The above verse teaches that you can make a sukka at any time during the seven days of Sukkos.This includes:
Even if you neglected to build it before Sukkos.
Your sukka blew down on Yom Tov.
A ger who converts on Chol Hamoed.(ShA 1 – MB 1,2)
The above verse also teaches that you can eat in one sukka and sleep in another. (MB 4)
You aren’t allowed to erect a sukka on Yom Tov. Do not even add some schach to where the wind blew it off of your sukka. However, you may instruct a gentile to do it. (MB 1)
The above verse also teaches that a stolen sukka is disqualified.This includes:
Removing the entire sukka structure from your friend’s domain (e.g. a sukka on a boat or on a wagon).
You gave your neighbor permission to build a sukka on your property. Subsequently you ousted him and moved into his sukka.(ShA 3)
If you want to use your neighbor’s sukka and he is not home, you can rely on permission from his wife. If no one is home, you are allowed to use his sukka without permission provided that he will not return before you leave. (MB9)
You should get permission from the city government to build sukkos on public property.If you have not secured permission,the road immediately in front of your house is the best place to build your sukka.Otherwise, if you have no other option, you may make a beracha on a sukka built on public property. (Rama 3 – MB 10)
If you have permission from the locals to cut schach-branches from the forest, it is acceptable. Likewise, you may buy branches cut and sold by gentiles.(Rama 3 – MB 11)