[FourOneFive]

From what I've read with 301 Mission, the project sponsors should begin clearing the site and demolishing existing low rise buildings in February. Construction of SF's first 600+ft building in nearly 20 years should begin shortly thereafter.

As for the Century, the site it is proposed for is zoned for 500ft, which means it could go up to 550ft with a crown (prehaps higher with all of San Francisco funny zoning loopholes). At 475ft, I'm sure the original developers could have pushed for a taller structure, but economically, 475ft would probably have provided an adequate amount of housing units to justify the overall costs. With 555 Mission, I know the city approved a floor increase from 29 to 33 floors after the project was approved, but I don't know if that included an increase in height. (It's a shame that 555 Mission is on hold though!) Unfortunately, any dramatic changes in the height of The Century would probably require a new EIR and another vote at the Planning Commission.