density is not really a challenge, it's just a question of city laws and zoning. if you allow 5-6 story apartment buildings and eliminate onerous process and r

density is not really a challenge, it's just a question of city laws and zoning. if you allow 5-6 story apartment buildings and eliminate onerous process and requirements (like parking minimums, setbacks, design reviews, "environmental" reviews, etc etc.) then you will see these neighborhoods being built.