The Maps Are From the 1930s. The Consequences Are Not.
Walk through any American city and you will find neighborhoods still carrying the weight of decisions made nearly a century ago. The boundaries between thriving and struggling communities, between well-funded schools and underfunded ones, between homes that appreciate and homes that don't — many of these invisible lines were drawn by federal bureaucrats during the Great Depression. Understanding how those decisions were made, and how deeply they still shape the housing market that real estate professionals work in every day, is not just a history lesson. It is a professional necessity.
At a recent NAR expo in Washington, Braden Crooks of Designing the WE brought the "Undesign the Redline" exhibit to the attention of thousands of real estate agents. The message was clear: the affordability crisis, appraisal bias, and the racial wealth gap are not isolated, modern phenomena. They are the predictable outcomes of policy choices made decades ago — and understanding that lineage is the first step toward changing it.
What Was Redlining and How Did It Work?
During the 1930s, the federal government created the Home Owners' Loan Corporation (HOLC) to help stabilize the housing market during the Great Depression. As part of that effort, HOLC agents surveyed cities across the country and produced detailed residential security maps that graded neighborhoods by their perceived investment risk. The grading system ran from A (green, considered the best) to D (red, considered hazardous) — and it is the "D" designation that gave redlining its name.
Neighborhoods marked in red were typically those with significant Black, immigrant, or low-income populations. Federal mortgage guarantees and private bank loans were systematically denied in these areas. Homeowners in redlined zones could not access the same credit tools that were fueling generational wealth-building in green and blue zones. They could not refinance. They could not renovate. In many cases, they could not sell at competitive prices because buyers in their neighborhoods faced the same lending barriers they did.
Meanwhile, the Federal Housing Administration was simultaneously underwriting the rapid expansion of American suburbs — but with explicit guidelines that discouraged or outright prohibited the inclusion of Black families. The result was a two-tiered housing economy: one designed to grow wealth for white homeowners, and one designed to contain and devalue property in communities of color.
How Those Decisions Echo Through Today's Market
For real estate agents, the legacy of redlining shows up in concrete, measurable ways across nearly every aspect of the profession.
The Racial Wealth Gap and Homeownership
Homeownership remains the single largest driver of household wealth in the United States. Decades of exclusion from federally backed mortgage programs meant that entire communities of color were locked out of the wealth-building cycle at precisely the moment when it was most accessible to white Americans. The homeownership rate gap between white and Black Americans today is roughly as wide as it was before the Fair Housing Act of 1968 was passed. That gap represents trillions of dollars in missed equity, missed inheritance, and missed financial security — and it shapes who can afford to buy in today's market.
Appraisal Bias
Appraisals are supposed to be objective, but they rely heavily on comparable sales — meaning they are only as unbiased as the historical market conditions that produced those comparables. In neighborhoods that were redlined for decades, suppressed investment led to suppressed sale prices, which fed into suppressed appraisals, which continued to suppress investment. Studies have repeatedly shown that homes in majority-Black neighborhoods are appraised at significantly lower values than comparable homes in majority-white neighborhoods, even when controlling for property characteristics. This is not coincidence. It is the compounding effect of policy-driven devaluation.
The Affordability Crisis
Redlining also concentrated poverty and limited housing supply in ways that still reverberate today. When investment was denied to certain neighborhoods, infrastructure deteriorated, economic opportunity moved away, and residents had fewer options. At the same time, the subsidized suburban expansion created auto-dependent sprawl that made affordable housing in high-opportunity areas nearly impossible to develop. Today's affordability crisis — with its acute shortage of housing near jobs, transit, and good schools — is in large part the architectural result of those mid-century policy decisions.
What Real Estate Professionals Can Do With This Knowledge
The "Undesign the Redline" exhibit is not about assigning blame to individual agents. Most professionals working in real estate today were not alive when these maps were drawn. But awareness matters, because the market does not operate in a vacuum — it operates inside a structure built by history.
Agents who understand redlining's legacy are better equipped to recognize the structural barriers their clients face, advocate for fair appraisals, and support policy reforms that expand access to homeownership. They can also approach conversations about neighborhood "value" with a more critical eye, recognizing that perceived desirability is often a reflection of historical investment patterns rather than any inherent quality of a community.
Supporting fair housing initiatives, pushing back on discriminatory practices, and educating clients about their rights are all practical steps that flow naturally from this awareness. Organizations like the National Fair Housing Alliance and local fair housing centers offer resources and training that can help agents put that awareness into action.
The Lines Were Drawn. Now What?
The HOLC maps from the 1930s were never meant to be permanent. They were emergency-era tools that calcified into something far more enduring than anyone officially acknowledged. Today, scholars, advocates, and — increasingly — real estate professionals are working to trace those lines, name their consequences, and begin the slow, difficult work of drawing new ones.
For agents, that work begins with understanding the market not just as it is, but as it was made to be. The homes, the neighborhoods, the pricing patterns, the lending disparities — they did not emerge from neutral forces. They were designed. And what was designed can, with sustained effort and honest reckoning, be redesigned.