> I go to tribunal who will cite all of the government's recent purchases from my neighbors
That's an assumption on your part. Both the owner and the city can mount a legal case as to why their price is the correct one. In practice, this is often done by comparison with other properties in the same area and with the same characteristics. The judge also gets to visit the actual property to have its own perspective on it. Both the owner and the city have access to the same data when it comes to properties sold and bought, and must establish their cases based on concrete notarial deeds.
There are indeed cases where the city makes a counter-proposal with a price that is significantly lower than market rates, but you have court rulings that reject these and side with the owner. I don't think it's perfect, but it's not one-sided like you describe.
It can be frustrating, but eventually the city is not just a bunch of houses piled up in a completely decentralized way, and the preemption right, which has exceptions, for example properties recently built cannot be preempted, and which isn't automatic, i.e. there are multiple recourses for owners, is there so that the city has some leeway to conduct policy with regards to housing.
But the market is completely distorted because the government is close to a monopsony. Especially if they "preempt" an entire neighborhood. There's no private sales to point the tribunal to in that case so they have utter control over the price
That's an assumption on your part. Both the owner and the city can mount a legal case as to why their price is the correct one. In practice, this is often done by comparison with other properties in the same area and with the same characteristics. The judge also gets to visit the actual property to have its own perspective on it. Both the owner and the city have access to the same data when it comes to properties sold and bought, and must establish their cases based on concrete notarial deeds.
There are indeed cases where the city makes a counter-proposal with a price that is significantly lower than market rates, but you have court rulings that reject these and side with the owner. I don't think it's perfect, but it's not one-sided like you describe.
It can be frustrating, but eventually the city is not just a bunch of houses piled up in a completely decentralized way, and the preemption right, which has exceptions, for example properties recently built cannot be preempted, and which isn't automatic, i.e. there are multiple recourses for owners, is there so that the city has some leeway to conduct policy with regards to housing.