But why does the high density housing have to be where the SFH are? Why does it need to share the parking, facilities, retail, roads, schools, etc. of something that was built and has been maintained and evolved for 50-100 years? Why not build the high density with it's own transit, roads, malls, parks, schools etc?<p>This is how it's done in the rest of the world, certainly Korea, Japan, and China. I see this in England and France as well. They develop a high density area with new facilities that can grow and evolve for how people want to live there, rather than mowing down houses (in communities of color) or plopping 5-7 story apartments without parking or parks right next to single story SFH, as developers like to do in the US.<p>I assume it's because it's more profitable for the developers. They don't have to build anything, but the part they can immediately sell, and they ride on the value of the neighborhood created by the people who already live there. I think some infill near commercial districts or malls also faces much less "NIMBY" criticism.<p>To give a more personal example: I like the location and view of where you live. I like the plants you water, and you keep the house looking clean. I want to just build another large room on top of your house, where me and a bunch of friends will live. We'll just share the stairs, hallways, and front door, and of course our share of the water and electric bill. We probably won't be too loud most nights, and usually when friends come over they won't use your bathroom or take anything from your rooms, or at least we'll ask them not to. Sorry about the construction noise while we do it, and just think you'll get to meet so many new people! Sorry that the part of your house you still own will be worth less than your neighbors when we're done, but that's the price you need to pay for living in a nice place and keeping it up.<p>The argument that SFH infrastructure repair is subsidized by new building is a much better one. Of course that was true of the tax increases and subsidy of the original town, when the SFH were built as well.