Research for Impact: Someone Has to Understand Why Housing in Phoenix Keeps Becoming Unaffordable

The Impact Series spotlights urgent questions and real-world issues that need fresh thinking—and real research. Each post breaks down a problem, explores why it matters, and reveals where curiosity can turn into action. If you’re looking for something that sparks your interest and pushes you to do more than just learn—this is where you start.

The Economic Crisis We Can’t Ignore

Right now, someone in Phoenix is refreshing the webpage for a rental listing they can no longer afford, just hoping the price will go back down.

Perhaps the monthly rate jumped $400 in a year. Or the starter home they hoped to buy now costs twice as much as it did a decade ago. Or maybe they’ve just started to quietly calculate whether they can keep living near their job, their family, or the neighborhood they grew up in.

On the surface, things look optimistic. Look out your window, and you’ll see yet another stretch of desert being cleared for new housing, with construction crews pouring foundations and master-planned communities expanding farther into the valley. 

It looks like the city is solving its housing problem simply by building more, but housing remains out of reach for many nationwide. Across the United States, housing costs have risen faster than wages in many regions. In 2024, median rent increased by 12%, while renter income rose by only about 4%. Homeowners don’t have it much better, either; their costs rose 3.8% from 2023 to 2024, driven largely by rising insurance and mortgage costs.

The problem hasn’t spared Phoenix, where many say it's simply a matter of supply and demand: the city grew too quickly, and housing construction hasn’t kept pace. Others argue that investors and corporate landlords have turned homes into financial assets rather than tangible places to live. Others still blame zoning restrictions or construction costs, or even water concerns.

Every explanation captures part of the picture, but none of them fully explains it all. And meanwhile, the city keeps on growing. 

So how does a city surrounded by open land still become increasingly unaffordable? That problem remains, surprisingly, unresolved, and you might be the perfect person to solve it.

Why This Might Not Leave You Alone

Even if you aren’t involved in urban planning or real estate economics, Phoenix’s housing crisis likely affects you in some way. 

Beyond the obvious high rent and homeowner costs, the problem affects commute times in a metro area that’s already heavily dependent on cars. It influences whether teachers, nurses, and service workers can afford to live near their jobs, and it changes who stays in the city, who leaves, and which communities are fundamentally changed as a result. 

Just a decade ago, Phoenix was frequently hailed as one of the more affordable major metro areas in the country. People relocated here specifically because housing felt attainable, especially compared to places like Los Angeles or San Francisco. 

Now, that gap has narrowed, with the median home price here increasing by 134% in the last decade. The speed of the shift has left many residents feeling locked out of the market altogether. After repeatedly losing bidding wars despite offering above asking price, Phoenix-area buyer Dirk Larson told TIME, “I don’t want to be forced out. There’s a lot of people who feel they are being forced out.”

Where the Arguments Begin

This conversation is increasingly fragmented; some argue that the region just needs denser housing and faster construction approvals, while others worry that rapid development is overwhelming infrastructure, increasing traffic congestion, and putting additional strain on water supplies in an already drought-prone state.

There’s also disagreement about whether large institutional investors are significantly affecting affordability. In some neighborhoods, entire subdivisions have been purchased by companies, turning homes into long-term rentals. But researchers still debate how much these purchases actually shape regional pricing overall.

Again, there’s the question of water. Phoenix continues to expand in the middle of the Sonoran Desert, while climate pressures and long-term concerns about the Colorado River create growing uncertainty about future sustainability. Some people see housing affordability and water availability as deeply connected problems, while others argue those fears are exaggerated or politically weaponized.

The result is a flood of competing narratives that makes it difficult to determine where the real pressure points actually are. And while the arguments continue, affordability keeps slipping further away.

What We Actually Don’t Know Yet

Even with all the attention focused on housing in Phoenix, there’s still an enormous amount that researchers don’t fully understand. 

For example, experts still debate how much of the affordability crisis stems from supply shortages versus investment activity. Phoenix has built housing rapidly compared with many U.S. cities, yet prices have still surged dramatically over the past decade.

Researchers also continue studying how migration patterns affect affordability. How much did remote workers relocating from more expensive states influence housing demand after the pandemic? Did cash buyers and higher out-of-state incomes permanently reshape pricing expectations in certain neighborhoods? Which communities experienced the greatest displacement pressure as a result?

And then there’s zoning: some housing researchers argue that Phoenix’s development patterns themselves may be contributing to affordability pressures. Alison Cook-Davis, who researches Arizona housing policy, argues that Phoenix’s “single-family-home obsession is exacerbating its situation.”

Urban planners continue debating whether denser housing near transit corridors could meaningfully improve affordability, or whether infrastructure limitations, neighborhood resistance, and rising land values would continue constraining supply regardless.

Water, again, adds another layer of uncertainty: how should cities balance growth with long-term drought risk, and could future water restrictions influence housing development patterns or property values? How do developers, policymakers, and residents assess risk differently when planning for future expansion?

