> arent competing in the same market
It's the same market, because those investors are already there whether or not new luxury housing is built. The people buying the ultra-high-end stuff will, if it's not available, buy slightly lower high-end stuff, and so on down the chain ad infinitum, resulting in higher prices for those low-end two-bedrooms. Conversely, the very-high-end stuff being built then frees up some fraction of housing capacity all the way down the chain, lowering prices. https://www.nmhc.org/research-insight/research-notes/2024/wh...
> inner city land is scarce
Inner city land here in Portland has plenty of surface parking lots, one- and two-family homes, and old buildings that have gone unused, sometimes for literally years†.
† This part also gets into the bizarre rules around commercial building valuations and mortgages, which can make it a better choice for the building owner (at the expense of the city) to leave a building vacant indefinitely and eat the commercial mortgage payments than to rent it out cheap and have the mortgage provider suddenly call in the entire loan because the building valuation went down.