>>1760040No. Urban sprawl isn't the only thing consuming vast amounts of land. Agriculture displaces far more native habitat and turns it into a practically dead monoculture.
The best thing you can do would be to own land and keep it as a native ecosystem. Try to balance the scales that there are a significant amount of edible and useful plants. The more of your food and resources you can get from a native ecosystem that provides ecosystem services (habitat for insects and pollinators, animals, fungi, plants etc and soil building, water retention, shit like that) the better. The more you can reduce your strain on destroying the native habitat the better. Everything you want that's not a native, you should grow as organically and as close to it's role in nature as possible. It will still be many times better than conventional agriculture.
For housing, you should build something with local materials, energy efficient and doesn't take up the landscape. Cody Lundins house is a great example of this.
https://www.codylundin.com/codys_house.html Of course this will all depend on your local environment so there's no one size fits all solution.
If you say there's not enough land for everyone to do this and still have wilderness, you are probably correct. The earth is severely overpopulated, but people living in cities won't fix that. The population will come down eventually, whether voluntarily or by catastrophe, the thing you should focus on is ensuring as much biodiversity remains until that happens.