Walk a few feet up 16th Street from Mission, and there’s a door with a sign reading “Station 40.” It has a makeshift bell: You have to pull on a rope, and an old-fashioned clanger rings manually on the second floor.

The stairs are a bit dilapidated, and the walls are covered with political posters. At the top is a large, comfortable open space with a kitchen, couches, a movie screen and a table that seats most of the 12 people who are living there. The tenants built it all — and now they’re facing eviction. The property owner says their lease doesn’t allow residential use.

Next door, there’s a gate with a more traditional electronic bell, and through the bars, you can see a clean, modern staircase with nice lighting. There is no sign on the door, no marking to show the occupants. A logo for an old Yoga studio is painted on the wall — but it’s not a studio any more. It’s a tech office....

It’s about as deep an historic and political irony as you can get in the Mission in 2015: A landlord wants to evict a collective household on the grounds that people aren’t supposed to be living in the space that they have lived in for a decade – while in the same building, he has rented space to a tech company that, under city zoning rules, clearly isn’t supposed to be there.