It means do all resident have own parking lot?

Each apartment gets there own parking space in the alley behind the apartments not bad compared to the majority of Capital Hill smaller apartment buildings.

I doubt all of the tenants have their own parking space. I don't think each apartment has a corresponding parking spot, either. Going from memory (so I could be wrong) there didn't seem to be as many spaces as apartments there. You might want to contact the property manager for the building. I don't know who that is, and it may be person or a business. If it's a person, they may or may not live in the building. If you are a resident of that building, or you plan to be, I'd suggest getting in touch with the property manager as early as possible. If you have a disability that qualifies you for a disability permit, you should let them know this as well. If they are like the rest of Seattle, they probably have a waiting list for parking and it's probably pretty long. They may priotize requests from people who have a greater need for parking due to a disability, and similarly, they may prioritize requests from residents ovet people who just want a monthly parking spot.