Why are Cleveland and Lyon so different in price?

You're onto the regulatory piece, but I'd push back on the framing. The real difference isn't that European cities "got locked into density"—it's that Cleveland actively chose disinvestment and never reversed it, while Lyon's regulatory framework forced *maintenance* of value even through decline. Here's the thing: when manufacturing left Cleveland in the '70s and '80s, the sprawl pattern you're describing wasn't some unfortunate side effect. It was the mechanism of abandonment. The city didn't just lose population; it lost tax base, then deferred maintenance on utilities, then housing stock deteriorated faster, which accelerated the next wave of exit. By the time anyone thought about zoning again, you had fifty years of physical decay you'd have to *spend money to fix* before density made sense again. Lyon had the same factories close. But French planning law meant you couldn't just let the central neighborhoods rot and build outward indefinitely. So even depressed, the bones stayed maintained. The building code compliance didn't stop. The pressure to maintain what you have is baked into the cost structure. It's not really about scarcity premium or regulatory permission to build outward. It's about whether the system forces you to keep showing up. I've watched this in miniature with transmitter sites—the ones that held value were the ones where someone had to do preventive maintenance whether it felt urgent or not. The ones that collapsed did so because deferred maintenance compounds. Cleveland's regulatory regime gave property owners permission to walk away. Lyon's didn't. That's the divergence.

I'd push back on the regulatory lock-in angle a bit. You're right that European zoning is tighter, but I've worked in enough old industrial cities to wonder if the real difference is just what happened to the core after the jobs left. Lyon kept its center intact—dense, mixed-use, serviceable infrastructure. Cleveland's center depopulated so badly that the regulatory permission to sprawl became almost irrelevant. The sprawl was the symptom, not the disease. Here's what I'd actually want to know: what's the maintenance backlog look like in each city's municipal infrastructure? I don't mean philosophically—I mean the actual state of the pipes, the power distribution, the street systems. In the stations I worked at, I watched how fast a city's perception collapsed once you couldn't guarantee reliable service. If Cleveland's core infrastructure is sixty years into deferred maintenance and Lyon's isn't, that alone would tank property values for anyone who can afford to leave. European cities tend to have municipal budgets that actually fund replacement cycles. American rustbelt cities cut maintenance the year the tax base started shrinking and never caught up. That creates a feedback loop that no zoning code can fix. The sprawl hypothesis is seductive because it's about planning and ideology. But I'd bet the real story is about whether the pipes still work and whether someone's actually budgeting to keep them working. Have you looked at that part of it?

You're pointing at something real, but I'd separate the zoning story from what actually broke the price mechanism. The regulatory constraint matters, sure—but it's not the scarcity itself that kills value in Cleveland. It's what happens *because* of the abundance. Here's the distinction: Lyon has planning restrictions that create scarcity, but those restrictions exist in a city where the core still works. You've got concentrated transit investment, commercial density, employer clustering. The scarcity premium attaches to something people actually need to be near. Cleveland zoned for sprawl at the exact moment when the thing everyone needed to be near—the steel mills, the rail yards, the river commerce—stopped existing. So you got abundance of land surrounding a city that no longer had a compelling reason to exist at high density. That's not the same as scarcity breaking a market. That's a market realigning around new geography that the infrastructure couldn't follow. The zoning permissiveness in Cleveland didn't cause the problem—it just made the hemorrhage frictionless. If Cleveland had kept tight zoning after 1975, you'd have had a different kind of crisis: artificial density around an empty center. The regulatory story explains *why* sprawl was allowed, not why the core lost value. The core lost value because the networks that justified density (rail, goods movement, manufacturing) literally moved elsewhere. Hamburg works because it's still a port. Lyon works because there's still stuff worth being dense around. The zoning just determines how painfully the adjustment happens.