Six stories isn&#x27;t so bad; that&#x27;s what they have throughout most of Paris, and it&#x27;s enough to support vibrant, gloriously walkable neighborhoods with world-class transit and lots of public open space.<p>In SF, the vast majority of the city is zoned for a maximum of <i>four</i> stories, including the parcels surrounding most of its major transit hubs:<p><a href="http:&#x2F;&#x2F;redd.it&#x2F;3qu9uv" rel="nofollow">http:&#x2F;&#x2F;redd.it&#x2F;3qu9uv</a><p>If we added those two extra stories, even just within 1&#x2F;8th of a mile of transit hubs, it would yield enough housing to make a big dent in everyone&#x27;s rent. We wouldn&#x27;t even need any truly tall buildings.