Rising rents, stagnant wages, and limited access to homeownership have created a perfect storm of housing insecurity. Cities like San Francisco, Los Angeles, and Seattle have become poster children for this crisis, but it is not limited to coastal metropolises—suburban communities and smaller cities are also experiencing similar pressures.

Here, ADUs emerge as a crucial tool in the policy toolkit. They offer a low-impact method of expanding housing stock, requiring minimal infrastructure investment while leveraging existing resources such as water, sewer lines, and electrical grids. In this context, ADUs are not merely about increasing numbers—they represent an institutional shift in how we think about space, ownership, and community.

Policy Challenges and Opportunities

The path forward for ADUs is not without its obstacles. Many municipalities have outdated zoning codes that either prohibit or heavily restrict ADU development. These policies often reflect historical assumptions about residential density, family structures, and neighborhood character that no longer align with contemporary realities.

For instance, in many jurisdictions, ADUs are limited to a specific size, require setbacks from property lines, or must be built on lots below a certain square footage. Such constraints can make development unfeasible or economically unattractive for developers and homeowners alike. The question, then, becomes not just whether ADUs should be permitted but how they should be regulated to maximize benefit while minimizing unintended consequences.

"The most important aspect of the ADU policy discussion is not simply how many units we can build, but how effectively we can shape a new housing ecosystem that reflects our changing demographics and values."

Lessons from Leading Jurisdictions

Some cities have already begun to reimagine zoning codes with ADUs at their core. Portland, Oregon, for example, has long championed policies that promote diverse housing types, including ADUs, through flexible regulations and streamlined permitting processes. Similarly, Austin, Texas, and Denver, Colorado, have started to modernize their approach to secondary units in response to rapid growth and shifting demographics.

These examples offer a window into what is possible when policymakers prioritize innovation over tradition. In these places, ADUs are not seen as an afterthought or a compromise—they are a deliberate part of a larger housing strategy that aims to create more equitable and livable communities.

Implications for the Future

As we move forward, it is essential to recognize that the debate around ADUs is not just about zoning or housing supply—it's about reimagining how communities function. The policy framework must evolve to reflect changing norms around family size, income diversity, and intergenerational living.

From my vantage point, the real value of ADUs lies in their ability to offer a bridge between older and newer generations, between financial necessity and community stability. In this way, they are not just about building more homes; they are about fostering more resilient and inclusive communities.

Conclusion: A New Chapter for Housing Policy

The journey toward greater adoption of ADUs is one of incremental reform with profound potential. While the policy landscape remains fragmented across states and municipalities, there exists a compelling case for broader institutional support and more consistent regulatory approaches. As we look ahead, I believe that cities and counties will find themselves increasingly drawn to the ADU model—not because it's trendy, but because it is practical, equitable, and rooted in long-term thinking.

In our next installment, we will examine specific implementation strategies and how these policies can be tailored to meet the unique needs of different communities. Until then, I invite readers to consider how their own neighborhoods might benefit from a more flexible approach to housing development.