Encourage market stewardship of wilderness lands and open spaces. Libertarians believe wilderness lands and open spaces are best protected by voluntary groups. Americans have a long history of charitable giving to worthwhile causes, especially when they're allowed to keep more of the money they earn. Allow people to regulate growth through community covenants and other voluntary arrangements. When people want to develop a plot of land for their homes, they are able to create a community contract for land management.
New developments can have mass transit, paths for biking and walking, open spaces, and so on.
People are free to create such communities on the free market, but they are not free to force their visions on others who may want a different lifestyle. Restore Common Law protections of private property. Zoning laws simply aren't necessary to handle conflicting land uses. To take a hypothetical, if someone wanted to start a pig farm right next to a residential home, the home owner would pursue restraints and restitution through the courts. The home owner has a prior property right which would be infringed by the smells and noises of the pig farm.