• Maybe it's an "only in San Francisco" thing, but some building owners are finding that taking out modern alterations in old buildings can give them an edgy attractiveness for which some tenants are looking.
• San Francisco office rents led the nation in the second quarter, rising 6.4% from a year earlier, and vacancy has been going down for two years.
• The strategy of attracting start-ups or slightly "out there" tenants by exposing pipes or beams or window frames costs money, and landlords take a chance by making the space less flexible.

From the article:

San Francisco landlords are finding a new way to attract desirable start-up tenants: tear up conventional-style office buildings to give them an edgier feel. ...