The full version of this story is available at Sightline.

As cities across Cascadia look to technological solutions, such as modular construction, to help address the region-wide shortage of affordable housing, one of the biggest factors currently driving up costs is also one of the most resistant to intervention: Land prices, which can add tens of thousands of dollars to the cost of producing a single subsidized apartment.

Cities don’t have a lot of tools for lowering land costs, but they do own a lot of land—Seattle, for example, is sitting on more than 180 excess or underutilized parcels, many of which are well-suited for homebuilding.

To maximize taxpayer value, most cities usually auction off their excess land to the highest bidder, just like any private landowner would do. But in cities with hot real estate markets, affordable housing developers typically don’t have the financial resources to compete for land with market-rate developers. So publicly-owned land ends up in private hands, forever forfeiting its potential to help overcome one of the biggest barriers to the construction of subsidized homes: acquisition of land to build on. The backers of Seattle’s Rainier Valley Food Innovation Hub, for example, have been repeatedly outbid by private developers.

But what if local governments viewed surplus land not as a revenue generator but an opportunity to reduce displacement and stabilize communities? Several Northwest cities have begun asking that very question. The result is a growing string of affordable housing projects stretching through Cascadia—from the largest one-time investment in housing on city-owned land in Canada’s history, to an affordable housing and preschool development on the site of a former fire station in Seattle.

How much publicly owned land is there?

Enterprise Community Partners’ interactive mapping tool shows publicly owned properties.

Until recently, if you wanted to know what public land was available in the Seattle area, there was no central database—no way to easily find out, say, if a certain fenced-off plot of land that looked ripe for development was owned by the city or Sound Transit or King County, whether it had the right zoning, and whether it was up for sale. In 2015, newly elected King County Assessor John Arthur Wilson decided to do something about that; he directed his office to create a map of every piece of publicly owned land inside county limits.

The nonprofit Enterprise Community Partners expanded on Wilson’s effort, recently launching the beta version of an interactive tool that allows any interested party to use filters to narrow down a list of about 10,000 developable public properties according to specific characteristics, such as zoning, square footage, and eligibility for tax credits.

“In high-cost cities, it’s really becoming impossible for nonprofits to develop on privately owned land,” James Madden, the Seattle-based senior program director for Enterprise, says.  “The average land price, as a percentage of the total cost of development in Seattle, is about 10 to 15 percent, and if land continues to get more expensive, [nonprofits] will be priced out completely. Once you’re paying more than $30,000 a door [for land], it gets very hard for a public agency to justify spending beyond that level on acquisition.” Market-rate developers can charge higher rents to compensate for high land costs—an option not available to affordable housing providers.

Changing the rules that have prevented public land from supporting affordable housing

Wilson, the assessor, says the mapping tools might have been merely informational—a database of public land for sale at prices out of reach for most nonprofit housing builders—if the state hadn’t taken the next step, by giving local governments the authority to sell their land below market value or give it away for free. “We raised this issue with [state House speaker Frank Chopp] last year,” Wilson says. “After we pulled together the list of publicly owned land, we said, ‘Here’s the problem: A lot of this land is owned by agencies that have to sell it for fair market value,” putting even public land out of reach for many nonprofit agencies. In response, Chopp supported, and the legislature passed, a bill allowing state and local agencies to transfer land to affordable housing developers at little or no cost.

Local leaders quickly took notice. Seattle city council freshman Teresa Mosqueda, who campaigned on the need to build more dense, affordable housing, proposed and passed two pieces of legislation this year designed to encourage the city to give away its surplus property for free. The first, which passed in July, made it possible for Seattle’s electric utility, Seattle City Light, to dispose of its excess land at little or no cost—a major departure from its previous policy, which required the utility to sell property at fair market value.

The second, which the council passed unanimously earlier this month, requires the city to consider whether surplus land can be used for affordable housing and, if so, to make it available for that purpose. The legislation also allows the city to hold onto land while a nonprofit housing partner secures financing; directs the city’s Office of Housing to partner with “culturally relevant and historically rooted” nonprofits in areas where residents are at high risk of economic displacement; and mandates that 80 percent of the funds from any outright sale of city property go into one of the city’s affordable housing funds.

Read the whole piece at Sightline.