Comment by toss1

Yup, part of the problem is the City broke their agreement, but it seems no one with standing exists to legally protest.

One way to do this sort of thing so that it works is not a deed restriction, but to donate the rights to a third party.

We can think of property as a bundle of rights, the right to build, the right to cross the land on various vehicles or with wires or pipes, the right to subdivide, the right to mine or extract minerals, water rights, etc. For example, a piece of land may have an easement for the power company to erect poles or run lines across a strip on the land, or there may be an easement for a road or railway tracks.

Related to this particular example, the Nature Conservancy [0] runs programs whereby landowners can put a conservation easement on some or all of their land which prohibits further development (there are also other orgs doing similar work, particularly in smaller parcels as the NC often works with large areas).

The owner gets a tax deduction for donating the land development rights to a charitable org (and this usually reduces the price at which the land can be sold, at least in the short term), and the Nature Conservancy now has the right to ensure no one ever develops the land. The land can then be passed on to heirs and/or sold, but the land cannot be developed because the Nature Conservancy now owns the development rights and has standing to sue to protect the rights from being exploited.

[0] https://www.nature.org/en-us/what-we-do/our-priorities/prote...