Even construction costs are difficult to untangle, as labor shortages, rising insurance costs, material prices, permitting delays, and interest rates all influence what developers can realistically build. In some cases, developers argue that building truly affordable housing simply no longer pencils out financially without public incentives or subsidies.

When housing becomes unaffordable, there’s rarely one clear decision-maker responsible for the outcome. Instead, the problem spreads across dozens of interconnected systems operating simultaneously.

Why This Hasn’t Been Solved (Yet)

At first glance, Phoenix is a city where the housing problem seems deceptively straightforward.

There’s land available. The metro area continues expanding. New developments appear constantly. So why not just keep building?

Because, unfortunately, almost every proposed solution collides with yet another system. Building farther outward increases dependence on highways, longer commutes, and infrastructure expansion, while building denser housing often triggers neighborhood resistance over traffic, parking, noise, or changing community identity.

Affordable housing projects frequently require subsidies, tax incentives, or public-private partnerships, but those programs cost money, and political agreement on funding them is often difficult to sustain over the long term. 

Then there’s the deeper financial tension underneath the entire housing market. For many homeowners, rising property values feel beneficial. Homes are often treated not only as shelter, but as investments tied to retirement, savings, and long-term financial stability. Policies that successfully lower housing prices could also reduce those home values, creating resistance even among people who acknowledge that affordability problems exist.

And layered over everything else is climate uncertainty. Extreme heat is intensifying across Arizona, with water pressures continuing to shape long-term planning discussions. Energy demand rises during brutal summer temperatures when millions of air conditioners run simultaneously across the Valley.

Housing affordability in Phoenix, as you can see, no longer exists as a standalone issue. It’s entangled with infrastructure, climate adaptation, transportation, energy systems, and the long-term sustainability of growth itself.

The Questions That Are Still Sitting There

The real work begins with you, not with quick answers, but with better questions.

Phoenix’s housing crisis sits at the intersection of economics, urban planning, environmental science, climate policy, infrastructure, and migration trends. The biggest unresolved questions include:

• How much did post-pandemic migration accelerate housing price increases across the Phoenix metro area?

• What role do institutional investors play in neighborhood-level affordability and rental pricing?

• Which zoning changes would meaningfully increase housing supply without overwhelming infrastructure?

• How might future water shortages reshape housing development patterns in Arizona?

• What transportation investments would reduce the economic burden of long commutes as the metro expands outward?

• Which communities face the highest displacement risk as prices continue rising?

• How do extreme heat and energy costs affect overall housing affordability for lower-income residents?

• Why has rapid housing construction in Phoenix not prevented affordability from worsening?

• What development models could balance continued growth with long-term environmental sustainability?

• How should cities evaluate whether growth itself is becoming financially or environmentally unsustainable?

If This Is the Question You’d Stick With

You don’t need to work in real estate or urban planning to notice that something feels tenuous and unstable here.

Maybe it’s watching neighborhoods change faster than expected, or hearing people talk about moving farther and farther away just to afford rent. Maybe it’s the strange contradiction of seeing cranes everywhere while housing still feels increasingly out of reach.

Or maybe it’s the realization that almost nobody seems to agree on what’s actually causing the problem.

If you find yourself wanting to move past headlines and understand how these systems connect, that instinct matters, and you don’t need to solve Phoenix’s housing crisis to begin researching it.

You could start by mapping rent increases across different parts of the Valley or by comparing water policies and development approvals. Or you could analyze how transportation access changes housing costs in different neighborhoods.

No matter where you start, and no matter where you find yourself staying,  research often begins much smaller than many people expect. The process starts not with unfailing certainty, but with the dogged decision to stay with a difficult question long enough to understand it more clearly.

This Is What Acting Can Look Like

Action doesn’t always begin with political campaigns or billion-dollar housing projects. Sometimes, action begins by refusing to accept oversimplified explanations for a complicated system affecting millions of people.

Research is what it looks like to stay with the problem long enough to trace how infrastructure, migration, climate pressures, economics, and public policy shape housing affordability simultaneously.

Examining zoning maps, analyzing migration data, comparing housing construction patterns with transportation access and long-term water planning… These are all powerful steps forward.

Through Polygence, you can work alongside a mentor who understands how to investigate these systems rigorously and thoughtfully. You can build a project that explores real data, tests assumptions, and contributes to a clearer understanding of one of the defining challenges shaping the future of cities like Phoenix.

With Polygence, you’re no longer just reacting to the housing crisis, but are learning how to investigate it. 

The Question That’s Still Open

Phoenix is still growing, and housing demand continues to rise. Infrastructure continues to expand outward, while questions about affordability, sustainability, and long-term resilience remain deeply unsettled.

At some point, new policies, development strategies, or entirely different models for growth may emerge. But right now, the pressure continues to build.

And eventually, someone will need to figure out how all these systems fit together before affordability slips even further out of reach.

If this is the kind of question you keep returning to, could that someone be you?