In the mid-1970s civil rights campaigners painted a red line on the street, up 14th Avenue from Yesler Way to Union Street.

The paint made an existing boundary visible. Banks and mortgage companies withheld loans on one side. Real-estate agents refused to show homes across it. Deeds elsewhere stated who was not permitted to occupy the property.

The historian James Gregory of the University of Washington puts the frame plainly: "For most of its history, Seattle was a tightly segregated city, fully committed to white supremacy and the separation or exclusion of those considered not white."

The history that follows asks how the line was drawn, financed, challenged, and reproduced after housing discrimination became illegal.

Cities used to segregate by ordinance. In 1917, in Buchanan v. Warley, the US Supreme Court held that municipal segregation ordinances violated the Fourteenth Amendment.

Segregation did not end. It changed instrument. Developers, subdividers and estate agents turned to the racially restrictive covenant — a private agreement, written into deeds and plats, binding owners not to sell or rent to named racial and ethnic groups. In 1926, in Corrigan v. Buckley, the Supreme Court found these lawful, on the reasoning that they were agreements individuals entered into of their own volition rather than acts of government.

Segregation struck down as public law was rebuilt as private contract. Because a covenant ran with the title, its language could outlive everyone who signed it.

There is no need to characterise these documents. They are short and they are explicit. This clause appears in many deeds in Queen Anne:

Seattle's first known restrictive covenant was written in 1923 for new tracts at Victory Heights. University of Washington researchers have since found hundreds of covenants and deed restrictions in county archives, many written by developers—including William E. Boeing for Blue Ridge and Shoreline tracts.

The contradiction reaches across institutions and generations: two Boeing engineers later helped draft Seattle's plan for Japanese American redress, while neighborhoods developed by William Boeing had excluded people of Asian descent by deed.

From the 1920s through the 1940s, covenants excluded non-white residents—and sometimes Jews—from large parts of Seattle. The Central Area and Chinatown-International District remained among the few places open to Black and Asian American residents.

New subdivisions could simply be written restricted from the start. Older neighborhoods, already built and already sold, needed a different method.

So owners added racial restrictions to deeds that did not have them. On Capitol Hill, nearly a thousand owners did this in a coordinated campaign in the late 1920s.

The campaign complicates the claim that covenants were merely unread developer boilerplate. Nearly a thousand owners coordinated to amend documents they already held.

The covenants are not history in the sense of being gone. They are history in the sense of being on file.

The University of Washington and Eastern Washington University began systematically mapping these records after the Legislature authorized the work in 2021. The project reports restrictive language in more than 37,000 King County deeds and close to 80,000 properties statewide.

In 2023 the Legislature passed the Covenant Homeownership Account Act, using the research to fund assistance for people harmed by the covenants—a direct payment mechanism tied to a documented historical wrong.

The museum's map does not yet display covenant records, but it does display the same underlying parcels. In north Seattle, Queen Anne, Madison Park, West Seattle, and elsewhere, the legal description of an ordinary lot may still carry this language.

The census of 1920 makes the effect legible without any commentary at all.

The census tract with the heaviest concentration of African American residents, in the Central Area, recorded 450 people.

No census tract north of the Ship Canal, and none in West Seattle, recorded more than 25.

Two numbers, one city. The Central District was not where Black Seattle chose to gather. It was where Black Seattle was permitted to be, and the permission was written on the deeds of everywhere else.

During the Depression, the federal Home Owners' Loan Corporation graded urban mortgage risk from "best" to "hazardous." The lowest grade appeared in red. By mapping existing racial standards as credit risk, federal agencies gave those boundaries official authority.

Seattle's Central Area was recorded as a place where homes were "generally old and obsolete, in need of extensive repairs" — hazardous, and therefore not to be lent on.

A family excluded by covenant from much of the city could then be denied a mortgage in one of the few areas open to them. The combined effect restricted access to the principal American means of building household wealth.

In 1948, in Shelley v. Kraemer, the Supreme Court held that racially restrictive covenants could not be enforced by the courts.

The covenants could still be written, and private actors continued to honor them. Larry Gossett remembered an agent refusing to help his father buy in West Seattle in 1956; a Jewish refugee abandoned a Sand Point purchase after repeated threats.

Removing a rule's legal force did not erase the pattern it had already produced: segregated neighborhoods, unequal prices, and professional practices capable of reproducing exclusion without a court order.

The Fair Housing Act of 1968 finally barred racial discrimination in housing by private as well as public actors.

In 1975 the Central Seattle Community Council Federation published a report under that title. It documented banks in the Central Area and Rainier Valley refusing to lend on any property below a certain price, and it showed that the ratio of deposits to loans in the Central Area was far lower than in the suburbs—money taken from the neighborhood and lent somewhere else.

The Reverend Samuel McKinney of Mount Zion Baptist Church testified to the City Council about his own congregation being refused loans, again and again, for a new sanctuary. It was, he said, "just another attempt, we felt, on the part of the white system to keep black and other poor people from trying to achieve their dreams."

After a city task force and an ineffectual voluntary review board, the Legislature passed HB 323 in 1977, making it unlawful for lenders to vary or deny a loan because of a property's neighborhood.

Nine years after open housing became law, lending discrimination still required organized challenge. Rules governing occupancy proved easier to repeal than entrenched decisions about who could borrow.

After an advisory committee recommended an open-housing ordinance in 1962, young people from the Central Area Youth Club occupied the mayor's office and the Reverend Samuel McKinney organized a march on City Hall. A 1964 fair-housing test found landlords almost never offered the same apartment to a Black applicant shown to a white applicant.

That same year Proposition 1 — an ordinance banning racial discrimination in the sale and rental of property — went to the ballot. Seattle voted it down by more than two to one.

Apartment owners and real-estate agents called the proposal "dictatorial" and "confiscatory," campaigning against "forced housing" in the name of property rights and personal freedom.

In 1965 the Seattle Real Estate Board told its members to show all listings without discrimination. National uprisings also increased pressure on white civic leaders to act.

On 19 April 1968, three weeks after the assassination of Martin Luther King Jr., the Seattle City Council passed an open housing ordinance unanimously, with an emergency clause making it effective at once. Its architect was Sam Smith, the first African American to sit on the Council.

A measure stalled in 1962 and rejected by voters in 1964 passed without dissent four years later. Congress enacted the federal Fair Housing Act that same year.

In 1970 the Central District was about 73 percent Black. By the late 2010s, published accounts placed the share below 20 percent. A current figure should be read from a dated census source rather than inferred from that older trend.

Areas shaped by loan refusal and disinvestment remained Black and relatively inexpensive for decades. When prices rose, many lower-income families lacked the ownership or accumulated equity that could have helped them benefit from the change or remain in place.

The harm was not simply neighborhood decline. It was also a recovery whose gains were distributed differently from its earlier costs.

By 1968 the earlier rules had already shaped who held title, who could borrow, and who had equity. Later price changes compounded those unequal starting positions even without an explicit covenant being enforced.

The calculator reads a parcel boundary, a zoning designation, and a set of current rules, then estimates how many homes may fit.

Each input has a history. Early claims influenced parcel boundaries. Regrades changed slopes and values. Covenants and lending practices shaped who could hold title and accumulate equity. Zoning was layered onto the resulting city.

The sources reviewed here do not establish that single-family zoning was racial covenants under another name. The policies emerged in the same period, but that is chronology and not yet a fact about cause.

The evidence does show that today's parcel geography is inherited rather than neutral. When the calculator says a backyard cottage may fit, it is measuring space produced by all six rooms.

Go and look at a parcel.