Leasee
The tenant or leaser.
building worker
There is no such time period. If you are renting you are not building equity in the property.
If you have homeowners insurance I would call them and they can recommend the best person for you. If you are renting then it will be your landlord's job to fix it and you should call them.
an architect designs a building
a janitor.
Security guards
A person renting out a place may be the owner, an agent, a landlady, a landlord, or a tenant subletting space.
Planning a house:Architect. Actually building a house:Builder.
It really depends on who you are renting from. When in doubt, mention it.
You can make money by renting a dedicated server by renting to more than one person. You can also make money by selling to advertisers.
Building Custodian.