“The real estate industry has played a huge role naming neighborhoods,” said fateful battle that took place at that hill during Ireland’s 1798 rebellion against …

Could neighboring companies in a libertarian society band together to prevent competitors from building in their neighborhood, given that there are no zoning laws and “community consent” is the name of the game?

Not quite.

First, ”community consent” is not the overriding factor. Property rights are. If you own land, you can use it for any peaceful purpose, i.e., in a way that does not initiate violence. Competing against another company is a peaceful purpose.

Second, it is not the case that there is no zoning, but that the zoning rules are accepted voluntarily, and are based on private contracts, as in a neighborhood or condo association.

So, could a condo association form that states that only one person in that building may run a shoe shine in the lobby? Yes, of course. That is the kind of agreement that free men ought to be able to make. If you don’t like such a rule then you might not want to buy a condo in that building. But note that this is entirely different than the doorman and the shoe shine guy agreeing between themselves that they’ll beat up any newsboy that tries to enter the building.

Of course, if the businesses actual own the dwelling units then they can set their own terms, including restricting competition. That is true today as well, e.g., on a cruise ship or at a Disney park, you cannot just start selling your own beer. And you cannot bring your own food into a cinema. In a sense this pushes competition to another level, to among cruise lines, theme parks, theater chains, etc.