> i'm yet to see a high-rise development resulting in cheaper housing, at least in US. No that i'm against it - i like it, when it is done right, for different reasons though.

It definitely won't be one or 2 developments; there has to be a systematic increase in the housing stock. Which is why the latest California plan (which was shot down in committee) to increase the density around mass transit by default was so amazing.

SF is NYC in the making. I know SF folks don't want to change the character of the city but something has to give; its attracting way too many people and we still need affordable housing for middle class folks.

Right. Only by building up will San Francisco finally achieve New York City's cheap rents.

Replacing large swaths on single story single family houses with multiparty rentals does not necessarily involve any high rise buildings. Paris and Barcelona have proven that very high density can be achieved with four to six stories or less.

are you suggesting that Paris is [more] affordable for software engineers? Quick check shows that the prices in Paris are about E10K per square meter - basically SV prices while salaries as far as i know are significantly lower there.

I have only vague idea about Barcelona - quick check shows like it may be on the scale of E5K per square meter (it was $100K per 2-3 bdrm 20 years ago, so 3x-4x today seems reasonable) So you need to have like at least $60K salary - do they have that there?

Again, i'm not against high[er] density. I'm against it being suggested as the panacea for housing affordability crisis - as far as i see it looks like it may even worsen the crisis (at least for some less fortunate people - like relatively affordable low income communities being displaced by upscale new construction like we have happening everywhere in SV).

Please just show where higher density did help to alleviate the affordability crisis. I think even the massively empty apartments in all these massively constructed ghost towers in China aren't falling in prices.

What evidence exactly are you looking for? If you compare two different cities with different housing densities, you're not only changing the housing density but (likely) also the value of the housing (since it increases availability of services and so on). It's not possible to magically adjust one variable while not touching the others.

However, if the prices in silicon valley were, say, 30% lower than they are now due to zoning which allowed more housing, would that constitute as evidence? You could still say that the "prices are high, higher density housing doesn't work!" - even if the higher density housing would've decreased prices by non-trivial amounts.

In any case, it's weird to see people objecting to basic supply and demand when it comes to housing.